Begin delete command implementation

cli/cli.pro

@@ -27,7 +27,9 @@ SOURCES += \
     odtprocessor.cpp \
     utils.cpp \
     odsprocessor.cpp \
-    qssgeneralexception.cpp
+    qssgeneralexception.cpp \
+    commanddelete.cpp \
+    commandupdate.cpp
 
 HEADERS += \
     encodingdetector.h \
@@ -42,5 +44,7 @@ HEADERS += \
     odtprocessor.h \
     utils.h \
     odsprocessor.h \
-    qssgeneralexception.h
+    qssgeneralexception.h \
+    commanddelete.h \
+    commandupdate.h
 INCLUDEPATH += /usr/include/poppler/qt5/ /usr/include/quazip5

cli/command.cpp

@@ -20,6 +20,21 @@ bool Command::fileExistsInDatabase(QSqlDatabase &db, QString path, qint64 mtime)
 	return query.value(0).toBool();
 }
 
+bool Command::fileExistsInDatabase(QSqlDatabase &db, QString path)
+{
+	auto query = QSqlQuery("SELECT 1 FROM file WHERE path = ?", db);
+	query.addBindValue(path);
+	if(!query.exec())
+	{
+		throw QSSGeneralException("Error while trying to query for file existance");
+	}
+	if(!query.next())
+	{
+		return false;
+	}
+	return query.value(0).toBool();
+}
+
 QSqlDatabase Command::dbConnection()
 {
 	if(dbStore.hasLocalData())

cli/command.h

@@ -8,6 +8,7 @@
 class Command
 {
   protected:
+	bool fileExistsInDatabase(QSqlDatabase &db, QString path);
 	bool fileExistsInDatabase(QSqlDatabase &db, QString path, qint64 mtime);
 	QByteArray readFile(QString path) const;
 	QString dbConnectionString;

cli/commandadd.cpp

@@ -183,7 +183,7 @@ int CommandAdd::handle(QStringList arguments)
 								  {
 									  if(result == SKIPPED)
 									  {
-										  qDebug() << "SKIPPED" << path << "as it already exists in the database";
+										  qDebug() << "Skipped" << path << "as it already exists in the database";
 									  }
 									  else
 									  {

cli/commanddelete.cpp

@@ -0,0 +1,96 @@
+#include <QCommandLineParser>
+#include <QFile>
+#include <QFileInfo>
+#include <QDebug>
+#include <QRegularExpression>
+#include <QSqlError>
+#include "commanddelete.h"
+
+int CommandDelete::handle(QStringList arguments)
+{
+	QCommandLineParser parser;
+	parser.addOptions({{{"v", "verbose"}, "Print path of the files while deleting them"},
+					   {"pattern", "Only delete files from index matching the pattern, e. g. */.git/*", "pattern"},
+					   {"deleted", "Delete all files from the index that don't exist anymore"}});
+
+	parser.addHelpOption();
+	parser.addPositionalArgument("delete", "Delete paths from the index", "delete [paths...]");
+
+	parser.process(arguments);
+	bool removeNonExistant = parser.isSet("deleted");
+	bool verbose = parser.isSet("verbose");
+	QString pattern = parser.value("pattern");
+
+	// TODO: port this to QRegularExpression once >5.12 gets more widespread because of this bug
+	// https://bugreports.qt.io/browse/QTBUG-72539?focusedCommentId=439053&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel
+
+	// QRegularExpression regexPattern = QRegularExpression::wildcardToRegularExpression(pattern);
+
+	bool usePattern = !pattern.isEmpty();
+	QRegExp regexPattern(pattern);
+	regexPattern.setPatternSyntax(QRegExp::PatternSyntax::WildcardUnix);
+
+	QSqlDatabase db = dbConnection();
+
+	if(removeNonExistant)
+	{
+		// TODO: try to translate pattern to SQL WHERE
+		QSqlQuery pathsQuery("SELECT path FROM file", db);
+		if(!pathsQuery.exec())
+		{
+			qDebug() << "Failed to query current paths";
+			return 1;
+		}
+
+		while(pathsQuery.next())
+		{
+			QString path = pathsQuery.value(0).toString();
+			if(usePattern && regexPattern.exactMatch(path))
+			{
+				QFile file(path);
+				if(!file.exists())
+				{
+					QSqlQuery query("DELETE FROM file WHERE path = ?", db);
+					query.addBindValue(path);
+					if(!query.exec())
+					{
+						qDebug() << "Failed to delete " << path << query.lastError();
+						return 1;
+					}
+					if(verbose)
+					{
+						qInfo() << "Deleted " << path;
+					}
+				}
+			}
+		}
+	}
+
+	QStringList files = parser.positionalArguments();
+	for(QString &file : files)
+	{
+		QFileInfo fileInfo(file);
+		QString absPath = fileInfo.absoluteFilePath();
+		if(fileExistsInDatabase(db, absPath))
+		{
+			QSqlQuery deletionQuery("DELETE FROM file WHERE path = ?", db);
+			deletionQuery.addBindValue(absPath);
+			if(deletionQuery.exec())
+			{
+				if(verbose)
+				{
+					qInfo() << "Deleted" << absPath;
+				}
+			}
+			else
+			{
+				qDebug() << "Failed to delete:" << absPath << deletionQuery.lastError();
+			}
+		}
+		else
+		{
+			qInfo() << "No such file in database:" << absPath;
+		}
+	}
+	return 0;
+}

cli/commanddelete.h

@@ -0,0 +1,13 @@
+#ifndef COMMANDDELETE_H
+#define COMMANDDELETE_H
+#include "command.h"
+
+class CommandDelete : public Command
+{
+  public:
+	using Command::Command;
+
+	int handle(QStringList arguments) override;
+};
+
+#endif // COMMANDDELETE_H

cli/commandupdate.cpp

@@ -0,0 +1,5 @@
+#include "commandupdate.h"
+
+int CommandUpdate::handle(QStringList arguments)
+{
+}

cli/commandupdate.h

@@ -0,0 +1,13 @@
+#ifndef COMMANDUPDATE_H
+#define COMMANDUPDATE_H
+#include "command.h"
+
+class CommandUpdate : public Command
+{
+  public:
+	CommandUpdate();
+
+	int handle(QStringList arguments) override;
+};
+
+#endif // COMMANDUPDATE_H

cli/main.cpp

@@ -17,6 +17,7 @@
 #include "defaulttextprocessor.h"
 #include "command.h"
 #include "commandadd.h"
+#include "commanddelete.h"
 void printUsage(QString argv0)
 {
 	qInfo() << "Usage: " << argv0 << "command";
@@ -30,6 +31,7 @@ Command *commandFromName(QString name, QString connectionstring)
 	}
 	if(name == "delete")
 	{
+		return new CommandDelete(connectionstring);
 	}
 	if(name == "update")
 	{