/**
 * created by zhangbo21 on 14-9-2.
 */
/*
 * getkfcontent : 将image的src从base64替换为文件名
 * param : callback -- 回调函数 其参数为替换之后的内容
 * return : void
 * */

ue.editor.prototype.getkfcontent = function(callback){

    var me = this;
    var actionurl = me.getactionurl(me.getopt('scrawlactionname')),
        params = ue.utils.serializeparam(me.querycommandvalue('serverparam')) || '',
        url = ue.utils.formaturl(actionurl + (actionurl.indexof('?') == -1 ? '?':'&') + params);

    // 找到所有的base64
    var count = 0;
    var imgs =me.body.getelementsbytagname('img');
    var base64imgs = [];
    ue.utils.each(imgs, function(item){
        var imgtype = item.getattribute('src').match(/^[^;]+/)[0];
        if ( imgtype === 'data:image/png') {
            base64imgs.push(item);
        }    
    });

    if (base64imgs.length == 0){
        execcallback();
    } else {
        ue.utils.each(base64imgs, function(item){

            var opt ={};
            opt[me.getopt('scrawlfieldname')]= item.getattribute('src').replace(/^[^,]+,/, '');
            opt.onsuccess = function(xhr){
                var json = ue.utils.str2json(xhr.responsetext),
                    url = me.options.scrawlurlprefix + json.url;

                item.setattribute('src', url);
                item.setattribute('_src', url);

                count++;

                execcallback();
            }
            opt.onerror = function(err){
                console.error(err);
                count++;

                execcallback();
            }


            ue.ajax.request(url, opt);

        });
    }

    function execcallback(){
        if (count >= base64imgs.length) {
            ue.sync();
            callback(me.getcontent());
        }
    }

};