vkAudio content

function handleDownload() {
}

//listen from background
chrome.runtime.onMessage.addListener(function(msg, sender, sendResponse) {
    switch (msg.key) {
        case "audio":
            modify_audio_list(msg.imgUrl);
            break;
    }
    return true;
});

function modify_audio_list(imgSkullUrl) {

    if (-1 == url.indexOf("act=feed")) {

        var songs_block = document.getElementById("initial_list");
        var songs = document.getElementsByClassName("audio  fl_l");

        var d_btn = '<div class="d_btn" style="display: block; height: 18px; width: 18px; margin-left: 20px; z-index: 1000000;"></div>';
        var d_link = '<div class="d_link">' +
                        '<a class="d_inner_link" href="" title="Yohoho! Download it!">' +
                            '<img src="' + imgSkullUrl + '" alt="" height="18px" width="18px">' +
                        '</a>' +
                     '</div>';
        var d_name = '<div class="d_name" style="display: none;">' +
                        '<div class="d_title"></div>' +
                        '<div class="d_artist"></div>' +
                     '</div>';

        for (i = 0; i < songs.length; i++) {

            if (0 == songs[i].getElementsByClassName("d_btn").length) {

                //add download button
                var button_block = songs[i].getElementsByClassName("play_new")[0];
                button_block.innerHTML += d_btn;


                //modify song_name's block
                var name_block = songs[i].getElementsByClassName("info fl_l")[0];
                name_block.style.width = "370px";
                name_block.style.height = "33px";
                name_block.style.marginLeft = "20px";

                //modify download button
                var d_b = songs[i].getElementsByClassName("d_btn")[0];
                d_b.style.cursor = "default";
                d_b.style.backgroundColor = "white";
                d_b.style.borderRadius = "3px";
                d_b.style.border = "1px solid #45668e";

                //prevent auto play
                d_b.addEventListener('click', handleDownload());

                //add content link and song_name
                d_b.innerHTML += d_link;
                d_b.innerHTML += d_name;


                //modify href
                d_l = songs[i].getElementsByTagName("input")[0].value;
                d_b.getElementsByClassName("d_inner_link")[0].href = d_l;

                //get song_title and artist
                var artist = songs[i].getElementsByClassName("title_wrap fl_l")[0].getElementsByTagName("a")[0].innerText;
                var title = songs[i].getElementsByClassName("title_wrap fl_l")[0].getElementsByClassName("title")[0].innerText;
                songs[i].getElementsByClassName("d_artist")[0].innerText = artist;
                songs[i].getElementsByClassName("d_title")[0].innerText = title;


                /*d_b.getElementsByClassName("d_link")[0].addEventListener("click", function(e) {
                    alert(d_b.getElementsByClassName("d_inner_link")[0].href);
                    alert(this.innerHTML);

                    var editorExtensionId = "ljoihmfhdlaibefabobnmgggmfblioij";
                    chrome.runtime.sendMessage(editorExtensionId, {key: "download"}, function(response) {});

                    chrome.runtime.sendMessage({
                        key: "download",
                        data: songs[i].getElementsByClassName("d_name")[0].innerText
                    });

                    e.stopPropagation();

                });*/

            }


        }

        var vk_script = document.createElement('script');
        vk_script.src = chrome.extension.getURL('vk_script_event.js');
        (document.head || document.documentElement).appendChild(vk_script);
        vk_script.onload = function() {
            vk_script.parentNode.removeChild(vk_script);
        };

    }
}