cool-retro-term/app/Storage.qml

/*******************************************************************************
* Copyright (c) 2013 "Filippo Scognamiglio"
* https://github.com/Swordifish90/cool-old-term
*
* This file is part of cool-old-term.
*
* cool-old-term is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program.  If not, see <http://www.gnu.org/licenses/>.
*******************************************************************************/

import QtQuick 2.2
import QtQuick.LocalStorage 2.0

Item {
    property bool initialized: false

    function getDatabase() {
         return LocalStorage.openDatabaseSync("coololdterm", "1.0", "StorageDatabase", 100000);
    }

    function initialize() {
        var db = getDatabase();
        db.transaction(
            function(tx) {
                tx.executeSql('CREATE TABLE IF NOT EXISTS settings(setting TEXT UNIQUE, value TEXT)');
          });

        initialized = true;
    }

    function setSetting(setting, value) {
       if(!initialized) initialize();

       var db = getDatabase();
       var res = "";
       db.transaction(function(tx) {
            var rs = tx.executeSql('INSERT OR REPLACE INTO settings VALUES (?,?);', [setting,value]);
                  //console.log(rs.rowsAffected)
                  if (rs.rowsAffected > 0) {
                    res = "OK";
                  } else {
                    res = "Error";
                  }
            }
      );
      // The function returns “OK” if it was successful, or “Error” if it wasn't
      return res;
    }

    function getSetting(setting) {
       if(!initialized) initialize();
       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 = undefined;
         }
      })
      return res
    }

    function dropSettings(){
        var db = getDatabase();
        db.transaction(
            function(tx) {
                tx.executeSql('DROP TABLE settings');
          });
    }
}