storage.js Example File
demos/musicplayer/qml/storage.js
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Components project on Qt Labs.
**
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions contained
** in the Technology Preview License Agreement accompanying this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
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****************************************************************************/
function getDatabase() {
return openDatabaseSync("musicplayer", "1.0", "Settings", 100000)
}
function initialize() {
var db = getDatabase()
db.transaction(
function(tx) {
tx.executeSql("CREATE TABLE IF NOT EXISTS settings(setting TEXT UNIQUE, value TEXT)")
tx.executeSql("CREATE TABLE IF NOT EXISTS playlist(source TEXT, title TEXT, artist TEXT, time TEXT)")
}
)
}
function setSetting(setting, value) {
var db = getDatabase()
var res = ""
db.transaction(
function(tx) {
var rs = tx.executeSql("INSERT OR REPLACE INTO settings VALUES (?,?);", [setting,value])
if (rs.rowsAffected > 0)
res = "OK"
else
res = "Error"
}
)
return res
}
function getSetting(setting) {
var db = getDatabase()
var res = ""
db.transaction(
function(tx) {
var rs = tx.executeSql("SELECT value FROM settings WHERE setting=?;", [setting])
if (rs.rows.length > 0)
res = rs.rows.item(0).value
else
res = "Unknown"
}
)
return res
}
function getPlaylist(playlist) {
var db = getDatabase()
var res = ""
db.transaction(
function(tx) {
var rs = tx.executeSql("SELECT * FROM playlist;")
if (rs.rows.length > 0) {
for(var i = 0; i < rs.rows.length; i++) {
playlist.append({"source": rs.rows.item(i).source,
"title": rs.rows.item(i).title,
"artist": rs.rows.item(i).artist,
"time": rs.rows.item(i).time,
"selected": false})
}
res = "OK"
} else {
res = "Unknown"
}
}
)
return res
}
function setPlaylist(playlist) {
var db = getDatabase()
var res = ""
db.transaction(
function(tx) {
var rs = tx.executeSql("DELETE FROM playlist;")
var count = 0
for(var i = 0; i < playlist.count; i++) {
rs = tx.executeSql("INSERT INTO playlist VALUES (?,?,?,?);",
[playlist.get(i).source, playlist.get(i).title, playlist.get(i).artist, playlist.get(i).time])
count += rs.rowsAffected
}
if (count > 0)
res = "OK"
else
res = "Error"
}
)
return res
}