Track Vimeo Player with Google Tag Manager

<script>

var dataLayer = (typeof(dataLayer) !== "undefined" && dataLayer instanceof Array) ? dataLayer : [];
var videoLabels=[];
var lastP=[];

//we declare variables that will hold information about the video being played
var _playerTitle = {}, _playerAuthor = {}, _playerAuthorURL = {}, _playerUploadDate = {};

try{
 init();
}
catch(err){
 dataLayer.push({
 'event': 'gtm.error',
 'errorMessage': e.message,
 'tag': 'Vimeo Video Listener'
 })
}
function init(){
 try{
 var player=document.getElementsByTagName("iframe");
 for (i = 0; i < player.length; ++i) {
 var url=player[i].getAttribute("src");

 if(/player\.vimeo\.com\/video/.test(url)){ // vimeo iframe found
 if(!player[i].hasAttribute("id")){ // id attribute missing
 player[i].setAttribute("id","vimeo_id_"+i); // add id attribute
 }
 var urlUpdated=false;
 if(!/api=/.test(url)){ // check to see if api parameter is in src attribute
 url=updateUrl(url,"api",1);
 urlUpdated=true;
 }

 if(!/player_id=/.test(url)){ // check if player_id is in src attribute
 url=updateUrl(url,"player_id",player[i].getAttribute("id"));
 urlUpdated=true;
 }
 if(urlUpdated){ // repopulate src attribute with added parameters
 player[i].setAttribute("src",url)
 }
 videoLabels[player[i].getAttribute("id")]=player[i].getAttribute("src"); // id to label dictionary
 }
 }

 // Listen for messages from the player
 if (window.addEventListener){
 window.addEventListener('message', onMessageReceived, false);
 }
 else {
 window.attachEvent('onmessage', onMessageReceived, false);
 }
 }
 catch(err){
 }
}

function updateUrl(url,param,value){
 try{
 return url+((/\?/.test(url)) ? "&" : "?")+param+"="+value;
 }
 catch(err){
 }
}

// Handle messages received from the player
function onMessageReceived(e) {
 try{
 var data = e.data;

 if(typeof data === "string"){
 data = JSON.parse(data);
 }

 switch (data.event) {
 case 'ready':
 onReady(data);
 break;
 case 'play':
 onPlay(data);
 break;
 case 'pause':
 onPause(data);
 break;
 case 'timeupdate':
 onPlayProgress(data);
 break;
 }
 }
 catch(err){
 }
}

// Helper function for sending a message to the player
function post(action, value) {
 try{
 var data = {
 method: action
 };

 if (value) {
 data.value = value;
 }

 var message = JSON.stringify(data);
 var player = document.getElementsByTagName("iframe");
 var url;
 var prot;


 for (i = 0; i < player.length; ++i) {
 url=player[i].getAttribute("src");

 if(/player\.vimeo\.com\/video/.test(url)){
 // Check if protocol exists
 prot = player[i].getAttribute('src').split('?')[0].split('//')[0];

 // If protocol doesn't exist, then need to append to "url"
 if (!prot){
 url="https:" + player[i].getAttribute("src").split('?')[0];
 }
 player[i].contentWindow.postMessage(data, url);
 }
 }
 }
 catch(err){
 }
}

function getLabel(id){
 try{
 return videoLabels[id].split('?')[0].split('/').pop();
 }
 catch(err){
 }
}

//our function that will use the Vimeo oEmbed API to retrieve additional information about the video
function getVimeoInfo(url, callback) {

 var script = document.createElement('script');
 script.type = 'text/javascript';
 script.src = url;

 document.getElementsByTagName('body')[0].appendChild(script);
}

//the callback function which takes the data received from the Vimeo oEmbed API and places it into the corresponding objectes
function vimeoCallback(e){
 //console.log(e);
 _playerTitle[e['video_id']] = e['title'];
 _playerAuthor[e['video_id']] = e['author_name']
 _playerAuthorURL[e['video_id']] = e['author_url']
 _playerUploadDate[e['video_id']] = e['upload_date']
}

function onReady(data) {
 try{
 //execute our function which queries the Vimeo oEmbed API once the embedded videos are "ready"
 getVimeoInfo("https://www.vimeo.com/api/oembed.json?url=https://vimeo.com/"+getLabel(data.player_id)+"&callback=vimeoCallback", vimeoCallback);

 post('addEventListener', 'play');
 post('addEventListener', 'pause');
 post('addEventListener', 'finish');
 post('addEventListener', 'playProgress');
 }
 catch(err){
 }
}

function onPlay(data){
 try{
 var t = data.data.duration - data.data.seconds <= 1.5 ? 1 : (Math.floor(data.data.seconds / data.data.duration * 4) / 4).toFixed(2);
 dataLayer.push({
 event: "video",
 video_action: "play",
 video_url: 'https://vimeo.com/' + getLabel(data.player_id),
 video_percent: data.data.percent.toFixed(2) * 100,
 video_title: _playerTitle[getLabel(data.player_id)].toLowerCase()
 });
 }
 catch(err){
 }
}

function onPause(data){
 try{
 var t = data.data.duration - data.data.seconds <= 1.5 ? 1 : (Math.floor(data.data.seconds / data.data.duration * 4) / 4).toFixed(2);
 dataLayer.push({
 event: "video",
 video_action: "pause",
 video_url: 'https://vimeo.com/' + getLabel(data.player_id),
 video_percent: data.data.percent.toFixed(2) * 100,
 video_title: _playerTitle[getLabel(data.player_id)].toLowerCase()
 });
 }
 catch(err){
 }
}

// Track progress: 25%, 50%, 75%, 100%
function onPlayProgress(data) {
 try{
 var t = data.data.duration - data.data.seconds <= 1.5 ? 1 : (Math.floor(data.data.seconds / data.data.duration * 4) / 4).toFixed(2); if (!lastP[data.player_id] || t > lastP[data.player_id]) {
 lastP[data.player_id]=t;
 if (parseFloat(t) != 0){
 dataLayer.push({
 event: "video",
 video_action: "progress",
 video_url: 'https://vimeo.com/' + getLabel(data.player_id),
 video_percent: t * 100,
 video_title: _playerTitle[getLabel(data.player_id)].toLowerCase()
 })
 }
 }
 }
 catch(err){
 }
}
</script>