jquery.youtube-background.js

/* jquery.youtube-background v1.0.7 | Nikola Stamatovic <@stamat> | MIT */

var tag = document.createElement('script');
tag.src = "https://www.youtube.com/player_api";
var firstScriptTag = document.getElementsByTagName('script')[0];
firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);


//native addClass, removeClass, hasClass and toggleClass
if (!window.hasOwnProperty('d0')) {
	window.d0 = {};

	d0.hasClass = function(element, className) {
		if (element.classList) {
			return element.classList.contains(className);
		}
	    return new RegExp('\\b'+ className+'\\b').test(element.className);
	};

	d0.addClass = function(element, className) {
	    if (element.classList) {
			element.classList.add(className);
			return;
		}

		if (!d0.hasClass(element, className)) {
			element.className += ' ' + className;
		}
	};

	d0.removeClass = function(element, className) {
	    if (element.classList) {
			element.classList.remove(className);
			return;
		}

		element.className = element.className.replace(new RegExp('\\b'+ className+'\\b', 'g'), '');
	};

	d0.toogleClass = function(element, className) {
	    if (d0.hasClass(element, className)) {
			d0.removeClass(element, className);
		} else {
			d0.addClass(element, className);
		}
	};
}

function YoutubeBackground(elem, params, id, uid) {
	this.is_mobile = this.isMobile();

	this.element = elem;
	this.ytid = id;
	this.uid = uid;
	this.player = null;
	this.buttons = {};

	this.state = {};
	this.state.play = false;
	this.state.mute = false;

	this.params = {};

	this.defaults = {
		'pause': false, //deprecated
		'play-button': false,
		'mute-button': false,
		'autoplay': true,
		'muted': true,
		'loop': true,
		'mobile': false,
		'load-background': true,
		'resolution': '16:9',
		'offset': 200
	};

	this.__init__ = function () {
		if (!this.ytid) {
			return;
		}

		this.parseProperties(params);
		this.params.resolution_mod = this.parseResolutionString(this.params.resolution);
		this.state.playing = this.params.autoplay;
		this.state.muted = this.params.muted;

		this.buildHTML();
		this.injectIFrame();


		if (this.params['play-button']) {
			this.generateActionButton({
				name: 'play',
				className: 'play-toggle',
				innerHtml: '<i class="fa"></i>',
				initialState: false,
				stateClassName: 'paused',
				condition_parameter: 'autoplay',
				stateChildClassNames: ['fa-pause-circle', 'fa-play-circle'],
				actions: ['play', 'pause']
			});
		}

		if (this.params['mute-button']) {
			this.generateActionButton({
				name: 'mute',
				className: 'mute-toggle',
				innerHtml: '<i class="fa"></i>',
				initialState: true,
				stateClassName: 'muted',
				condition_parameter: 'muted',
				stateChildClassNames: ['fa-volume-up', 'fa-volume-mute'],
				actions: ['unmute', 'mute']
			});
		}
	}

	this.__init__();
}

YoutubeBackground.prototype.initYTPlayer = function () {
	var self = this;

	if (window.hasOwnProperty('YT')) {
		this.player = new YT.Player(this.uid, {
			events: {
				'onReady': function(event) {
					self.onVideoPlayerReady(event);
				},
				'onStateChange': function(event) {
					self.onVideoStateChange(event);
				},
				'onError' : function(event) {
					//console.error('player_api', event);
				}
			}
		});
	}
};

YoutubeBackground.prototype.onVideoPlayerReady = function (event) {
	if (this.params.autoplay) {
		event.target.playVideo();
	}
};

YoutubeBackground.prototype.onVideoStateChange = function (event) {
	if (event.data === 0 && this.params.loop) {
		event.target.playVideo();
	}

	if (event.data === -1 && this.params.autoplay) {
		event.target.playVideo();
	}

	if (event.data === 1) {
		this.iframe.style.opacity = 1;
	}
};

YoutubeBackground.prototype.parseProperties = function (params) {
	if (!params) {
		this.params = this.defaults;
	} else {
		//load in defaults
		for (var k in this.defaults) {
			if (!this.params.hasOwnProperty(k)) {
				this.params[k] = this.defaults[k];
			}
		}
	}

	// load params from data attributes
	for (var k in this.params) {
		var data = this.element.getAttribute('data-ytbg-'+k);

		if (data !== undefined && data !== null) {
			switch (data) {
				case data === 'false':
					data = false;
					break;
				case data === 'true':
					data = true;
					break;
			}

			this.params[k] = data;
		}
	}

	//pause deprecated
	if (this.params.pause) {
		this.params['play-button'] = this.params.pause;
	}
};

YoutubeBackground.prototype.injectIFrame = function () {
	this.iframe = document.createElement('iframe');
	this.iframe.setAttribute('frameborder', 0);
	this.iframe.setAttribute('allow', ['autoplay; mute']);
	var src = 'https://www.youtube.com/embed/'+this.ytid+'?enablejsapi=1&disablekb=1&controls=0&rel=0&iv_load_policy=3&cc_load_policy=0&playsinline=1&showinfo=0&modestbranding=1&fs=0&origin='+window.location.origin;

	if (this.params.muted) {
		src += '&mute=1';
	}

	if (this.params.autoplay) {
		src += '&autoplay=1';
	}

	if (this.params.loop) {
		src += '&loop=1';
	}

	this.iframe.src = src;

	if (this.uid) {
		this.iframe.id = this.uid;
	}

	this.iframe.style.top = '50%';
	this.iframe.style.left = '50%';
	this.iframe.style.transform = 'translateX(-50%) translateY(-50%)';
	this.iframe.style.position = 'absolute';
	this.iframe.style.opacity = 0;

	this.element.parentNode.appendChild(this.iframe);
	this.iframe.parentNode.removeChild(this.element);

	var self = this;

	function onResize() {
		var h = self.iframe.parentNode.offsetHeight + self.params.offset; // since showinfo is deprecated and ignored after September 25, 2018. we add +200 to hide it in the overflow
		var w = self.iframe.parentNode.offsetWidth + self.params.offset;
		var res = self.params.resolution_mod;

		if (res > w/h) {
			self.iframe.style.width = h*res + 'px';
			self.iframe.style.height = h + 'px';
		} else {
			self.iframe.style.width = w + 'px';
			self.iframe.style.height = w/res + 'px';
		}
	}

	window.addEventListener('resize', onResize);
	onResize();
};

YoutubeBackground.prototype.buildHTML = function () {
	var parent = this.element.parentNode;
	// wrap
	var wrapper = document.createElement('div');
	wrapper.className = 'youtube-background';
	parent.insertBefore(wrapper, this.element);
	wrapper.appendChild(this.element);
	var id = this.element.id;
	this.element.id = '';
	wrapper.id = id;

	//set css rules
	var wrapper_styles = {
		"height" : "100%",
		"width" : "100%",
		"z-index": "0",
		"position": "absolute",
		"overflow": "hidden",
		"top": 0, // added by @insad
		"left": 0,
		"bottom": 0,
		"right": 0
	};

	if (!this.params['mute-button']) {
		wrapper_styles["pointer-events"] = "none" // avoid right mouse click popup menu
	}

	if (this.params['load-background']) {
		wrapper_styles['background-image'] = 'url(https://img.youtube.com/vi/'+this.ytid+'/maxresdefault.jpg)';
		wrapper_styles['background-size'] = 'cover';
		wrapper_styles['background-repeat'] = 'no-repeat';
		wrapper_styles['background-position'] = 'center';
	}

	for (var property in wrapper_styles) {
		wrapper.style[property] = wrapper_styles[property];
	}

	wrapper.parentNode.style.position = 'relative';

	if (this.is_mobile && !this.params.mobile) {
		return wrapper;
	}

	// set play/mute controls wrap
	if (this.params['play-button'] || this.params['mute-button']) {
		var controls = document.createElement('div');
		controls.className = 'video-background-controls';

		controls.style.position = 'absolute';
		controls.style.top = '10px';
		controls.style.right = '10px';
		controls.style['z-index'] = 2;

		this.controls_element = controls;
		wrapper.parentNode.appendChild(controls);
	}

	return wrapper;
};

YoutubeBackground.prototype.play = function () {
	if (this.buttons.hasOwnProperty('play')) {
		var btn_obj = this.buttons.play;
		d0.removeClass(btn_obj.element, btn_obj.button_properties.stateClassName);
		d0.addClass(btn_obj.element.firstChild, btn_obj.button_properties.stateChildClassNames[0])
		d0.removeClass(btn_obj.element.firstChild, btn_obj.button_properties.stateChildClassNames[1]);
	}

	if (this.player) {
		this.player.playVideo();
	}
}

YoutubeBackground.prototype.pause = function () {
	if (this.buttons.hasOwnProperty('play')) {
		var btn_obj = this.buttons.play;
		d0.addClass(btn_obj.element, btn_obj.button_properties.stateClassName);
		d0.removeClass(btn_obj.element.firstChild, btn_obj.button_properties.stateChildClassNames[0])
		d0.addClass(btn_obj.element.firstChild, btn_obj.button_properties.stateChildClassNames[1]);
	}

	if (this.player) {
		this.player.pauseVideo();
	}
}

YoutubeBackground.prototype.unmute = function () {
	if (this.buttons.hasOwnProperty('mute')) {
		var btn_obj = this.buttons.mute;
		d0.removeClass(btn_obj.element, btn_obj.button_properties.stateClassName);
		d0.addClass(btn_obj.element.firstChild, btn_obj.button_properties.stateChildClassNames[0])
		d0.removeClass(btn_obj.element.firstChild, btn_obj.button_properties.stateChildClassNames[1]);
	}

	if (this.player) {
		this.player.unMute();
	}
}

YoutubeBackground.prototype.mute = function () {
	if (this.buttons.hasOwnProperty('mute')) {
		var btn_obj = this.buttons.mute;
		d0.addClass(btn_obj.element, btn_obj.button_properties.stateClassName);
		d0.removeClass(btn_obj.element.firstChild, btn_obj.button_properties.stateChildClassNames[0])
		d0.addClass(btn_obj.element.firstChild, btn_obj.button_properties.stateChildClassNames[1]);
	}

	if (this.player) {
		this.player.mute();
	}
}

//TODO: refactor states to be equal for all buttons
YoutubeBackground.prototype.generateActionButton = function (obj) {
	var btn = document.createElement('button');
	btn.className = obj.className;
	btn.innerHTML = obj.innerHtml;
	d0.addClass(btn.firstChild, obj.stateChildClassNames[0]);

	if (this.params[obj.condition_parameter] == obj.initialState) {
		d0.addClass(btn, obj.stateClassName);
		d0.removeClass(btn.firstChild, obj.stateChildClassNames[0]);
		d0.addClass(btn.firstChild, obj.stateChildClassNames[1]);
	}

	var self = this;
	btn.addEventListener('click', function(e) {
		if (d0.hasClass(this, obj.stateClassName)) {
			self.state[obj.name] = false;
			self[obj.actions[0]]();
		} else {
			self.state[obj.name] = true;
			self[obj.actions[1]]();
		}
	});

	this.buttons[obj.name] = {
		element: btn,
		button_properties: obj
	};

	this.controls_element.appendChild(btn);
};


YoutubeBackground.prototype.parseResolutionString = function (res) {
	var pts = res.split(/\s?:\s?/i);
	if (pts.length < 2) {
		return 16/9;
	}

	var w = parseInt(pts[0], 10);
	var h = parseInt(pts[1], 10);

	if (isNaN(w) || isNaN(h)) {
		return 16/9;
	}

	return w/h;
};

YoutubeBackground.prototype.isMobile = function (event) {
	var is_mobile = false;
	(function(a){if(/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(a)||/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0,4))) is_mobile = true;})(navigator.userAgent||navigator.vendor||window.opera);

	return is_mobile;
};

YoutubeBackground.prototype.error = function (message, value) {
	if (window.hasOwnProperty('console')
		&& window.console.hasOwnProperty('error')) {
		console.error(message, value);
	}
};

function ActivityMonitor(on_activity, on_inactivity, activity_timeout, inactivity_timeout, events) {
	this.timer = null;
	this.timeout = inactivity_timeout || 10000;
	this.activity_timer = null; //for event throttling
	this.activity_timeout = activity_timeout || 1000;
	this.last_activity = null;

	this.resetTimer = function() {
		if (this.timer) {
			clearTimeout(this.timer);
			this.timer = null;
		}

		var self = this;
		this.timer = setTimeout(function() {
			if (self.last_activity + self.timeout + self.activity_timeout
				>= new Date().getTime()) {
					if (on_inactivity) {
						on_inactivity();
					}
			}
		}, this.timeout);
	};

	this.logActivity = function() {
		this.last_activity = new Date().getTime();

		if (on_activity) {
			on_activity();
		}
	};

	this.onActivity = function() {
		if (!this.activity_timer) {
			var self = this;
			this.activity_timer = setTimeout(function(){
				self.logActivity();
				self.resetTimer();

				clearTimeout(self.activity_timer);
				self.activity_timer = null;
			}, this.activity_timeout);
		}
	};

	this.__init__ = function() {
		var self = this;

		if (!events) {
			events = ['click', 'mousemove', 'scroll'];
		} else {
			if (typeof events === 'string') {
				events = [events];
			}
		}

		for (var i = 0; i < events.length; i++) {
			document.addEventListener(events[i], function() {
				self.onActivity();
			});
		}
	};

	this.__init__();
}

function VideoBackgrounds(selector, params) {
	this.elements = selector;

	if (typeof selector === 'string') {
		this.elements = document.querySelectorAll(selector);
	}

	this.index = {};
	this.re = {};
	this.re.YOUTUBE = /(?:youtube\.com\/(?:[^\/]+\/.+\/|(?:v|e(?:mbed)?)\/|.*[?&]v=)|youtu\.be\/)([^"&?\/ ]{11})/i;

	this.__init__ = function () {
		for (var i = 0; i < this.elements.length; i++) {
			var element = this.elements[i];

			var link = element.getAttribute('data-youtube');
			var ytid = this.getYTID(link);
			var uid = this.generateUID(ytid);

			var yb = new YoutubeBackground(element, params, ytid, uid);

			if (!uid) {
				continue;
			}

			this.index[uid] = yb;
		}

		var self = this;

		this.initYTPlayers(function() {
			//TODO: FIX!
			if (params &&
				(params.hasOwnProperty('activity_timeout')
				|| params.hasOwnProperty('inactivity_timeout'))) {
					this.activity_monitor = new ActivityMonitor(function () {
						self.playVideos();
					}, function() {
						self.pauseVideos();
					},
					params ? params.activity_timeout : null,
					params ? params.inactivity_timeout : null,
					['mousemove', 'scroll']
				);
			}
		});
	};

	this.__init__();
}

VideoBackgrounds.prototype.getYTID = function (link) {
	if (link !== undefined && link !== null) {
		var pts = link.match(this.re.YOUTUBE);
		if (pts && pts.length) {
			this.re.YOUTUBE.lastIndex = 0; //regex needs a reset in for loops, I always forget this
			return pts[1];
		}
	}
	return null;
};

VideoBackgrounds.prototype.generateUID = function (pref) {
	//index the instance
	function getRandomIntInclusive(min, max) {
		min = Math.ceil(min);
		max = Math.floor(max);
		return Math.floor(Math.random() * (max - min + 1)) + min; //The maximum is inclusive and the minimum is inclusive
	}

	var uid = pref +'-'+ getRandomIntInclusive(0, 9999);
	while (this.index.hasOwnProperty(uid)) {
		uid = pref +'-'+ getRandomIntInclusive(0, 9999);
	}

	return uid;
};

VideoBackgrounds.prototype.pauseVideos = function () {
	for (var k in this.index) {
		this.index[k].pause();
	}
};

VideoBackgrounds.prototype.playVideos = function () {
	for (var k in this.index) {
		this.index[k].play();
	}
};

VideoBackgrounds.prototype.initYTPlayers = function (callback) {
	var self = this;

	window.onYouTubeIframeAPIReady = function () {
		for (var k in self.index) {
			self.index[k].initYTPlayer();
		}

		if (callback) {
			setTimeout(callback, 100);
		}
	};

	if (window.hasOwnProperty('YT') && window.YT.loaded) {
		window.onYouTubeIframeAPIReady();
	}
};

if (window.hasOwnProperty('jQuery')) {
	(function ($) {
	    $.fn.youtube_background = function(params) {
	        var $this = $(this);
			new VideoBackgrounds(this, params);
	 		return $this;
	 	};
	})(jQuery);
}