//    Licensed Materials - Property of IBM
//
//    IBM Cognos Products: cogadmin
//
//    (C) Copyright IBM Corp. 2005, 2010
//
//    US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
//
//
/**
 * This file defines all the actions available on a list of data source credentials. 
 * Initially, only one is allowed: removeEntries  
 */

com.cognos.admin.ObjectFactory("com.cognos.admin.extension"); 
/* This is a implementation of the extensive event handler. The impl need to have a method named "doAction" to 
 * work as a mapping.
 * @param: env, context of the behaviour controller framework.
 *
 */

com.cognos.admin.extension.DataSourceCredentials = function (env) {
  this.env = env;
  this.state = this.env.state;
  this.fragment = this.env.fragment;
  this.toBeDeleted = this.state.getState("m_deletedIds");
  if (!this.toBeDeleted) {
    this.toBeDeleted = [];
    this._updateClientStateForDelete();
  }
  
};

com.cognos.admin.extension.DataSourceCredentials.USER_PATH_PARAM            = "m_userpath";
com.cognos.admin.extension.DataSourceCredentials.DELETED_IDS_FIELD_NAME     = "m_dataSourceCredentialsToDelete";
com.cognos.admin.extension.DataSourceCredentials.WRITE_ACCESS_PARAM         = "m_canwrite";
com.cognos.admin.extension.DataSourceCredentials.DELETED_IDS_PARAM          = "m_deletedIds";
com.cognos.admin.extension.DataSourceCredentials.ERROR_UNDEFINED_PARAM_INFO = "Illegal argument exception: undefined param info";
com.cognos.admin.extension.DataSourceCredentials.ERROR_UNDEFINED_USER_PATH  = "Illegal argument exception: undefined userpath";
com.cognos.admin.extension.DataSourceCredentials.ERROR_UNDEFINED_HTML_FORM  = "Illegal argument exception: undefined or invalid html form";

com.cognos.admin.extension.DataSourceCredentials._isUserPathDefined = function(userPath) {
  return (typeof userPath == 'string') && userPath && userPath != "";
};

com.cognos.admin.extension.DataSourceCredentials._isHtmlFormDefined = function(htmlForm) {
  return htmlForm && typeof htmlForm.tagName == "string" && htmlForm.tagName.toLowerCase() === 'form';
};

com.cognos.admin.extension.DataSourceCredentials._canWrite = function(writeAccess) {
  var canWrite = false;

  if (writeAccess && typeof writeAccess == "string" && writeAccess.toLowerCase() === 'true') {
    canWrite = true;
  }
  
  return canWrite;
};

com.cognos.admin.extension.DataSourceCredentials._retrieveDeleteIdsField = function(htmlForm) {
  var field = null;
  
  if (htmlForm.elements) {
    field = htmlForm.elements[com.cognos.admin.extension.DataSourceCredentials.DELETED_IDS_FIELD_NAME];
  }
  
  return field;
};



/**
 * This method builds the param string used when the fragment is retrieved
 * @param paramInfo object containing 2 properties: 
 *  - userPath: searchPath of the user for which the data source credentials are retrieved,
 *  - htmlForm: form where the previously deleted entries are kept
 *  @return the param string
 */
com.cognos.admin.extension.DataSourceCredentials.generateDataSourceParams = function(paramInfo) {
  var params = null;
  var toBeDeletedField = null;
  
  if (!paramInfo) {
    throw com.cognos.admin.extension.DataSourceCredentials.ERROR_UNDEFINED_PARAM_INFO;
  }
  
  if (!com.cognos.admin.extension.DataSourceCredentials._isUserPathDefined(paramInfo.userPath)) {
    throw com.cognos.admin.extension.DataSourceCredentials.ERROR_UNDEFINED_USER_PATH;
  }
  if (!com.cognos.admin.extension.DataSourceCredentials._isHtmlFormDefined(paramInfo.htmlForm)) {
    throw com.cognos.admin.extension.DataSourceCredentials.ERROR_UNDEFINED_HTML_FORM;
  }
  params = com.cognos.admin.extension.DataSourceCredentials.USER_PATH_PARAM + "=" + encodeURIComponent(paramInfo.userPath);
  
  toBeDeletedField = com.cognos.admin.extension.DataSourceCredentials._retrieveDeleteIdsField(paramInfo.htmlForm);
  if (toBeDeletedField && toBeDeletedField.value != null && toBeDeletedField.value != "") {
    params += "&" + com.cognos.admin.extension.DataSourceCredentials.DELETED_IDS_PARAM + "=" + encodeURIComponent(toBeDeletedField.value);
  }
  
  params += "&" + com.cognos.admin.extension.DataSourceCredentials.WRITE_ACCESS_PARAM + "=" 
         + encodeURIComponent(com.cognos.admin.extension.DataSourceCredentials._canWrite(paramInfo.canWrite));
  
  
  return params;
  
};

com.cognos.admin.extension.DataSourceCredentials.prototype = {
    /* behaviour controller framework interface implementation
     * @param: e, the event trigger this action
     * @param: tag, the target of the event
     * @param: param, "cogParam" passing from the markup.
     */
    doAction : function (e,tag,param) {
  
      switch (param.actionName){
        case "removeEntries":
          this.removeEntries();
          break;
        default:
          throw new Error("Unknown action name " + param.actionName + "; check your cogParam -> actionName.");
      }
    },
    
    _showMessage: function(msg) {
      alert(msg);
    },
    
    _updateToBeDeletedList : function() {
      var selectedEntries = null;
      var isListUpdated = false;
      
      selectedEntries = this.state.getState("grpActionRows",true);
      if (selectedEntries && selectedEntries.length > 0) {
        for (var i=0; i<selectedEntries.length; i++){
          this.toBeDeleted.push({"storeID":selectedEntries[i]});
        }
        isListUpdated = true;
      } else {
        this._showMessage(ADM.DSC.IDS_NO_SELECTED_ENTRY_FOR_DELETE);
      }
      this.state.clearState("grpActionRows",true);
      return isListUpdated;
    },
    
    _isToBeDeletedListEmpty : function() {
      return this.toBeDeleted.length == 0;
    },
    
    _updateClientStateForDelete : function() {
      this.state.setState("m_deletedIds",this.toBeDeleted);
    },
    
    _retrieveFragmentForDelete: function() {
      if (!this._isToBeDeletedListEmpty()) {
        this.fragment.retrieve();
      }
    },
    
    _updateHiddenFieldForDelete: function() {
      var fields = null;
      fields = document.getElementsByName("m_dataSourceCredentialsToDelete");
      if (fields && fields.length > 0) {
        fields[0].value = com.cognos.admin.util.Tools.JSON.stringify(this.toBeDeleted);
      }
    },
    
    
    removeEntries : function () {
      if (this._updateToBeDeletedList()) {
        this._updateClientStateForDelete();
        this._updateHiddenFieldForDelete();
        this._retrieveFragmentForDelete();
      }
    }
   
};