Added SqliteDbService: All sqlite queries etc. go here

This commit is contained in:
Albert S. 2019-04-16 08:49:02 +02:00
parent d2712e5293
commit 2f1f41608f
2 changed files with 202 additions and 0 deletions

172
cli/sqlitedbservice.cpp Normal file
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#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();
}
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;
}

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cli/sqlitedbservice.h Normal file
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#ifndef SQLITEDBSERVICE_H
#define SQLITEDBSERVICE_H
#include <QFileInfo>
#include "databasefactory.h"
#include "utils.h"
#include "pagedata.h"
#include "filedata.h"
enum SaveFileResult
{
OK,
SKIPPED,
DBFAIL,
PROCESSFAIL
};
class SqliteDbService
{
private:
DatabaseFactory *dbFactory = nullptr;
public:
SqliteDbService(DatabaseFactory &dbFactory);
SaveFileResult saveFile(QFileInfo fileInfo, QVector<PageData> &pageData);
int getFiles(QVector<FileData> &results, QString wildCardPattern, int offset , int limit);
bool deleteFile(QString path);
bool fileExistsInDatabase(QString path);
bool fileExistsInDatabase(QString path, qint64 mtime);
};
#endif // SQLITEDBSERVICE_H