Refactor search queries: Introduced QSSQuery

Purpose is to seperate certain logic from SQLite and generalize it more.
Even though we only have Sqlite atm, in general the database layers
must be stupid as possible, while QSSQuery should do most of the hard work.

Fixes in Tokenizer logic.
Switched to C++17.
This commit is contained in:
Albert S. 2019-08-17 11:06:35 +02:00
bovenliggende 05a5bac22f
commit cff481a57e
14 gewijzigde bestanden met toevoegingen van 500 en 618 verwijderingen

Bestand weergeven

@ -1,6 +1,6 @@
QT -= gui
QT += sql concurrent
CONFIG += c++11 console
CONFIG += c++17 console
CONFIG -= app_bundle
# The following define makes your compiler emit warnings if you use
@ -32,7 +32,8 @@ SOURCES += \
databasefactory.cpp \
sqlitedbservice.cpp \
logger.cpp \
commandsearch.cpp
commandsearch.cpp \
commandlist.cpp
HEADERS += \
encodingdetector.h \
@ -53,7 +54,8 @@ HEADERS += \
databasefactory.h \
sqlitedbservice.h \
logger.h \
commandsearch.h
commandsearch.h \
commandlist.h
INCLUDEPATH += /usr/include/poppler/qt5/ /usr/include/quazip5

Bestand weergeven

@ -25,8 +25,7 @@ int CommandSearch::handle(QStringList arguments)
QStringList files = parser.positionalArguments();
QString queryStrings = files.join(' ');
auto results = dbService->search(queryStrings);
auto results = dbService->search(QSSQuery::build(queryStrings));
for(SearchResult &result : results)
{

Bestand weergeven

@ -21,11 +21,11 @@ bool SqliteDbService::fileExistsInDatabase(QString path, qint64 mtime)
return query.value(0).toBool();
}
QVector<SearchResult> SqliteDbService::search(QString searchQuery)
QVector<SearchResult> SqliteDbService::search(const QSSQuery &query)
{
auto connection = dbFactory->forCurrentThread();
SqliteSearch searcher(connection);
return searcher.search(searchQuery);
return searcher.search(query);
}
bool SqliteDbService::fileExistsInDatabase(QString path)

Bestand weergeven

@ -6,6 +6,7 @@
#include "pagedata.h"
#include "filedata.h"
#include "../shared/sqlitesearch.h"
#include "../shared/token.h"
enum SaveFileResult
{
OK,
@ -26,7 +27,7 @@ class SqliteDbService
bool deleteFile(QString path);
bool fileExistsInDatabase(QString path);
bool fileExistsInDatabase(QString path, qint64 mtime);
QVector<SearchResult> search(QString searchQuery);
QVector<SearchResult> search(const QSSQuery &query);
};
#endif // SQLITEDBSERVICE_H

Bestand weergeven

@ -7,7 +7,7 @@
QT += core concurrent gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
CONFIG += c++14
CONFIG += c++17
TARGET = qss-gui
TEMPLATE = app

Bestand weergeven

@ -16,6 +16,7 @@
#include "clicklabel.h"
#include "../shared/sqlitesearch.h"
#include "../shared/qssgeneralexception.h"
#include "../shared/qssquery.h"
MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow)
{
ui->setupUi(this);
@ -150,7 +151,7 @@ void MainWindow::pdfPreviewReceived(PdfPreview preview)
void MainWindow::lineEditReturnPressed()
{
QString q = ui->txtSearch->text();
if(!SqliteSearch::checkParanthesis(q))
if(!QSSQuery::checkParanthesis(q))
{
ui->lblSearchResults->setText("Invalid paranthesis");
return;
@ -163,7 +164,7 @@ void MainWindow::lineEditReturnPressed()
[&, q]()
{
SqliteSearch searcher(db);
return searcher.search(q);
return searcher.search(QSSQuery::build(q));
});
searchWatcher.setFuture(searchFuture);
}

Bestand weergeven

@ -1,389 +0,0 @@
#define __SSP_STRONG__ 3
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#define __cpp_attributes 200809
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#define __ATOMIC_ACQUIRE 2
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#define __FLT_MIN__ 1.17549435082228750796873653722224568e-38F
#define __GCC_IEC_559_COMPLEX 2
#define __cpp_aggregate_nsdmi 201304
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#define __DBL_DENORM_MIN__ double(4.94065645841246544176568792868221372e-324L)
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 1
#define __GCC_ATOMIC_CHAR_LOCK_FREE 2
#define __GCC_IEC_559 2
#define __FLT32X_DECIMAL_DIG__ 17
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#define __unix__ 1
#define __cpp_binary_literals 201304
#define __FLT64_DECIMAL_DIG__ 17
#define __GCC_ATOMIC_CHAR32_T_LOCK_FREE 2
#define __x86_64 1
#define __cpp_variadic_templates 200704
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#define __DBL_MIN_10_EXP__ (-307)
#define __FINITE_MATH_ONLY__ 0
#define __cpp_variable_templates 201304
#define __GNUC_PATCHLEVEL__ 0
#define __FLT32_HAS_DENORM__ 1
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#define __has_include(STR) __has_include__(STR)
#define __DEC64_MAX_EXP__ 385
#define __INT8_C(c) c
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#define __FLT64X_MAX_10_EXP__ 4932
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#define __GCC_ATOMIC_BOOL_LOCK_FREE 2
#define __FLT128_DENORM_MIN__ 6.47517511943802511092443895822764655e-4966F128
#define __UINTMAX_TYPE__ long unsigned int
#define __linux 1
#define __DEC32_EPSILON__ 1E-6DF
#define __FLT_EVAL_METHOD_TS_18661_3__ 0
#define __unix 1
#define __UINT32_MAX__ 0xffffffffU
#define __GXX_EXPERIMENTAL_CXX0X__ 1
#define __LDBL_MAX_EXP__ 16384
#define __FLT128_MIN_EXP__ (-16381)
#define __WINT_MIN__ 0U
#define __linux__ 1
#define __FLT128_MIN_10_EXP__ (-4931)
#define __INT_LEAST16_WIDTH__ 16
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#define __FLT128_MANT_DIG__ 113
#define __WCHAR_MIN__ (-__WCHAR_MAX__ - 1)
#define __INT64_C(c) c##L
#define __DBL_DIG__ 15
#define __GCC_ATOMIC_POINTER_LOCK_FREE 2
#define __FLT64X_MANT_DIG__ 64
#define _FORTIFY_SOURCE ((defined __OPTIMIZE__ && __OPTIMIZE__ > 0) ? 2 : 0)
#define __SIZEOF_INT__ 4
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#define __GCC_ATOMIC_CHAR16_T_LOCK_FREE 2
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#define __UINT16_C(c) c
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#define __FLT64X_MIN_10_EXP__ (-4931)
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#define __FLT64_MANT_DIG__ 53
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#define __DBL_MAX__ double(1.79769313486231570814527423731704357e+308L)
#define __cpp_raw_strings 200710
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#define __DBL_HAS_INFINITY__ 1
#define __DEC32_MIN_EXP__ (-94)
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#define __GCC_HAVE_DWARF2_CFI_ASM 1
#define __GXX_ABI_VERSION 1013
#define __FLT128_HAS_INFINITY__ 1
#define __FLT_MIN_EXP__ (-125)
#define __cpp_lambdas 200907
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#define __DBL_MIN__ double(2.22507385850720138309023271733240406e-308L)
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#define __FLT32X_EPSILON__ 2.22044604925031308084726333618164062e-16F32x
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#define __DEC128_MIN__ 1E-6143DL
#define __REGISTER_PREFIX__
#define __UINT16_MAX__ 0xffff
#define __DBL_HAS_DENORM__ 1
#define __FLT32_MIN__ 1.17549435082228750796873653722224568e-38F32
#define __UINT8_TYPE__ unsigned char
#define __NO_INLINE__ 1
#define __FLT_MANT_DIG__ 24
#define __LDBL_DECIMAL_DIG__ 21
#define __VERSION__ "8.2.0"
#define __UINT64_C(c) c##UL
#define __cpp_unicode_characters 200704
#define _STDC_PREDEF_H 1
#define __cpp_decltype_auto 201304
#define __GCC_ATOMIC_INT_LOCK_FREE 2
#define __FLT128_MAX_EXP__ 16384
#define __FLT32_MANT_DIG__ 24
#define __FLOAT_WORD_ORDER__ __ORDER_LITTLE_ENDIAN__
#define __STDC_IEC_559_COMPLEX__ 1
#define __FLT128_HAS_DENORM__ 1
#define __FLT128_DIG__ 33
#define __SCHAR_WIDTH__ 8
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#define __DEC64_EPSILON__ 1E-15DD
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#define __DEC128_MIN_EXP__ (-6142)
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#define __INT_FAST32_TYPE__ long int
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#define unix 1
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#define __DEC32_SUBNORMAL_MIN__ 0.000001E-95DF
#define __INT_FAST16_MAX__ 0x7fffffffffffffffL
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#define __UINT_FAST16_TYPE__ long unsigned int
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#define __DBL_DECIMAL_DIG__ 17
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#define __INT_LEAST64_WIDTH__ 64
#define __UINT_FAST8_TYPE__ unsigned char
#define _GNU_SOURCE 1
#define __cpp_init_captures 201304
#define __ATOMIC_ACQ_REL 4
#define __ATOMIC_RELEASE 3

286
shared/qssquery.cpp Normal file
Bestand weergeven

@ -0,0 +1,286 @@
#include <QStack>
#include <QRegularExpression>
#include <QSqlQuery>
#include <QSqlError>
#include <QStringList>
#include <QDebug>
#include <optional>
#include <algorithm>
#include "qssquery.h"
const QVector<Token> &QSSQuery::getTokens() const
{
return tokens;
}
const QVector<SortCondition> &QSSQuery::getSortConditions() const
{
return sortConditions;
}
QueryType QSSQuery::getQueryType()
{
return static_cast<QueryType>(tokensMask & COMBINED);
}
bool QSSQuery::checkParanthesis(QString expression)
{
QStack<QChar> open;
QStack<QChar> close;
for(QChar &c : expression)
{
if(c == '(')
{
open.push(c);
}
if(c == ')')
{
close.push(c);
}
}
if(open.size() != close.size())
{
return false;
}
while(!open.empty() && !close.empty())
{
QChar o = open.pop();
QChar c = close.pop();
if(o != '(' && c != ')')
{
return false;
}
}
return true;
}
std::optional<QueryField> fromString(QString fieldString)
{
if(fieldString == "path" || fieldString == "file.path")
{
return FILE_PATH;
}
else if(fieldString == "mtime" || fieldString == "file.mtime")
{
return FILE_MTIME;
}
else if(fieldString == "size" || fieldString == "file.size")
{
return FILE_SIZE;
}
else if(fieldString == "content.text")
{
return CONTENT_TEXT;
}
else if(fieldString == "content.page" || fieldString == "page")
{
return CONTENT_TEXT_PAGE;
}
return {};
}
// sort:(mtime desc, page asc)
QVector<SortCondition> createSortConditions(QString sortExpression)
{
QVector<SortCondition> result;
QStringList splitted_inner = sortExpression.split(",");
for(int i = 0; i < splitted_inner.length(); i++)
{
QStringList splitted = splitted_inner[i].split(" ");
if(splitted.length() < 1 || splitted.length() > 2)
{
throw QSSGeneralException("sort specifier must have format [field] (asc|desc)");
}
QString field = splitted[0];
auto queryField = fromString(field);
if(!queryField)
{
throw QSSGeneralException("Unknown sort field supplied");
}
SortOrder order;
if(splitted.length() == 2)
{
QString orderstr = splitted[1];
if(orderstr.compare("asc", Qt::CaseInsensitive) == 0)
{
order = ASC;
}
else if(orderstr.compare("desc", Qt::CaseInsensitive) == 0)
{
order = DESC;
}
else
{
throw QSSGeneralException("Unknown order specifier: " + order);
}
}
else
{
order = ASC;
}
SortCondition condition;
condition.field = queryField.value();
condition.order = order;
result.append(condition);
}
return result;
}
void QSSQuery::addToken(Token t)
{
tokens.append(t);
tokensMask |= t.type;
}
/* Builds the query from the supplied expression
*
* AND is the default boolean operator, when the user does not provide any
* thus, "Downloads zip" becomes essentailly "path.contains:(Downloads) AND path.contains:(zip)"
*
* TODO: It's a bit ugly still*/
QSSQuery QSSQuery::build(QString expression)
{
if(!checkParanthesis(expression))
{
throw QSSGeneralException("Invalid paranthesis");
}
QSSQuery result;
// TODO: merge lonewords
QRegularExpression rx("((?<filtername>(\\.|\\w)+):(?<args>\\((?<innerargs>[^\\)]+)\\)|([\\w,])+)|(?<boolean>AND|OR)"
"|(?<negation>!)|(?<bracket>\\(|\\))|(?<loneword>\\w+))");
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); };
while(i.hasNext())
{
QRegularExpressionMatch m = i.next();
QString boolean = m.captured("boolean");
QString negation = m.captured("negation");
QString filtername = m.captured("filtername");
QString bracket = m.captured("bracket");
QString loneword = m.captured("loneword");
if(boolean != "")
{
if(previousWasBool())
{
throw QSSGeneralException("Can't have two booleans following each other");
}
if(previousWas(NEGATION))
{
throw QSSGeneralException("Can't have a negation preceeding a boolean");
}
if(boolean == "AND")
{
result.addToken(Token(BOOL_AND));
}
else if(boolean == "OR")
{
result.addToken(Token(BOOL_OR));
}
}
if(negation != "")
{
if(previousWas(NEGATION))
{
throw QSSGeneralException("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 == "(")
{
result.addToken(Token(BRACKET_OPEN));
}
else
{
result.addToken(Token(BRACKET_CLOSE));
}
}
if(loneword != "")
{
result.addToken(Token(FILTER_PATH_CONTAINS, loneword));
}
if(filtername != "")
{
TokenType tokenType;
QString value = m.captured("innerargs");
if(value == "")
{
value = m.captured("args");
}
if(filtername == "path.contains")
{
tokenType = FILTER_PATH_CONTAINS;
}
else if(filtername == "path.starts")
{
tokenType = FILTER_PATH_STARTS;
}
else if(filtername == "path.ends")
{
tokenType = FILTER_PATH_ENDS;
}
else if(filtername == "file.size" || filtername == "size")
{
tokenType = FILTER_PATH_SIZE;
}
else if(filtername == "c" || filtername == "contains")
{
tokenType = FILTER_CONTENT_CONTAINS;
}
else if(filtername == "page" || filtername == "content.page")
{
tokenType = FILTER_CONTENT_PAGE;
}
else if(filtername ==
"sort") // TODO: given this is not really a "filter", this feels slightly misplaced here
{
if(!result.sortConditions.empty())
{
throw QSSGeneralException("Two sort statements are illegal");
}
result.sortConditions = createSortConditions(value);
continue;
}
else
{
throw QSSGeneralException("Unknown filter provided!");
}
result.addToken(Token(tokenType, value));
}
}
bool contentsearch = result.getTokensMask() & FILTER_CONTENT == FILTER_CONTENT;
bool sortsForContent = std::any_of(result.sortConditions.begin(), result.sortConditions.end(),
[](SortCondition c) { return c.field == CONTENT_TEXT; });
if(!contentsearch && sortsForContent)
{
throw QSSGeneralException("We cannot sort by text if we don't search for it");
}
return result;
}

59
shared/qssquery.h Normal file
Bestand weergeven

@ -0,0 +1,59 @@
#ifndef QSSQUERY_H
#define QSSQUERY_H
#include <QString>
#include <QVector>
#include "qssgeneralexception.h"
#include "token.h"
/* Fields that can be queried or sorted */
enum QueryField
{
FILE_PATH,
FILE_MTIME,
FILE_SIZE,
CONTENT_TEXT,
CONTENT_TEXT_PAGE
};
enum SortOrder
{
ASC,
DESC
};
struct SortCondition
{
QueryField field;
SortOrder order;
};
enum QueryType
{
NOTHING = 0,
PATH_ONLY = FILTER_PATH,
CONTENT_ONLY = FILTER_CONTENT,
COMBINED = PATH_ONLY | CONTENT_ONLY
};
class QSSQuery
{
private:
/* Helper field to determine quertype as well as to quickly check what kind of filters etc.
* are being used in this query*/
int tokensMask;
QVector<Token> tokens;
QVector<SortCondition> sortConditions;
void addToken(Token t);
public:
const QVector<Token> &getTokens() const;
const QVector<SortCondition> &getSortConditions() const;
QueryType getQueryType();
int getTokensMask() const
{
return tokensMask;
}
static bool checkParanthesis(QString query);
static QSSQuery build(QString query);
};
#endif // QSSQUERY_H

Bestand weergeven

@ -11,6 +11,7 @@ QT -= gui
TARGET = shared
TEMPLATE = lib
CONFIG += staticlib
CONFIG += c++17
# The following define makes your compiler emit warnings if you use
# any feature of Qt which has been marked as deprecated (the exact warnings
@ -24,12 +25,15 @@ DEFINES += QT_DEPRECATED_WARNINGS
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
SOURCES += sqlitesearch.cpp \
qssgeneralexception.cpp
qssgeneralexception.cpp \
qssquery.cpp
HEADERS += sqlitesearch.h \
filedata.h \
searchresult.h \
qssgeneralexception.h
qssgeneralexception.h \
token.h \
qssquery.h
unix {
target.path = /usr/lib
INSTALLS += target

Bestand weergeven

@ -12,217 +12,134 @@ SqliteSearch::SqliteSearch(QSqlDatabase &db)
this->db = &db;
}
QVector<SqliteSearch::Token> SqliteSearch::tokenize(QString expression)
QString SqliteSearch::fieldToColumn(QueryField field)
{
if(!checkParanthesis(expression))
{
throw QSSGeneralException("Invalid paranthesis");
}
// TODO: merge lonewords
QVector<SqliteSearch::Token> result;
QRegularExpression rx("((?<filtername>(\\.|\\w)+):(?<args>\\((?<innerargs>[^\\)]+)\\)|([\\w,])+)|(?<boolean>AND|OR|"
"!)|(?<bracket>\\(|\\))|(?<loneword>\\w+))");
QRegularExpressionMatchIterator i = rx.globalMatch(expression);
auto isSort = [](QString &key) { return key == "sort"; };
auto isBool = [](QString &key) { return key == "AND" || key == "OR" || key == "!"; };
while(i.hasNext())
{
QRegularExpressionMatch m = i.next();
QString boolean = m.captured("boolean");
QString filtername = m.captured("filtername");
QString bracket = m.captured("bracket");
QString loneword = m.captured("loneword");
if(boolean != "")
{
result.append(Token(boolean));
}
if(!result.empty())
{
QString &lastKey = result.last().key;
if(!isBool(lastKey) && !isSort(lastKey) && !isSort(filtername))
{
result.append(Token("AND"));
}
}
if(bracket != "")
{
if(bracket == "(")
{
result.append(Token("AND"));
}
result.append(Token(bracket));
}
if(loneword != "")
{
result.append(Token("path.contains", loneword));
}
if(filtername != "")
{
QString value = m.captured("innerargs");
if(value == "")
{
value = m.captured("args");
}
result.append(Token(filtername, value));
}
}
return result;
}
QString SqliteSearch::fieldToColumn(QString field)
{
if(field == "mtime" || field == "file.mtime")
if(field == FILE_MTIME)
{
return "file.mtime";
}
else if(field == "page" || field == "content.page")
{
return "content.page";
}
else if(field == "path" || field == "file.path")
else if(field == FILE_PATH)
{
return "file.path";
}
else if(field == "size" || field == "file.size")
else if(field == FILE_SIZE)
{
return "file.size";
}
else if(field == CONTENT_TEXT_PAGE)
{
return "content.page";
}
else if(field == CONTENT_TEXT)
{
return "content.text";
}
return "";
}
QString SqliteSearch::createSortSql(const SqliteSearch::Token &token)
QString SqliteSearch::createSortSql(const QVector<SortCondition> sortConditions)
{
// sort:(mtime desc, page asc)
if(token.key == "sort")
QString sortsql;
for(const SortCondition &sc : sortConditions)
{
QString sortsql;
QStringList splitted_inner = token.value.split(",");
for(int i = 0; i < splitted_inner.length(); i++)
QString order;
QString field = fieldToColumn(sc.field);
if(field == "")
{
QStringList splitted = splitted_inner[i].split(" ");
if(splitted.length() < 1 || splitted.length() > 2)
{
throw QSSGeneralException("sort specifier must have format [field] (asc|desc)");
}
QString field = splitted[0];
field = fieldToColumn(field);
if(field == "")
{
throw QSSGeneralException("Unknown sort field supplied");
}
QString order;
if(splitted.length() == 2)
{
order = splitted[1];
if(order.compare("asc", Qt::CaseInsensitive) == 0)
{
order = "ASC";
}
else if(order.compare("desc", Qt::CaseInsensitive) == 0)
{
order = "DESC";
}
else
{
throw QSSGeneralException("Unknown order specifier: " + order);
}
}
else
{
order = "ASC";
}
sortsql += field + " " + order;
if(splitted_inner.length() - i > 1)
{
sortsql += ", ";
}
throw QSSGeneralException("Unknown sort field supplied");
}
if(sc.order == DESC)
{
order = "DESC";
}
else
{
order = "ASC";
}
sortsql += field + " " + order + ", ";
}
sortsql.chop(2);
if(!sortsql.isEmpty())
{
return " ORDER BY " + sortsql;
}
return "";
}
QPair<QString, QVector<QString>> SqliteSearch::createSql(const SqliteSearch::Token &token)
QPair<QString, QVector<QString>> createNonArgPair(QString key)
{
return {" " + key + " ", QVector<QString>()};
}
QPair<QString, QVector<QString>> SqliteSearch::createSql(const Token &token)
{
QPair<QString, QVector<QString>> result;
QString key = token.key;
QString value = token.value;
value = value.replace("'", "\\'");
if(key == "AND" || key == "OR" || key == "(" || key == ")")
if(token.type == BOOL_AND)
{
return {" " + key + " ", QVector<QString>()};
return createNonArgPair("AND");
}
if(key == "!")
if(token.type == BOOL_OR)
{
return {" NOT ", QVector<QString>()};
return createNonArgPair("OR");
}
if(key == "path.starts")
if(token.type == NEGATION)
{
return createNonArgPair("NOT");
}
if(token.type == BRACKET_OPEN)
{
return createNonArgPair("(");
}
if(token.type == BRACKET_CLOSE)
{
return createNonArgPair(")");
}
if(token.type == FILTER_PATH_STARTS)
{
return {" file.path LIKE ? || '%' ", {value}};
}
if(key == "path.ends")
if(token.type == FILTER_PATH_ENDS)
{
return {" file.path LIKE '%' || ? ", {value}};
}
if(key == "path.contains" || key == "inpath")
if(token.type == FILTER_PATH_CONTAINS)
{
return {" file.path LIKE '%' || ? || '%' ", {value}};
}
if(key == "page")
if(token.type == FILTER_CONTENT_PAGE)
{
return {" content.page = ?", {value}};
}
if(key == "contains" || key == "c")
if(token.type == FILTER_CONTENT_CONTAINS)
{
return {" content.id IN (SELECT content_fts.ROWID FROM content_fts WHERE content_fts.content MATCH ?) ",
{value}};
}
throw QSSGeneralException("Unknown token: " + key);
throw QSSGeneralException("Unknown token passed (should not happen)");
}
QSqlQuery SqliteSearch::makeSqlQuery(const QVector<SqliteSearch::Token> &tokens)
QSqlQuery SqliteSearch::makeSqlQuery(const QSSQuery &query)
{
QString whereSql;
QString limitSql;
QString sortSql;
QVector<QString> bindValues;
bool isContentSearch = false;
for(const Token &c : tokens)
{
if(c.key == "sort")
{
if(sortSql != "")
{
throw QSSGeneralException("Invalid input: Two seperate sort statements are invalid");
}
sortSql = createSortSql(c);
}
else
{
if(c.key == "c" || c.key == "contains")
{
isContentSearch = true;
}
auto sql = createSql(c);
whereSql += sql.first;
bindValues.append(sql.second);
}
}
QString prepSql;
if(whereSql.isEmpty())
bool isContentSearch = query.getTokensMask() & FILTER_CONTENT == FILTER_CONTENT;
if(query.getTokens().isEmpty())
{
throw QSSGeneralException("Nothing to search for supplied");
}
for(const Token &token : query.getTokens())
{
auto sql = createSql(token);
whereSql += sql.first;
bindValues.append(sql.second);
}
QString prepSql;
QString sortSql = createSortSql(query.getSortConditions());
if(isContentSearch)
{
if(sortSql.isEmpty())
@ -240,11 +157,6 @@ QSqlQuery SqliteSearch::makeSqlQuery(const QVector<SqliteSearch::Token> &tokens)
{
sortSql = "ORDER BY file.mtime DESC";
}
if(sortSql.contains("content."))
{
throw QSSGeneralException("Cannot sort for content fields when not doing a content search");
}
prepSql = "SELECT file.path AS path, '0' as pages, file.mtime AS mtime, file.size AS size, file.filetype AS "
"filetype FROM file WHERE 1=1 AND " +
whereSql + " " + sortSql;
@ -252,7 +164,6 @@ QSqlQuery SqliteSearch::makeSqlQuery(const QVector<SqliteSearch::Token> &tokens)
QSqlQuery dbquery(*db);
dbquery.prepare(prepSql);
for(const QString &value : bindValues)
{
if(value != "")
@ -263,10 +174,10 @@ QSqlQuery SqliteSearch::makeSqlQuery(const QVector<SqliteSearch::Token> &tokens)
return dbquery;
}
QVector<SearchResult> SqliteSearch::search(const QString &query)
QVector<SearchResult> SqliteSearch::search(const QSSQuery &query)
{
QVector<SearchResult> results;
QSqlQuery dbQuery = makeSqlQuery(tokenize(query));
QSqlQuery dbQuery = makeSqlQuery(query);
bool success = dbQuery.exec();
if(!success)
{
@ -296,35 +207,3 @@ QVector<SearchResult> SqliteSearch::search(const QString &query)
}
return results;
}
bool SqliteSearch::checkParanthesis(QString expression)
{
QStack<QChar> open;
QStack<QChar> close;
for(QChar &c : expression)
{
if(c == '(')
{
open.push(c);
}
if(c == ')')
{
close.push(c);
}
}
if(open.size() != close.size())
{
return false;
}
while(!open.empty() && !close.empty())
{
QChar o = open.pop();
QChar c = close.pop();
if(o != '(' && c != ')')
{
return false;
}
}
return true;
}

Bestand weergeven

@ -3,34 +3,21 @@
#include <QSqlDatabase>
#include <QPair>
#include "searchresult.h"
#include "token.h"
#include "../shared/qssquery.h"
class SqliteSearch
{
class Token
{
public:
QString key;
QString value;
Token(QString key = "", QString value = "")
{
this->key = key;
this->value = value;
}
};
public:
SqliteSearch(QSqlDatabase &db);
QVector<SearchResult> search(const QString &query);
static bool checkParanthesis(QString expression);
QVector<SearchResult> search(const QSSQuery &query);
private:
QSqlDatabase *db;
QVector<Token> tokenize(QString expression);
QSqlQuery makeSqlQuery(const QVector<Token> &tokens);
QString fieldToColumn(QString col);
QSqlQuery makeSqlQuery(const QSSQuery &query);
QString fieldToColumn(QueryField field);
QPair<QString, QVector<QString>> createSql(const Token &token);
QString createSortSql(const SqliteSearch::Token &token);
QString createSortSql(const QVector<SortCondition> sortConditions);
};
#endif // SQLITESEARCH_H

5
shared/token.cpp Normal file
Bestand weergeven

@ -0,0 +1,5 @@
#include "token.h"
Token::Token()
{
}

48
shared/token.h Normal file
Bestand weergeven

@ -0,0 +1,48 @@
#ifndef TOKEN_H
#define TOKEN_H
#include <QString>
enum TokenType
{
WORD,
NEGATION = 2,
BOOL = 4,
BOOL_AND,
BOOL_OR,
GROUP = 8,
BRACKET_OPEN,
BRACKET_CLOSE,
SORT = 16,
FILTER_PATH = 32,
FILTER_PATH_MTIME,
FILTER_PATH_CONTAINS,
FILTER_PATH_SIZE,
FILTER_PATH_ENDS,
FILTER_PATH_STARTS,
FILTER_CONTENT = 64,
FILTER_CONTENT_CONTAINS,
FILTER_CONTENT_PAGE,
};
class Token
{
public:
Token()
{
}
Token(TokenType type)
{
this->type = type;
}
Token(TokenType type, QString value)
{
this->type = type;
this->value = value;
}
TokenType type;
QString value;
};
#endif // TOKEN_H