Pandora functions

pandora.js

function clickButton(className, index) {
    var buttons = document.getElementsByClassName(className);
    console.log(buttons);

    if (index < buttons.length) {
        buttons[index].click();
    }
}

function getCurrentTrack() {
    this.isThumbed = function(direction) {
        var thumb = document.getElementById("thumb" + direction);
        return thumb != null && thumb.attributes['style'].value.indexOf("none") == -1;
    }

    this.songInfo = function(className) {
        var nodes = document.getElementsByClassName(className);
        return nodes != null && nodes.length > 0 && nodes[0].innerText;
    }

    return {
        songTitle:      this.songInfo("songTitle"),
        songArtist:     this.songInfo("artistSummary"),
        albumTitle:     this.songInfo("albumTitle"),
        isThumbedUp:    this.isThumbed("up"),
        isThumbedDown:  this.isThumbed("down"),
        playSong:       function() { clickButton("playButton",  0); },
        pauseSong:      function() { clickButton("pauseButton", 0); },
        thumbUpSong:    function() { clickButton("thumbUpButton", 0); },
        thumbDownSong:  function() { clickButton("thumbDownButton", 0); }
    }
}

function getCurrentStationTitle() {
    var nodes = document.getElementsByClassName("stationListItem selected");

    return nodes != null && nodes.length > 0 && nodes[0].children[0].children[0].children[0].innerText;
}