/*
 * Nexus: Maven Repository Manager
 * Copyright (C) 2008 Sonatype Inc.                                                                                                                          
 * 
 * This file is part of Nexus.                                                                                                                                  
 * 
 * This program 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/.
 *
 */
/*
 * Target Edit/Create panel layout and controller
 */
  
Sonatype.repoServer.RepoTargetEditPanel = function(config){
  var config = config || {};
  var defaultConfig = {};
  Ext.apply(this, config, defaultConfig);
  
  var ht = Sonatype.repoServer.resources.help.repoTargets;
  
  this.actions = {
    refresh : new Ext.Action({
      text: 'Refresh',
      iconCls: 'st-icon-refresh',
      scope:this,
      handler: this.reloadAll
    }),
    deleteAction : new Ext.Action({
      text: 'Delete',
      scope:this,
      handler: this.deleteHandler
    })
  };
  
  //Methods that will take the incoming json data and map over to the ui controls
  this.loadDataModFunc = {
    "patterns" : this.loadPatternsTreeHelper.createDelegate(this)
  };
  
  //Methods that will take the data from the ui controls and map over to json
  this.submitDataModFunc = {
    "patterns" : this.exportPatternsTreeHelper.createDelegate(this)
  };
  
  //A record to hold the name and id of a repository
  this.repoTargetRecordConstructor = Ext.data.Record.create([
    {name:'resourceURI'},
    {name:'id'},
    {name:'contentClass'},
    {name:'name', sortType:Ext.data.SortTypes.asUCString}
  ]);

  //A record to hold the contentClasses
  this.contentClassRecordConstructor = Ext.data.Record.create([
    {name:'contentClass'},
    {name:'name', sortType:Ext.data.SortTypes.asUCString}
  ]);
  
  //Reader and datastore that queries the server for the list of repo targets
  this.repoTargetsReader = new Ext.data.JsonReader({root: 'data', id: 'resourceURI'}, this.repoTargetRecordConstructor );
  this.repoTargetsDataStore = new Ext.data.Store({
    url: Sonatype.config.repos.urls.repoTargets,
    reader: this.repoTargetsReader,
    sortInfo: {field: 'name', direction: 'ASC'},
    autoLoad: true
  });

  //Reader and datastore that queries the server for the list of content classes
  this.contentClassesReader = new Ext.data.JsonReader({root: 'data', id: 'contentClass'}, this.contentClassRecordConstructor );
  this.contentClassesDataStore = new Ext.data.Store({
    url: Sonatype.config.repos.urls.repoContentClasses,
    reader: this.contentClassesReader,
    sortInfo: {field: 'name', direction: 'ASC'},
    autoLoad: true
  });
  
  this.COMBO_WIDTH = 300;
  
  //Build the form
  this.formConfig = {
    region: 'center',
    width: '100%',
    height: '100%',
    autoScroll: true,
    border: false,
    frame: true,
    collapsible: false,
    collapsed: false,
    labelWidth: 150,
    layoutConfig: {
      labelSeparator: ''
    },
        
    items: [
      {
        xtype: 'textfield',
        fieldLabel: 'Name', 
        itemCls: 'required-field',
        helpText: ht.name,
        name: 'name',
        allowBlank: false,
        width: this.COMBO_WIDTH,
        validator: this.checkForDuplicates.createDelegate(this)
      },
      {
        xtype: 'combo',
        fieldLabel: 'Repository Type',
        itemCls: 'required-field',
        helpText: ht.contentClass,
        name: 'contentClass',
        width: this.COMBO_WIDTH,
        store: this.contentClassesDataStore,
        displayField:'contentClass',
        valueField:'contentClass',
        editable: false,
        forceSelection: true,
        mode: 'local',
        triggerAction: 'all',
        emptyText:'Select...',
        selectOnFocus:true,
        allowBlank: false,
        listeners: {
          'select': {
            fn: function(combo, record, index) {
            },
            scope: this
          }
        }       
      },
      {
    	xtype: 'panel',
        style: 'padding-top: 20px',
    	layout: 'column',
        items: [
          {
           	xtype: 'panel',
            layout: 'form',
            width: 380,
            items: [
              {
                xtype: 'textfield',
                fieldLabel: 'Pattern Expression', 
                helpText: ht.pattern,
                name: 'pattern',
                width: 205
              }
            ]
          },
          {
        	xtype: 'panel',
  		    width: 100,
        	items: [
        	  {
                xtype: 'button',
                text: 'Add', 
                style: 'padding-left: 7px',
                minWidth: 85,
                id: 'button-add',
                handler: this.addNewPattern,
                scope: this
        	  }
        	]
          }
        ]
      },
      {
        xtype: 'panel',
        layout: 'column',
        autoHeight: true,
        style: 'padding-left: 155px',
        items: [
          {
            xtype: 'treepanel',
            id: 'repoTargets-pattern-list', //note: unique ID is assinged before instantiation
            title: 'Patterns',
            cls: 'required-field',
            border: true, //note: this seem to have no effect w/in form panel
            bodyBorder: true, //note: this seem to have no effect w/in form panel
            //note: this style matches the expected behavior
            bodyStyle: 'background-color:#FFFFFF; border: 1px solid #B5B8C8',
            style: 'padding: 0 20px 0 0',
            width: 225,
            height: 300,
            animate:true,
            lines: false,
            autoScroll:true,
            containerScroll: true,
            //@note: root node must be instantiated uniquely for each instance of treepanel
            //@ext: can TreeNode be registerd as a component with an xtype so this new root node
            //      may be instantiated uniquely for each form panel that uses this config?
            rootVisible: false,
            enableDD: false          
          },
          { 
            xtype: 'panel',
  		    width: 100,
        	items: [
	          {
	            xtype: 'button',
		        text: 'Remove', 
                style: 'padding-left: 6px',
                minWidth: 85,
		        id: 'button-remove',
                handler: this.removePattern,
                scope: this
		      },
	          {
	            xtype: 'button',
		        text: 'Remove All', 
                style: 'padding-left: 6px; margin-top: 5px',
                minWidth: 85,
		        id: 'button-remove-all',
                handler: this.removeAllPatterns,
                scope: this
		      }
	        ]
          }
        ]
      },
      {
        xtype: 'hidden',
        name: 'id'
      }
    ],
    buttons: [
      {
        id: 'savebutton',
        text: 'Save',
        disabled: true
      },
      {
        id: 'cancelbutton',
        text: 'Cancel'
      }
    ]
  };
  
  this.sp = Sonatype.lib.Permissions;

  this.repoTargetsGridPanel = new Ext.grid.GridPanel({
    title: 'Targets',
    id: 'st-repoTargets-grid',
    
    region: 'north',
    layout:'fit',
    collapsible: true,
    split:true,
    height: 200,
    minHeight: 150,
    maxHeight: 400,
    frame: false,
    autoScroll: true,
    tbar: [
      {
        id: 'repoTarget-refresh-btn',
        text: 'Refresh',
        icon: Sonatype.config.resourcePath + '/images/icons/arrow_refresh.png',
        cls: 'x-btn-text-icon',
        scope: this,
        handler: this.reloadAll
      },
      {
        id: 'repoTarget-add-btn',
        text:'Add',
        icon: Sonatype.config.resourcePath + '/images/icons/add.png',
        cls: 'x-btn-text-icon',
        scope: this,
        handler: this.addResourceHandler,
        disabled: !this.sp.checkPermission(Sonatype.user.curr.repoServer.configRepoTargets, this.sp.CREATE)
      },
      {
        id: 'repoTarget-delete-btn',
        text: 'Delete',
        icon: Sonatype.config.resourcePath + '/images/icons/delete.png',
        cls: 'x-btn-text-icon',
        scope:this,
        handler: this.deleteHandler,
        disabled: !this.sp.checkPermission(Sonatype.user.curr.repoServer.configRepoTargets, this.sp.DELETE)
      }
    ],

    //grid view options
    ds: this.repoTargetsDataStore,
    sortInfo:{field: 'name', direction: "ASC"},
    loadMask: true,
    deferredRender: false,
    columns: [
      {header: 'Name', dataIndex: 'name', width:200},
      {header: 'Repository Type', dataIndex: 'contentClass', width:200, id: 'repo-target-expandable-col'}
    ],
    autoExpandColumn: 'repo-target-expandable-col',
    disableSelection: false,
    viewConfig: {
      emptyText: 'Click "Add" to create a new Repository Target.'
    }
  });
  this.repoTargetsGridPanel.on('rowclick', this.rowClick, this);
  this.repoTargetsGridPanel.on('rowcontextmenu', this.contextClick, this);

  Sonatype.repoServer.RepoTargetEditPanel.superclass.constructor.call(this, {
    layout: 'border',
    autoScroll: false,
    width: '100%',
    height: '100%',
    items: [
      this.repoTargetsGridPanel,
      {
        xtype: 'panel',
        id: 'repoTarget-config-forms',
        title: 'Repository Target Configuration',
        layout: 'card',
        region: 'center',
        activeItem: 0,
        deferredRender: false,
        autoScroll: false,
        frame: false,
        items: [
          {
            xtype: 'panel',
            layout: 'fit',
            html: '<div class="little-padding">Select a target to edit it, or click "Add" to create a new one.</div>'
          }
        ]
      }
    ]
  });

  this.formCards = this.findById('repoTarget-config-forms');
};


Ext.extend(Sonatype.repoServer.RepoTargetEditPanel, Ext.Panel, {
  //Dump the currently stored data and requery for everything
  reloadAll : function(){
    this.repoTargetsDataStore.reload();
    this.formCards.items.each(function(item, i, len){
      if(i>0){this.remove(item, true);}
    }, this.formCards);
    
    this.formCards.getLayout().setActiveItem(0);
  },
  
  saveHandler : function(formInfoObj){
    // validate the form to make sure all the error messages are present
    var formIsValid = formInfoObj.formPanel.form.isValid();
    
 	  var fpanel = formInfoObj.formPanel;
    var treePanel = fpanel.findById(fpanel.id + '_repoTargets-pattern-list');
    var patternField = fpanel.find('name','pattern')[0];
    if (!treePanel.root.hasChildNodes()) {
  	  patternField.markInvalid('The target should have at least one pattern.');
  	  return;
    }

    if ( formIsValid ) {
      var isNew = formInfoObj.isNew;
      var createUri = Sonatype.config.repos.urls.repoTargets;
      var updateUri = (formInfoObj.resourceURI) ? formInfoObj.resourceURI : '';
      var form = formInfoObj.formPanel.form;
    
      form.doAction('sonatypeSubmit', {
        method: (isNew) ? 'POST' : 'PUT',
        url: isNew ? createUri : updateUri,
        waitMsg: isNew ? 'Creating Target...' : 'Updating Target...',
        fpanel: formInfoObj.formPanel,
        dataModifiers: this.submitDataModFunc,
        serviceDataObj : Sonatype.repoServer.referenceData.repoTargets,
        isNew : isNew //extra option to send to callback, instead of conditioning on method
      });
    }
  },
  
  cancelHandler : function(formInfoObj) {
    var formLayout = this.formCards.getLayout();
    var gridSelectModel = this.repoTargetsGridPanel.getSelectionModel();
    var store = this.repoTargetsGridPanel.getStore();
    
    this.formCards.remove(formInfoObj.formPanel.id, true);
    //select previously selected form, or the default view (index == 0)
    var newIndex = this.formCards.items.length - 1;
    newIndex = (newIndex >= 0) ? newIndex : 0;
    formLayout.setActiveItem(newIndex);

    //delete row from grid if canceling a new repo form
    if(formInfoObj.isNew){
      store.remove( store.getById(formInfoObj.formPanel.id) );
    }
    
    //select the coordinating row in the grid, or none if back to default
    var i = store.indexOfId(formLayout.activeItem.id);
    if (i >= 0){
      gridSelectModel.selectRow(i);
    }
    else{
      gridSelectModel.clearSelections();
    }
  },
  
  addResourceHandler : function() {
    var id = 'new_target_' + new Date().getTime();

    var config = Ext.apply({}, this.formConfig, {id:id});
    
    config = this.initializeTreeRoots(id, config);
        
    var formPanel = new Ext.FormPanel(config);
    
    formPanel.form.on('actioncomplete', this.actionCompleteHandler, this);
    formPanel.form.on('actionfailed', this.actionFailedHandler, this);
    formPanel.on('beforerender', this.beforeFormRenderHandler, this);
    formPanel.on('afterlayout', this.afterLayoutFormHandler, this, {single:true});
        
    var buttonInfoObj = {
        formPanel : formPanel,
        isNew : true
      };
    
    //save button event handler
    formPanel.buttons[0].on('click', this.saveHandler.createDelegate(this, [buttonInfoObj]));
    //cancel button event handler
    formPanel.buttons[1].on('click', this.cancelHandler.createDelegate(this, [buttonInfoObj]));
    
    //add place holder to grid
    var newRec = new this.repoTargetRecordConstructor({
        name : 'New Target',
        resourceURI : 'new'
      },
      id); //use "new_user_" id instead of resourceURI like the reader does
    this.repoTargetsDataStore.insert(0, [newRec]);
    this.repoTargetsGridPanel.getSelectionModel().selectRow(0);
    
    //add new form
    this.formCards.add(formPanel);
    
    //always set active and re-layout
    this.formCards.getLayout().setActiveItem(formPanel);
    formPanel.doLayout();
  },
  
  afterLayoutFormHandler : function(formPanel, fLayout){
    // register required field quicktip, but have to wait for elements to show up in DOM
    var temp = function(){
      var els = Ext.select('.required-field .x-form-item-label, .required-field .x-panel-header-text', this.getEl());
      els.each(function(el, els, i){
        Ext.QuickTips.register({
          target: el,
          cls: 'required-field',
          title: '',
          text: 'Required Field',
          enabled: true
        });
      });
    }.defer(300, formPanel);
  },
  
  deleteHandler : function(){
    if (this.ctxRecord || this.repoTargetsGridPanel.getSelectionModel().hasSelection()){
      var rec = this.ctxRecord ? this.ctxRecord : this.repoTargetsGridPanel.getSelectionModel().getSelected();

      if(rec.data.resourceURI == 'new'){
        this.cancelHandler({
          formPanel : Ext.getCmp(rec.id),
          isNew : true
        });
      }
      else {
        //@note: this handler selects the "No" button as the default
        //@todo: could extend Sonatype.MessageBox to take the button to select as a param
        Sonatype.MessageBox.getDialog().on('show', function(){
          this.focusEl = this.buttons[2]; //ack! we're offset dependent here
          this.focus();
        },
        Sonatype.MessageBox.getDialog(),
        {single:true});
        
        Sonatype.MessageBox.show({
          animEl: this.repoTargetsGridPanel.getEl(),
          title : 'Delete Target?',
          msg : 'Delete the ' + rec.get('name') + ' target?',
          buttons: Sonatype.MessageBox.YESNO,
          scope: this,
          icon: Sonatype.MessageBox.QUESTION,
          fn: function(btnName){
            if (btnName == 'yes' || btnName == 'ok') {
              Ext.Ajax.request({
                callback: this.deleteCallback,
                cbPassThru: {
                  resourceId: rec.id
                },
                scope: this,
                method: 'DELETE',
                url:rec.data.resourceURI
              });
            }
          }
        });
      }
    }
  },
  
  deleteCallback : function(options, isSuccess, response){
    if(isSuccess){
      var resourceId = options.cbPassThru.resourceId;
      var formLayout = this.formCards.getLayout();
      var gridSelectModel = this.repoTargetsGridPanel.getSelectionModel();
      var store = this.repoTargetsGridPanel.getStore();

      if(formLayout.activeItem.id == resourceId){
        this.formCards.remove(resourceId, true);
        //select previously selected form, or the default view (index == 0)
        var newIndex = this.formCards.items.length - 1;
        newIndex = (newIndex >= 0) ? newIndex : 0;
        formLayout.setActiveItem(newIndex);
      }
      else {
        this.formCards.remove(resourceId, true);
      }

      store.remove( store.getById(resourceId) );

      //select the coordinating row in the grid, or none if back to default
      var i = store.indexOfId(formLayout.activeItem.id);
      if (i >= 0){
        gridSelectModel.selectRow(i);
      }
      else{
        gridSelectModel.clearSelections();
      }
    }
    else {
      Sonatype.MessageBox.alert('The server did not delete the target.');
    }
  },
      
  //(Ext.form.BasicForm, Ext.form.Action)
  actionCompleteHandler : function(form, action) {
    //@todo: handle server error response here!!

    if (action.type == 'sonatypeSubmit'){
      var isNew = action.options.isNew;
      var receivedData = action.handleResponse(action.response).data;
      if (isNew) {

        var dataObj = {
          id : receivedData.id,
          name : receivedData.name,
          resourceURI : action.getUrl() + '/' + receivedData.id,
          contentClass: receivedData.contentClass
        };
        
        var newRec = new this.repoTargetRecordConstructor(
          dataObj,
          action.options.fpanel.id);
        
        this.repoTargetsDataStore.remove(this.repoTargetsDataStore.getById(action.options.fpanel.id)); //remove old one
        this.repoTargetsDataStore.addSorted(newRec);
        this.repoTargetsGridPanel.getSelectionModel().selectRecords([newRec], false);

        //set the hidden id field in the form for subsequent updates
        action.options.fpanel.find('name', 'id')[0].setValue(receivedData.id);

        //remove button click listeners
        action.options.fpanel.buttons[0].purgeListeners();
        action.options.fpanel.buttons[1].purgeListeners();

        var buttonInfoObj = {
            formPanel : action.options.fpanel,
            isNew : false,
            resourceURI : dataObj.resourceURI
          };

        //save button event handler
        action.options.fpanel.buttons[0].on('click', this.saveHandler.createDelegate(this, [buttonInfoObj]));
        
        //cancel button event handler
        action.options.fpanel.buttons[1].on('click', this.cancelHandler.createDelegate(this, [buttonInfoObj]));
      }
      else {
        var sentData = action.output.data;

        var i = this.repoTargetsDataStore.indexOfId(action.options.fpanel.id);
        var rec = this.repoTargetsDataStore.getAt(i);

        this.updateRepoTargetRecord(rec, sentData);
        
        var sortState = this.repoTargetsDataStore.getSortState();
        this.repoTargetsDataStore.sort(sortState.field, sortState.direction);
      }
    }
  },
  
  updateRepoTargetRecord : function(rec, receivedData){
        rec.beginEdit();
        rec.set('name', receivedData.name);
        rec.set('id', receivedData.id);
        rec.set('contentClass', receivedData.contentClass);
        rec.commit();
        rec.endEdit();
  },

  //(Ext.form.BasicForm, Ext.form.Action)
  actionFailedHandler : function(form, action){
    if(action.failureType == Ext.form.Action.CLIENT_INVALID){
      Sonatype.MessageBox.alert('Missing or Invalid Fields', 'Please change the missing or invalid fields.').setIcon(Sonatype.MessageBox.WARNING);
    }
//@note: server validation error are now handled just like client validation errors by marking the field invalid
//  else if(action.failureType == Ext.form.Action.SERVER_INVALID){
//    Sonatype.MessageBox.alert('Invalid Fields', 'The server identified invalid fields.').setIcon(Sonatype.MessageBox.ERROR);
//  }
    else if(action.failureType == Ext.form.Action.CONNECT_FAILURE){
      Sonatype.utils.connectionError( action.response, 'There is an error communicating with the server.' )
    }
    else if(action.failureType == Ext.form.Action.LOAD_FAILURE){
      Sonatype.MessageBox.alert('Load Failure', 'The data failed to load from the server.').setIcon(Sonatype.MessageBox.ERROR);
    }

    //@todo: need global alert mechanism for fatal errors.
  },
  
  beforeFormRenderHandler : function(component){
    var sp = Sonatype.lib.Permissions;
    // TODO
    if(sp.checkPermission(Sonatype.user.curr.repoServer.configRepoTargets, sp.EDIT)){
      component.buttons[0].disabled = false;
    }
  },

  formDataLoader : function(formPanel, resourceURI, modFuncs){
    formPanel.getForm().doAction('sonatypeLoad', {url:resourceURI, method:'GET', fpanel:formPanel, dataModifiers: modFuncs, scope: this});
  },

  rowClick : function(grid, rowIndex, e){
    var rec = grid.store.getAt(rowIndex);
    var id = rec.id; //note: rec.id is unique for new resources and equal to resourceURI for existing ones
    var formPanel = this.formCards.findById(id);
    
    //assumption: new route forms already exist in formCards, so they won't get into this case
    if(!formPanel){ //create form and populate current data
      var config = Ext.apply({}, this.formConfig, {id:id});
      
      config = this.initializeTreeRoots(id, config);
      
      formPanel = new Ext.FormPanel(config);
      formPanel.form.on('actioncomplete', this.actionCompleteHandler, this);
      formPanel.form.on('actionfailed', this.actionFailedHandler, this);
      formPanel.on('beforerender', this.beforeFormRenderHandler, this);
      formPanel.on('afterlayout', this.afterLayoutFormHandler, this, {single:true});
      
      var buttonInfoObj = {
        formPanel : formPanel,
        isNew : false, //not a new route form, see assumption
        resourceURI : rec.data.resourceURI
      };
      
      formPanel.buttons[0].on('click', this.saveHandler.createDelegate(this, [buttonInfoObj]));
      formPanel.buttons[1].on('click', this.cancelHandler.createDelegate(this, [buttonInfoObj]));
  
      this.formDataLoader(formPanel, rec.data.resourceURI, this.loadDataModFunc);
      
      this.formCards.add(formPanel);
      this.formCards.getLayout().setActiveItem(formPanel);    
      formPanel.doLayout();
    }
    else{
      //always set active
      this.formCards.getLayout().setActiveItem(formPanel);
    }
  },
  
  contextClick : function(grid, index, e){
    this.contextHide();
    
    if ( e.target.nodeName == 'A' ) return; // no menu on links
    
    this.ctxRow = this.repoTargetsGridPanel.view.getRow(index);
    this.ctxRecord = this.repoTargetsGridPanel.store.getAt(index);
    Ext.fly(this.ctxRow).addClass('x-node-ctx');

    //@todo: would be faster to pre-render the six variations of the menu for whole instance
    var menu = new Ext.menu.Menu({
      id:'repoTarget-grid-ctx',
      items: [
        this.actions.refresh
      ]
    });
    
    if (this.sp.checkPermission(Sonatype.user.curr.repoServer.configRepoTargets, this.sp.DELETE)){
        menu.add(this.actions.deleteAction);
    }
    
    //TODO: Add additional menu items
    
    menu.on('hide', this.contextHide, this);
    e.stopEvent();
    menu.showAt(e.getXY());
  },
  
  contextHide : function(){
    if(this.ctxRow){
      Ext.fly(this.ctxRow).removeClass('x-node-ctx');
      this.ctxRow = null;
      this.ctxRecord = null;
    }
  },
  
  initializeTreeRoots : function(id, config){
    //@note: there has to be a better way to do this.  Depending on offsets is very error prone
    var newConfig = config;

    newConfig.items[3].items[0].id = id + '_repoTargets-pattern-list';
    newConfig.items[3].items[0].root = new Ext.tree.TreeNode({text: 'root'});
 
    return newConfig;
  },
    
  loadPatternsTreeHelper : function(arr, srcObj, fpanel){
    var treePanel = fpanel.findById(fpanel.id + '_repoTargets-pattern-list');

    var pattern;

    for(var i=0; i<arr.length; i++){
      pattern = arr[i];
      this.addPatternNode( treePanel, pattern );
    }
    
    return arr; //return arr, even if empty to comply with sonatypeLoad data modifier requirement
  },
  
  exportPatternsTreeHelper : function(val, fpanel){
	var treePanel = fpanel.findById(fpanel.id + '_repoTargets-pattern-list');
    
    var outputArr = [];
    var nodes = treePanel.root.childNodes;
    
    for(var i = 0; i < nodes.length; i++){
      outputArr[i] = nodes[i].attributes.payload;
    }
    
    return outputArr;
  },
  
  addPatternNode: function( treePanel, pattern ) {
	var id = Ext.id();

    treePanel.root.appendChild(
	  new Ext.tree.TreeNode({
	    id: id,
	    text: pattern,
	    payload: pattern,
	    allowChildren: false,
	    draggable: false,
	    leaf: true,
	    nodeType: 'pattern',
	    icon: Sonatype.config.resourcePath + '/ext-2.0.2/resources/images/default/tree/leaf.gif'
	  })
	);
  },
  
  addNewPattern: function() {
	var fpanel = this.formCards.getLayout().activeItem;
    var treePanel = fpanel.findById(fpanel.id + '_repoTargets-pattern-list');
    var patternField = fpanel.find('name','pattern')[0];
    var pattern = patternField.getRawValue();
    
    if ( pattern ) {
      var nodes = treePanel.root.childNodes;
      for(var i = 0; i < nodes.length; i++){
        if (pattern == nodes[i].attributes.payload) {
          patternField.markInvalid('This pattern already exists');
          return;
        }
      }

      this.addPatternNode(treePanel, pattern);
      patternField.setRawValue('');
    }
  },
  
  removePattern: function() {
	var fpanel = this.formCards.getLayout().activeItem;
    var treePanel = fpanel.findById(fpanel.id + '_repoTargets-pattern-list');

    var selectedNode = treePanel.getSelectionModel().getSelectedNode();
    if ( selectedNode ) {
      treePanel.root.removeChild( selectedNode );
    }
  },
  
  removeAllPatterns: function() {
	var fpanel = this.formCards.getLayout().activeItem;
    var treePanel = fpanel.findById(fpanel.id + '_repoTargets-pattern-list');
    var treeRoot = treePanel.root;

    while ( treeRoot.lastChild ) {
      treeRoot.removeChild( treeRoot.lastChild );
    }
  },
  
  checkForDuplicates: function( value ) {
    var selectedRec = this.repoTargetsGridPanel.getSelectionModel().getSelected();
    var result = this.repoTargetsDataStore.findBy( function(rec, id) {
        return selectedRec != rec && rec.get('name') == value;
      });
    if ( result >= 0 ) {
      return 'A target with this name already exists.';
    }
    return true;
  }
  
});