/*
 * Copyright (c) 2010, Sebastian Sdorra
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. Neither the name of SCM-Manager; nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * http://bitbucket.org/sdorra/scm-manager
 *
 */
Sonia.uistate.WebStorageProvider = Ext.extend(Ext.state.Provider,{
  
  /**
   * Configures the webstorage state provider for the application
   * @param {Mixed} config provider configuration
   */
  constructor : function(config){
    Ext.apply(this, config);
  },

  /**
   * Returns the current value for a key
   * @param {String} name The key name
   * @param {Mixed} defaultValue The default value to return if the key lookup does not match
   * @return {Mixed} The state data
   */
  get : function(name, defaultValue){
    var value = localStorage.getItem(name);
    if ( value ){
      value = this.decodeValue(value);
    } else {
      value = defaultValue;
    }
    return value;
  },

  /**
   * Sets the value for a key
   * @param {String} name The key name
   * @param {Mixed} value The state data
   */
  set : function(name, value){
    if(typeof value === "undefined" || value === null){
      this.clear(name);
    } else {
      localStorage.setItem(name, this.encodeValue(value));
    }
  },

  /**
   * Clears a value from the state
   * @param {String} name The key name
   */
  clear : function(name){
    localStorage.removeItem(name);
  }

});