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looqs/cli/sqlitedbservice.cpp
Albert S cff481a57e 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.
2019-08-18 00:25:21 +02:00

173 Zeilen
4.7 KiB
C++

#include <QSqlQuery>
#include <QFileInfo>
#include <QDateTime>
#include <QSqlError>
#include "sqlitedbservice.h"
#include "filedata.h"
#include "logger.h"
bool SqliteDbService::fileExistsInDatabase(QString path, qint64 mtime)
{
auto query = QSqlQuery("SELECT 1 FROM file WHERE path = ? and mtime = ?", dbFactory->forCurrentThread());
query.addBindValue(path);
query.addBindValue(mtime);
if(!query.exec())
{
throw QSSGeneralException("Error while trying to query for file existance");
}
if(!query.next())
{
return false;
}
return query.value(0).toBool();
}
QVector<SearchResult> SqliteDbService::search(const QSSQuery &query)
{
auto connection = dbFactory->forCurrentThread();
SqliteSearch searcher(connection);
return searcher.search(query);
}
bool SqliteDbService::fileExistsInDatabase(QString path)
{
auto query = QSqlQuery(dbFactory->forCurrentThread());
query.prepare("SELECT 1 FROM file WHERE path = ?");
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();
}
SqliteDbService::SqliteDbService(DatabaseFactory &dbFactory)
{
this->dbFactory = &dbFactory;
}
bool SqliteDbService::deleteFile(QString path)
{
QSqlQuery query(this->dbFactory->forCurrentThread());
query.prepare("DELETE FROM file WHERE path = ?");
query.addBindValue(path);
bool result = query.exec();
if(!result)
{
Logger::error() << "Failed to delete file" << path << endl;
}
return result;
}
int SqliteDbService::getFiles(QVector<FileData> &results, QString wildCardPattern, int offset, int limit)
{
int processedRows = 0;
// TODO: translate/convert wildCardPattern to SQL where instead of regex
QString sql = "SELECT path, mtime, size, filetype FROM file";
if(limit != 0)
{
sql += " LIMIT " + QString::number(limit);
}
if(offset != 0)
{
sql += " OFFSET " + QString::number(offset);
}
auto query = QSqlQuery(dbFactory->forCurrentThread());
query.prepare(sql);
query.setForwardOnly(true);
if(!query.exec())
{
throw QSSGeneralException("Error while trying to retrieve files from database: " + query.lastError().text());
}
// 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
bool usePattern = !wildCardPattern.isEmpty();
QRegExp regexPattern(wildCardPattern);
regexPattern.setPatternSyntax(QRegExp::PatternSyntax::WildcardUnix);
while(query.next())
{
QString absPath = query.value(0).toString();
if(!usePattern || regexPattern.exactMatch(absPath))
{
FileData current;
current.absPath = absPath;
current.mtime = query.value(1).toInt();
current.size = query.value(2).toInt();
current.filetype = query.value(3).toChar();
results.append(current);
}
++processedRows;
}
return processedRows;
}
SaveFileResult SqliteDbService::saveFile(QFileInfo fileInfo, QVector<PageData> &pageData)
{
QString absPath = fileInfo.absoluteFilePath();
auto mtime = fileInfo.lastModified().toSecsSinceEpoch();
QChar fileType = fileInfo.isDir() ? 'd' : 'f';
QSqlDatabase db = dbFactory->forCurrentThread();
QSqlQuery delQuery(db);
delQuery.prepare("DELETE FROM file WHERE path = ?");
delQuery.addBindValue(absPath);
QSqlQuery inserterQuery(db);
inserterQuery.prepare("INSERT INTO file(path, mtime, size, filetype) VALUES(?, ?, ?, ?)");
inserterQuery.addBindValue(absPath);
inserterQuery.addBindValue(mtime);
inserterQuery.addBindValue(fileInfo.size());
inserterQuery.addBindValue(fileType);
if(!db.transaction())
{
Logger::error() << "Failed to open transaction for " << absPath << " : " << db.lastError() << endl;
return DBFAIL;
}
if(!delQuery.exec())
{
Logger::error() << "Failed DELETE query" << delQuery.lastError() << endl;
db.rollback();
return DBFAIL;
}
if(!inserterQuery.exec())
{
Logger::error() << "Failed INSERT query" << inserterQuery.lastError() << endl;
db.rollback();
return DBFAIL;
}
int lastid = inserterQuery.lastInsertId().toInt();
for(const PageData &data : pageData)
{
QSqlQuery contentQuery(db);
contentQuery.prepare("INSERT INTO content(fileid, page, content) VALUES(?, ?, ?)");
contentQuery.addBindValue(lastid);
contentQuery.addBindValue(data.pagenumber);
contentQuery.addBindValue(data.content);
if(!contentQuery.exec())
{
db.rollback();
Logger::error() << "Failed content insertion " << contentQuery.lastError() << endl;
return DBFAIL;
}
}
if(!db.commit())
{
db.rollback();
Logger::error() << "Failed to commit transaction for " << absPath << " : " << db.lastError() << endl;
return DBFAIL;
}
return OK;
}