90 lines
2.5 KiB
JavaScript
90 lines
2.5 KiB
JavaScript
'use strict';
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var client = new XMLHttpRequest();
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var channel = findGetParameter('channel');
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var duration = getInterval('duration');
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var interval = getInterval('interval');
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/**
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* @function
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* @description Processes the incoming packet.
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*/
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client.onload = function () {
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if (client.readyState === client.DONE) {
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if (this.status === 200 && this.responseXML !== null) {
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/* Gets current track */
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var current = this.responseXML.getElementsByTagName('song')[0];
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var artistTrack = current.getElementsByTagName('artist')[0].textContent;
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var titleTrack = current.getElementsByTagName('title')[0].textContent;
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/* Gets items on the page */
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var displayElement = document.getElementById('display');
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var artistElement = document.getElementById('artist');
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var titleElement = document.getElementById('title');
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if (artistElement.textContent !== artistTrack || titleElement.textContent !== titleTrack) {
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/* Updates text */
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artistElement.textContent = artistTrack;
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titleElement.textContent = titleTrack;
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/* Displays a pop-up window */
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displayElement.style['animation-name'] = 'fadeIn';
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setTimeout(function () {
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/* Removes a pop-up window */
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displayElement.style['animation-name'] = 'fadeOut';
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}, duration);
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}
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}
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}
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};
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/**
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* @function
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* @description Cyclical sending a request to update the information.
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*/
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setInterval(function tick() {
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client.open('GET', '//somafm.com/songs/' + channel + '.xml');
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client.send();
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return tick;
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}(), interval);
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/**
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* @function
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* @param {String} parameterName - Variable name
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* @returns {String} Value of variable
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* @description Searches for the value of the GET variable on the page.
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*/
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function findGetParameter(parameterName) {
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var result = null;
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var tmp = [];
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var items = window.location.search.substr(1).split('&');
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for (var index = 0; index < items.length; index++) {
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tmp = items[index].split('=');
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if (tmp[0] === parameterName) {
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result = decodeURIComponent(tmp[1]);
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}
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}
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return result;
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}
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/**
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* @function
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* @param {String} parameterName - Variable name
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* @returns {Number} Timer value, default 10 seconds
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* @description Gets the settings for the specified timer.
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*/
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function getInterval(parameterName) {
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var value = findGetParameter(parameterName);
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var interval = parseInt(value, 10);
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var result = 10000;
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if (isNaN(interval) === false) {
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result = interval;
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}
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return result;
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}
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