/*
This file is part of Ext JS 3.4

Copyright (c) 2011-2013 Sencha Inc

Contact:  http://www.sencha.com/contact

GNU General Public License Usage
This file may be used under the terms of the GNU General Public License version 3.0 as
published by the Free Software Foundation and appearing in the file LICENSE included in the
packaging of this file.

Please review the following information to ensure the GNU General Public License version 3.0
requirements will be met: http://www.gnu.org/copyleft/gpl.html.

If you are unsure which license is appropriate for your use, please contact the sales department
at http://www.sencha.com/contact.

Build date: 2013-04-03 15:07:25
*/
Ext.define('FeedWindow', {

    extend: 'Ext.Window',
    
    constructor: function() {
        this.feedUrl = new Ext.form.ComboBox({
            id: 'feed-url',
            fieldLabel: 'Enter the URL of the feed to add',
            emptyText: 'http://example.com/blog/feed',
            width: 450,
            validationEvent: false,
            validateOnBlur: false,
            msgTarget: 'under',
            triggerAction: 'all',
            displayField: 'url',
            mode: 'local',

            listeners:{
                valid: this.syncShadow,
                invalid: this.syncShadow,
                scope: this
            },
            tpl: new Ext.XTemplate(
                    '<tpl for="."><div class="x-combo-list-item">',
                    '<em>{url}</em><strong>{text}</strong>',
                    '<div class="x-clear"></div>',
                    '</div></tpl>'),
            store: new Ext.data.ArrayStore({
                fields: ['url', 'text'],
                data : this.defaultFeeds
            })
        });

        this.form = new Ext.FormPanel({
            labelAlign:'top',
            items:this.feedUrl,
            border: false,
            bodyStyle:'background:transparent;padding:10px;'
        });

        this.callParent([{
            title: 'Add Feed',
            iconCls: 'feed-icon',
            id: 'add-feed-win',
            autoHeight: true,
            width: 500,
            resizable: false,
            plain:true,
            modal: true,
            y: 100,
            autoScroll: true,
            closeAction: 'hide',

            buttons:[{
                text: 'Add Feed!',
                handler: this.onFeedAdd,
                scope: this
            },{
                text: 'Cancel',
                handler: this.hide.createDelegate(this, [])
            }],

            items: this.form
        }]);

        this.addEvents({add:true});
    },

    defaultFeeds : [
        ['http://www.divergingpath.com/rss.cfm?mode=full', 'Aaron Conran\'s Blog'],
        ['http://feeds.yuiblog.com/YahooUserInterfaceBlog',  'Yahoo! UI Blog'],
        ['http://feeds.feedburner.com/jquery/', 'jQuery Blog'],
        ['http://sports.yahoo.com/nba/rss.xml', 'NBA News'],
        ['http://feeds.dzone.com/dzone/frontpage', 'DZone.com']
    ],

    show : function(){
        if(this.rendered){
            this.feedUrl.setValue('');
        }
        FeedWindow.superclass.show.apply(this, arguments);
    },

    onFeedAdd: function() {
        this.el.mask('Validating Feed...', 'x-mask-loading');
        var url = this.feedUrl.getValue();
        Ext.Ajax.request({
            url: 'feed-proxy.php',
            params: {feed: url},
            success: this.validateFeed,
            failure: this.markInvalid,
            scope: this,
            feedUrl: url
        });
    },

    markInvalid : function(){
        this.feedUrl.markInvalid('The URL specified is not a valid RSS2 feed.');
        this.el.unmask();
    },

    validateFeed : function(response, options){
        var dq = Ext.DomQuery;
        var url = options.feedUrl;

        try{
            var xml = response.responseXML;
            var channel = xml.getElementsByTagName('channel')[0];
            if(channel){
                var text = dq.selectValue('title', channel, url);
                var description = dq.selectValue('description', channel, 'No description available.');
                this.el.unmask();
                this.hide();

                return this.fireEvent('validfeed', {
                    url: url,
                    text: text,
                    description: description
                });
            }
        }catch(e){
        }
        this.markInvalid();
    }
});
