Release: v0.2

Mainly for devs to check whether a problem is caused by sandboxing.

.gitignore

@@ -0,0 +1,11 @@
+.user
+.o
+*.user
+*.o
+*.a
+moc_*.cpp
+moc_*.h
+Makefile
+cli/looqs
+gui/looqs-gui
+qrc_*

CHANGELOG.md

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+# looqs: Release notes
+
+## 2022-06-07 - v0.2
+CHANGES:
+- Sandboxing: Add environment variable `LOOQS_DISABLE_SANDBOXING` to disable sandboxing. This is intended for troubleshooting
+- Sandboxing: Fix issue where activation failed on kernels without landlock
+
+## 2022-06-06 - v0.1
+The first release comes with basic functionality. It's a start that can be considered useful to some degree.
+
+looqs is still at an early stage and may exhibit some weirdness and contain bugs.
+
+Tested architectures: amd64.
+
+CHANGES:
+- CLI command "looqs" to add/update/delete and search
+- GUI: "looqs-gui" to search, render previews, and add files to index
+- General: Add multi-threaded indexing of all files (paths, mtime)
+- General: Generate sqlite based full-text search index for: .pdf,.odt,.ods, text files
+- General: Sandboxed content processing
+- GUI: Sandboxed IPC sub-process to render previews.
+- GUI: Add previews for pdf: Render the page the search keywords were found. Highlight the keywords when rendering the page.
+- GUI: Add previews for plaintext files: Extract snippets. Highlight the keywords when rendering the page.
+- General: Add basic filters for query.
+- GUI: Add icon. Special thanks to the following sources:
+	https://www.svgrepo.com/svg/151751/magnifier-with-small-handle
+	https://www.svgrepo.com/svg/52764/open-book
+
+	Thanks!
+- General: Documentation.
+
+- Add packages: Ubuntu 21.10, 22.04
+
+Thanks to all those who provided feedback (and endured bugs) at various stages. You know who you are, thx!

CONTRIBUTING.md

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+# looqs - Contributing
+Contributions are welcome, please use the following guidelines. 
+
+## Repository
+The github repository https://github.com/quitesimpleorg/looqs is the primary one. Pull-Requests and Issues go there, but you can also submit your feedback there. 
+
+Those who prefer a more classical approach can mail their patches etc. to looqs at quitesimple org. Ideally git-format patch and git send-email. 
+
+The repository at https://gitea.quitesimple.org/crtxcr/looqs was supposed to be the main one, but these
+plans are on hold for the time being. Just ignore it. 
+
+## Pull-Requests & Rebasing
+Your merge requests should be submitted against the dev branch. master branch won't be rebased. I'll try to avoid in the dev branch. I definitly rebase WIP/feature branches. 
+
+
+## Commit messages
+Commit messages begin with the component your change affects, e. g.  "gui:", "cli:", "shared:", followed by the class. 
+Then choose an appropriate verb in present tense. Wrong: Fixed, Fixes. Correct: Fix. Make sure lines are not too long, 
+I personally go by gut feeling in this matter. 
+
+If your change has an issue, link it at the end: Closes: https://github.com/quitesimpleorg/looqs/issues/1
+
+Example: "shared: Indexer: Use WildcardMatcher to ignore paths"
+
+## License
+You license your changes under the GPLv3 by contributing.

HACKING.md

@@ -0,0 +1,33 @@
+# looqs - Hacking
+
+## Introduction
+Without elaborating here, I hacked looqs because I was not satisfied with the state of desktop search on Linux.
+
+Originally a set of CLI python  scripts, it is now written in C++ and offers a GUI made using Qt. While a "web app" would have been an option, I prefer a desktop application for something like looqs. I chose Qt because I am more familiar with it than with any other GUI framework. To my knowledge, potential alternatives like GTK do not include as many "batteries" as Qt anyway, so the job presumably would have been harder there.
+
+[CONTRIBUTING.md](CONTRIBUTING.md) contains the instructions on how to submit patches etc.
+
+## Security
+The architecture ensures that the parsing of documents and the preview generation is sandboxed by [exile.h](https://github.com/quitesimpleorg/exile.h). looqs uses a multi-process architecture to achieve this. 
+
+Qt code is considered trusted in this model. While one may critize this, it was the only practical solution. looqs uses its serialization mechanism and other classes to communicate between the non-sandboxed GUI process and the sandboxed processes. 
+
+Set the enviornment variable `LOOQS_DISABLE_SANDBOX=1` to disable sandboxing. It's intended for troublehshooting.
+
+## Database
+The heart is sqlite, with the FTS5 extensions behind the full-text search. I definitly did not
+want to run some heavy Java based solutions. I explored other options like Postgresql, I've discard them due to some limitations back then.
+
+Down the road, alternatives will be explored of course if sqlite should not suffice anymore.
+
+## File format support
+The pdf library is libpoppler. Files such as .odt or .docx documents are opened with libquazip. The XML files in there are not parsed,
+looqs simply strips the tags and that seems to work fine so far. Naturally, this is not the "proper way", so there is room for improvement maybehere. However, those file formats are not a huge priortiy for me personally. libuchardet does encoding detection and conversion. 
+
+Naturally looqs won't be able to index and render previews for everything. Such approach would create a huge bloated binary. In the future, there will be some plugin system of some sorts, either we will load .so objects or use subprocesses. 
+
+## Name
+looqs looks for files. You as the user can also look inside them. The 'k' was replaced by a 'q'. Originally wanted my projects to have "qs" (for quitesimple) in their name. While abandoned now, this got us to looqs.
+
+
+

LICENSE

@@ -0,0 +1,678 @@
+Copyright (c) 2018-2022: Albert Schwarzkopf <looqs at quitesimple period org>
+
+looqs is made available under the following license: 
+
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
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+
+  A patent license is "discriminatory" if it does not include within
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+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
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+
+  13. Use with the GNU Affero General Public License.
+
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+
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+
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+address new problems or concerns.
+
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+
+  If the Program specifies that a proxy can decide which future
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+  Later license versions may give you additional or different
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+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
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+reviewing courts shall apply local law that most closely approximates
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+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

@@ -1,30 +1,101 @@
-# looqs - Looks for files. And looks inside them
-looqs creates a full text search for your files. It allows you to look at previews where your
-search terms have been found. 
-
-Currently, this allows you search all indexed pdfs and take a look at the pages side by side in an instant.
+# looqs - Full-text search with previews for your files
+looqs is a tool that creates a full-text search index for your files. It allows you to look at previews where your
+search terms have been found, as shown in the screenshots below.
 
 ## Screenshots
-Coming soon™
+The screenshots in this section may occasionally be slightly outdated, but they are usually recent enough to get an overall impression of the current state of the GUI.
+
+### Preview
+looqs allow you to look inside files. It marks what you have searched for.
+
+![Screenshot looqs](https://garage.quitesimple.org/assets/looqs/orwell.png)
+![Screenshot looqs search fstream](https://garage.quitesimple.org/assets/looqs/fstream_write.png)
+
+### Results list
+#### Classic results list
+Just enter what you want to find, it will search paths and file content.
+![Screenshot looqs results](https://garage.quitesimple.org/assets/looqs/looqs_diary.png)
+
+#### Searching with filters
+You can be more specific to get what you want with filters
+
+**Filters (long form)**
+![Screenshot looqs results](https://garage.quitesimple.org/assets/looqs/opearting_systems_looqs.png)
+
+**Filters (short form)**
+
+There is no need to write the long form of filters. There are also booleans available
+
+![Screenshot looqs results](https://garage.quitesimple.org/assets/looqs/looqs_beatles_marley.png)
+
+
+## Current status
+Last version: 2022-06-07, v0.2
+
+Please see [Changelog](CHANGELOG.md) for a human readable list of changes.
 
 
 ## Goals and principles
  * **Find & Preview**. Instead of merely telling you where your search phrase has been found, it should also render the corresponding portion/pages of the documents and highlight the searched words.
- * **No daemons**. As other solutions are prone to have annoying daemons running that eat system resources away, this solution should make do without daemons if possible.
- * **Easy setup**. Similiarly, there should be no need for heavy-weight databases. Instead, this solution tries to squeeze out the most from simple approaches. In particular, it relies on sqlite.
+ * **No daemons**. As some other desktop search projects are prone to have annoying daemons running that eat system resources away, this solution should make do without daemons where possible.
+ * **Easy setup**. Similarly, there should be no need for heavy-weight databases. Instead, looqs tries to squeeze out the most from simple approaches. In particular, it relies on sqlite.
  * **GUI & CLI**. Provide CLI interfaces and GUI interfaces
  * **Sandboxing**. As reading and rendering lots of formats naturally opens the door for security bugs, those tasks are offloaded to small, sandboxed sub-processes to mitigate the effect of exploited vulnerabilities.
 
+
+## Features
+- GUI, CLI interface
+- Indexing of file path and some metadata.
+- Indexing of file file content for FTS search. Currently: .pdf, odt, docx, plaintext.
+- Preview of file formats: Currently: .pdf, plaintext
+- Highlight searched terms.
+- Quickly open PDF viewer or text editor at location of preview
+- Search filters
+
+## Supported platforms
+Linux (on amd64) is currently the main focus. Currently, I don't plan on supporting anything else and the sandboxing architecture does not make it likely. I suppose a version without sandboxing might be conceivable for other platforms, but I have no plans or resources to actively target anything but Linux at this point.
+
+### Licence
+GPLv3.
+
+### Contributing
+Please see the [Contribution guidelines](CONTRIBUTING.md) file.
+
+## Documentation
+Please see [USAGE.md](USAGE.md) for the user manual. There is also [HACKING.md](HACKING.md) with more technical information.
+
+
 ## Build
-### Ubuntu 21.04
+
+### Ubuntu 21.10/22.04
+
+To build on Ubuntu and Debian, clone the repo and then run:
 ```
+git submodule init
+git submodule update
 sudo apt install build-essential qtbase5-dev libpoppler-qt5-dev libuchardet-dev libquazip5-dev
 qmake
 make
 ```
 
-## Documentation
-Coming soon™
+The GUI is located in `gui/looqs-gui`, the binary for the CLI is in `cli/looqs`
 
 ## Packages
-Coming soon™
+At this point, looqs is not in any official distro package repo, but I maintain some packages.
+
+### Ubuntu 21.10/22.04
+Latest release can be installed using apt from the repo.
+```
+# First, obtain key, assume it's trusted.
+wget -O- https://repo.quitesimple.org/repo.quitesimple.org.asc  | gpg --dearmor > repo.quitesimple.org-keyring.gpg
+cat repo.quitesimple.org-keyring.gpg | sudo tee -a /usr/share/keyrings/repo.quitesimple.org.gpg > /dev/null
+
+echo "deb [arch=amd64 signed-by=/usr/share/keyrings/repo.quitesimple.org.gpg] https://repo.quitesimple.org/debian/ $(lsb_release -sc) main" | sudo tee /etc/apt/sources.list.d/quitesimple.list
+sudo apt-get update
+sudo apt-get install looqs
+```
+
+### Other distros
+I'll probably add a package for voidlinux at some point and maybe will provide a Gentoo ebuild. However, I would appreciate help for others distros. If you create a package, let me know!
+
+As for distro-agnostic packages, I will also take a look into appimage / flatpak etc.  and/or maybe just provide a self-contained archive.

TODO

@@ -1,33 +0,0 @@
-general database classes instead of sqlite specific code 
-database: set a number of paths to default index. will require an indexer code though
-sandboxing!
-allow from GUI to ues commandlin, e. g. "/add ..." would be the same as "qss add ..." in termial
-
-PdfPreview: Use some kind of paging instead of memory limit
-Consider injecting Logger (default stdout/stderr) to classes instead of using Logger::info()/Logger::error()::
-sync/share GUI and CLI data-structures. Better to share codebase in general
-- cli: tagging
-- cli: command line parser: wrong position of [options] 
-- ability to set the WHERE condition (allow editing the SQL query)
-- Basic OCR in images (screenshots)
-- Index .ebup
-- Preview for: .txt, source code files, .ebup, images
-- index: DVD menus, media metadata in audio/files etc?
-- Stats: Number of results found
-- PdfPreview: Files per file, or directory (so basically filter the 
-results)
-- Hide PdfPreview Tab if there are no pdfs in the results
--Tagging: add an "addtag" utility, to assign tags to folder and files
--gui: Search expclitly for tags, list by tags, remove tags, add tags
--gui: Filter already found results. For example, "show only folders",
-or just search with those results.
--split each tab into own class, not everything in mainwindow.cpp?
-Menu:
--Delete from index
--Delete from fs
--Reindex
-Filter:
-type:d 
-type:file
-mtime:
-tag:

USAGE.md

@@ -0,0 +1,176 @@
+# looqs - User guide
+This document is still work in progress.
+
+## General points
+Please consult the [README](README.md) for a description of what looqs is and on how to obtain it.
+
+looqs is still at an early stage and may exhibit some weirdness and contain bugs.
+
+## Current Limitations and things to know
+You should be aware of the following:
+
+- It may seem natural, but the GUI and CLI operate on the same database, so if you add files using the CLI, the GUI will search them too.
+
+- If a file is listed in the "Search results" tab, it does not imply that a preview will be available in the "Previews" tab, as looqs can search more file formats than it can generate previews for currently.
+
+- Database paths are stored inefficiently, not deduplicated to simplify queries. This may add up quickly. Also, each PDF text is stored twice. Each page separately + the whole document to simplify queries.
+To give you some idea: At the time this section was written, 167874 files were in my index. A FTS index was built for 14280 of those, of which 4146 were PDF documents. The PDFs take around 10GB storage space on the filesystem. All files for which an FTS has been built are around 7GB in size on the filesystem. The looqs database had a size of 1.6 GB.
+
+- Existing files are considered modified when the mtime has changed. looqs currently does not check whether the content
+has changed. 
+
+## Config
+The config file is in `$HOME/.config/quitesimple.org/looqs.conf`. It will be created on first execution of the CLI or GUI
+interface. The GUI has a menu entry to quickly open this config file. This is to be considered temporary and will be removed once the GUI itself can edit all settings.
+
+Database default path: `$HOME/.local/share/quitesimple.org/looqs/looqs.sqlite`. If this does not work for
+you, move it and adjust adjust the path in the config file.
+
+
+## GUI
+The GUI is minimal at this point. Depending on what you want to do, you may need to open the config file and change the settings there. Chances are that you may not need to do that. 
+
+### First run
+You will be presented with an empty list. Go to the **"Index"** tab, add some directories and click **"Start indexing"**.
+
+For large directories the progress bar is essentially just decoration. As long as you see the counters
+increase, everything is fine even if it seems the progress bar is stuck.
+
+The indexing can be stopped. If you run it again you do not start from scratch, because looqs knows
+which files have been modified or not since they have been added to the index. Thus, files will
+only be reprocedded when necessary. Note that cancellation itself may take a moment as files finish processing. 
+
+### Search
+The text field at the top is where you type your query. It can be selected quickly using **CTRL + L**. Filters are avalable,
+see this document at the end. By default, both the full path and the content are searched. Path names take precedence.
+
+### Configuring PDF viewer
+It's most convenient if, when you click on a preview, the PDF reader opens the page you clicked. For that, looqs needs to know which viewer you want to launch.
+
+It tries to auto detect some common viewers. You must set the value of the ```pdfviewer=``` config entry yourself if it doesn't do something you
+like, such as not opening your favorite viewer. In the command line options, "%f" represents the filepath, "%p" the page number.
+
+### Preview tab
+The preview tab shows previews. It marks your search keywords too. Click on a preview to open the file.
+A right click on a preview allows you to copy the file path, or to open the containing folder. Hovering tells you which file the preview originates from.
+
+### Syncing index
+Over time, files get deleted or their content changes. Go to **looqs** -> **Sync index**. looqs will reindex the content of files which have been changed. Files that cannot be found anymore will be removed from the index.
+
+Reindexing a path using the "Index" tab will index new files and update existing ones. Currently however, this does not deal with deleted files.
+
+I recommend doing a sync from time to time.
+
+## CLI
+The CLI command "looqs" comes with helptext. This documentation is incomplete at the moment.
+
+### First run
+There is no point in using the "search" command on the first run. Add some files if not done so already.
+
+### Adding files
+To add files to the index, run ```looqs add [path]```, where 'path' can be a directory or a single file.
+If the path is a directory, the directory will be recursively descended, and all files in there added.
+
+"Skipped" implies the file has not been changed since it has been added to the index. If it has changed, the index content will be updated.
+
+### Searching files
+Of course the CLI will not render any previews, but it can show you the paths where search results
+have been found.
+
+```
+looqs search [terms...]
+```
+
+There is an implicit "AND" condition, meaning if you search for "photo" and "mountain", only paths
+will be shown containing both terms, but not either alone.
+
+### Deletion and Fixing Out of sync index
+You sometimes delete files, to get rid of those from the index too, run:
+
+```
+looqs delete --deleted --dry-run
+```
+
+This commands lists all files which are indexed, but which cannot be found anymore.
+
+Remove them using:
+```
+looqs delete --deleted --verbose
+```
+
+You can also delete by pattern:
+
+```
+looqs delete --pattern '*.java'
+```
+
+Delete never removes anything from the file system, it only operates on the database.
+
+The equivalent of the GUI sync command is:
+```
+looks update -v --continue --delete
+```
+
+
+### Updating files
+The content and metadata index for files can be updated:
+
+```
+looqs update -n
+```
+
+Those files still exist, but the content that has been indexed it out of date. This can be corrected with
+
+```
+looqs update
+```
+
+This will not add new files, you must run ```looqs add``` for this. For this reason, most users
+will probably seldomly use the 'update' command alone.
+
+
+## Tips
+
+### Keeping index up to date
+The most obvious way is to use the GUI and add your favorite paths in the "Index" tab. Then occasionally, just rescan. This works for me personally, looqs quickly picks up new files. This however may not be good enough for some users.
+
+Some users may prefer setting up cronjobs or wire up the CLI interface with file system monitoring tools such as [adhocify](https://github.com/quitesimpleorg/adhocify).
+
+### lh shell alias
+If you are in a shell and you know your file is somewhere in your current directory or its subdirs, and those
+are indexed by looqs, you may find the lh (look here) alias useful:
+
+```
+alias lh='looqs search $(pwd)'
+```
+
+So typing "lh recipes" searchs the current dir and its subdirs for a file containing 'recipes'.
+
+## Query syntax / Search filters
+A number of search filters are available.
+
+| Filter (long) |  Filter (short) | Explanation |
+| ----------- | ----------- |----------- |
+| path.contains:(term) | p:(term) | Pretty much a SQL LIKE '%term%' conditions, just searches the path string |
+| path.ends:(term) | pe:(term) | Filters path ending with the specified term, e. g.: pe:(.ogg) |
+| path.begins:(term) | pb:(term) |  Filters path beginning with the specified term |
+| contains:(terms) | c:(terms) | ull-text search, also understands quotes | 
+
+Filters can be combined. The booleans AND and OR are supported. Negations can be applied too, except for c:(). 
+The AND boolean is implicit and thus entering it strictly optional. 
+
+Examples:
+
+| Query | Explanation |
+| ----------- | ----------- |
+|pe:(.ogg) p:(marley)| Finds paths that end with .ogg and contain 'marley' (case-insensitive)
+|p:(slides) support vector machine           |Performs a content search for 'support vector machine' in all paths containing 'slides'|
+|p:(notes) (pe:(odt) OR pe:(docx))          |Finds files such as notes.docx, notes.odt but also any .docs and .odt when the path contains the string 'notes'|
+|memcpy !(pe:(.c) OR pe:(.cpp))| Performs a FTS search for 'memcpy' but excludes .cpp and .c files. 
+|c:("I think, therefore")|Performs a FTS search for the phrase "I think, therefore". 
+
+
+
+
+
+

cli/cli.pro

@@ -14,60 +14,29 @@ DEFINES += QT_DEPRECATED_WARNINGS
 # In order to do so, uncomment the following line.
 # You can also select to disable deprecated APIs only up to a certain version of Qt.
 #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
-LIBS += -luchardet -lpoppler-qt5 -lquazip5
 SOURCES += \
         main.cpp \
-    encodingdetector.cpp \
-    pagedata.cpp \
-    processor.cpp \
-    pdfprocessor.cpp \
-    defaulttextprocessor.cpp \
     commandadd.cpp \
-    sandboxedprocessor.cpp \
-    tagstripperprocessor.cpp \
-    nothingprocessor.cpp \
-    odtprocessor.cpp \
-    utils.cpp \
-    odsprocessor.cpp \
     commanddelete.cpp \
     commandupdate.cpp \
-    filesaver.cpp \
-    databasefactory.cpp \
-    sqlitedbservice.cpp \
-    logger.cpp \
     commandsearch.cpp \
-    commandlist.cpp
+    commandlist.cpp \
+    command.cpp
 
 HEADERS += \
-    encodingdetector.h \
-    processor.h \
-    pagedata.h \
-    pdfprocessor.h \
-    defaulttextprocessor.h \
     command.h \
     commandadd.h \
-    sandboxedprocessor.h \
-    tagstripperprocessor.h \
-    nothingprocessor.h \
-    odtprocessor.h \
-    utils.h \
-    odsprocessor.h \
     commanddelete.h \
     commandupdate.h \
-    filesaver.h \
-    databasefactory.h \
-    sqlitedbservice.h \
-    logger.h \
     commandsearch.h \
     commandlist.h
-INCLUDEPATH += /usr/include/poppler/qt5/ /usr/include/quazip5
-
-
 
 win32:CONFIG(release, debug|release): LIBS += -L$$OUT_PWD/../shared/release/ -lshared
 else:win32:CONFIG(debug, debug|release): LIBS += -L$$OUT_PWD/../shared/debug/ -lshared
 else:unix: LIBS += -L$$OUT_PWD/../shared/ -lshared
 
+LIBS += -luchardet -lpoppler-qt5 -lquazip5
+
 INCLUDEPATH += $$PWD/../shared
 DEPENDPATH += $$PWD/../shared
 

cli/command.cpp

@@ -3,3 +3,12 @@
 #include <QDebug>
 #include "command.h"
 #include "looqsgeneralexception.h"
+
+void Command::execute()
+{
+	int result = handle(arguments);
+	if(autoFinish)
+	{
+		emit finishedCmd(result);
+	}
+}

cli/command.h

@@ -1,26 +1,39 @@
 #ifndef COMMAND_H
 #define COMMAND_H
 #include <QStringList>
-#include <QSqlDatabase>
-#include <QSqlQuery>
 #include <QThreadStorage>
 #include <QVariant>
+#include <QMutex>
+#include <QWaitCondition>
 #include "utils.h"
 #include "sqlitedbservice.h"
-class Command
+class Command : public QObject
 {
+	Q_OBJECT
+  signals:
+	void finishedCmd(int retval);
+
   protected:
 	SqliteDbService *dbService;
 	QString dbConnectionString;
+	QStringList arguments;
+
+	bool autoFinish = true;
 
   public:
 	Command(SqliteDbService &dbService)
 	{
 		this->dbService = &dbService;
 	}
-
+	void setArguments(QStringList arguments)
+	{
+		this->arguments = arguments;
+	}
 	virtual int handle(QStringList arguments) = 0;
 	virtual ~Command(){};
+
+  public slots:
+	void execute();
 };
 
 #endif // COMMAND_H

cli/commandadd.cpp

@@ -1,7 +1,5 @@
 #include <QFileInfo>
 #include <QDebug>
-#include <QSqlQuery>
-#include <QSqlError>
 #include <QDateTime>
 #include <QMap>
 #include <QTextStream>
@@ -13,6 +11,32 @@
 #include "commandadd.h"
 #include "logger.h"
 
+void CommandAdd::indexerFinished()
+{
+	IndexResult result = indexer->getResult();
+
+	Logger::info() << "Total: " << result.total() << Qt::endl;
+	Logger::info() << "Added: " << result.addedPaths << Qt::endl;
+	Logger::info() << "Skipped: " << result.skippedPaths << Qt::endl;
+	auto failedPathsCount = result.erroredPaths;
+	Logger::info() << "Failed: " << failedPathsCount << Qt::endl;
+	if(failedPathsCount > 0)
+	{
+		Logger::info() << "Failed paths: " << Qt::endl;
+		for(QString paths : result.failedPaths())
+		{
+			Logger::info() << paths << Qt::endl;
+		}
+	}
+
+	int ret = 0;
+	if(!keepGoing && failedPathsCount > 0)
+	{
+		ret = 1;
+	}
+	emit finishedCmd(ret);
+}
+
 int CommandAdd::handle(QStringList arguments)
 {
 	QCommandLineParser parser;
@@ -20,20 +44,13 @@ int CommandAdd::handle(QStringList arguments)
 						"Continue adding files, don't exit on first error. If this option is not given, looqs will "
 						"exit asap, but it's possible that a few files will still be processed. "
 						"Set -t 1 to avoid this behavior, but processing will be slower. "},
-					   {{"a", "all"}, "On error, no files should be added, even already processed ones"},
-					   {{"v", "verbose"}, "Print skipped and added files"},
 					   {{"t", "threads"}, "Number of threads to use.", "threads"}});
 
 	parser.addHelpOption();
 	parser.addPositionalArgument("add", "Add paths to the index", "add [paths...]");
 
 	parser.process(arguments);
-	bool keepGoing = parser.isSet("continue");
-	bool verbose = parser.isSet("verbose");
-	if(parser.isSet("all"))
-	{
-		throw LooqsGeneralException("To be implemented");
-	}
+	this->keepGoing = parser.isSet("continue");
 	if(parser.isSet("threads"))
 	{
 		QString threadsCount = parser.value("threads");
@@ -53,15 +70,19 @@ int CommandAdd::handle(QStringList arguments)
 		}
 	}
 
-	FileSaver saver(*this->dbService);
-	int numFilesCount = files.size();
-	int processedFilesCount = saver.addFiles(files.toVector(), keepGoing, verbose);
-	if(processedFilesCount != numFilesCount)
-	{
-		Logger::error() << "Errors occured while trying to add files to the database. Processed " << processedFilesCount
-						<< "out of" << numFilesCount << "files" << Qt::endl;
-		return 1;
-	}
+	indexer = new Indexer(*this->dbService);
+	indexer->setTargetPaths(files.toVector());
+	indexer->setKeepGoing(keepGoing);
+
+	connect(indexer, &Indexer::pathsCountChanged, this,
+			[](int pathsCount) { Logger::info() << "Found paths: " << pathsCount << Qt::endl; });
+	connect(indexer, &Indexer::indexProgress, this,
+			[](int pathsCount, unsigned int added, unsigned int skipped, unsigned int failed, unsigned int totalCount)
+			{ Logger::info() << "Processed files: " << pathsCount << Qt::endl; });
+	connect(indexer, &Indexer::finished, this, &CommandAdd::indexerFinished);
+
+	this->autoFinish = false;
+	indexer->beginIndexing();
 
 	return 0;
 }

cli/commandadd.h

@@ -3,15 +3,22 @@
 #include <QMutex>
 #include "command.h"
 #include "filesaver.h"
+#include "indexer.h"
+
 class CommandAdd : public Command
 {
   private:
 	SaveFileResult addFile(QString path);
+	Indexer *indexer;
+	bool keepGoing = true;
 
+  protected:
   public:
 	using Command::Command;
 
 	int handle(QStringList arguments) override;
+  private slots:
+	void indexerFinished();
 };
 
 #endif // COMMANDADD_H

cli/commanddelete.cpp

@@ -3,7 +3,6 @@
 #include <QFileInfo>
 #include <QDebug>
 #include <QRegularExpression>
-#include <QSqlError>
 #include "commanddelete.h"
 #include "logger.h"
 

cli/commandlist.cpp

@@ -7,29 +7,31 @@ int CommandList::handle(QStringList arguments)
 {
 	QCommandLineParser parser;
 	parser.addOptions({
-		{{"r", "reverse"}, "Print most-recent changed files first"},
-		{{"c", "count"}, "Counts the number of paths listed"},
-		{"pattern", "Only list files from index matching the pattern, e. g. */.git/*", "pattern"},
+		{"pattern", "Only list files from index matching the pattern, e. g. '*.txt'", "pattern"},
 	});
 
 	parser.addHelpOption();
 	parser.addPositionalArgument("list", "Lists paths in the index", "list [options]");
 
 	parser.process(arguments);
-	bool reverse = parser.isSet("reverse");
-	if(reverse)
+
+	QString pattern = parser.value("pattern");
+
+	QVector<FileData> results;
+
+	int offset = 0;
+	int limit = 1000;
+
+	auto resultscount = dbService->getFiles(results, pattern, offset, limit);
+	while(resultscount > 0)
 	{
-		throw LooqsGeneralException("Reverse option to be implemented");
+		for(FileData &fileData : results)
+		{
+			Logger::info() << fileData.absPath << Qt::endl;
+		}
+		offset += limit;
+		results.clear();
+		resultscount = dbService->getFiles(results, pattern, offset, limit);
 	}
-
-	QStringList files = parser.positionalArguments();
-	QString queryStrings = files.join(' ');
-	auto results = dbService->search(LooqsQuery::build(queryStrings, TokenType::FILTER_PATH_CONTAINS, false));
-
-	for(SearchResult &result : results)
-	{
-		Logger::info() << result.fileData.absPath << Qt::endl;
-	}
-
 	return 0;
 }

cli/commandlist.h

@@ -1,5 +1,5 @@
-#ifndef COMMANDSEARCH_H
-#define COMMANDSEARCH_H
+#ifndef COMMANDLIST_H
+#define COMMANDLIST_H
 #include "command.h"
 #include "../shared/sqlitesearch.h"
 
@@ -11,4 +11,4 @@ class CommandList : public Command
 	int handle(QStringList arguments) override;
 };
 
-#endif // COMMANDSEARCH_H
+#endif // COMMANDLIST_H

cli/commandsearch.cpp

@@ -8,14 +8,19 @@ int CommandSearch::handle(QStringList arguments)
 	QCommandLineParser parser;
 	parser.addOptions({
 		{{"r", "reverse"},
-		 "Print most-recent changed files first. This is short for adding \"sort:(mtime asc)\" to the query."},
+		 "Print most-recently changed files last. This is short for adding \"sort:(mtime asc)\" to the query."},
 	});
 
 	parser.addHelpOption();
 	parser.process(arguments);
 
-	QStringList files = parser.positionalArguments();
-	QString queryStrings = files.join(' ');
+	QStringList terms = parser.positionalArguments();
+	if(terms.length() == 0)
+	{
+		Logger::error() << "Please enter search terms" << Qt::endl;
+		return 1;
+	}
+	QString queryStrings = terms.join(' ');
 	LooqsQuery query = LooqsQuery::build(queryStrings, TokenType::FILTER_PATH_CONTAINS, false);
 	bool reverse = parser.isSet("reverse");
 	if(reverse)
@@ -26,11 +31,19 @@ int CommandSearch::handle(QStringList arguments)
 		query.addSortCondition(sc);
 	}
 
-	auto results = dbService->search(query);
-
-	for(SearchResult &result : results)
+	try
 	{
-		Logger::info() << result.fileData.absPath << Qt::endl;
+		auto results = dbService->search(query);
+
+		for(SearchResult &result : results)
+		{
+			Logger::info() << result.fileData.absPath << Qt::endl;
+		}
+	}
+	catch(LooqsGeneralException &e)
+	{
+		Logger::error() << "Exception:" << e.message << Qt::endl;
+		return 1;
 	}
 
 	return 0;

cli/commandupdate.cpp

@@ -2,9 +2,9 @@
 #include <QFileInfo>
 #include <QDateTime>
 #include <QThreadPool>
-#include <QtConcurrentRun>
 #include "commandupdate.h"
 #include "logger.h"
+#include "../shared/indexsyncer.h"
 
 int CommandUpdate::handle(QStringList arguments)
 {
@@ -13,18 +13,17 @@ int CommandUpdate::handle(QStringList arguments)
 		{{{"v", "verbose"}, "Print path of the files while updating them"},
 		 {{"n", "dry-run"}, "Only print which files would be updated, don't actually update them"},
 		 {"pattern", "Only consider to update files in the index matching the pattern, e. g. */.git/*.", "pattern"},
-		 {{"d", "delete"}, "If a file does not exist anymore, delete it"},
+		 {{"d", "delete"}, "If a file does not exist anymore, delete it from the index"},
 		 {{"c", "continue"},
 		  "Continue adding files, don't exit on first error. If this option is not given, looqs will exit asap, but "
 		  "it's possible that a few files will still be processed. "
 		  "Set -t 1 to avoid this behavior, but processing will be slower."},
-		 {{"a", "all"}, "On error, no files should be updated, even already processed ones"},
 		 {{"t", "threads"}, "Number of threads to use.", "threads"}
 
 		});
 
 	parser.addHelpOption();
-	parser.addPositionalArgument("update", "Checks files for changes and updates them", "update");
+	parser.addPositionalArgument("update", "Checks files for changes and updates the index", "update");
 
 	parser.process(arguments);
 	bool keepGoing = parser.isSet("continue");
@@ -33,84 +32,61 @@ int CommandUpdate::handle(QStringList arguments)
 	bool dryRun = parser.isSet("dry-run");
 	QString pattern = parser.value("pattern");
 
-	if(parser.isSet("all"))
-	{
-		throw LooqsGeneralException("To be implemented");
-	}
 	if(parser.isSet("threads"))
 	{
 		QString threadsCount = parser.value("threads");
 		QThreadPool::globalInstance()->setMaxThreadCount(threadsCount.toInt());
 	}
-	FileSaver saver(*this->dbService);
-	QVector<FileData> files;
-	int offset = 0;
-	int limit = 1000;
-	int processedRows = dbService->getFiles(files, pattern, offset, limit);
 
-	while(processedRows > 0)
+	bool hasErrors = false;
+	IndexSyncer *syncer = new IndexSyncer(*this->dbService);
+	syncer->setKeepGoing(keepGoing);
+	syncer->setVerbose(verbose);
+	syncer->setPattern(pattern);
+	syncer->setDryRun(dryRun);
+	syncer->setRemoveDeletedFromIndex(deleteMissing);
+
+	if(dryRun)
 	{
-		QVector<QString> filePathsToUpdate;
-		for(FileData &fileData : files)
-		{
-			QFileInfo fileInfo(fileData.absPath);
-			if(fileInfo.exists() && fileInfo.isFile())
-			{
-				if(fileInfo.lastModified().toSecsSinceEpoch() != fileData.mtime)
-				{
-					if(!dryRun)
-					{
-						filePathsToUpdate.append(fileData.absPath);
-					}
-					else
-					{
-						Logger::info() << "Would update" << fileData.absPath << Qt::endl;
-					}
-				}
-			}
-			else
-			{
-				if(deleteMissing)
-				{
-					if(!dryRun)
-					{
-						if(!this->dbService->deleteFile(fileData.absPath))
-						{
-							Logger::error()
-								<< "Error: Failed to delete" << fileData.absPath << "from databas" << Qt::endl;
-							if(!keepGoing)
-							{
-								return 1;
-							}
-						}
-						if(verbose)
-						{
-							Logger::info() << "Deleted" << fileData.absPath << Qt::endl;
-						}
-					}
-					else
-					{
-
-						Logger::info() << "Would delete" << fileData.absPath << Qt::endl;
-					}
-				}
-			}
-		}
-
-		int updatedFilesCount = saver.updateFiles(filePathsToUpdate, keepGoing, verbose);
-		int shouldHaveUpdatedCount = filePathsToUpdate.size();
-		if(updatedFilesCount != shouldHaveUpdatedCount)
-		{
-			if(!keepGoing)
-			{
-				Logger::error() << "Failed to update all files selected for updating. Updated" << updatedFilesCount
-								<< "out of" << shouldHaveUpdatedCount << "selected for upating" << Qt::endl;
-				return 1;
-			}
-		}
-		offset += limit;
-		processedRows = this->dbService->getFiles(files, pattern, offset, limit);
+		connect(syncer, &IndexSyncer::removedDryRun, this,
+				[](QString path) { Logger::info() << "Would delete" << path << Qt::endl; });
+		connect(syncer, &IndexSyncer::updatedDryRun, this,
+				[](QString path) { Logger::info() << "Would update" << path << Qt::endl; });
 	}
+	else
+	{
+		connect(syncer, &IndexSyncer::removed, this,
+				[](QString path) { Logger::info() << "Removed " << path << Qt::endl; });
+		/* TODO: updated not printed, handled be verbose in FileSaver, but this can be improved */
+	}
+	connect(syncer, &IndexSyncer::finished, this,
+			[&](unsigned int totalUpdated, unsigned int totalRemoved, unsigned int totalErrors)
+			{
+				Logger::info() << "Syncing finished" << Qt::endl;
 
+				if(!dryRun)
+				{
+					Logger::info() << "Total updated:" << totalUpdated << Qt::endl;
+					Logger::info() << "Total removed from index: " << totalRemoved << Qt::endl;
+					Logger::info() << "Total deleted:" << totalErrors << Qt::endl;
+				}
+
+				int retval = 0;
+				if(hasErrors && !keepGoing)
+				{
+					retval = 1;
+				}
+				emit finishedCmd(retval);
+			});
+	connect(syncer, &IndexSyncer::error, this,
+			[&](QString error)
+			{
+				Logger::error() << error << Qt::endl;
+				hasErrors = true;
+			});
+
+	this->autoFinish = false;
+	syncer->sync();
+	/* Actual return code is handled by finishedCmd signal */
 	return 0;
 }

cli/main.cpp

@@ -5,13 +5,11 @@
 #include <QDataStream>
 #include <QDebug>
 #include <QProcessEnvironment>
-#include <QSqlDatabase>
-#include <QSqlQuery>
-#include <QSqlError>
 #include <QMap>
 #include <QDebug>
 #include <QSettings>
 #include <functional>
+#include <QTimer>
 #include <exception>
 #include "encodingdetector.h"
 #include "pdfprocessor.h"
@@ -22,10 +20,12 @@
 #include "commanddelete.h"
 #include "commandupdate.h"
 #include "commandsearch.h"
+#include "commandlist.h"
 #include "databasefactory.h"
 #include "logger.h"
 #include "sandboxedprocessor.h"
 #include "../shared/common.h"
+#include "../shared/filescanworker.h"
 
 void printUsage(QString argv0)
 {
@@ -50,6 +50,10 @@ Command *commandFromName(QString name, SqliteDbService &dbService)
 	{
 		return new CommandSearch(dbService);
 	}
+	if(name == "list")
+	{
+		return new CommandList(dbService);
+	}
 
 	return nullptr;
 }
@@ -77,6 +81,7 @@ int main(int argc, char *argv[])
 		return 1;
 	}
 	qRegisterMetaType<PageData>();
+	qRegisterMetaType<FileScanResult>("FileScanResult");
 
 	QString connectionString = Common::databasePath();
 	DatabaseFactory dbFactory(connectionString);
@@ -99,16 +104,21 @@ int main(int argc, char *argv[])
 	{
 		try
 		{
-			return cmd->handle(args);
+			QObject::connect(cmd, &Command::finishedCmd, [](int retval) { QCoreApplication::exit(retval); });
+			cmd->setArguments(args);
+			QTimer::singleShot(0, cmd, &Command::execute);
 		}
 		catch(const LooqsGeneralException &e)
 		{
-			Logger::error() << "Exception caught, message: " << e.message << Qt::endl;
+			Logger::error() << "Exception caught, message:" << e.message << Qt::endl;
+			return 1;
 		}
 	}
 	else
 	{
-		Logger::error() << "Unknown command " << commandName << Qt::endl;
+		Logger::error() << "Unknown command:" << commandName << Qt::endl;
+		return 1;
 	}
-	return 1;
+
+	return app.exec();
 }

gui/gui.pro

@@ -23,7 +23,8 @@ DEFINES += QT_DEPRECATED_WARNINGS
 #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
 
 SOURCES += \
-    ipcclient.cpp \
+    ipcpreviewclient.cpp \
+    ipcpreviewworker.cpp \
     ipcserver.cpp \
         main.cpp \
         mainwindow.cpp \
@@ -31,35 +32,43 @@ SOURCES += \
     previewgenerator.cpp \
     previewgeneratormapfunctor.cpp \
     previewgeneratorpdf.cpp \
+    previewgeneratorplaintext.cpp \
     previewresult.cpp \
     previewresultpdf.cpp \
-    previewworker.cpp
+    previewresultplaintext.cpp \
+    renderconfig.cpp \
+    rendertarget.cpp
 
 HEADERS += \
     ipc.h \
-    ipcclient.h \
+    ipcpreviewclient.h \
+    ipcpreviewworker.h \
     ipcserver.h \
         mainwindow.h \
     clicklabel.h \
     previewgenerator.h \
     previewgeneratormapfunctor.h \
     previewgeneratorpdf.h \
+    previewgeneratorplaintext.h \
     previewresult.h \
     previewresultpdf.h \
-    previewworker.h \
-    renderconfig.h
+    previewresultplaintext.h \
+    renderconfig.h \
+    rendertarget.h
 
 FORMS += \
         mainwindow.ui
 
 INCLUDEPATH += /usr/include/poppler/qt5/
-LIBS += -lpoppler-qt5
+
 QT += widgets sql
 
 win32:CONFIG(release, debug|release): LIBS += -L$$OUT_PWD/../shared/release/ -lshared
 else:win32:CONFIG(debug, debug|release): LIBS += -L$$OUT_PWD/../shared/debug/ -lshared
 else:unix: LIBS += -L$$OUT_PWD/../shared/ -lshared
 
+LIBS += -luchardet -lpoppler-qt5 -lquazip5
+
 INCLUDEPATH += $$PWD/../shared
 DEPENDPATH += $$PWD/../shared
 
@@ -68,3 +77,5 @@ else:win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$OUT_PWD/../shar
 else:win32:!win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$OUT_PWD/../shared/release/shared.lib
 else:win32:!win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$OUT_PWD/../shared/debug/shared.lib
 else:unix: PRE_TARGETDEPS += $$OUT_PWD/../shared/libshared.a
+
+RESOURCES = ../looqs.svg

gui/ipc.h

@@ -3,7 +3,13 @@
 
 enum IPCCommand
 {
-	DocOpen,
-	FileOpen
+	GeneratePreviews = 23,
+	StopGeneratePreviews,
 };
+
+enum IPCReply
+{
+	FinishedGeneratePreviews,
+};
+
 #endif // IPC_H

gui/ipcclient.cpp

@@ -1,27 +0,0 @@
-#include <QDataStream>
-#include "ipcclient.h"
-
-IPCClient::IPCClient(QString socketPath)
-{
-	this->socketPath = socketPath;
-}
-
-bool IPCClient::sendCommand(IPCCommand command, QStringList args)
-{
-	bool result = false;
-	QLocalSocket socket;
-	socket.connectToServer(socketPath);
-	if(socket.isOpen() && socket.isWritable())
-	{
-		QDataStream stream(&socket);
-		stream << command;
-		stream << args;
-		socket.flush();
-		result = true;
-	}
-	else
-	{
-		qDebug() << "Not connected to IPC server";
-	}
-	return result;
-}

gui/ipcclient.h

@@ -1,18 +0,0 @@
-#ifndef IPCCLIENT_H
-#define IPCCLIENT_H
-#include <QLocalSocket>
-#include <QString>
-#include <QStringList>
-#include "ipc.h"
-
-class IPCClient
-{
-  private:
-	QString socketPath;
-
-  public:
-	IPCClient(QString socketPath);
-	bool sendCommand(IPCCommand command, QStringList args);
-};
-
-#endif // IPCCLIENT_H

gui/ipcpreviewclient.cpp

@@ -0,0 +1,130 @@
+#include <QLocalSocket>
+#include <QApplication>
+#include "ipc.h"
+#include "ipcpreviewclient.h"
+#include "previewresultpdf.h"
+#include "previewresultplaintext.h"
+
+bool IPCPreviewClient::connect()
+{
+	if(socket->state() == QLocalSocket::ConnectedState)
+	{
+		socket->disconnectFromServer();
+		if(socket->state() == QLocalSocket::ConnectedState)
+		{
+			socket->waitForDisconnected(100);
+		}
+	}
+	socket->connectToServer(socketPath);
+	socket->waitForConnected(100);
+	return socket->state() == QLocalSocket::ConnectedState;
+}
+
+QSharedPointer<PreviewResult> IPCPreviewClient::deserialize(QByteArray &array)
+{
+	QDataStream stream{&array, QIODevice::ReadOnly};
+
+	PreviewResultType type;
+	stream >> type;
+	if(type == PreviewResultType::PDF)
+	{
+		return PreviewResultPdf::deserialize(array);
+	}
+	if(type == PreviewResultType::PlainText)
+	{
+		return PreviewResultPlainText::deserialize(array);
+	}
+	return QSharedPointer<PreviewResult>(nullptr);
+}
+
+IPCPreviewClient::IPCPreviewClient()
+{
+	this->socket = new QLocalSocket(this);
+}
+
+void IPCPreviewClient::setSocketPath(QString socketPath)
+{
+	this->socketPath = socketPath;
+}
+
+void IPCPreviewClient::startGeneration(RenderConfig config, const QVector<RenderTarget> &targets)
+{
+	this->start(config, targets);
+}
+
+void IPCPreviewClient::start(RenderConfig config, const QVector<RenderTarget> &targets)
+{
+	if(targets.count() == 0)
+	{
+		return;
+	}
+
+	if(!connect() || !socket->isOpen())
+	{
+		emit error("Could not connect to IPC worker");
+		return;
+	}
+
+	if(socket->isOpen() && socket->isWritable())
+	{
+		QDataStream stream(socket);
+		stream << GeneratePreviews;
+		stream << config;
+		stream << targets;
+		socket->flush();
+
+		int numTarget = 0;
+		if(socket->isOpen() && socket->isReadable() && socket->state() == QLocalSocket::ConnectedState)
+		{
+			do
+			{
+				socket->waitForReadyRead(100);
+				stream.startTransaction();
+				stream >> numTarget;
+			} while(!stream.commitTransaction() && socket->state() == QLocalSocket::ConnectedState);
+			if(numTarget != targets.count())
+			{
+				emit error("IPC Error: Server reports less targets than it should");
+				return;
+			}
+		}
+		else
+		{
+			emit error("Error while trying to process previews: " + socket->errorString());
+			return;
+		}
+
+		int processed = 0;
+		++this->currentPreviewGeneration;
+		while(socket->isOpen() && socket->isReadable() && processed < targets.count())
+		{
+			QByteArray array;
+			do
+			{
+				socket->waitForReadyRead(100);
+				stream.startTransaction();
+				stream >> array;
+			} while(!stream.commitTransaction() && socket->state() == QLocalSocket::ConnectedState);
+			emit previewReceived(deserialize(array), this->currentPreviewGeneration);
+			++processed;
+		}
+		if(processed != targets.count())
+		{
+			emit error("IPC worker didn't send enough previews. This is a bug, please report");
+		}
+	}
+	socket->disconnectFromServer();
+	emit finished();
+}
+
+void IPCPreviewClient::stopGeneration()
+{
+	if(!connect() || !socket->isOpen())
+	{
+		emit error("Could not connect to IPC worker");
+		return;
+	}
+	QDataStream stream(socket);
+	stream << StopGeneratePreviews;
+	socket->flush();
+}

gui/ipcpreviewclient.h

@@ -0,0 +1,37 @@
+#ifndef IPCPREVIEWCLIENT_H
+#define IPCPREVIEWCLIENT_H
+#include <QObject>
+#include <QLocalSocket>
+#include "previewresult.h"
+#include "renderconfig.h"
+#include "rendertarget.h"
+
+class IPCPreviewClient : public QObject
+{
+	Q_OBJECT
+  private:
+	unsigned int currentPreviewGeneration = 1;
+	QLocalSocket *socket;
+	QString socketPath;
+
+	bool connect();
+	QSharedPointer<PreviewResult> deserialize(QByteArray &array);
+
+  public:
+	IPCPreviewClient();
+	~IPCPreviewClient()
+	{
+		delete socket;
+	}
+	void setSocketPath(QString socketPath);
+  public slots:
+	void start(RenderConfig config, const QVector<RenderTarget> &targets);
+	void startGeneration(RenderConfig config, const QVector<RenderTarget> &targets);
+	void stopGeneration();
+  signals:
+	void previewReceived(QSharedPointer<PreviewResult> previewResult, unsigned int currentPreviewGeneration);
+	void finished();
+	void error(QString);
+};
+
+#endif // IPCPREVIEWCLIENT_H

gui/ipcpreviewworker.cpp

@@ -0,0 +1,24 @@
+#include <QtConcurrent>
+#include "ipcpreviewworker.h"
+#include "previewgeneratormapfunctor.h"
+IPCPreviewWorker::IPCPreviewWorker()
+{
+	this->connect(&previewWorkerWatcher, &QFutureWatcher<QByteArray>::resultReadyAt, this,
+				  [this](int index) { emit previewGenerated(previewWorkerWatcher.resultAt(index)); });
+	connect(&previewWorkerWatcher, &QFutureWatcher<QByteArray>::finished, this, [this] { emit finished(); });
+}
+
+void IPCPreviewWorker::start(RenderConfig config, const QVector<RenderTarget> &targets, QLocalSocket *peer)
+{
+	stop();
+	auto mapFunctor = PreviewGeneratorMapFunctor();
+	mapFunctor.setRenderConfig(config);
+
+	previewWorkerWatcher.setFuture(QtConcurrent::mapped(targets, mapFunctor));
+}
+
+void IPCPreviewWorker::stop()
+{
+	previewWorkerWatcher.cancel();
+	previewWorkerWatcher.waitForFinished();
+}

gui/ipcpreviewworker.h

@@ -0,0 +1,24 @@
+#ifndef IPCPREVIEWWORKER_H
+#define IPCPREVIEWWORKER_H
+#include <QLocalSocket>
+#include <QFutureWatcher>
+#include "renderconfig.h"
+#include "rendertarget.h"
+#include "previewgenerator.h"
+
+class IPCPreviewWorker : public QObject
+{
+	Q_OBJECT
+  private:
+	QFutureWatcher<QByteArray> previewWorkerWatcher;
+
+  public:
+	IPCPreviewWorker();
+	void start(RenderConfig config, const QVector<RenderTarget> &targets, QLocalSocket *peer);
+	void stop();
+  signals:
+	void previewGenerated(QByteArray);
+	void finished();
+};
+
+#endif // IPCPREVIEWWORKER_H

gui/ipcserver.cpp

@@ -6,10 +6,20 @@
 #include <QLocalSocket>
 #include <QDataStream>
 #include "ipcserver.h"
+#include "common.h"
+#include "databasefactory.h"
+#include "../shared/logger.h"
+#include "renderconfig.h"
+#include "rendertarget.h"
+#include "ipcpreviewworker.h"
 
 IpcServer::IpcServer()
 {
+	/* Only 1, we are doing work for the GUI, not a service for general availability */
+	this->spawningServer.setMaxPendingConnections(1);
 	connect(&this->spawningServer, &QLocalServer::newConnection, this, &IpcServer::spawnerNewConnection);
+	connect(&this->previewWorker, &IPCPreviewWorker::previewGenerated, this, &IpcServer::handlePreviewGenerated);
+	connect(&this->previewWorker, &IPCPreviewWorker::finished, this, [this] { this->currentSocket->flush(); });
 }
 
 bool IpcServer::startSpawner(QString socketPath)
@@ -18,71 +28,46 @@ bool IpcServer::startSpawner(QString socketPath)
 	return this->spawningServer.listen(socketPath);
 }
 
-bool IpcServer::docOpen(QString path, int pagenum)
-{
-	QSettings settings;
-	QString command = settings.value("pdfviewer").toString();
-	if(command != "" && command.contains("%p") && command.contains("%f"))
-	{
-		QStringList splitted = command.split(" ");
-		if(splitted.size() > 1)
-		{
-			QString cmd = splitted[0];
-			QStringList args = splitted.mid(1);
-			args.replaceInStrings("%f", path);
-			args.replaceInStrings("%p", QString::number(pagenum));
-
-			QProcess::startDetached(cmd, args);
-		}
-	}
-	else
-	{
-		QDesktopServices::openUrl(QUrl::fromLocalFile(path));
-	}
-	return true;
-}
-
-bool IpcServer::fileOpen(QString path)
-{
-	return QDesktopServices::openUrl(QUrl::fromLocalFile(path));
-}
-
 void IpcServer::spawnerNewConnection()
 {
-	QScopedPointer<QLocalSocket> socket{this->spawningServer.nextPendingConnection()};
-	if(!socket.isNull())
+	QLocalSocket *socket = this->spawningServer.nextPendingConnection();
+	connect(socket, &QLocalSocket::disconnected, socket, &QLocalSocket::deleteLater);
+	this->currentSocket = socket;
+	if(socket != nullptr)
 	{
 		if(!socket->waitForReadyRead())
 		{
 			return;
 		}
-		QDataStream stream(socket.get());
+		QDataStream stream(socket);
 		IPCCommand command;
-		QStringList args;
 		stream >> command;
-		stream >> args;
-		if(args.size() < 1)
+		if(command == GeneratePreviews)
 		{
-			stream << "invalid";
-			return;
-		}
-		if(command == DocOpen)
-		{
-			if(args.size() < 2)
+			RenderConfig renderConfig;
+			QVector<RenderTarget> targets;
+			do
 			{
-				stream << "invalid";
-				return;
-			}
-			docOpen(args[0], args[1].toInt());
+				/* TODO: this is not entirely robust */
+				socket->waitForReadyRead(100);
+				stream.startTransaction();
+				stream >> renderConfig >> targets;
+			} while(!stream.commitTransaction() && socket->state() == QLocalSocket::ConnectedState);
+
+			stream << targets.count();
+			socket->flush();
+			previewWorker.start(renderConfig, targets, socket);
 		}
-		if(command == FileOpen)
+		if(command == StopGeneratePreviews)
 		{
-			if(args.size() < 1)
-			{
-				stream << "invalid";
-				return;
-			}
-			fileOpen(args[0]);
+			previewWorker.stop();
 		}
 	}
 }
+
+void IpcServer::handlePreviewGenerated(QByteArray ba)
+{
+	QDataStream stream{this->currentSocket};
+	stream << ba;
+	this->currentSocket->flush();
+}

gui/ipcserver.h

@@ -3,15 +3,20 @@
 #include <QString>
 #include <QLocalServer>
 #include "ipc.h"
+#include "filesaver.h"
+#include "ipcpreviewworker.h"
+
 class IpcServer : public QObject
 {
 	Q_OBJECT
   private:
+	IPCPreviewWorker previewWorker;
 	QLocalServer spawningServer;
-	bool docOpen(QString path, int pagenum);
-	bool fileOpen(QString path);
+	QLocalSocket *currentSocket = nullptr;
+	SaveFileResult addFile(QString file);
   private slots:
 	void spawnerNewConnection();
+	void handlePreviewGenerated(QByteArray ba);
 
   public:
 	IpcServer();

gui/main.cpp

@@ -5,54 +5,41 @@
 #include <QProcess>
 #include <QDir>
 #include <QCommandLineParser>
+#include <QFileInfo>
 
 #include "mainwindow.h"
 #include "searchresult.h"
 #include "previewresultpdf.h"
 #include "../shared/common.h"
+#include "../shared/sandboxedprocessor.h"
 #include "../submodules/exile.h/exile.h"
 #include "ipcserver.h"
 
-void enableSandbox(QString socketPath)
+void enableIpcSandbox()
 {
-	struct exile_policy *policy = exile_init_policy();
+	struct exile_policy *policy = exile_create_policy();
 	if(policy == NULL)
 	{
 		qCritical() << "Failed to init policy for sandbox";
 		exit(EXIT_FAILURE);
 	}
-	QDir dir;
-	dir.mkpath(QStandardPaths::writableLocation(QStandardPaths::AppLocalDataLocation));
-	dir.mkpath(QStandardPaths::writableLocation(QStandardPaths::CacheLocation));
+	policy->namespace_options = EXILE_UNSHARE_USER | EXILE_UNSHARE_MOUNT | EXILE_UNSHARE_NETWORK;
+	policy->no_new_privs = 1;
+	policy->drop_caps = 1;
+	policy->vow_promises =
+		exile_vows_from_str("thread cpath wpath rpath unix stdio prot_exec proc shm fsnotify ioctl error");
+	policy->mount_path_policies_to_chroot = 1;
 
-	std::string appDataLocation = QStandardPaths::writableLocation(QStandardPaths::AppLocalDataLocation).toStdString();
-	std::string cacheDataLocation = QStandardPaths::writableLocation(QStandardPaths::CacheLocation).toStdString();
+	QString ipcSocketPath = Common::ipcSocketPath();
+	QFileInfo info{ipcSocketPath};
+	QString ipcSocketPathDir = info.absolutePath();
+	std::string stdIpcSocketPath = ipcSocketPathDir.toStdString();
 
-	std::string sockPath = socketPath.toStdString();
-	policy->namespace_options = EXILE_UNSHARE_NETWORK | EXILE_UNSHARE_USER;
-	policy->vow_promises = EXILE_SYSCALL_VOW_THREAD | EXILE_SYSCALL_VOW_CPATH | EXILE_SYSCALL_VOW_WPATH |
-						   EXILE_SYSCALL_VOW_RPATH | EXILE_SYSCALL_VOW_UNIX | EXILE_SYSCALL_VOW_STDIO |
-						   EXILE_SYSCALL_VOW_PROT_EXEC | EXILE_SYSCALL_VOW_PROC | EXILE_SYSCALL_VOW_SHM |
-						   EXILE_SYSCALL_VOW_FSNOTIFY | EXILE_SYSCALL_VOW_IOCTL;
-
-	if(exile_append_path_policy(policy, EXILE_FS_ALLOW_ALL_READ | EXILE_FS_ALLOW_REMOVE_FILE, "/") != 0)
-	{
-		qCritical() << "Failed to append a path to the path policy";
-		exit(EXIT_FAILURE);
-	}
-
-	if(exile_append_path_policy(policy, EXILE_FS_ALLOW_ALL_READ | EXILE_FS_ALLOW_ALL_WRITE, appDataLocation.c_str()) !=
-	   0)
-	{
-		qCritical() << "Failed to append a path to the path policy";
-		exit(EXIT_FAILURE);
-	}
-	if(exile_append_path_policy(policy, EXILE_FS_ALLOW_ALL_READ | EXILE_FS_ALLOW_ALL_WRITE,
-								cacheDataLocation.c_str()) != 0)
-	{
-		qCritical() << "Failed to append a path to the path policy";
-		exit(EXIT_FAILURE);
-	}
+	/* ALLOW_EXEC is needed for fallback, not in landlock mode. It does not allow executing anything though here
+	 * due to the vows */
+	exile_append_path_policies(policy, EXILE_FS_ALLOW_ALL_READ | EXILE_FS_ALLOW_EXEC, "/");
+	exile_append_path_policies(policy, EXILE_FS_ALLOW_ALL_READ | EXILE_FS_ALLOW_ALL_WRITE | EXILE_FS_ALLOW_EXEC,
+							   stdIpcSocketPath.c_str());
 	int ret = exile_enable_policy(policy);
 	if(ret != 0)
 	{
@@ -61,32 +48,71 @@ void enableSandbox(QString socketPath)
 	}
 	exile_free_policy(policy);
 }
+
 int main(int argc, char *argv[])
 {
-	QString socketPath = "/tmp/looqs-spawner";
+	QString socketPath = Common::ipcSocketPath();
 	if(argc > 1)
 	{
 		QString arg = argv[1];
 		if(arg == "ipc")
 		{
 			Common::setupAppInfo();
+			if(Common::noSandboxModeRequested())
+			{
+				qInfo() << "Launching with no sandbox!" << Qt::endl;
+			}
+			else
+			{
+				enableIpcSandbox();
+			}
 			QApplication a(argc, argv);
 
 			IpcServer *ipcserver = new IpcServer();
 			qDebug() << "Launching IPC Server";
 			if(!ipcserver->startSpawner(socketPath))
 			{
-				qCritical() << "Error failed to spawn";
+				qCritical() << "Error failed to spawn" << Qt::endl;
 				return 1;
 			}
 			qDebug() << "Launched IPC Server";
 			return a.exec();
 		}
+		if(arg == "process")
+		{
+			Common::setupAppInfo();
+			QCoreApplication a(argc, argv);
+
+			QStringList args = a.arguments();
+			if(args.length() < 3)
+			{
+				qDebug() << "Filename is required";
+				return 1;
+			}
+
+			QString file = args.at(2);
+			SandboxedProcessor processor(file);
+			return processor.process();
+		}
 	}
+	QString ipcSocketPath = Common::ipcSocketPath();
+	QFileInfo info{ipcSocketPath};
+	QString ipcSocketPathDir = info.absolutePath();
+
+	QDir dir;
+	if(!dir.mkpath(ipcSocketPathDir))
+	{
+		qCritical() << "Failed to create dir for ipc socket" << Qt::endl;
+		exit(EXIT_FAILURE);
+	}
+
 	QProcess process;
 	QStringList args;
 	args << "ipc";
-	if(!process.startDetached("/proc/self/exe", args))
+	process.setProcessChannelMode(QProcess::ForwardedChannels);
+
+	process.start("/proc/self/exe", args);
+	if(!process.waitForStarted(5000))
 	{
 		QString errorMsg = "Failed to start IPC server";
 		qDebug() << errorMsg;
@@ -102,17 +128,6 @@ int main(int argc, char *argv[])
 	}
 	parser.parse(appArgs);
 
-	if(!parser.isSet("no-sandbox"))
-	{
-		enableSandbox(socketPath);
-		qInfo() << "Sandbox: on";
-	}
-	else
-	{
-		qInfo() << "Sandbox: off";
-	}
-	// Keep this post sandbox, afterwards does not work (suspect due to threads, but unconfirmed)
-	QApplication a(argc, argv);
 	try
 	{
 		Common::ensureConfigured();
@@ -123,13 +138,20 @@ int main(int argc, char *argv[])
 		QMessageBox::critical(nullptr, "Error", e.message);
 		return 1;
 	}
+	QApplication a(argc, argv);
+	a.setWindowIcon(QIcon(":/looqs.svg"));
+	QObject::connect(&a, &QApplication::aboutToQuit, &process, &QProcess::kill);
+
 	qRegisterMetaType<QVector<SearchResult>>("QVector<SearchResult>");
 	qRegisterMetaType<QVector<PreviewResultPdf>>("QVector<PreviewResultPdf>");
 	qRegisterMetaType<PreviewResultPdf>("PreviewResultPdf");
-
-	IPCClient client{socketPath};
-	MainWindow w{0, client};
-	w.showMaximized();
-
-	return a.exec();
+	qRegisterMetaType<FileScanResult>("FileScanResult");
+	qRegisterMetaType<RenderConfig>("RenderConfig");
+	qRegisterMetaType<QVector<RenderTarget>>("QVector<RenderTarget>");
+	qRegisterMetaType<QSharedPointer<PreviewResult>>("QSharedPointer<PreviewResult>");
+	MainWindow *w = new MainWindow{0, socketPath};
+	w->showMaximized();
+	int ret = a.exec();
+	process.waitForFinished(1000);
+	return ret;
 }

gui/mainwindow.cpp

@@ -11,27 +11,59 @@
 #include <QProcess>
 #include <QComboBox>
 #include <QtConcurrent/QtConcurrent>
+#include <QMessageBox>
+#include <QFileDialog>
+#include <QScreen>
+#include <QProgressDialog>
 #include "mainwindow.h"
 #include "ui_mainwindow.h"
 #include "clicklabel.h"
 #include "../shared/sqlitesearch.h"
 #include "../shared/looqsgeneralexception.h"
 #include "../shared/common.h"
+#include "ipcpreviewclient.h"
+#include "previewgenerator.h"
 
-MainWindow::MainWindow(QWidget *parent, IPCClient &client) : QMainWindow(parent), ui(new Ui::MainWindow)
+MainWindow::MainWindow(QWidget *parent, QString socketPath)
+	: QMainWindow(parent), ui(new Ui::MainWindow), progressDialog(this)
 {
+	this->progressDialog.cancel(); // because constructing it shows it, quite weird
 	ui->setupUi(this);
 	setWindowTitle(QCoreApplication::applicationName());
-	this->ipcClient = &client;
+	this->ipcPreviewClient.moveToThread(&this->ipcClientThread);
+	this->ipcPreviewClient.setSocketPath(socketPath);
+
+	connect(&ipcPreviewClient, &IPCPreviewClient::previewReceived, this, &MainWindow::previewReceived,
+			Qt::QueuedConnection);
+	connect(&ipcPreviewClient, &IPCPreviewClient::finished, this,
+			[&]
+			{
+				this->ui->previewProcessBar->setValue(this->ui->previewProcessBar->maximum());
+				this->ui->spinPreviewPage->setEnabled(true);
+			});
+	connect(&ipcPreviewClient, &IPCPreviewClient::error, this,
+			[this](QString msg)
+			{
+				qCritical() << msg << Qt::endl;
+				QMessageBox::critical(this, "IPC error", msg);
+			});
+
+	connect(this, &MainWindow::startIpcPreviews, &ipcPreviewClient, &IPCPreviewClient::startGeneration,
+			Qt::QueuedConnection);
+	connect(this, &MainWindow::stopIpcPreviews, &ipcPreviewClient, &IPCPreviewClient::stopGeneration,
+			Qt::QueuedConnection);
+	this->ipcClientThread.start();
 	QSettings settings;
 
-	db = QSqlDatabase::addDatabase("QSQLITE");
-	db.setDatabaseName(Common::databasePath());
-	if(!db.open())
-	{
-		qDebug() << "failed to open database";
-		throw std::runtime_error("Failed to open database");
-	}
+	this->dbFactory = new DatabaseFactory(Common::databasePath());
+
+	db = this->dbFactory->forCurrentThread();
+	this->dbService = new SqliteDbService(*this->dbFactory);
+	this->indexSyncer = new IndexSyncer(*this->dbService);
+	this->indexSyncer->moveToThread(&this->syncerThread);
+
+	indexer = new Indexer(*(this->dbService));
+	indexer->setParent(this);
 	connectSignals();
 	ui->treeResultsList->setContextMenuPolicy(Qt::ContextMenuPolicy::CustomContextMenu);
 	ui->tabWidget->setCurrentIndex(0);
@@ -41,6 +73,33 @@ MainWindow::MainWindow(QWidget *parent, IPCClient &client) : QMainWindow(parent)
 	ui->comboScale->setCurrentText(settings.value("currentScale").toString());
 	previewsPerPage = settings.value("previewsPerPage", 20).toInt();
 	ui->spinPreviewPage->setMinimum(1);
+
+	QStringList indexPaths = settings.value("indexPaths").toStringList();
+	ui->lstPaths->addItems(indexPaths);
+
+	QString ignorePatterns = settings.value("ignorePatterns").toString();
+	ui->txtIgnorePatterns->setText(ignorePatterns);
+
+	ui->spinPreviewPage->setValue(1);
+	ui->spinPreviewPage->setMinimum(1);
+}
+
+void MainWindow::addPathToIndex()
+{
+	QString path = this->ui->txtPathScanAdd->text();
+	QFileInfo fileInfo{path};
+	if(!fileInfo.exists(path))
+	{
+		QMessageBox::critical(this, "Invalid path", "Path does not seem to exist");
+		return;
+	}
+	if(!fileInfo.isReadable())
+	{
+		QMessageBox::critical(this, "Invalid path", "Path cannot be read");
+		return;
+	}
+	this->ui->lstPaths->addItem(path);
+	this->ui->txtPathScanAdd->clear();
 }
 
 void MainWindow::connectSignals()
@@ -60,10 +119,6 @@ void MainWindow::connectSignals()
 					handleSearchError(e.message);
 				}
 			});
-	connect(&previewWorkerWatcher, &QFutureWatcher<QSharedPointer<PreviewResult>>::resultReadyAt, this,
-			[&](int index) { previewReceived(previewWorkerWatcher.resultAt(index)); });
-	connect(&previewWorkerWatcher, &QFutureWatcher<QSharedPointer<PreviewResult>>::progressValueChanged,
-			ui->previewProcessBar, &QProgressBar::setValue);
 	connect(ui->treeResultsList, &QTreeWidget::itemActivated, this, &MainWindow::treeSearchItemActivated);
 	connect(ui->treeResultsList, &QTreeWidget::customContextMenuRequested, this,
 			&MainWindow::showSearchResultsContextMenu);
@@ -71,24 +126,190 @@ void MainWindow::connectSignals()
 	connect(ui->comboScale, qOverload<int>(&QComboBox::currentIndexChanged), this, &MainWindow::comboScaleChanged);
 	connect(ui->spinPreviewPage, qOverload<int>(&QSpinBox::valueChanged), this,
 			&MainWindow::spinPreviewPageValueChanged);
+
+	connect(ui->btnAddPath, &QPushButton::clicked, this, &MainWindow::addPathToIndex);
+	connect(ui->txtPathScanAdd, &QLineEdit::returnPressed, this, &MainWindow::addPathToIndex);
+	connect(ui->btnStartIndexing, &QPushButton::clicked, this, &MainWindow::startIndexing);
+
+	connect(this->indexer, &Indexer::pathsCountChanged, this,
+			[&](int number)
+			{
+				ui->lblSearchResults->setText("Found paths: " + QString::number(number));
+				ui->lblPathsFoundValue->setText(QString::number(number));
+				ui->previewProcessBar->setMaximum(number);
+			});
+	connect(this->indexer, &Indexer::indexProgress, this,
+
+			[&](int number, unsigned int added, unsigned int skipped, unsigned int failed, unsigned int totalCount)
+			{
+				ui->lblSearchResults->setText("Processed " + QString::number(number) + " files");
+				ui->previewProcessBar->setValue(number);
+				ui->previewProcessBar->setMaximum(totalCount);
+				ui->lblAddedValue->setText(QString::number(added));
+				ui->lblSkippedValue->setText(QString::number(skipped));
+				ui->lblFailedValue->setText(QString::number(failed));
+			});
+
+	connect(this->indexer, &Indexer::finished, this, &MainWindow::finishIndexing);
+
+	connect(ui->lstPaths->selectionModel(), &QItemSelectionModel::selectionChanged, this,
+			[&](const QItemSelection &selected, const QItemSelection &deselected)
+			{ ui->btnDeletePath->setEnabled(this->ui->lstPaths->selectedItems().count() > 0); });
+
+	connect(ui->btnDeletePath, &QPushButton::clicked, this, [&] { qDeleteAll(ui->lstPaths->selectedItems()); });
+	connect(ui->btnChoosePath, &QPushButton::clicked, this,
+			[&]
+			{
+				QFileDialog dialog(nullptr);
+				dialog.setFileMode(QFileDialog::Directory);
+				dialog.setOptions(QFileDialog::ShowDirsOnly);
+				if(dialog.exec())
+				{
+					auto paths = dialog.selectedFiles();
+					if(paths.size() == 1)
+					{
+						ui->lstPaths->addItem(paths[0]);
+					}
+				}
+			});
+	connect(
+		ui->menuAboutAction, &QAction::triggered, this,
+		[this](bool checked)
+		{
+			QString html = "<h2>looqs</h2>";
+			html += "Full-text search with previews for your files<br><br>";
+			html += "Copyright (c) 2018-2022: Albert Schwarzkopf<br><br>";
+			html += QString("Version: %1<br><br>").arg(Common::versionText());
+			html += "Contact: looqs at quitesimple dot org<br><br>";
+			html += "Website: <a href=\"https://quitesimple.org\">https://quitesimple.org</a><br><br>";
+			html +=
+				"Source code: <a "
+				"href=\"https://github.com/quitesimpleorg/looqs\">https://github.com/quitesimpleorg/looqs</a><br><br>";
+			html += "License: GPLv3<br><br><br>";
+			html += "looqs is open source and free of charge in the hope it will be useful. The author(s) do not "
+					"give any warranty. In the unlikely event of any damage, the author(s) cannot be held responsible. "
+					"You are using looqs at your own risk";
+
+			QMessageBox::about(this, "About looqs", html);
+		});
+	connect(ui->menuOpenConfigInTextEditorAction, &QAction::triggered, this,
+			[this](bool checked)
+			{
+				QSettings setting;
+				QDesktopServices::openUrl(setting.fileName());
+			});
+	connect(ui->menuAboutQtAction, &QAction::triggered, this,
+			[this](bool checked) { QMessageBox::aboutQt(this, "About Qt"); });
+	connect(ui->menuSyncIndexAction, &QAction::triggered, this, &MainWindow::startIndexSync);
+	connect(indexSyncer, &IndexSyncer::finished, this,
+			[&](unsigned int totalUpdated, unsigned int totalDeleted, unsigned int totalErrored)
+			{
+				this->progressDialog.cancel();
+
+				QMessageBox::information(
+					this, "Syncing finished",
+					QString("Syncing finished\n\nTotal updated: %1\nTotal deleted: %2\nTotal errors: %3\n")
+						.arg(QString::number(totalUpdated))
+						.arg(QString::number(totalDeleted))
+						.arg(QString::number(totalErrored)));
+			});
+	connect(this, &MainWindow::beginIndexSync, indexSyncer, &IndexSyncer::sync);
+	connect(&this->progressDialog, &QProgressDialog::canceled, indexSyncer, &IndexSyncer::cancel);
 }
 
+void MainWindow::startIndexSync()
+{
+	progressDialog.setWindowTitle("Syncing");
+	progressDialog.setLabelText("Syncing - this might take a moment, please wait");
+	progressDialog.setWindowModality(Qt::ApplicationModal);
+	progressDialog.setMinimum(0);
+	progressDialog.setMaximum(0);
+	progressDialog.setValue(0);
+	progressDialog.open();
+
+	indexSyncer->setKeepGoing(true);
+	indexSyncer->setVerbose(false);
+	indexSyncer->setDryRun(false);
+	indexSyncer->setRemoveDeletedFromIndex(true);
+
+	this->syncerThread.start();
+
+	emit beginIndexSync();
+}
 void MainWindow::spinPreviewPageValueChanged(int val)
 {
 	makePreviews(val);
 }
 
+void MainWindow::startIndexing()
+{
+	if(this->indexer->isRunning())
+	{
+		ui->btnStartIndexing->setEnabled(false);
+		ui->btnStartIndexing->setText("Start indexing");
+		this->indexer->requestCancellation();
+		return;
+	}
+
+	ui->previewsTab->setEnabled(false);
+	ui->resultsTab->setEnabled(false);
+	ui->txtPathScanAdd->setEnabled(false);
+	ui->txtSearch->setEnabled(false);
+	ui->previewProcessBar->setValue(0);
+	ui->previewProcessBar->setVisible(true);
+
+	QVector<QString> paths;
+	QStringList pathSettingsValue;
+	for(int i = 0; i < ui->lstPaths->count(); i++)
+	{
+		QString path = ui->lstPaths->item(i)->text();
+		paths.append(path);
+		pathSettingsValue.append(path);
+	}
+	this->indexer->setTargetPaths(paths);
+	QString ignorePatterns = ui->txtIgnorePatterns->text();
+	this->indexer->setIgnorePattern(ignorePatterns.split(";"));
+	this->indexer->beginIndexing();
+	QSettings settings;
+	settings.setValue("indexPaths", pathSettingsValue);
+	settings.setValue("ignorePatterns", ignorePatterns);
+	ui->btnStartIndexing->setText("Stop indexing");
+}
+
+void MainWindow::finishIndexing()
+{
+	IndexResult result = this->indexer->getResult();
+
+	ui->lblSearchResults->setText("Indexing finished");
+	ui->previewProcessBar->setValue(ui->previewProcessBar->maximum());
+	ui->lblFailedValue->setText(QString::number(result.erroredPaths));
+	ui->lblSkippedValue->setText(QString::number(result.skippedPaths));
+	ui->lblAddedValue->setText(QString::number(result.addedPaths));
+	ui->btnStartIndexing->setEnabled(true);
+	ui->btnStartIndexing->setText("Start indexing");
+	ui->previewsTab->setEnabled(true);
+	ui->resultsTab->setEnabled(true);
+	ui->txtPathScanAdd->setEnabled(true);
+	ui->txtSearch->setEnabled(true);
+}
+
 void MainWindow::comboScaleChanged(int i)
 {
 	QSettings scaleSetting;
 	scaleSetting.setValue("currentScale", ui->comboScale->currentText());
 	makePreviews(ui->spinPreviewPage->value());
 }
+
 bool MainWindow::previewTabActive()
 {
 	return ui->tabWidget->currentIndex() == 1;
 }
 
+bool MainWindow::indexerTabActive()
+{
+	return ui->tabWidget->currentIndex() == 2;
+}
+
 void MainWindow::keyPressEvent(QKeyEvent *event)
 {
 	bool quit =
@@ -112,30 +333,41 @@ void MainWindow::keyPressEvent(QKeyEvent *event)
 
 void MainWindow::tabChanged()
 {
+	if(ui->tabWidget->currentIndex() == 0)
+	{
+		ui->previewProcessBar->hide();
+	}
+	else
+	{
+		if(ui->previewProcessBar->value() > 0)
+		{
+			ui->previewProcessBar->show();
+		}
+	}
 	if(previewTabActive())
 	{
 		if(previewDirty)
 		{
 			makePreviews(ui->spinPreviewPage->value());
 		}
-		ui->previewProcessBar->show();
-	}
-	else
-	{
-		ui->previewProcessBar->hide();
 	}
 }
 
-void MainWindow::previewReceived(QSharedPointer<PreviewResult> preview)
+void MainWindow::previewReceived(QSharedPointer<PreviewResult> preview, unsigned int previewGeneration)
 {
-	if(preview->hasPreview())
+	if(previewGeneration < this->currentPreviewGeneration)
+	{
+		return;
+	}
+	this->ui->previewProcessBar->setValue(this->ui->previewProcessBar->value() + 1);
+	if(!preview.isNull() && preview->hasPreview())
 	{
 		QString docPath = preview->getDocumentPath();
 		auto previewPage = preview->getPage();
 
 		ClickLabel *label = dynamic_cast<ClickLabel *>(preview->createPreviewWidget());
 		ui->scrollAreaWidgetContents->layout()->addWidget(label);
-		connect(label, &ClickLabel::leftClick, [this, docPath, previewPage]() { ipcDocOpen(docPath, previewPage); });
+		connect(label, &ClickLabel::leftClick, [this, docPath, previewPage]() { openDocument(docPath, previewPage); });
 		connect(label, &ClickLabel::rightClick,
 				[this, docPath, previewPage]()
 				{
@@ -157,7 +389,12 @@ void MainWindow::lineEditReturnPressed()
 		ui->lblSearchResults->setText("Invalid paranthesis");
 		return;
 	}
+	if(indexerTabActive())
+	{
+		ui->tabWidget->setCurrentIndex(0);
+	}
 	// TODO: validate q;
+	ui->treeResultsList->clear();
 	ui->lblSearchResults->setText("Searching...");
 	this->ui->txtSearch->setEnabled(false);
 	QFuture<QVector<SearchResult>> searchFuture = QtConcurrent::run(
@@ -174,10 +411,20 @@ void MainWindow::lineEditReturnPressed()
 			if(addPathSearch)
 			{
 				LooqsQuery filesQuery = LooqsQuery::build(q, TokenType::FILTER_PATH_CONTAINS, false);
+				if(filesQuery.getLimit() == -1)
+				{
+					filesQuery.setLimit(1000);
+				}
+
 				results.append(searcher.search(filesQuery));
 			}
 			if(addContentSearch)
 			{
+				if(this->contentSearchQuery.getLimit() == -1)
+				{
+					this->contentSearchQuery.setLimit(1000);
+				}
+
 				results.append(searcher.search(this->contentSearchQuery));
 			}
 			return results;
@@ -207,9 +454,12 @@ void MainWindow::handleSearchResults(const QVector<SearchResult> &results)
 		bool exists = pathInfo.exists();
 		if(exists)
 		{
-			if(result.fileData.absPath.endsWith(".pdf"))
+			if(!pathInfo.suffix().contains("htm")) // hack until we can preview them properly...
 			{
-				this->previewableSearchResults.append(result);
+				if(PreviewGenerator::get(pathInfo) != nullptr)
+				{
+					this->previewableSearchResults.append(result);
+				}
 			}
 		}
 		else
@@ -219,12 +469,11 @@ void MainWindow::handleSearchResults(const QVector<SearchResult> &results)
 	}
 	ui->treeResultsList->resizeColumnToContents(0);
 	ui->treeResultsList->resizeColumnToContents(1);
+	ui->treeResultsList->resizeColumnToContents(2);
 	previewDirty = !this->previewableSearchResults.empty();
 
-	int numpages = ceil(static_cast<double>(this->previewableSearchResults.size()) / previewsPerPage);
-	ui->spinPreviewPage->setMinimum(1);
-	ui->spinPreviewPage->setMaximum(numpages);
 	ui->spinPreviewPage->setValue(1);
+
 	if(previewTabActive() && previewDirty)
 	{
 		makePreviews(1);
@@ -233,19 +482,17 @@ void MainWindow::handleSearchResults(const QVector<SearchResult> &results)
 	QString statusText = "Results: " + QString::number(results.size()) + " files";
 	if(hasDeleted)
 	{
-		statusText += " WARNING: Some files don't exist anymore. No preview available for those. Index out of sync";
+		statusText += " WARNING: Some files are inaccessible. No preview available for those. Index may be out of sync";
 	}
 	ui->lblSearchResults->setText(statusText);
 }
 
 void MainWindow::makePreviews(int page)
 {
-
-	this->previewWorkerWatcher.cancel();
-	this->previewWorkerWatcher.waitForFinished();
-
-	QCoreApplication::processEvents(); // Maybe not necessary anymore, depends on whether it's possible that a slot is
-									   // still to be fired.
+	if(this->previewableSearchResults.empty())
+	{
+		return;
+	}
 	qDeleteAll(ui->scrollAreaWidgetContents->children());
 
 	ui->scrollAreaWidgetContents->setLayout(new QHBoxLayout());
@@ -255,7 +502,7 @@ void MainWindow::makePreviews(int page)
 	scaleText.chop(1);
 
 	QVector<QString> wordsToHighlight;
-	QRegularExpression extractor(R"#("([^"]*)"|(\w+))#");
+	QRegularExpression extractor(R"#("([^"]*)"|(\p{L}+))#");
 	for(const Token &token : this->contentSearchQuery.getTokens())
 	{
 		if(token.type == FILTER_CONTENT_CONTAINS)
@@ -273,13 +520,43 @@ void MainWindow::makePreviews(int page)
 			}
 		}
 	}
-	PreviewWorker worker;
 	int end = previewsPerPage;
 	int begin = page * previewsPerPage - previewsPerPage;
-	this->previewWorkerWatcher.setFuture(worker.generatePreviews(this->previewableSearchResults.mid(begin, end),
-																 wordsToHighlight, scaleText.toInt() / 100.));
-	ui->previewProcessBar->setMaximum(this->previewWorkerWatcher.progressMaximum());
-	ui->previewProcessBar->setMinimum(this->previewWorkerWatcher.progressMinimum());
+	if(begin < 0)
+	{
+		// Should not happen actually
+		begin = 0;
+	}
+
+	RenderConfig renderConfig;
+	renderConfig.scaleX = QGuiApplication::primaryScreen()->physicalDotsPerInchX() * (scaleText.toInt() / 100.);
+	renderConfig.scaleY = QGuiApplication::primaryScreen()->physicalDotsPerInchY() * (scaleText.toInt() / 100.);
+	renderConfig.wordsToHighlight = wordsToHighlight;
+
+	QVector<RenderTarget> targets;
+	for(SearchResult &sr : this->previewableSearchResults)
+	{
+		RenderTarget renderTarget;
+		renderTarget.path = sr.fileData.absPath;
+
+		for(unsigned int pagenum : sr.pages)
+		{
+			renderTarget.page = (int)pagenum;
+			targets.append(renderTarget);
+		}
+	}
+	int numpages = ceil(static_cast<double>(targets.size()) / previewsPerPage);
+	ui->spinPreviewPage->setMaximum(numpages);
+	targets = targets.mid(begin, end);
+
+	ui->lblTotalPreviewPagesCount->setText(QString::number(numpages));
+	ui->previewProcessBar->setMaximum(targets.count());
+	ui->previewProcessBar->setMinimum(0);
+	ui->previewProcessBar->setValue(0);
+	ui->previewProcessBar->setVisible(this->previewableSearchResults.size() > 0);
+	++this->currentPreviewGeneration;
+	this->ui->spinPreviewPage->setEnabled(false);
+	emit startIpcPreviews(renderConfig, targets);
 }
 
 void MainWindow::handleSearchError(QString error)
@@ -293,27 +570,39 @@ void MainWindow::createSearchResutlMenu(QMenu &menu, const QFileInfo &fileInfo)
 				   [&fileInfo] { QGuiApplication::clipboard()->setText(fileInfo.fileName()); });
 	menu.addAction("Copy full path to clipboard",
 				   [&fileInfo] { QGuiApplication::clipboard()->setText(fileInfo.absoluteFilePath()); });
-	menu.addAction("Open containing folder", [this, &fileInfo] { this->ipcFileOpen(fileInfo.absolutePath()); });
+	menu.addAction("Open containing folder", [this, &fileInfo] { this->openFile(fileInfo.absolutePath()); });
 }
 
-void MainWindow::ipcDocOpen(QString path, int num)
+void MainWindow::openDocument(QString path, int num)
 {
-	QStringList args;
-	args << path;
-	args << QString::number(num);
-	this->ipcClient->sendCommand(DocOpen, args);
+	QSettings settings;
+	QString command = settings.value("pdfviewer").toString();
+	if(path.endsWith(".pdf") && command != "" && command.contains("%p") && command.contains("%f"))
+	{
+		QStringList splitted = command.split(" ");
+		if(splitted.size() > 1)
+		{
+			QString cmd = splitted[0];
+			QStringList args = splitted.mid(1);
+			args.replaceInStrings("%f", path);
+			args.replaceInStrings("%p", QString::number(num));
+			QProcess::startDetached(cmd, args);
+		}
+	}
+	else
+	{
+		QDesktopServices::openUrl(QUrl::fromLocalFile(path));
+	}
 }
 
-void MainWindow::ipcFileOpen(QString path)
+void MainWindow::openFile(QString path)
 {
-	QStringList args;
-	args << path;
-	this->ipcClient->sendCommand(FileOpen, args);
+	QDesktopServices::openUrl(QUrl::fromLocalFile(path));
 }
 
 void MainWindow::treeSearchItemActivated(QTreeWidgetItem *item, int i)
 {
-	ipcFileOpen(item->text(1));
+	openFile(item->text(1));
 }
 
 void MainWindow::showSearchResultsContextMenu(const QPoint &point)
@@ -331,5 +620,11 @@ void MainWindow::showSearchResultsContextMenu(const QPoint &point)
 
 MainWindow::~MainWindow()
 {
+	syncerThread.terminate();
+	ipcClientThread.terminate();
+	delete this->indexSyncer;
+	delete this->dbService;
+	delete this->dbFactory;
+	delete this->indexer;
 	delete ui;
 }

gui/mainwindow.h

@@ -9,9 +9,11 @@
 #include <QFutureWatcher>
 #include <QSqlDatabase>
 #include <QLocalSocket>
-#include "previewworker.h"
+#include <QProgressDialog>
 #include "../shared/looqsquery.h"
-#include "ipcclient.h"
+#include "../shared/indexsyncer.h"
+#include "ipcpreviewclient.h"
+#include "indexer.h"
 namespace Ui
 {
 class MainWindow;
@@ -22,25 +24,33 @@ class MainWindow : public QMainWindow
 	Q_OBJECT
 
   public:
-	explicit MainWindow(QWidget *parent, IPCClient &client);
+	explicit MainWindow(QWidget *parent, QString socketPath);
 	~MainWindow();
   signals:
 	void beginSearch(const QString &query);
 	void startPdfPreviewGeneration(QVector<SearchResult> paths, double scalefactor);
 
   private:
+	DatabaseFactory *dbFactory;
+	SqliteDbService *dbService;
 	Ui::MainWindow *ui;
-	IPCClient *ipcClient;
+	IPCPreviewClient ipcPreviewClient;
+	QThread ipcClientThread;
+	QThread syncerThread;
+	IndexSyncer *indexSyncer;
+	QProgressDialog progressDialog;
+
+	Indexer *indexer;
 	QFileIconProvider iconProvider;
 	bool previewDirty;
 	QSqlDatabase db;
 	QFutureWatcher<QVector<SearchResult>> searchWatcher;
-	QFutureWatcher<QSharedPointer<PreviewResult>> previewWorkerWatcher;
 	void add(QString path, unsigned int page);
 	QVector<SearchResult> previewableSearchResults;
 	void connectSignals();
 	void makePreviews(int page);
 	bool previewTabActive();
+	bool indexerTabActive();
 	void keyPressEvent(QKeyEvent *event) override;
 	unsigned int processedPdfPreviews;
 	void handleSearchResults(const QVector<SearchResult> &results);
@@ -48,17 +58,26 @@ class MainWindow : public QMainWindow
 	LooqsQuery contentSearchQuery;
 	int previewsPerPage;
 	void createSearchResutlMenu(QMenu &menu, const QFileInfo &fileInfo);
-	void ipcDocOpen(QString path, int num);
-	void ipcFileOpen(QString path);
-
+	void openDocument(QString path, int num);
+	void openFile(QString path);
+	unsigned int currentPreviewGeneration = 1;
   private slots:
 	void lineEditReturnPressed();
 	void treeSearchItemActivated(QTreeWidgetItem *item, int i);
 	void showSearchResultsContextMenu(const QPoint &point);
 	void tabChanged();
-	void previewReceived(QSharedPointer<PreviewResult> preview);
+	void previewReceived(QSharedPointer<PreviewResult> preview, unsigned int previewGeneration);
 	void comboScaleChanged(int i);
 	void spinPreviewPageValueChanged(int val);
+	void startIndexing();
+	void finishIndexing();
+	void addPathToIndex();
+	void startIndexSync();
+
+  signals:
+	void startIpcPreviews(RenderConfig config, const QVector<RenderTarget> &targets);
+	void stopIpcPreviews();
+	void beginIndexSync();
 };
 
 #endif // MAINWINDOW_H

gui/mainwindow.ui

@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>1221</width>
-    <height>614</height>
+    <height>709</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -27,7 +27,7 @@
        <enum>QTabWidget::South</enum>
       </property>
       <property name="currentIndex">
-       <number>1</number>
+       <number>0</number>
       </property>
       <widget class="QWidget" name="resultsTab">
        <attribute name="title">
@@ -82,7 +82,7 @@
              <x>0</x>
              <y>0</y>
              <width>1185</width>
-             <height>324</height>
+             <height>419</height>
             </rect>
            </property>
            <layout class="QHBoxLayout" name="horizontalLayout"/>
@@ -155,6 +155,13 @@
             </property>
            </widget>
           </item>
+          <item>
+           <widget class="QLabel" name="lblTotalPreviewPagesCount">
+            <property name="text">
+             <string/>
+            </property>
+           </widget>
+          </item>
           <item>
            <spacer name="horizontalSpacer">
             <property name="orientation">
@@ -172,6 +179,171 @@
         </item>
        </layout>
       </widget>
+      <widget class="QWidget" name="indexerTab">
+       <attribute name="title">
+        <string>Index</string>
+       </attribute>
+       <layout class="QGridLayout" name="gridLayout">
+        <item row="1" column="0">
+         <widget class="QGroupBox" name="groupBoxPaths">
+          <property name="title">
+           <string>Add paths to scan</string>
+          </property>
+          <layout class="QGridLayout" name="gridLayout_2">
+           <item row="1" column="0">
+            <widget class="QLineEdit" name="txtPathScanAdd"/>
+           </item>
+           <item row="3" column="0" colspan="5">
+            <widget class="QListWidget" name="lstPaths"/>
+           </item>
+           <item row="1" column="3">
+            <widget class="QToolButton" name="btnDeletePath">
+             <property name="enabled">
+              <bool>false</bool>
+             </property>
+             <property name="text">
+              <string>Delete</string>
+             </property>
+            </widget>
+           </item>
+           <item row="1" column="1">
+            <widget class="QPushButton" name="btnChoosePath">
+             <property name="text">
+              <string>...</string>
+             </property>
+            </widget>
+           </item>
+           <item row="1" column="2">
+            <widget class="QPushButton" name="btnAddPath">
+             <property name="text">
+              <string>Add</string>
+             </property>
+            </widget>
+           </item>
+          </layout>
+         </widget>
+        </item>
+        <item row="5" column="0">
+         <widget class="QLabel" name="label">
+          <property name="text">
+           <string>Ignore patterns, separated by ';'. Example: *.js;*Downloads*</string>
+          </property>
+         </widget>
+        </item>
+        <item row="9" column="0">
+         <widget class="QGroupBox" name="groupBoxIndexProgress">
+          <property name="contextMenuPolicy">
+           <enum>Qt::PreventContextMenu</enum>
+          </property>
+          <property name="title">
+           <string>Index Progress</string>
+          </property>
+          <layout class="QVBoxLayout" name="verticalLayout_4">
+           <item>
+            <layout class="QHBoxLayout" name="horizontalLayout_7">
+             <item>
+              <widget class="QLabel" name="lblPathsFound">
+               <property name="text">
+                <string>Paths found:</string>
+               </property>
+              </widget>
+             </item>
+             <item>
+              <widget class="QLabel" name="lblPathsFoundValue">
+               <property name="text">
+                <string/>
+               </property>
+              </widget>
+             </item>
+            </layout>
+           </item>
+           <item>
+            <layout class="QHBoxLayout" name="horizontalLayout_4">
+             <item>
+              <widget class="QLabel" name="lblAdded">
+               <property name="font">
+                <font>
+                 <weight>50</weight>
+                 <bold>false</bold>
+                </font>
+               </property>
+               <property name="text">
+                <string>Added:</string>
+               </property>
+              </widget>
+             </item>
+             <item>
+              <widget class="QLabel" name="lblAddedValue">
+               <property name="text">
+                <string/>
+               </property>
+              </widget>
+             </item>
+            </layout>
+           </item>
+           <item>
+            <layout class="QHBoxLayout" name="horizontalLayout_5">
+             <item>
+              <widget class="QLabel" name="lblSkipped">
+               <property name="font">
+                <font>
+                 <weight>50</weight>
+                 <bold>false</bold>
+                </font>
+               </property>
+               <property name="text">
+                <string>Skipped:</string>
+               </property>
+              </widget>
+             </item>
+             <item>
+              <widget class="QLabel" name="lblSkippedValue">
+               <property name="text">
+                <string/>
+               </property>
+              </widget>
+             </item>
+            </layout>
+           </item>
+           <item>
+            <layout class="QHBoxLayout" name="horizontalLayout_6">
+             <item>
+              <widget class="QLabel" name="lblFailed">
+               <property name="font">
+                <font>
+                 <weight>50</weight>
+                 <bold>false</bold>
+                </font>
+               </property>
+               <property name="text">
+                <string>Failed:</string>
+               </property>
+              </widget>
+             </item>
+             <item>
+              <widget class="QLabel" name="lblFailedValue">
+               <property name="text">
+                <string/>
+               </property>
+              </widget>
+             </item>
+            </layout>
+           </item>
+          </layout>
+         </widget>
+        </item>
+        <item row="6" column="0">
+         <widget class="QLineEdit" name="txtIgnorePatterns"/>
+        </item>
+        <item row="10" column="0">
+         <widget class="QPushButton" name="btnStartIndexing">
+          <property name="text">
+           <string>Start indexing</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </widget>
      </widget>
     </item>
     <item>
@@ -184,12 +356,13 @@
     <item>
      <widget class="QProgressBar" name="previewProcessBar">
       <property name="value">
-       <number>24</number>
+       <number>0</number>
       </property>
      </widget>
     </item>
    </layout>
   </widget>
+  <widget class="QStatusBar" name="statusBar"/>
   <widget class="QMenuBar" name="menuBar">
    <property name="geometry">
     <rect>
@@ -199,8 +372,38 @@
      <height>35</height>
     </rect>
    </property>
+   <widget class="QMenu" name="menulooqs">
+    <property name="title">
+     <string>looqs</string>
+    </property>
+    <addaction name="menuOpenConfigInTextEditorAction"/>
+    <addaction name="menuSyncIndexAction"/>
+    <addaction name="menuAboutAction"/>
+    <addaction name="menuAboutQtAction"/>
+    <addaction name="separator"/>
+   </widget>
+   <addaction name="menulooqs"/>
   </widget>
-  <widget class="QStatusBar" name="statusBar"/>
+  <action name="menuAboutAction">
+   <property name="text">
+    <string>About</string>
+   </property>
+  </action>
+  <action name="menuOpenConfigInTextEditorAction">
+   <property name="text">
+    <string>Open config in text editor</string>
+   </property>
+  </action>
+  <action name="menuAboutQtAction">
+   <property name="text">
+    <string>About Qt</string>
+   </property>
+  </action>
+  <action name="menuSyncIndexAction">
+   <property name="text">
+    <string>Sync index (remove deleted, update existing files)</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <resources/>

gui/previewgenerator.cpp

@@ -1 +1,24 @@
+#include "../shared/common.h"
 #include "previewgenerator.h"
+#include "previewgeneratorpdf.h"
+#include "previewgeneratorplaintext.h"
+
+static PreviewGenerator *plainTextGenerator = new PreviewGeneratorPlainText();
+
+static QMap<QString, PreviewGenerator *> generators{
+	{"pdf", new PreviewGeneratorPdf()}, {"txt", plainTextGenerator},  {"md", plainTextGenerator},
+	{"py", plainTextGenerator},			{"java", plainTextGenerator}, {"js", plainTextGenerator},
+	{"cpp", plainTextGenerator},		{"c", plainTextGenerator},	  {"sql", plainTextGenerator}};
+
+PreviewGenerator *PreviewGenerator::get(QFileInfo &info)
+{
+	PreviewGenerator *result = generators.value(info.suffix(), nullptr);
+	if(result == nullptr)
+	{
+		if(Common::isTextFile(info))
+		{
+			return plainTextGenerator;
+		}
+	}
+	return result;
+}

gui/previewgenerator.h

@@ -2,16 +2,19 @@
 #define PREVIEWGENERATOR_H
 #include <QVector>
 #include <QSharedPointer>
+#include <QFileInfo>
 #include "previewresult.h"
 #include "renderconfig.h"
 
 class PreviewGenerator
 {
   public:
-	virtual PreviewResult *generate(RenderConfig config, QString documentPath, unsigned int page) = 0;
+	virtual QSharedPointer<PreviewResult> generate(RenderConfig config, QString documentPath, unsigned int page) = 0;
 	virtual ~PreviewGenerator()
 	{
 	}
+
+	static PreviewGenerator *get(QFileInfo &info);
 };
 
 #endif // PREVIEWGENERATOR_H

gui/previewgeneratormapfunctor.cpp

@@ -3,26 +3,6 @@
 
 PreviewGeneratorMapFunctor::PreviewGeneratorMapFunctor()
 {
-	generator[GeneratorIndex::PDF] = new PreviewGeneratorPdf();
-}
-
-PreviewGenerator *PreviewGeneratorMapFunctor::getGenerator(QString filePath)
-{
-	/* Dirty, but that's all we have at this point */
-	if(filePath.endsWith(".pdf"))
-	{
-		return generator[GeneratorIndex::PDF];
-	}
-	return nullptr;
-}
-
-PreviewGeneratorMapFunctor::~PreviewGeneratorMapFunctor()
-{
-	for(int i = GeneratorIndex::PDF; i < GeneratorIndex::LAST_DUMMY; i++)
-	{
-		// delete generator[i];
-		generator[i] = nullptr;
-	}
 }
 
 void PreviewGeneratorMapFunctor::setRenderConfig(RenderConfig config)
@@ -30,15 +10,15 @@ void PreviewGeneratorMapFunctor::setRenderConfig(RenderConfig config)
 	this->renderConfig = config;
 }
 
-QSharedPointer<PreviewResult> PreviewGeneratorMapFunctor::operator()(const QSharedPointer<PreviewResult> &renderResult)
+QByteArray PreviewGeneratorMapFunctor::operator()(const RenderTarget &renderTarget)
 {
-	PreviewGenerator *previewGenerator = getGenerator(renderResult->getDocumentPath());
+	QFileInfo info{renderTarget.path};
+	PreviewGenerator *previewGenerator = PreviewGenerator::get(info);
 	if(previewGenerator == nullptr)
 	{
-		return QSharedPointer<PreviewResult>();
+		return QByteArray{};
 	}
-	auto preview =
-		previewGenerator->generate(this->renderConfig, renderResult->getDocumentPath(), renderResult->getPage());
+	auto preview = previewGenerator->generate(this->renderConfig, renderTarget.path, renderTarget.page);
 
-	return QSharedPointer<PreviewResult>(preview);
+	return preview->serialize();
 }

gui/previewgeneratormapfunctor.h

@@ -2,8 +2,9 @@
 #define PREVIEWGENERATORMAPFUNCTOR_H
 
 #include "renderconfig.h"
-#include "previewgenerator.h"
+#include "rendertarget.h"
 
+#include "previewgenerator.h"
 class PreviewGeneratorMapFunctor
 {
 
@@ -14,19 +15,15 @@ class PreviewGeneratorMapFunctor
 		LAST_DUMMY
 	};
 	RenderConfig renderConfig;
-	PreviewGenerator *generator[LAST_DUMMY];
-	PreviewGenerator *getGenerator(QString filePath);
 
   public:
-	typedef QSharedPointer<PreviewResult> result_type;
+	typedef QByteArray result_type;
 
 	PreviewGeneratorMapFunctor();
 
-	~PreviewGeneratorMapFunctor();
-
 	void setRenderConfig(RenderConfig config);
 
-	QSharedPointer<PreviewResult> operator()(const QSharedPointer<PreviewResult> &renderResult);
+	QByteArray operator()(const RenderTarget &renderTarget);
 };
 
 #endif // PREVIEWGENERATORMAPFUNCTOR_H

gui/previewgeneratorpdf.cpp

@@ -1,6 +1,5 @@
 #include <QMutexLocker>
 #include <QPainter>
-
 #include "previewgeneratorpdf.h"
 
 static QMutex cacheMutex;
@@ -24,18 +23,18 @@ Poppler::Document *PreviewGeneratorPdf::document(QString path)
 	return result;
 }
 
-PreviewResult *PreviewGeneratorPdf::generate(RenderConfig config, QString documentPath, unsigned int page)
+QSharedPointer<PreviewResult> PreviewGeneratorPdf::generate(RenderConfig config, QString documentPath,
+															unsigned int page)
 {
 	PreviewResultPdf *result = new PreviewResultPdf(documentPath, page);
-
 	Poppler::Document *doc = document(documentPath);
 	if(doc == nullptr)
 	{
-		return result;
+		return QSharedPointer<PreviewResult>(result);
 	}
 	if(doc->isLocked())
 	{
-		return result;
+		return QSharedPointer<PreviewResult>(result);
 	}
 	int p = (int)page - 1;
 	if(p < 0)
@@ -55,5 +54,5 @@ PreviewResult *PreviewGeneratorPdf::generate(RenderConfig config, QString docume
 		}
 	}
 	result->previewImage = img;
-	return result;
+	return QSharedPointer<PreviewResult>(result);
 }

gui/previewgeneratorpdf.h

@@ -13,7 +13,7 @@ class PreviewGeneratorPdf : public PreviewGenerator
   public:
 	using PreviewGenerator::PreviewGenerator;
 
-	PreviewResult *generate(RenderConfig config, QString documentPath, unsigned int page);
+	QSharedPointer<PreviewResult> generate(RenderConfig config, QString documentPath, unsigned int page);
 
 	~PreviewGeneratorPdf()
 	{

gui/previewgeneratorplaintext.cpp

@@ -0,0 +1,90 @@
+#include <QTextStream>
+
+#include "previewgeneratorplaintext.h"
+#include "previewresultplaintext.h"
+
+QSharedPointer<PreviewResult> PreviewGeneratorPlainText::generate(RenderConfig config, QString documentPath,
+																  unsigned int page)
+{
+	PreviewResultPlainText *result = new PreviewResultPlainText(documentPath, page);
+	QFile file(documentPath);
+	if(!file.open(QFile::ReadOnly | QFile::Text))
+	{
+		return QSharedPointer<PreviewResultPlainText>(result);
+	}
+	QTextStream in(&file);
+
+	QString resulText = "";
+	QString content = in.readAll();
+	QMap<int, QString> snippet;
+
+	int coveredRange = 0;
+
+	int lastWordPos = 0;
+	QHash<QString, int> countmap;
+
+	const unsigned int maxSnippets = 7;
+	unsigned int currentSnippets = 0;
+	for(QString &word : config.wordsToHighlight)
+	{
+
+		int lastPos = 0;
+		int index = content.indexOf(word, lastPos, Qt::CaseInsensitive);
+		while(index != -1 && currentSnippets < maxSnippets)
+		{
+			countmap[word] = countmap.value(word, 0) + 1;
+
+			if(index >= lastWordPos && index <= coveredRange)
+			{
+				break;
+			}
+			int begin = index - 50;
+			if(begin < 0)
+			{
+				begin = 0;
+			}
+			int after = index + 50;
+			if(after > content.size())
+			{
+				after = content.size();
+			}
+
+			snippet[index] = "...<br>" + content.mid(begin, after) + "...<br>";
+			coveredRange = after;
+			lastPos = index;
+
+			index = content.indexOf(word, lastPos + 1, Qt::CaseInsensitive);
+			++currentSnippets;
+		}
+		lastWordPos = lastPos;
+	}
+
+	auto i = snippet.constBegin();
+	while(i != snippet.constEnd())
+	{
+		resulText.append(i.value());
+		++i;
+	}
+
+	for(QString &word : config.wordsToHighlight)
+	{
+		resulText.replace(word, "<span style=\"background-color: yellow;\">" + word + "</span>", Qt::CaseInsensitive);
+	}
+
+	QFileInfo info{documentPath};
+
+	QString header = "<b>" + info.fileName() + "</b> ";
+	for(QString &word : config.wordsToHighlight)
+	{
+		header += word + ": " + QString::number(countmap[word]) + " ";
+	}
+	if(currentSnippets == maxSnippets)
+	{
+		header += "(truncated)";
+	}
+
+	header += "<hr>";
+
+	result->setText(header + resulText.replace("\n", "<br>").mid(0, 1000));
+	return QSharedPointer<PreviewResultPlainText>(result);
+}

gui/previewgeneratorplaintext.h

@@ -0,0 +1,12 @@
+#ifndef PREVIEWGENERATORPLAINTEXT_H
+#define PREVIEWGENERATORPLAINTEXT_H
+#include "previewgenerator.h"
+
+class PreviewGeneratorPlainText : public PreviewGenerator
+{
+  public:
+	using PreviewGenerator::PreviewGenerator;
+	QSharedPointer<PreviewResult> generate(RenderConfig config, QString documentPath, unsigned int page);
+};
+
+#endif // PREVIEWGENERATORPLAINTEXT_H

gui/previewresult.cpp

@@ -1,5 +1,4 @@
 #include "previewresult.h"
-
 PreviewResult::PreviewResult()
 {
 }
@@ -33,3 +32,11 @@ unsigned int PreviewResult::getPage() const
 {
 	return this->page;
 }
+
+QByteArray PreviewResult::serialize() const
+{
+	QByteArray result;
+	QDataStream stream{&result, QIODevice::WriteOnly};
+	stream << 0 << this->documentPath << this->page;
+	return result;
+}

gui/previewresult.h

@@ -2,6 +2,12 @@
 #define PREVIEWRESULT_H
 #include "clicklabel.h"
 
+enum PreviewResultType
+{
+	PDF = 1,
+	PlainText
+};
+
 class PreviewResult
 {
   protected:
@@ -17,6 +23,7 @@ class PreviewResult
 	virtual bool hasPreview();
 	QString getDocumentPath() const;
 	unsigned int getPage() const;
+	virtual QByteArray serialize() const;
 };
 
 #endif // PREVIEWRESULT_H

gui/previewresultpdf.cpp

@@ -1,5 +1,4 @@
 #include "previewresultpdf.h"
-
 PreviewResultPdf::PreviewResultPdf(const PreviewResult &o)
 {
 	this->documentPath = o.getDocumentPath();
@@ -19,3 +18,27 @@ bool PreviewResultPdf::hasPreview()
 	bool result = !this->previewImage.isNull();
 	return result;
 }
+
+QByteArray PreviewResultPdf::serialize() const
+{
+	QByteArray result;
+	QDataStream stream{&result, QIODevice::WriteOnly};
+	PreviewResultType type = PreviewResultType::PDF;
+	stream << type << this->documentPath << this->page << this->previewImage;
+	return result;
+}
+
+QSharedPointer<PreviewResultPdf> PreviewResultPdf::deserialize(QByteArray &ba)
+{
+	PreviewResultPdf *result = new PreviewResultPdf();
+	PreviewResultType type;
+
+	QDataStream stream{&ba, QIODevice::ReadOnly};
+	stream >> type;
+	if(type != PreviewResultType::PDF)
+	{
+		throw std::runtime_error("Invalid byte array: Not a pdf preview");
+	}
+	stream >> result->documentPath >> result->page >> result->previewImage;
+	return QSharedPointer<PreviewResultPdf>(result);
+}

gui/previewresultpdf.h

@@ -12,6 +12,10 @@ class PreviewResultPdf : public PreviewResult
 
 	QWidget *createPreviewWidget() override;
 	bool hasPreview() override;
+
+	QByteArray serialize() const;
+
+	static QSharedPointer<PreviewResultPdf> deserialize(QByteArray &ba);
 };
 
 #endif // PREVIEWRESULTPDF_H

gui/previewresultplaintext.cpp

@@ -0,0 +1,54 @@
+#include "previewresultplaintext.h"
+
+PreviewResultPlainText::PreviewResultPlainText(const PreviewResult &o)
+{
+	this->documentPath = o.getDocumentPath();
+	this->page = o.getPage();
+}
+
+QWidget *PreviewResultPlainText::createPreviewWidget()
+{
+
+	ClickLabel *label = new ClickLabel();
+	label->setText(this->text);
+	label->setToolTip(getDocumentPath());
+	label->setStyleSheet("border: 1px solid black");
+	label->setMaximumWidth(768);
+	label->setMaximumHeight(512);
+	label->setTextFormat(Qt::RichText);
+	return label;
+}
+
+bool PreviewResultPlainText::hasPreview()
+{
+	return !text.isEmpty();
+}
+
+void PreviewResultPlainText::setText(QString text)
+{
+	this->text = text;
+}
+
+QByteArray PreviewResultPlainText::serialize() const
+{
+	QByteArray result;
+	QDataStream stream{&result, QIODevice::WriteOnly};
+	PreviewResultType type = PreviewResultType::PlainText;
+	stream << type << this->documentPath << this->page << this->text;
+	return result;
+}
+
+QSharedPointer<PreviewResultPlainText> PreviewResultPlainText::deserialize(QByteArray &ba)
+{
+	PreviewResultPlainText *result = new PreviewResultPlainText();
+	PreviewResultType type;
+
+	QDataStream stream{&ba, QIODevice::ReadOnly};
+	stream >> type;
+	if(type != PreviewResultType::PlainText)
+	{
+		throw std::runtime_error("Invalid byte array: Not a pdf preview");
+	}
+	stream >> result->documentPath >> result->page >> result->text;
+	return QSharedPointer<PreviewResultPlainText>(result);
+}

gui/previewresultplaintext.h

@@ -0,0 +1,23 @@
+#ifndef PREVIEWRESULTPLAINTEXT_H
+#define PREVIEWRESULTPLAINTEXT_H
+#include "previewresult.h"
+
+class PreviewResultPlainText : public PreviewResult
+{
+  private:
+	QString text;
+
+  public:
+	using PreviewResult::PreviewResult;
+	PreviewResultPlainText(const PreviewResult &o);
+
+	QWidget *createPreviewWidget() override;
+	bool hasPreview() override;
+
+	void setText(QString text);
+
+	QByteArray serialize() const;
+	static QSharedPointer<PreviewResultPlainText> deserialize(QByteArray &ba);
+};
+
+#endif // PREVIEWRESULTPLAINTEXT_H

gui/previewworker.cpp

@@ -1,39 +0,0 @@
-#include <QApplication>
-#include <QScreen>
-#include <QScopedPointer>
-#include <QMutexLocker>
-#include <QtConcurrent/QtConcurrent>
-#include <QtConcurrent/QtConcurrentMap>
-#include <atomic>
-#include "previewworker.h"
-
-PreviewWorker::PreviewWorker()
-{
-}
-
-QFuture<QSharedPointer<PreviewResult>> PreviewWorker::generatePreviews(const QVector<SearchResult> paths,
-																	   QVector<QString> wordsToHighlight,
-																	   double scalefactor)
-{
-	QVector<QSharedPointer<PreviewResult>> previews;
-
-	for(const SearchResult &sr : paths)
-	{
-		for(unsigned int page : sr.pages)
-		{
-			QSharedPointer<PreviewResult> ptr =
-				QSharedPointer<PreviewResult>(new PreviewResult{sr.fileData.absPath, page});
-			previews.append(ptr);
-		}
-	}
-
-	RenderConfig renderConfig;
-	renderConfig.scaleX = QGuiApplication::primaryScreen()->physicalDotsPerInchX() * scalefactor;
-	renderConfig.scaleY = QGuiApplication::primaryScreen()->physicalDotsPerInchY() * scalefactor;
-	renderConfig.wordsToHighlight = wordsToHighlight;
-
-	auto mapFunctor = new PreviewGeneratorMapFunctor();
-	mapFunctor->setRenderConfig(renderConfig);
-
-	return QtConcurrent::mapped(previews, *mapFunctor);
-}

gui/previewworker.h

@@ -1,29 +0,0 @@
-#ifndef PREVIEWWORKER_H
-#define PREVIEWWORKER_H
-#include <QObject>
-#include <QImage>
-#include <QHash>
-#include <QThread>
-#include <QMutex>
-#include <QWaitCondition>
-#include <QMutex>
-#include <QFuture>
-#include "previewresultpdf.h"
-#include "searchresult.h"
-#include "previewgenerator.h"
-#include "previewworker.h"
-#include "previewgeneratorpdf.h"
-#include "previewgeneratormapfunctor.h"
-
-class PreviewWorker : public QObject
-{
-	Q_OBJECT
-  public:
-	PreviewWorker();
-	QSharedPointer<PreviewGenerator> createGenerator(QString path);
-
-	QFuture<QSharedPointer<PreviewResult>> generatePreviews(const QVector<SearchResult> paths,
-															QVector<QString> wordsToHighlight, double scalefactor);
-};
-
-#endif // PREVIEWWORKER_H

gui/renderconfig.cpp

@@ -0,0 +1,17 @@
+#include "renderconfig.h"
+
+QDataStream &operator<<(QDataStream &out, const RenderConfig &rc)
+{
+	out << rc.scaleX;
+	out << rc.scaleY;
+	out << rc.wordsToHighlight;
+	return out;
+}
+
+QDataStream &operator>>(QDataStream &in, RenderConfig &rc)
+{
+	in >> rc.scaleX;
+	in >> rc.scaleY;
+	in >> rc.wordsToHighlight;
+	return in;
+}

gui/renderconfig.h

@@ -1,12 +1,17 @@
 #ifndef RENDERCONFIG_H
 #define RENDERCONFIG_H
 #include <QVector>
+#include <QDataStream>
 
 struct RenderConfig
 {
 	double scaleX = 50 / 100.;
 	double scaleY = scaleX;
 	QVector<QString> wordsToHighlight;
+	friend QDataStream &operator<<(QDataStream &out, const RenderConfig &rc);
+	friend QDataStream &operator>>(QDataStream &in, RenderConfig &rc);
 };
 
+QDataStream &operator<<(QDataStream &out, const RenderConfig &rc);
+QDataStream &operator>>(QDataStream &in, RenderConfig &rc);
 #endif // RENDERCONFIG_H

gui/rendertarget.cpp

@@ -0,0 +1,14 @@
+#include <QDataStream>
+
+#include "rendertarget.h"
+QDataStream &operator<<(QDataStream &out, const RenderTarget &rc)
+{
+	out << rc.path << rc.page;
+	return out;
+}
+
+QDataStream &operator>>(QDataStream &in, RenderTarget &rc)
+{
+	in >> rc.path >> rc.page;
+	return in;
+}

gui/rendertarget.h

@@ -0,0 +1,15 @@
+#ifndef RENDERTARGET_H
+#define RENDERTARGET_H
+#include <QString>
+struct RenderTarget
+{
+  public:
+	QString path;
+	int page;
+	friend QDataStream &operator<<(QDataStream &out, const RenderTarget &rc);
+	friend QDataStream &operator>>(QDataStream &in, RenderTarget &rc);
+};
+
+QDataStream &operator<<(QDataStream &out, const RenderTarget &rc);
+QDataStream &operator>>(QDataStream &in, RenderTarget &rc);
+#endif // RENDERTARGET_H

looqs.desktop

@@ -0,0 +1,9 @@
+[Desktop Entry]
+Name=looqs
+Exec=looqs-gui
+Terminal=false
+Type=Application
+Icon=looqs
+StartupWMClass=looqs
+Comment=FTS desktop search with previews
+Categories=Qt;Utility;

shared/common.cpp

@@ -7,15 +7,23 @@
 #include <QSqlError>
 #include <QTextStream>
 #include <QDebug>
+#include <QMimeDatabase>
 #include "looqsgeneralexception.h"
 #include "common.h"
+#include "dbmigrator.h"
+#include "databasefactory.h"
+#include "logger.h"
 
 #define SETTINGS_KEY_DBPATH "dbpath"
 #define SETTINGS_KEY_FIRSTRUN "firstrun"
+#define SETTINGS_KEY_IPCSOCKETPATH "ipcsocketpath"
+#define SETTINGS_KEY_PDFVIEWER "pdfviewer"
+#define SETTINGS_KEY_EXCLUDEDPATHS "excludedpaths"
+#define SETTINGS_KEY_MOUNTPATHS "mountpaths"
 
 inline void initResources()
 {
-	Q_INIT_RESOURCE(create);
+	Q_INIT_RESOURCE(migrations);
 }
 
 bool Common::initSqliteDatabase(QString path)
@@ -28,31 +36,58 @@ bool Common::initSqliteDatabase(QString path)
 		return false;
 	}
 	initResources();
-	QFile file(":./create.sql");
-	if(!file.open(QIODevice::ReadOnly))
-	{
-		qDebug() << "Failed to load SQL creation script from embedded resource";
-		return false;
-	}
-	QTextStream stream(&file);
-	db.transaction();
-	while(!stream.atEnd())
-	{
-		QString sql = stream.readLine();
-		QSqlQuery sqlQuery;
-		if(!sqlQuery.exec(sql))
-		{
-			qDebug() << "Failed to execute sql statement while initializing database: " << sqlQuery.lastError();
-			db.rollback();
-			return false;
-		}
-	}
-	db.commit();
+	DBMigrator migrator{db};
+	migrator.performMigrations();
 	db.close();
-	file.close();
 	return true;
 }
 
+QString Common::findInPath(QString needle)
+{
+	QStringList results;
+	QString pathVar = QProcessEnvironment::systemEnvironment().value("PATH", "/usr/bin/:/bin/:");
+	QStringList paths = pathVar.split(":");
+	for(const QString &path : paths)
+	{
+		// TODO: can pass ../ but so be it for now.
+
+		QFileInfo info{path + "/" + needle};
+		if(info.exists())
+		{
+			return info.absoluteFilePath();
+		}
+	}
+	return "";
+}
+
+void Common::setPdfViewer()
+{
+	QString value;
+
+	/* TODO: well, we should query this probably from xdg*/
+	QString okularPath = findInPath("okular");
+	QString evincePath = findInPath("evince");
+	QString qpdfviewPath = findInPath("qpdfview");
+
+	if(okularPath != "")
+	{
+		value = okularPath + " %f -p %p";
+	}
+	else if(evincePath != "")
+	{
+		value = evincePath + "-i %p %f";
+	}
+	else if(qpdfviewPath != "")
+	{
+		value = qpdfviewPath + "%f#%p";
+	}
+
+	QSettings settings;
+	if(value != "")
+	{
+		settings.setValue(SETTINGS_KEY_PDFVIEWER, value);
+	}
+}
 void Common::ensureConfigured()
 {
 	QSettings settings;
@@ -73,8 +108,10 @@ void Common::ensureConfigured()
 		{
 			throw LooqsGeneralException("Failed to initialize sqlite database");
 		}
+
 		settings.setValue(SETTINGS_KEY_FIRSTRUN, false);
 		settings.setValue(SETTINGS_KEY_DBPATH, dbpath);
+		setPdfViewer();
 	}
 	else
 	{
@@ -84,6 +121,21 @@ void Common::ensureConfigured()
 		{
 			throw LooqsGeneralException("Database " + dbpath + " was not found");
 		}
+		DatabaseFactory factory{dbpath};
+		auto db = factory.forCurrentThread();
+		DBMigrator migrator{db};
+		if(migrator.migrationNeeded())
+		{
+			QFile out;
+			out.open(stderr, QIODevice::WriteOnly);
+			Logger migrationLogger{&out};
+			migrationLogger << "Database is being upgraded, please be patient..." << Qt::endl;
+			QObject::connect(&migrator, &DBMigrator::migrationDone,
+							 [&migrationLogger](uint32_t migration)
+							 { migrationLogger << "Progress: Successfully migrated to: " << migration << Qt::endl; });
+			migrator.performMigrations();
+			migrationLogger << "Database upgraded successfully" << Qt::endl;
+		}
 	}
 }
 
@@ -96,7 +148,7 @@ void Common::setupAppInfo()
 
 QString Common::databasePath()
 {
-	QString env = QProcessEnvironment::systemEnvironment().value("QSS_DB_OVERRIDE");
+	QString env = QProcessEnvironment::systemEnvironment().value("LOOQS_DB_OVERRIDE");
 	if(env == "")
 	{
 		QSettings settings;
@@ -104,3 +156,92 @@ QString Common::databasePath()
 	}
 	return env;
 }
+
+bool Common::noSandboxModeRequested()
+{
+	QString env = getenv("LOOQS_DISABLE_SANDBOX");
+	if(env == "1")
+	{
+		return true;
+	}
+	return false;
+}
+
+QString Common::ipcSocketPath()
+{
+	return "/tmp/.looqs/looqs-ipc-socket";
+
+	/* May not a good idea to set it in the settings and probably nobody would ever bother to change it anyway */
+	// QSettings settings;
+	// return settings.value(SETTINGS_KEY_IPCSOCKETPATH, "/tmp/.looqs/looqs-ipc-socket").toString();
+}
+
+static QStringList excludedPaths = {"/proc", "/sys", "/dev", "/tmp", "/var/run", "/run"};
+
+QStringList Common::excludedPaths()
+{
+	static int ran = false;
+	if(!ran)
+	{
+		QSettings settings;
+		QStringList userExcludedPaths = settings.value(SETTINGS_KEY_EXCLUDEDPATHS).toStringList();
+		ran = true;
+		::excludedPaths.append(userExcludedPaths);
+	}
+	return ::excludedPaths;
+}
+
+QStringList Common::mountPaths()
+{
+	static int ran = false;
+	static QStringList mountPaths;
+	if(!ran)
+	{
+		QSettings settings;
+		mountPaths = settings.value(SETTINGS_KEY_MOUNTPATHS, QStringList{"/media", "/mnt"}).toStringList();
+		ran = true;
+	}
+	return mountPaths;
+}
+
+bool Common::isMountPath(QString path)
+{
+	QStringList mountPaths = Common::mountPaths();
+	for(QString &mountPath : mountPaths)
+	{
+		if(path.startsWith(mountPath))
+		{
+			return true;
+		}
+	}
+	return false;
+}
+
+bool Common::isTextFile(QFileInfo fileInfo)
+{
+	/* TODO: This is not sandboxed yet ... */
+	QMimeDatabase mimeDatabase;
+	QMimeType mimeType = mimeDatabase.mimeTypeForFile(fileInfo);
+	if(mimeType.name().startsWith("text/"))
+	{
+		return true;
+	}
+	else
+	{
+		for(QString &str : mimeType.allAncestors())
+		{
+			if(str.startsWith("text/"))
+			{
+				return true;
+			}
+		}
+	}
+	return false;
+}
+
+QString Common::versionText()
+{
+	QString commitid = GIT_COMMIT_ID;
+	QString tag = GIT_TAG;
+	return tag + " (" + commitid + ") built " + __DATE__ + " " + __TIME__;
+}

shared/common.h

@@ -1,12 +1,21 @@
 #ifndef COMMON_H
 #define COMMON_H
 #include <QCoreApplication>
-
+#include <QFileInfo>
 namespace Common
 {
 void setupAppInfo();
 QString databasePath();
+QString ipcSocketPath();
+void setPdfViewer();
+QString findInPath(QString needle);
 bool initSqliteDatabase(QString path);
 void ensureConfigured();
+QStringList excludedPaths();
+QStringList mountPaths();
+bool isTextFile(QFileInfo fileInfo);
+bool isMountPath(QString path);
+bool noSandboxModeRequested();
+QString versionText();
 } // namespace Common
 #endif

shared/concurrentqueue.cpp

@@ -0,0 +1 @@
+#include "concurrentqueue.h"

shared/concurrentqueue.h

@@ -0,0 +1,66 @@
+#ifndef CONCURRENTQUEUE_H
+#define CONCURRENTQUEUE_H
+#include <QList>
+#include <QMutex>
+#include <QSemaphore>
+#define QUEUE_SIZE 10000
+template <class T> class ConcurrentQueue : protected QList<T>
+{
+  protected:
+	QMutex mutex;
+
+	QSemaphore avail{QUEUE_SIZE};
+
+  public:
+	void enqueue(const T &t)
+	{
+		avail.acquire(1);
+		QMutexLocker locker(&mutex);
+		QList<T>::append(t);
+	}
+
+	QVector<T> dequeue(int batchsize)
+	{
+		avail.release(batchsize);
+		// TODO: this sucks
+		QVector<T> result;
+		QMutexLocker locker(&mutex);
+		for(int i = 0; i < batchsize; i++)
+		{
+			result.append(QList<T>::takeFirst());
+		}
+		return result;
+	}
+
+	void enqueue(const QVector<T> &t)
+	{
+		QList<T> tmp(t.begin(), t.end());
+		avail.acquire(t.size());
+		QMutexLocker locker(&mutex);
+		QList<T>::append(tmp);
+	}
+
+	unsigned int remaining()
+	{
+		return QUEUE_SIZE - avail.available();
+	}
+
+	void clear()
+	{
+		QMutexLocker locker(&mutex);
+		QList<T>::clear();
+		avail.release(QUEUE_SIZE);
+	}
+
+	bool dequeue(T &result)
+	{
+		QMutexLocker locker(&mutex);
+		if(QList<T>::isEmpty())
+			return false;
+		avail.release(1);
+		result = QList<T>::takeFirst();
+		return true;
+	}
+};
+
+#endif // CONCURRENTQUEUE_H

shared/create.qrc

@@ -1,5 +0,0 @@
-<!DOCTYPE RCC><RCC version="1.0">
-<qresource>
-    <file>create.sql</file>
-</qresource>
-</RCC>

shared/databasefactory.cpp

@@ -1,6 +1,7 @@
 #include <QThread>
 #include "databasefactory.h"
 #include "logger.h"
+#include "looqsgeneralexception.h"
 DatabaseFactory::DatabaseFactory(QString connectionString)
 {
 	this->connectionString = connectionString;
@@ -11,7 +12,7 @@ static QThreadStorage<QSqlDatabase> dbStore;
 QSqlDatabase DatabaseFactory::createNew()
 {
 	static int counter = 0;
-	QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE", "QSS" + QString::number(counter++));
+	QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE", "LOOQS" + QString::number(counter++));
 	db.setDatabaseName(this->connectionString);
 	if(!db.open())
 	{
@@ -28,7 +29,7 @@ QSqlDatabase DatabaseFactory::forCurrentThread()
 		return dbStore.localData();
 	}
 	QSqlDatabase db =
-		QSqlDatabase::addDatabase("QSQLITE", "QSS" + QString::number((quint64)QThread::currentThread(), 16));
+		QSqlDatabase::addDatabase("QSQLITE", "LOOQS" + QString::number((quint64)QThread::currentThread(), 16));
 	db.setDatabaseName(this->connectionString);
 	if(!db.open())
 	{

shared/databasefactory.h

@@ -2,7 +2,6 @@
 #define DATABASEFACTORY_H
 #include <QSqlDatabase>
 #include <QThreadStorage>
-#include "utils.h"
 class DatabaseFactory
 {
   private:

shared/dbmigrator.cpp

@@ -0,0 +1,85 @@
+#include <QDirIterator>
+#include <QSqlQuery>
+#include <QSqlError>
+#include <QTextStream>
+#include <QDebug>
+#include "dbmigrator.h"
+#include "looqsgeneralexception.h"
+
+DBMigrator::DBMigrator(QSqlDatabase &db)
+{
+	Q_INIT_RESOURCE(migrations);
+	this->db = &db;
+}
+
+DBMigrator::~DBMigrator()
+{
+	Q_CLEANUP_RESOURCE(migrations);
+}
+
+QStringList DBMigrator::getMigrationFilenames()
+{
+	QStringList result;
+	QDirIterator it(":/looqs-migrations/");
+	while(it.hasNext())
+	{
+		result.append(it.next());
+	}
+	return result;
+}
+
+uint32_t DBMigrator::currentRevision()
+{
+	QSqlQuery dbquery(*db);
+	dbquery.exec("PRAGMA user_version;");
+	if(!dbquery.next())
+	{
+		throw new LooqsGeneralException("Failed to query current db revision");
+	}
+	uint32_t result = dbquery.value(0).toUInt();
+	return result;
+}
+
+bool DBMigrator::migrationNeeded()
+{
+	QStringList migrations = getMigrationFilenames();
+	uint32_t currentRev = currentRevision();
+
+	return currentRev < static_cast<uint32_t>(migrations.size());
+}
+
+void DBMigrator::performMigrations()
+{
+	QStringList migrations = getMigrationFilenames();
+	uint32_t currentRev = currentRevision();
+	uint32_t targetRev = (migrations.size());
+
+	for(uint32_t i = currentRev + 1; i <= targetRev; i++)
+	{
+		QString fileName = QString(":/looqs-migrations/%1.sql").arg(i);
+		QFile file{fileName};
+		if(!file.open(QIODevice::ReadOnly))
+		{
+			throw LooqsGeneralException("Migration: Failed to find required revision file");
+		}
+		QTextStream stream(&file);
+		db->transaction();
+		while(!stream.atEnd())
+		{
+			QString sql = stream.readLine();
+			QSqlQuery sqlQuery{*db};
+			if(!sqlQuery.exec(sql))
+			{
+
+				db->rollback();
+				throw LooqsGeneralException("Failed to execute sql statement while initializing database: " +
+											sqlQuery.lastError().text());
+			}
+		}
+		QSqlQuery updateVersion{*db};
+		updateVersion.exec(QString("PRAGMA user_version=%1;").arg(i));
+		db->commit();
+		emit migrationDone(i);
+	}
+	emit done();
+}

shared/dbmigrator.h

@@ -0,0 +1,24 @@
+#ifndef DBMIGRATOR_H
+#define DBMIGRATOR_H
+#include <QStringList>
+#include <QSqlDatabase>
+#include <QObject>
+class DBMigrator : public QObject
+{
+	Q_OBJECT
+  private:
+	QSqlDatabase *db;
+
+  public:
+	DBMigrator(QSqlDatabase &db);
+	~DBMigrator();
+	uint32_t currentRevision();
+	void performMigrations();
+	QStringList getMigrationFilenames();
+	bool migrationNeeded();
+  signals:
+	void migrationDone(uint32_t);
+	void done();
+};
+
+#endif // DBMIGRATOR_H

shared/dirscanworker.cpp

@@ -0,0 +1,62 @@
+#include <QThread>
+#include "dirscanworker.h"
+#include "logger.h"
+DirScanWorker::DirScanWorker(ConcurrentQueue<QString> &queue, ConcurrentQueue<QString> &resultQueue,
+							 QStringList ignorePattern, unsigned int progressReportThreshold,
+							 std::atomic<bool> &stopToken)
+{
+	this->queue = &queue;
+	this->resultQueue = &resultQueue;
+	this->wildcardMatcher.setPatterns(ignorePattern);
+	this->progressReportThreshold = progressReportThreshold;
+	this->stopToken = &stopToken;
+	setAutoDelete(false);
+}
+
+void DirScanWorker::run()
+{
+	unsigned int currentProgress = 0;
+	QString path;
+	/* TODO: if we have e. g. only one path, then only one thread will scan this path.
+		 *
+		 * Thus, we must resubmit to the queue directories so other threads can help
+		the current one (requires a new logic for threads in ParallelDirScanner). Alterantively,
+		start new DirScanWorkers ourselves here... */
+	while(queue->dequeue(path))
+	{
+		if(wildcardMatcher.match(path))
+		{
+			continue;
+		}
+		QDirIterator iterator(path, QStringList{}, QDir::Files, QDirIterator::Subdirectories);
+		while(iterator.hasNext())
+		{
+			QString entry = iterator.next();
+			if(wildcardMatcher.match(entry))
+			{
+				continue;
+			}
+			this->results.append(entry);
+			++currentProgress;
+			if(currentProgress == progressReportThreshold)
+			{
+				if(this->stopToken->load(std::memory_order_relaxed))
+				{
+					Logger::info() << "Received cancel request" << Qt::endl;
+					this->results.clear();
+					emit finished();
+					return;
+				}
+
+				this->resultQueue->enqueue(this->results);
+				emit progress(results.length());
+				currentProgress = 0;
+				this->results.clear();
+			}
+		}
+	}
+	this->resultQueue->enqueue(this->results);
+	emit progress(results.length());
+	this->results.clear();
+	emit finished();
+}

shared/dirscanworker.h

@@ -0,0 +1,32 @@
+#ifndef DIRSCANWORKER_H
+#define DIRSCANWORKER_H
+#include <QObject>
+#include <QRunnable>
+#include <QDirIterator>
+#include "concurrentqueue.h"
+#include "wildcardmatcher.h"
+class DirScanWorker : public QObject, public QRunnable
+{
+	Q_OBJECT
+  protected:
+	unsigned int progressReportThreshold = 1000;
+	ConcurrentQueue<QString> *queue = nullptr;
+	ConcurrentQueue<QString> *resultQueue = nullptr;
+
+	WildcardMatcher wildcardMatcher;
+	QVector<QString> results;
+
+	std::atomic<bool> *stopToken;
+
+  public:
+	DirScanWorker(ConcurrentQueue<QString> &queue, ConcurrentQueue<QString> &resultQueue, QStringList ignorePattern,
+				  unsigned int progressReportThreshold, std::atomic<bool> &stopToken);
+
+	void run() override;
+
+  signals:
+	void progress(unsigned int);
+	void finished();
+};
+
+#endif // DIRSCANWORKER_H

shared/filesaver.cpp

@@ -6,7 +6,6 @@
 #include "filesaver.h"
 #include "processor.h"
 #include "pdfprocessor.h"
-#include "commandadd.h"
 #include "defaulttextprocessor.h"
 #include "tagstripperprocessor.h"
 #include "nothingprocessor.h"
@@ -24,6 +23,7 @@ SaveFileResult FileSaver::addFile(QString path)
 {
 	QFileInfo info(path);
 	QString absPath = info.absoluteFilePath();
+
 	auto mtime = info.lastModified().toSecsSinceEpoch();
 	if(this->dbService->fileExistsInDatabase(absPath, mtime))
 	{
@@ -85,7 +85,7 @@ int FileSaver::processFiles(const QVector<QString> paths, std::function<SaveFile
 										  }
 										  else if(result == OK)
 										  {
-											  Logger::info() << "Added" << path << Qt::endl;
+											  Logger::info() << "Saved" << path << Qt::endl;
 										  }
 									  }
 								  }
@@ -96,14 +96,28 @@ int FileSaver::processFiles(const QVector<QString> paths, std::function<SaveFile
 SaveFileResult FileSaver::saveFile(const QFileInfo &fileInfo)
 {
 	QVector<PageData> pageData;
-	QString absPath = fileInfo.absoluteFilePath();
+	QString canonicalPath = fileInfo.canonicalFilePath();
 
 	int status = -1;
+
+	if(!fileInfo.exists())
+	{
+		return NOTFOUND;
+	}
+
 	if(fileInfo.isFile())
 	{
+		for(QString &excludedPath : this->excludedPaths)
+		{
+			if(canonicalPath.startsWith(excludedPath))
+			{
+				return SKIPPED;
+			}
+		}
+
 		QProcess process;
 		QStringList args;
-		args << "process" << absPath;
+		args << "process" << canonicalPath;
 		process.setProcessChannelMode(QProcess::ForwardedErrorChannel);
 		process.start("/proc/self/exe", args);
 		process.waitForStarted();
@@ -125,9 +139,9 @@ SaveFileResult FileSaver::saveFile(const QFileInfo &fileInfo)
 			pageData.append(pd);
 		}
 		status = process.exitCode();
-		if(status != 0)
+		if(status != 0 && status != NOTHING_PROCESSED)
 		{
-			Logger::error() << "Error while processing" << absPath << ":"
+			Logger::error() << "FileSaver::saveFile(): Error while processing" << canonicalPath << ":"
 							<< "Exit code " << status << Qt::endl;
 
 			return PROCESSFAIL;
@@ -137,7 +151,7 @@ SaveFileResult FileSaver::saveFile(const QFileInfo &fileInfo)
 	// Could happen if a file corrupted for example
 	if(pageData.isEmpty() && status != NOTHING_PROCESSED)
 	{
-		Logger::error() << "Could not get any content for " << absPath << Qt::endl;
+		Logger::error() << "Could not get any content for " << canonicalPath << Qt::endl;
 	}
 
 	return this->dbService->saveFile(fileInfo, pageData);

shared/filesaver.h

@@ -2,29 +2,25 @@
 #define FILESAVER_H
 #include <QSqlDatabase>
 #include <QFileInfo>
-#include "command.h"
 #include "pagedata.h"
 #include "filedata.h"
 #include "sqlitedbservice.h"
-
+#include "common.h"
 class FileSaver
 {
   private:
 	SqliteDbService *dbService;
-
-  protected:
-	SaveFileResult addFile(QString path);
-	SaveFileResult updateFile(QString path);
+	QStringList excludedPaths = Common::excludedPaths();
 
   public:
 	FileSaver(SqliteDbService &dbService);
+	SaveFileResult addFile(QString path);
+	SaveFileResult updateFile(QString path);
 	SaveFileResult saveFile(const QFileInfo &fileInfo);
 	int processFiles(const QVector<QString> paths, std::function<SaveFileResult(QString path)> saverFunc,
 					 bool keepGoing, bool verbose);
 	int addFiles(const QVector<QString> paths, bool keepGoing, bool verbose);
 	int updateFiles(const QVector<QString> paths, bool keepGoing, bool verbose);
-
-	;
 };
 
 #endif // FILESAVER_H

shared/filescanworker.cpp

@@ -0,0 +1,36 @@
+#include "filescanworker.h"
+#include "logger.h"
+FileScanWorker::FileScanWorker(SqliteDbService &db, ConcurrentQueue<QString> &queue, int batchsize,
+							   std::atomic<bool> &stopToken)
+{
+	this->dbService = &db;
+	this->queue = &queue;
+	this->batchsize = batchsize;
+	this->stopToken = &stopToken;
+}
+
+void FileScanWorker::run()
+{
+	FileSaver saver{*this->dbService};
+	auto paths = queue->dequeue(batchsize);
+	for(QString &path : paths)
+	{
+		SaveFileResult sfr;
+		try
+		{
+			sfr = saver.addFile(path);
+		}
+		catch(std::exception &e)
+		{
+			Logger::error() << e.what();
+			sfr = PROCESSFAIL; // well...
+		}
+		emit result({path, sfr});
+		if(stopToken->load(std::memory_order_relaxed)) // TODO: relaxed should suffice here, but recheck
+		{
+			emit finished();
+			return;
+		}
+	}
+	emit finished();
+}

shared/filescanworker.h

@@ -0,0 +1,29 @@
+#ifndef FILESCANWORKER_H
+#define FILESCANWORKER_H
+#include <QString>
+#include <QObject>
+#include <QtConcurrent>
+#include <utility>
+#include "paralleldirscanner.h"
+#include "filesaver.h"
+
+typedef std::pair<QString, SaveFileResult> FileScanResult;
+
+class FileScanWorker : public QObject, public QRunnable
+{
+	Q_OBJECT
+  protected:
+	SqliteDbService *dbService;
+	ConcurrentQueue<QString> *queue;
+	int batchsize;
+	std::atomic<bool> *stopToken;
+
+  public:
+	FileScanWorker(SqliteDbService &db, ConcurrentQueue<QString> &queue, int batchsize, std::atomic<bool> &stopToken);
+	void run() override;
+  signals:
+	void result(FileScanResult);
+	void finished();
+};
+
+#endif // FILESCANWORKER_H

shared/indexer.cpp

@@ -0,0 +1,160 @@
+#include "indexer.h"
+#include "logger.h"
+#include "wildcardmatcher.h"
+
+Indexer::Indexer(SqliteDbService &db)
+{
+	dirScanner = QSharedPointer<ParallelDirScanner>(new ParallelDirScanner());
+	connect(dirScanner.data(), &ParallelDirScanner::scanComplete, this, &Indexer::dirScanFinished);
+	connect(dirScanner.data(), &ParallelDirScanner::progress, this, &Indexer::dirScanProgress);
+	this->db = &db;
+}
+
+void Indexer::beginIndexing()
+{
+	this->runningWorkers = 0;
+	this->currentScanProcessedCount = 0;
+	this->currentIndexResult = IndexResult();
+	this->currentIndexResult.begin = QDateTime::currentDateTime();
+	QVector<QString> dirs;
+
+	WildcardMatcher wildcardMatcher;
+	wildcardMatcher.setPatterns(this->ignorePattern);
+	for(QString &path : this->pathsToScan)
+	{
+		if(wildcardMatcher.match(path))
+		{
+			continue;
+		}
+		QFileInfo info{path};
+		if(info.isDir())
+		{
+			dirs.append(path);
+		}
+		else
+		{
+			this->filePathTargetsQueue.enqueue(path);
+		}
+	}
+
+	if(!dirs.empty())
+	{
+		this->dirScanner->setPaths(dirs);
+		this->dirScanner->setIgnorePatterns(this->ignorePattern);
+
+		this->dirScanner->scan();
+	}
+
+	this->workerCancellationToken.store(false, std::memory_order_seq_cst);
+	launchWorker(this->filePathTargetsQueue, this->filePathTargetsQueue.remaining());
+}
+
+void Indexer::setIgnorePattern(QStringList ignorePattern)
+{
+	this->ignorePattern = ignorePattern;
+}
+
+void Indexer::setTargetPaths(QVector<QString> pathsToScan)
+{
+	this->pathsToScan = pathsToScan;
+}
+
+void Indexer::setVerbose(bool verbose)
+{
+	this->verbose = verbose;
+}
+
+void Indexer::setKeepGoing(bool keepGoing)
+{
+	this->keepGoing = keepGoing;
+}
+
+void Indexer::requestCancellation()
+{
+	this->dirScanner->cancel();
+	this->workerCancellationToken.store(true, std::memory_order_release);
+}
+
+IndexResult Indexer::getResult()
+{
+	return this->currentIndexResult;
+}
+
+void Indexer::dirScanFinished()
+{
+	Logger::info() << "Dir scan finished" << Qt::endl;
+	if(!isRunning())
+	{
+		emit finished();
+	}
+}
+
+void Indexer::launchWorker(ConcurrentQueue<QString> &queue, int batchsize)
+{
+	FileScanWorker *runnable = new FileScanWorker(*this->db, queue, batchsize, this->workerCancellationToken);
+	connect(runnable, &FileScanWorker::result, this, &Indexer::processFileScanResult);
+	connect(runnable, &FileScanWorker::finished, this, &Indexer::processFinishedWorker);
+	++this->runningWorkers;
+	QThreadPool::globalInstance()->start(runnable);
+}
+
+void Indexer::dirScanProgress(int current, int total)
+{
+	launchWorker(this->dirScanner->getResults(), current);
+	emit pathsCountChanged(total);
+}
+
+void Indexer::processFileScanResult(FileScanResult result)
+{
+	if(result.second == DBFAIL || result.second == PROCESSFAIL || result.second == NOTFOUND)
+	{
+		this->currentIndexResult.results.append(result);
+		if(!keepGoing)
+		{
+			this->requestCancellation();
+			emit finished();
+			return;
+		}
+	}
+	else
+	{
+		if(verbose)
+		{
+			this->currentIndexResult.results.append(result);
+		}
+	}
+
+	if(result.second == OK)
+	{
+		++this->currentIndexResult.addedPaths;
+	}
+	else if(result.second == SKIPPED)
+	{
+		++this->currentIndexResult.skippedPaths;
+	}
+	else
+	{
+		++this->currentIndexResult.erroredPaths;
+	}
+
+	if(currentScanProcessedCount++ == progressReportThreshold)
+	{
+		emit indexProgress(this->currentIndexResult.total(), this->currentIndexResult.addedPaths,
+						   this->currentIndexResult.skippedPaths, this->currentIndexResult.erroredPaths,
+						   this->dirScanner->pathCount());
+		currentScanProcessedCount = 0;
+	}
+}
+
+bool Indexer::isRunning()
+{
+	return this->runningWorkers > 0 || this->dirScanner->isRunning();
+}
+void Indexer::processFinishedWorker()
+{
+	--this->runningWorkers;
+	if(!isRunning())
+	{
+		emit finished();
+	}
+}

shared/indexer.h

@@ -0,0 +1,92 @@
+#ifndef INDEXER_H
+#define INDEXER_H
+#include <QVector>
+#include <QObject>
+#include "sqlitedbservice.h"
+#include "paralleldirscanner.h"
+#include "filescanworker.h"
+
+class IndexResult
+{
+  public:
+	QDateTime begin;
+	QDateTime end;
+	QVector<FileScanResult> results;
+
+	unsigned int addedPaths = 0;
+	unsigned int skippedPaths = 0;
+	unsigned int erroredPaths = 0;
+
+	unsigned int total()
+	{
+		return addedPaths + skippedPaths + erroredPaths;
+	}
+
+	QVector<QString> failedPaths() const
+	{
+		QVector<QString> result;
+		std::for_each(results.begin(), results.end(),
+					  [&result](FileScanResult res)
+					  {
+						  if(res.second == DBFAIL || res.second == PROCESSFAIL || res.second == NOTFOUND)
+						  {
+							  result.append(res.first);
+						  }
+					  });
+		return result;
+	}
+};
+
+class Indexer : public QObject
+{
+	Q_OBJECT
+  protected:
+	bool verbose = false;
+	bool keepGoing = true;
+	SqliteDbService *db;
+
+	int progressReportThreshold = 50;
+	int currentScanProcessedCount = 0;
+	int runningWorkers = 0;
+
+	QVector<QString> pathsToScan;
+	QSharedPointer<ParallelDirScanner> dirScanner;
+
+	QStringList ignorePattern;
+
+	/* Those path pointing to files not directories */
+	ConcurrentQueue<QString> filePathTargetsQueue;
+
+	std::atomic<bool> workerCancellationToken;
+	IndexResult currentIndexResult;
+	void launchWorker(ConcurrentQueue<QString> &queue, int batchsize);
+
+  public:
+	bool isRunning();
+
+	void beginIndexing();
+	void setIgnorePattern(QStringList ignorePattern);
+	void setTargetPaths(QVector<QString> pathsToScan);
+	void setVerbose(bool verbose);
+	void setKeepGoing(bool keepGoing);
+
+	void requestCancellation();
+
+	Indexer(SqliteDbService &db);
+	IndexResult getResult();
+
+  public slots:
+	void dirScanFinished();
+	void dirScanProgress(int current, int total);
+	void processFileScanResult(FileScanResult result);
+	void processFinishedWorker();
+
+  signals:
+	void pathsCountChanged(int total);
+	void fileScanResult(FileScanResult *result);
+	void indexProgress(unsigned int processedFiles, unsigned int added, unsigned int skipped, unsigned int failed,
+					   unsigned int totalPaths);
+	void finished();
+};
+
+#endif // INDEXER_H

shared/indexsyncer.cpp

@@ -0,0 +1,134 @@
+#include <QDateTime>
+#include "filesaver.h"
+#include "indexsyncer.h"
+
+IndexSyncer::IndexSyncer(SqliteDbService &dbService)
+{
+	this->dbService = &dbService;
+}
+
+void IndexSyncer::setDryRun(bool dryRun)
+{
+	this->dryRun = dryRun;
+}
+
+void IndexSyncer::setVerbose(bool verbose)
+{
+	this->verbose = verbose;
+}
+
+void IndexSyncer::setKeepGoing(bool keepGoing)
+{
+	this->keepGoing = keepGoing;
+}
+
+void IndexSyncer::setRemoveDeletedFromIndex(bool removeDeletedFromIndex)
+{
+	this->removeDeletedFromIndex = removeDeletedFromIndex;
+}
+
+void IndexSyncer::setPattern(QString pattern)
+{
+	this->pattern = pattern;
+}
+
+void IndexSyncer::sync()
+{
+	this->stopToken.store(false, std::memory_order_relaxed);
+	FileSaver saver(*this->dbService);
+	QVector<FileData> files;
+	int offset = 0;
+	int limit = 10000;
+	unsigned int processedRows = dbService->getFiles(files, pattern, offset, limit);
+
+	unsigned int totalUpdatesFilesCount = 0;
+	unsigned int totalDeletedFilesCount = 0;
+	unsigned int totalErroredFilesCount = 0;
+
+	while(processedRows > 0)
+	{
+		QVector<QString> filePathsToUpdate;
+		for(FileData &fileData : files)
+		{
+			if(processedRows % 100 == 0 && this->stopToken.load(std::memory_order_relaxed))
+			{
+				emit finished(totalUpdatesFilesCount, totalDeletedFilesCount, totalErroredFilesCount);
+				return;
+			}
+			if(Common::isMountPath(fileData.absPath))
+			{
+				continue;
+			}
+
+			QFileInfo fileInfo(fileData.absPath);
+			if(fileInfo.exists())
+			{
+				if(fileInfo.isFile())
+				{
+					if(fileInfo.lastModified().toSecsSinceEpoch() != fileData.mtime)
+					{
+						if(!dryRun)
+						{
+							filePathsToUpdate.append(fileData.absPath);
+						}
+						else
+						{
+							emit updatedDryRun(fileData.absPath);
+						}
+					}
+				}
+			}
+			else
+			{
+				if(this->removeDeletedFromIndex)
+				{
+					if(!dryRun)
+					{
+						if(!this->dbService->deleteFile(fileData.absPath))
+						{
+							emit error("Error: Failed to delete " + fileData.absPath + " from the index");
+							if(!this->keepGoing)
+							{
+								emit finished(totalUpdatesFilesCount, totalDeletedFilesCount, totalErroredFilesCount);
+								return;
+							}
+						}
+						emit removed(fileData.absPath);
+						++totalDeletedFilesCount;
+					}
+					else
+					{
+						emit removedDryRun(fileData.absPath);
+					}
+				}
+			}
+		}
+
+		unsigned int updatedFilesCount = saver.updateFiles(filePathsToUpdate, keepGoing, verbose);
+		unsigned int shouldHaveUpdatedCount = static_cast<unsigned int>(filePathsToUpdate.size());
+		if(updatedFilesCount != shouldHaveUpdatedCount)
+		{
+
+			totalErroredFilesCount += (shouldHaveUpdatedCount - updatedFilesCount);
+			if(!keepGoing)
+			{
+				QString errorMsg = QString("Failed to update all files selected for updating in this batch. Updated") +
+								   updatedFilesCount + "out of" + shouldHaveUpdatedCount + "selected for updating";
+				emit error(errorMsg);
+				emit finished(totalUpdatesFilesCount, totalDeletedFilesCount, totalErroredFilesCount);
+			}
+		}
+		offset += limit;
+		files.clear();
+		totalUpdatesFilesCount += updatedFilesCount;
+
+		processedRows = this->dbService->getFiles(files, pattern, offset, limit);
+	}
+
+	emit finished(totalUpdatesFilesCount, totalDeletedFilesCount, totalErroredFilesCount);
+}
+
+void IndexSyncer::cancel()
+{
+	this->stopToken.store(true, std::memory_order_seq_cst);
+}

shared/indexsyncer.h

@@ -0,0 +1,39 @@
+#ifndef INDEXSYNCER_H
+#define INDEXSYNCER_H
+#include "sqlitedbservice.h"
+
+class IndexSyncer : public QObject
+{
+	Q_OBJECT
+  private:
+	SqliteDbService *dbService = nullptr;
+	bool keepGoing = true;
+	bool removeDeletedFromIndex = true;
+	bool dryRun = false;
+	bool verbose = false;
+	QString pattern;
+
+	std::atomic<bool> stopToken{false};
+
+  public:
+	IndexSyncer(SqliteDbService &dbService);
+
+  public slots:
+	void sync();
+	void cancel();
+	void setDryRun(bool dryRun);
+	void setVerbose(bool verbose);
+	void setKeepGoing(bool keepGoing);
+	void setRemoveDeletedFromIndex(bool removeDeletedFromIndex);
+	void setPattern(QString pattern);
+
+  signals:
+	void error(QString error);
+	void removed(QString path);
+	void removedDryRun(QString path);
+	void updatedDryRun(QString path);
+	void updated(QString path);
+	void finished(unsigned int totalUpdated, unsigned int totalDeleted, unsigned int totalErrored);
+};
+
+#endif // INDEXSYNCER_H

shared/looqsquery.cpp

@@ -169,6 +169,10 @@ void LooqsQuery::addToken(Token t)
  * TODO: It's a bit ugly still*/
 LooqsQuery LooqsQuery::build(QString expression, TokenType loneWordsTokenType, bool mergeLoneWords)
 {
+	if(expression.isEmpty())
+	{
+		return LooqsQuery{};
+	}
 	if(!checkParanthesis(expression))
 	{
 		throw LooqsGeneralException("Invalid paranthesis");
@@ -176,8 +180,9 @@ LooqsQuery LooqsQuery::build(QString expression, TokenType loneWordsTokenType, b
 
 	QStringList loneWords;
 	LooqsQuery result;
-	QRegularExpression rx("((?<filtername>(\\.|\\w)+):(?<args>\\((?<innerargs>[^\\)]+)\\)|([\\w,])+)|(?<boolean>AND|OR)"
-						  "|(?<negation>!)|(?<bracket>\\(|\\))|(?<loneword>\\w+))");
+	QRegularExpression rx(
+		"((?<filtername>(\\.|\\w)+):(?<args>\\((?<innerargs>[^\\)]+)\\)|([\\p{L},])+)|(?<boolean>AND|OR)"
+		"|(?<negation>!)|(?<bracket>\\(|\\))|(?<loneword>[\"\\p{L}]+))");
 	QRegularExpressionMatchIterator i = rx.globalMatch(expression);
 	auto previousWasBool = [&result] { return !result.tokens.empty() && ((result.tokens.last().type & BOOL) == BOOL); };
 	auto previousWas = [&result](TokenType t) { return !result.tokens.empty() && (result.tokens.last().type == t); };
@@ -216,19 +221,8 @@ LooqsQuery LooqsQuery::build(QString expression, TokenType loneWordsTokenType, b
 			{
 				throw LooqsGeneralException("Can't have two negations following each other");
 			}
-			if(!previousWasBool())
-			{
-				result.addToken(Token(BOOL_AND)); // Implicit and, our default operation
-			}
 			result.addToken(Token(NEGATION));
 		}
-		if(!result.tokens.isEmpty() && !previousWasBool() && !previousWas(NEGATION) && !previousWas(BRACKET_OPEN) &&
-		   bracket != ")")
-		{
-			// the current token isn't a negation, isn't a boolean. Thus, implicit AND is required
-			result.addToken(Token(BOOL_AND));
-		}
-
 		if(bracket != "")
 		{
 			if(bracket == "(")
@@ -255,7 +249,7 @@ LooqsQuery LooqsQuery::build(QString expression, TokenType loneWordsTokenType, b
 
 		if(filtername != "")
 		{
-			TokenType tokenType;
+			TokenType tokenType = WORD;
 			QString value = m.captured("innerargs");
 			if(value == "")
 			{
@@ -266,15 +260,15 @@ LooqsQuery LooqsQuery::build(QString expression, TokenType loneWordsTokenType, b
 				throw LooqsGeneralException("value cannot be empty for filters");
 			}
 
-			if(filtername == "path.contains")
+			if(filtername == "p" || filtername == "path.contains")
 			{
 				tokenType = FILTER_PATH_CONTAINS;
 			}
-			else if(filtername == "path.starts")
+			else if(filtername == "pb" || filtername == "path.starts")
 			{
 				tokenType = FILTER_PATH_STARTS;
 			}
-			else if(filtername == "path.ends")
+			else if(filtername == "pe" || filtername == "path.ends")
 			{
 				tokenType = FILTER_PATH_ENDS;
 			}
@@ -290,21 +284,21 @@ LooqsQuery LooqsQuery::build(QString expression, TokenType loneWordsTokenType, b
 			{
 				tokenType = FILTER_CONTENT_PAGE;
 			}
-			else if(filtername ==
-					"sort") // TODO: given this is not really a "filter", this feels slightly misplaced here
+			// TODO: given this is not really a "filter", this feels slightly misplaced here
+			else if(filtername == "sort")
 			{
 				if(!result.sortConditions.empty())
 				{
 					throw LooqsGeneralException("Two sort statements are illegal");
 				}
-				// TODO: hack, since we are not a "filter", we must remove a preceeding (implicit) boolean
-				if((result.tokens.last().type & BOOL) == BOOL)
-				{
-					result.tokens.pop_back();
-				}
 				result.sortConditions = createSortConditions(value);
 				continue;
 			}
+			else if(filtername == "limit")
+			{
+				result.limit = value.toInt();
+				continue;
+			}
 			else
 			{
 				throw LooqsGeneralException("Unknown filter provided!");
@@ -322,6 +316,26 @@ LooqsQuery LooqsQuery::build(QString expression, TokenType loneWordsTokenType, b
 		}
 	}
 
+	/* Add our default implicit AND boolean condition where appropriate */
+	QVector<Token> newTokens;
+
+	TokenType prevType = BOOL_AND;
+	int needsBoolean = FILTER_CONTENT | FILTER_PATH | NEGATION;
+	for(Token &t : result.tokens)
+	{
+		if(t.type == BRACKET_OPEN || t.type & needsBoolean)
+		{
+			if(!((prevType & BOOL) == BOOL) && !((prevType & NEGATION) == NEGATION) &&
+			   !((prevType & BRACKET_OPEN) == BRACKET_OPEN))
+			{
+				newTokens.append(Token(BOOL_AND));
+			}
+		}
+		prevType = t.type;
+		newTokens.append(t);
+	}
+	result.tokens = newTokens;
+
 	bool contentsearch = result.hasContentSearch();
 	bool sortsForContent = std::any_of(result.sortConditions.begin(), result.sortConditions.end(),
 									   [](SortCondition c) { return c.field == CONTENT_TEXT; });

shared/looqsquery.h

@@ -40,6 +40,7 @@ class LooqsQuery
 	/* Helper field to determine quertype as well as to quickly check what kind of filters etc.
 	 * are being used in this query*/
 	int tokensMask = 0;
+	int limit = -1;
 	QVector<Token> tokens;
 	QVector<SortCondition> sortConditions;
 	void addToken(Token t);
@@ -52,6 +53,14 @@ class LooqsQuery
 	{
 		return tokensMask;
 	}
+	int getLimit() const
+	{
+		return limit;
+	}
+	void setLimit(int limit)
+	{
+		this->limit = limit;
+	}
 	bool hasContentSearch();
 	bool hasPathSearch();
 

shared/migrations/migrations.qrc

@@ -0,0 +1,5 @@
+<RCC>
+    <qresource prefix="/looqs-migrations">
+        <file>1.sql</file>
+    </qresource>
+</RCC>

shared/paralleldirscanner.cpp

@@ -0,0 +1,103 @@
+#include "paralleldirscanner.h"
+
+#include <QRunnable>
+#include <QMutex>
+#include <QDirIterator>
+#include <QThread>
+#include <QThreadPool>
+#include <functional>
+#include "dirscanworker.h"
+#include "logger.h"
+
+ParallelDirScanner::ParallelDirScanner()
+{
+	this->threadpool.setMaxThreadCount(QThread::idealThreadCount() / 2);
+}
+
+ConcurrentQueue<QString> &ParallelDirScanner::getResults()
+{
+	return this->resultPathsQueue;
+}
+
+void ParallelDirScanner::setIgnorePatterns(QStringList patterns)
+{
+	this->ignorePatterns = patterns;
+}
+
+void ParallelDirScanner::setPaths(QVector<QString> paths)
+{
+	this->paths = paths;
+}
+
+void ParallelDirScanner::cancel()
+{
+	this->stopToken.store(true, std::memory_order_seq_cst);
+}
+
+void ParallelDirScanner::handleWorkersProgress(unsigned int progress)
+{
+	this->processedPaths += progress;
+	if(!this->stopToken.load(std::memory_order_seq_cst))
+		emit this->progress(progress, this->processedPaths);
+}
+
+void ParallelDirScanner::handleWorkersFinish()
+{
+	// no mutexes required due to queued connection
+	++finishedWorkers;
+	if(this->stopToken.load(std::memory_order_seq_cst) || finishedWorkers == getThreadsNum())
+	{
+		running = false;
+		emit scanComplete();
+	}
+	delete QObject::sender();
+}
+
+unsigned int ParallelDirScanner::getThreadsNum() const
+{
+	int threadsNum = this->threadpool.maxThreadCount();
+	if(threadsNum > this->paths.size())
+	{
+		threadsNum = this->paths.size();
+	}
+	return threadsNum;
+}
+
+void ParallelDirScanner::scan()
+{
+	this->stopToken.store(false, std::memory_order_relaxed);
+	this->finishedWorkers = 0;
+	this->processedPaths = 0;
+	this->targetPathsQueue.clear();
+	this->resultPathsQueue.clear();
+
+	this->targetPathsQueue.enqueue(this->paths);
+	int threadsNum = getThreadsNum();
+	if(threadsNum == 0)
+	{
+		emit scanComplete();
+		return;
+	}
+	running = true;
+	for(int i = 0; i < threadsNum; i++)
+	{
+		DirScanWorker *runnable = new DirScanWorker(this->targetPathsQueue, this->resultPathsQueue,
+													this->ignorePatterns, 1000, this->stopToken);
+		runnable->setAutoDelete(false);
+		connect(runnable, &DirScanWorker::progress, this, &ParallelDirScanner::handleWorkersProgress,
+				Qt::QueuedConnection);
+		connect(runnable, &DirScanWorker::finished, this, &ParallelDirScanner::handleWorkersFinish,
+				Qt::QueuedConnection);
+		threadpool.start(runnable);
+	}
+}
+
+bool ParallelDirScanner::isRunning()
+{
+	return this->running;
+}
+
+unsigned int ParallelDirScanner::pathCount()
+{
+	return this->processedPaths;
+}

shared/paralleldirscanner.h

@@ -0,0 +1,49 @@
+#ifndef PARALLELDIRSCANNER_H
+#define PARALLELDIRSCANNER_H
+
+#include <QObject>
+#include <QMutex>
+#include <atomic>
+#include <QThreadPool>
+#include "concurrentqueue.h"
+class ParallelDirScanner : public QObject
+{
+	Q_OBJECT
+  protected:
+	QStringList ignorePatterns;
+	QThreadPool threadpool;
+
+	unsigned int finishedWorkers = 0;
+	unsigned int processedPaths = 0;
+
+	std::atomic<bool> stopToken;
+
+	bool running = false;
+
+	QVector<QString> paths;
+	ConcurrentQueue<QString> targetPathsQueue;
+	ConcurrentQueue<QString> resultPathsQueue;
+	unsigned int getThreadsNum() const;
+
+  public:
+	ParallelDirScanner();
+
+	ConcurrentQueue<QString> &getResults();
+	void setIgnorePatterns(QStringList patterns);
+	void setPaths(QVector<QString> paths);
+	void scan();
+	bool isRunning();
+
+	unsigned int pathCount();
+
+  signals:
+	void scanComplete();
+	void progress(int, int);
+  public slots:
+	void cancel();
+  private slots:
+	void handleWorkersProgress(unsigned int progress);
+	void handleWorkersFinish();
+};
+
+#endif // PARALLELDIRSCANNER_H

shared/sandboxedprocessor.cpp

@@ -9,6 +9,7 @@
 #include "odtprocessor.h"
 #include "odsprocessor.h"
 #include "../submodules/exile.h/exile.h"
+#include "common.h"
 #include "logger.h"
 
 static DefaultTextProcessor *defaultTextProcessor = new DefaultTextProcessor();
@@ -22,10 +23,15 @@ static QMap<QString, Processor *> processors{
 	{"py", defaultTextProcessor},	{"xml", nothingProcessor},	   {"html", tagStripperProcessor},
 	{"java", defaultTextProcessor}, {"js", defaultTextProcessor},  {"cpp", defaultTextProcessor},
 	{"c", defaultTextProcessor},	{"sql", defaultTextProcessor}, {"odt", odtProcessor},
-	{"ods", odsProcessor}};
+	{"ods", odsProcessor},			{"svg", nothingProcessor}};
 
 void SandboxedProcessor::enableSandbox(QString readablePath)
 {
+	if(Common::noSandboxModeRequested())
+	{
+		qInfo() << "Sandbox is disabled!" << Qt::endl;
+		return;
+	}
 	struct exile_policy *policy = exile_init_policy();
 	if(policy == NULL)
 	{
@@ -34,10 +40,11 @@ void SandboxedProcessor::enableSandbox(QString readablePath)
 	}
 	policy->namespace_options = EXILE_UNSHARE_NETWORK | EXILE_UNSHARE_USER;
 
+	std::string readablePathLocation;
 	if(!readablePath.isEmpty())
 	{
-		std::string readablePathLocation = readablePath.toStdString();
-		if(exile_append_path_policy(policy, EXILE_FS_ALLOW_ALL_READ, readablePathLocation.c_str()) != 0)
+		readablePathLocation = readablePath.toStdString();
+		if(exile_append_path_policies(policy, EXILE_FS_ALLOW_ALL_READ, readablePathLocation.c_str()) != 0)
 		{
 			qCritical() << "Failed to add path policies";
 			exit(EXIT_FAILURE);
@@ -50,7 +57,7 @@ void SandboxedProcessor::enableSandbox(QString readablePath)
 	int ret = exile_enable_policy(policy);
 	if(ret != 0)
 	{
-		qDebug() << "Failed to establish sandbox: " << ret;
+		qCritical() << "Failed to establish sandbox: " << ret;
 		exit(EXIT_FAILURE);
 	}
 	exile_free_policy(policy);
@@ -74,9 +81,16 @@ void SandboxedProcessor::printResults(const QVector<PageData> &pageData)
 int SandboxedProcessor::process()
 {
 	QFileInfo fileInfo(this->filePath);
-	Processor *processor = processors.value(fileInfo.suffix(), nothingProcessor);
-
-	if(processor == nothingProcessor)
+	Processor *processor = processors.value(fileInfo.suffix(), nullptr);
+	if(processor == nullptr)
+	{
+		/* TODO: Not sandboxed */
+		if(Common::isTextFile(fileInfo))
+		{
+			processor = defaultTextProcessor;
+		}
+	}
+	if(processor == nullptr || processor == nothingProcessor)
 	{
 		/* Nothing to do */
 		return NOTHING_PROCESSED;
@@ -102,7 +116,7 @@ int SandboxedProcessor::process()
 	}
 	catch(LooqsGeneralException &e)
 	{
-		Logger::error() << "Error while processing" << absPath << ":" << e.message << Qt::endl;
+		Logger::error() << "SandboxedProcessor: Error while processing" << absPath << ":" << e.message << Qt::endl;
 		return 3 /* PROCESSFAIL */;
 	}
 

shared/sandboxedprocessor.h

@@ -1,12 +1,14 @@
 #ifndef SANDBOXEDPROCESSOR_H
 #define SANDBOXEDPROCESSOR_H
 #include <QString>
+#include <QMimeDatabase>
 #include "pagedata.h"
 
 class SandboxedProcessor
 {
   private:
 	QString filePath;
+	QMimeDatabase mimeDatabase;
 
 	void enableSandbox(QString readablePath = "");
 	void printResults(const QVector<PageData> &pageData);