lyrics for Astral Radio player

lyrics.user.js

// ==UserScript==
// @name        lyrics for Astral Radio player
// @description Check http://proxy.amri.ca/ or https://en.wikipedia.org/wiki/Bell_Media_Radio for a list
// @namespace   localhost
// @include     http://player.chumfm.com/
// @version     0.1
// @grant       GM_xmlhttpRequest
// ==/UserScript==

addEventListener("load",function(){
    var lyricsDiv=document.createElement("div"),container=document.getElementById("pageContainer");
    lyricsDiv.style.position="absolute";
    lyricsDiv.style.width="200px";
    lyricsDiv.style.height="300px";
    lyricsDiv.style.backgroundColor="rgba(255,255,255,.8)";
    lyricsDiv.style.zIndex=100;
    lyricsDiv.style.padding=".5em";
    lyricsDiv.style.paddingLeft="1.5em";
    lyricsDiv.style.textIndent="-1em";
    //lyricsDiv.style.fontSize="150%";
    lyricsDiv.style.overflowY="auto";
    lyricsDiv.innerHTML="<i>loading…</i>";
    container.insertBefore(lyricsDiv,container.firstChild);
    
    var curUrl=null;
    unsafeWindow.livePlayer.createNpSongString=(function(wrapped){
        return function(){
            var ret=wrapped.apply(this,arguments);
            if(this.metadata){
                //console.log("metadata",this.metadata);
                var song=this.metadata.nowplaying.currentTrack,url="http://lyrics.wikia.com/api.php?artist="+encodeURIComponent(song.artistName)+"&song="+encodeURIComponent(song.trackName)+"&fmt=realjson";
                //console.log("url",url);
                if(url==curUrl)
                    return;
                curUrl=url;
                function updateLyrics(lyrics){
                    if(url!=curUrl)
                        return;
                    if(lyrics==null)
                        lyricsDiv.innerHTML="<i>could not find lyrics</i>";
                    else if(typeof lyrics=="string")
                        lyrics=document.createTextNode(lyrics);
                    console.log("lyrics",lyrics);
                    lyricsDiv.innerHTML="";
                    lyricsDiv.appendChild(lyrics);
                }
                setTimeout(function(){
                    try{
                        GM_xmlhttpRequest({
                            url:url,
                            onerror:console.error,
                            onload:function(data){
                                //console.log("got data");
                                //console.log("data",data);
                                if(url!=curUrl)
                                    return;
                                //console.log("good url");
                                var obj=JSON.parse(data.responseText);
                                //console.log("parsed",obj);
                                if(/&amp;action=edit$/.test(obj.url)){
                                    updateLyrics(null);
                                    return;
                                }
                                updateLyrics(obj.lyrics);
                                //console.log("full lyrics",obj.url);
                                GM_xmlhttpRequest({
                                    url:obj.url,
                                    onerror:console.error,
                                    onload:function(data){
                                        //console.log("data2",data);
                                        if(url!=curUrl)
                                            return;
                                        //console.log("good url2");
                                        try{
                                            var html=data.responseText.match(/^<div class='lyricbox'>.*<\/div>(.*)<!-- $/m)[1];
                                            console.log("html",html);
                                            var div=document.createElement("div"),df=document.createDocumentFragment();
                                            div.innerHTML=html;
                                            for(var i=0,a=div.childNodes;i<a.length;++i)
                                                switch(a[i].nodeType){
                                                    case Node.ELEMENT_NODE:
                                                        switch(a[i].nodeName){
                                                            case"BR":
                                                                if(df.childNodes.length){
                                                                    var prev=df.childNodes[df.childNodes.length-1];
                                                                    if(prev.nodeType==Node.ELEMENT_NODE&&prev.nodeName=="BR")
                                                                        continue;
                                                                }
                                                                df.appendChild(a[i]);
                                                                continue;
                                                            case"B":
                                                            case"I":
                                                            case"U":
                                                            case"STRONG":
                                                            case"EM":
                                                            case"SPAN":
                                                                var elt=document.createElement(a[i].nodeName);
                                                                elt.textContent=a[i].textContent;
                                                                //console.log("elt",elt);
                                                                df.appendChild(elt);
                                                            default:
                                                                continue;
                                                        }
                                                    case Node.TEXT_NODE:
                                                        //console.log("text",a[i]);
                                                        var p=document.createElement("p");
                                                        p.appendChild(a[i]);
                                                        df.appendChild(p);
                                                        df.appendChild(document.createElement("br"));
                                                        break;
                                                }
                                            console.log("df",df);
                                            updateLyrics(df);
                                        }catch(e){
                                            console.error(e);
                                        }
                                    },
                                });
                            },
                        });
                    }catch(e){
                        console.log("caught error");
                        console.error(e);
                    }
                });
            }
            return ret;
        };
    })(unsafeWindow.livePlayer.createNpSongString);
},false);