3 This file is part of Minitube.
4 Copyright 2009, Flavio Tordini <flavio.tordini@gmail.com>
6 Minitube is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 Minitube is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with Minitube. If not, see <http://www.gnu.org/licenses/>.
22 #include "constants.h"
23 #include <QDesktopServices>
25 static const int DATABASE_VERSION = 1;
26 static const QString dbName = QLatin1String(Constants::UNIX_NAME) + ".db";
27 static Database *databaseInstance = 0;
29 Database::Database() {
30 #if QT_VERSION >= 0x050000
31 QString dataLocation = QStandardPaths::writableLocation(QStandardPaths::DataLocation);
33 QString dataLocation = QDesktopServices::storageLocation(QDesktopServices::DataLocation);
36 QDir().mkpath(dataLocation);
37 dbLocation = dataLocation + "/" + dbName;
39 QMutexLocker locker(&lock);
41 if(QFile::exists(dbLocation)) {
43 int databaseVersion = getAttribute("version").toInt();
44 if (databaseVersion != DATABASE_VERSION)
45 qWarning("Wrong database version: %d", databaseVersion);
46 } else createDatabase();
49 Database::~Database() {
53 void Database::createDatabase() {
55 qWarning() << "Creating the database";
57 const QSqlDatabase db = getConnection();
59 QSqlQuery("create table subscriptions ("
60 "id integer primary key autoincrement,"
64 "description varchar,"
68 "checked integer," // last check for videos on YT APIs
69 "updated integer," // most recent video added
70 "watched integer," // last time the user watched this channel
71 "loaded integer," // last time channel metadata was loaded from YT APIs
72 "notify_count integer," // new videos since "watched"
73 "views integer)" // number of times the user watched this channel
75 QSqlQuery("create unique index idx_user_id on subscriptions(user_id)", db);
77 QSqlQuery("create table subscriptions_videos ("
78 "id integer primary key autoincrement,"
87 "description varchar,"
93 QSqlQuery("create unique index idx_video_id on subscriptions_videos(video_id)", db);
95 QSqlQuery("create table attributes (name varchar, value)", db);
96 QSqlQuery("insert into attributes (name, value) values ('version', "
97 + QString::number(DATABASE_VERSION) + ")", db);
100 QString Database::getDbLocation() {
101 #if QT_VERSION >= 0x050000
102 static const QString dataLocation = QStandardPaths::writableLocation(QStandardPaths::DataLocation);
104 static const QString dataLocation = QDesktopServices::storageLocation(QDesktopServices::DataLocation);
106 return dataLocation + "/" + dbName;
109 bool Database::exists() {
110 static bool fileExists = false;
112 fileExists = QFile::exists(getDbLocation());
116 Database& Database::instance() {
118 QMutexLocker locker(&mutex);
119 if (!databaseInstance) databaseInstance = new Database();
120 return *databaseInstance;
123 QSqlDatabase Database::getConnection() {
124 QThread *currentThread = QThread::currentThread();
125 if (!currentThread) {
126 qDebug() << "current thread is null";
127 return QSqlDatabase();
130 const QString threadName = currentThread->objectName();
131 // qDebug() << "threadName" << threadName << currentThread;
132 if (connections.contains(currentThread)) {
133 return connections.value(currentThread);
135 // qDebug() << "Creating db connection for" << threadName;
136 QSqlDatabase connection = QSqlDatabase::addDatabase("QSQLITE", threadName);
137 connection.setDatabaseName(dbLocation);
138 if(!connection.open()) {
139 qWarning() << QString("Cannot connect to database %1 in thread %2").arg(dbLocation, threadName);
141 connections.insert(currentThread, connection);
146 QVariant Database::getAttribute(QString name) {
147 QSqlQuery query("select value from attributes where name=?", getConnection());
148 query.bindValue(0, name);
150 bool success = query.exec();
151 if (!success) qDebug() << query.lastQuery() << query.boundValues().values() << query.lastError().text();
153 return query.value(0);
157 void Database::setAttribute(QString name, QVariant value) {
158 QSqlQuery query(getConnection());
159 query.prepare("update attributes set value=? where name=?");
160 query.bindValue(0, value);
161 query.bindValue(1, name);
162 bool success = query.exec();
163 if (!success) qDebug() << query.lastError().text();
167 * After calling this method you have to reacquire a valid instance using instance()
169 void Database::drop() {
170 /// closeConnections();
171 if (!QFile::remove(dbLocation)) {
172 qWarning() << "Cannot delete database" << dbLocation;
174 // fallback to delete records in tables
175 const QSqlDatabase db = getConnection();
177 if (!query.exec("select name from sqlite_master where type='table'")) {
178 qWarning() << query.lastQuery() << query.lastError().text();
181 while (query.next()) {
182 QString tableName = query.value(0).toString();
183 if (tableName.startsWith("sqlite_") || tableName == QLatin1String("attributes")) continue;
184 QString dropSQL = "delete from " + tableName;
185 QSqlQuery query2(db);
186 if (!query2.exec(dropSQL))
187 qWarning() << query2.lastQuery() << query2.lastError().text();
190 query.exec("delete from sqlite_sequence");
193 if (databaseInstance) delete databaseInstance;
194 databaseInstance = 0;
197 void Database::closeConnections() {
198 foreach(QSqlDatabase connection, connections.values()) {
199 // qDebug() << "Closing connection" << connection;
205 void Database::closeConnection() {
206 QThread *currentThread = QThread::currentThread();
207 if (!connections.contains(currentThread)) return;
208 QSqlDatabase connection = connections.take(currentThread);
209 // qDebug() << "Closing connection" << connection;
213 void Database::shutdown() {
214 if (!databaseInstance) return;
215 QSqlQuery("vacuum", databaseInstance->getConnection());
216 databaseInstance->closeConnections();