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'use strict';
/**
* @param {String} artistTrack - Artist of the track
* @param {String} titleTrack - Name of the track
* @description Updates the data on the page. Displays a pop-up window if the
* data has changed.
*/
function updateData(artistTrack, titleTrack) {
/* Gets items on the page */
var displayElement = document.getElementById('display');
var artistElement = document.getElementById('artist');
var titleElement = document.getElementById('title');
if (artistElement.innerHTML !== artistTrack || titleElement.innerHTML !== titleTrack) {
/* Updates text */
artistElement.innerHTML = artistTrack;
titleElement.innerHTML = titleTrack;
/* Displays a pop-up window */
displayElement.style['animation-name'] = 'fadeIn';
setTimeout(function () {
/* Removes a pop-up window */
displayElement.style['animation-name'] = 'fadeOut';
}, 3000);
}
}
var client = new XMLHttpRequest();
var url = 'https://somafm.com/songs/defcon.xml';
/* Processes response */
client.onload = function () {
if (client.readyState === client.DONE) {
if (this.status === 200 && this.responseXML !== null) {
/* Gets current track */
var current = this.responseXML.getElementsByTagName('song')[0];
var artist = current.getElementsByTagName('artist')[0].textContent;
var title = current.getElementsByTagName('title')[0].textContent;
/* Updates data */
updateData(artist, title);
}
}
};
/* Update cycle */
setInterval(function () {
client.open('GET', url);
client.send();
}, 5000);
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