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 "compatibility/pathsservice.h"
26 static const int DATABASE_VERSION = 1;
27 static const QString dbName = QLatin1String(Constants::UNIX_NAME) + ".db";
28 static Database *databaseInstance = 0;
30 Database::Database() {
31 QString dataLocation = Paths::getDataLocation();
33 if (!QDir().mkpath(dataLocation)) {
34 qCritical() << "Failed to create directory " << dataLocation;
36 dbLocation = dataLocation + "/" + dbName;
38 QMutexLocker locker(&lock);
40 if (QFile::exists(dbLocation)) {
42 int databaseVersion = getAttribute("version").toInt();
43 if (databaseVersion > DATABASE_VERSION)
44 qWarning("Wrong database version: %d", databaseVersion);
46 if (!getAttribute("channelIdFix").toBool())
49 } else createDatabase();
52 Database::~Database() {
56 void Database::createDatabase() {
58 qWarning() << "Creating the database";
60 const QSqlDatabase db = getConnection();
62 QSqlQuery("create table subscriptions ("
63 "id integer primary key autoincrement,"
64 "user_id varchar," // this is really channel_id
65 "user_name varchar," // obsolete yt2 username
66 "name varchar," // this is really channel_title
67 "description varchar,"
71 "checked integer," // last check for videos on YT APIs
72 "updated integer," // most recent video added
73 "watched integer," // last time the user watched this channel
74 "loaded integer," // last time channel metadata was loaded from YT APIs
75 "notify_count integer," // new videos since "watched"
76 "views integer)" // number of times the user watched this channel
78 QSqlQuery("create unique index idx_user_id on subscriptions(user_id)", db);
80 QSqlQuery("create table subscriptions_videos ("
81 "id integer primary key autoincrement,"
83 "channel_id integer," // this is really subscription_id
88 "author varchar," // this is really channel_title
89 "user_id varchar," // this is really channel_id
90 "description varchar,"
96 QSqlQuery("create unique index idx_video_id on subscriptions_videos(video_id)", db);
98 QSqlQuery("create table attributes (name varchar, value)", db);
99 QSqlQuery("insert into attributes (name, value) values ('version', "
100 + QString::number(DATABASE_VERSION) + ")", db);
104 QString Database::getDbLocation() {
105 return Paths::getDataLocation() + "/" + dbName;
109 bool Database::exists() {
110 static bool fileExists = false;
112 fileExists = QFile::exists(getDbLocation());
117 Database& Database::instance() {
119 QMutexLocker locker(&mutex);
120 if (!databaseInstance) databaseInstance = new Database();
121 return *databaseInstance;
124 QSqlDatabase Database::getConnection() {
125 QThread *currentThread = QThread::currentThread();
126 if (!currentThread) {
127 qDebug() << "current thread is null";
128 return QSqlDatabase();
131 const QString threadName = currentThread->objectName();
132 // qDebug() << "threadName" << threadName << currentThread;
133 if (connections.contains(currentThread)) {
134 return connections.value(currentThread);
136 // qDebug() << "Creating db connection for" << threadName;
137 QSqlDatabase connection = QSqlDatabase::addDatabase("QSQLITE", threadName);
138 connection.setDatabaseName(dbLocation);
139 if(!connection.open()) {
140 qWarning() << QString("Cannot connect to database %1 in thread %2").arg(dbLocation, threadName);
142 connections.insert(currentThread, connection);
147 QVariant Database::getAttribute(const QString &name) {
148 QSqlQuery query("select value from attributes where name=?", getConnection());
149 query.bindValue(0, name);
151 bool success = query.exec();
152 if (!success) qDebug() << query.lastQuery() << query.boundValues().values() << query.lastError().text();
154 return query.value(0);
158 void Database::setAttribute(const QString &name, const QVariant &value) {
159 QSqlQuery query(getConnection());
160 query.prepare("insert or replace into attributes (name, value) values (?,?)");
161 query.bindValue(0, name);
162 query.bindValue(1, value);
163 bool success = query.exec();
164 if (!success) qWarning() << query.lastError().text();
167 void Database::fixChannelIds() {
168 if (!getConnection().transaction())
169 qWarning() << "Transaction failed" << __PRETTY_FUNCTION__;
171 qWarning() << "Fixing channel ids";
173 QSqlQuery query(getConnection());
174 bool success = query.exec("update subscriptions set user_id='UC' || user_id where user_id not like 'UC%'");
175 if (!success) qWarning() << query.lastError().text();
177 query = QSqlQuery(getConnection());
178 success = query.exec("update subscriptions_videos set user_id='UC' || user_id where user_id not like 'UC%'");
179 if (!success) qWarning() << query.lastError().text();
181 setAttribute("channelIdFix", 1);
183 if (!getConnection().commit())
184 qWarning() << "Commit failed" << __PRETTY_FUNCTION__;
188 * After calling this method you have to reacquire a valid instance using instance()
190 void Database::drop() {
191 /// closeConnections();
192 if (!QFile::remove(dbLocation)) {
193 qWarning() << "Cannot delete database" << dbLocation;
195 // fallback to delete records in tables
196 const QSqlDatabase db = getConnection();
198 if (!query.exec("select name from sqlite_master where type='table'")) {
199 qWarning() << query.lastQuery() << query.lastError().text();
202 while (query.next()) {
203 QString tableName = query.value(0).toString();
204 if (tableName.startsWith("sqlite_") || tableName == QLatin1String("attributes")) continue;
205 QString dropSQL = "delete from " + tableName;
206 QSqlQuery query2(db);
207 if (!query2.exec(dropSQL))
208 qWarning() << query2.lastQuery() << query2.lastError().text();
211 query.exec("delete from sqlite_sequence");
214 if (databaseInstance) delete databaseInstance;
215 databaseInstance = 0;
218 void Database::closeConnections() {
219 foreach(QSqlDatabase connection, connections.values()) {
220 // qDebug() << "Closing connection" << connection;
226 void Database::closeConnection() {
227 QThread *currentThread = QThread::currentThread();
228 if (!connections.contains(currentThread)) return;
229 QSqlDatabase connection = connections.take(currentThread);
230 // qDebug() << "Closing connection" << connection;
234 void Database::shutdown() {
235 if (!databaseInstance) return;
236 QSqlQuery("vacuum", databaseInstance->getConnection());
237 databaseInstance->closeConnections();