path: root/assets/js/videojs-youtube-annotations.js

class AnnotationParser {
	static get defaultAppearanceAttributes() {
		return {
			bgColor: 0xFFFFFF,
			bgOpacity: 0.80,
			fgColor: 0,
			textSize: 3.15
		};
	}

	static get attributeMap() {
		return {
			type: "tp",
			style: "s",
			x: "x",
			y: "y",
			width: "w",
			height: "h",

			sx: "sx",
			sy: "sy",

			timeStart: "ts",
			timeEnd: "te",
			text: "t",

			actionType: "at",
			actionUrl: "au",
			actionUrlTarget: "aut",
			actionSeconds: "as",

			bgOpacity: "bgo",
			bgColor: "bgc",
			fgColor: "fgc",
			textSize: "txsz"
		};
	}

	/* AR ANNOTATION FORMAT */
	deserializeAnnotation(serializedAnnotation) {
		const map = this.constructor.attributeMap;
		const attributes = serializedAnnotation.split(",");
		const annotation = {};
		for (const attribute of attributes) {
			const [ key, value ] = attribute.split("=");
			const mappedKey = this.getKeyByValue(map, key);

			let finalValue = "";

			if (["text", "actionType", "actionUrl", "actionUrlTarget", "type", "style"].indexOf(mappedKey) > -1) {
				finalValue = decodeURIComponent(value);
			}
			else {
				finalValue = parseFloat(value, 10);
			}
			annotation[mappedKey] = finalValue;
		}
		return annotation;
	}
	serializeAnnotation(annotation) {
		const map = this.constructor.attributeMap;
		let serialized = "";
		for (const key in annotation) {
			const mappedKey = map[key];
			if ((["text", "actionType", "actionUrl", "actionUrlTarget"].indexOf(key) > -1) && mappedKey && annotation.hasOwnProperty(key)) {
				let text = encodeURIComponent(annotation[key]);
				serialized += `${mappedKey}=${text},`;
			}
			else if ((["text", "actionType", "actionUrl", "actionUrlTarget"].indexOf("key") === -1) && mappedKey && annotation.hasOwnProperty(key)) {
				serialized += `${mappedKey}=${annotation[key]},`;
			}
		}
		// remove trailing comma
		return serialized.substring(0, serialized.length - 1);
	}

	deserializeAnnotationList(serializedAnnotationString) {
		const serializedAnnotations = serializedAnnotationString.split(";");
		serializedAnnotations.length = serializedAnnotations.length - 1;
		const annotations = [];
		for (const annotation of serializedAnnotations) {
			annotations.push(this.deserializeAnnotation(annotation));
		}
		return annotations;
	}
	serializeAnnotationList(annotations) {
		let serialized = "";
		for (const annotation of annotations) {
			serialized += this.serializeAnnotation(annotation) + ";";
		}
		return serialized;
	}

	/* PARSING YOUTUBE'S ANNOTATION FORMAT */
	xmlToDom(xml) {
		const parser = new DOMParser();
		const dom = parser.parseFromString(xml, "application/xml");
		return dom;
	}
	getAnnotationsFromXml(xml) {
		const dom = this.xmlToDom(xml);
		return dom.getElementsByTagName("annotation");
	}
	parseYoutubeAnnotationList(annotationElements) {
		const annotations = [];
		for (const el of annotationElements) {
			const parsedAnnotation = this.parseYoutubeAnnotation(el);
			if (parsedAnnotation) annotations.push(parsedAnnotation);
		}
		return annotations;
	}
	parseYoutubeAnnotation(annotationElement) {
		const base = annotationElement;
		const attributes = this.getAttributesFromBase(base);
		if (!attributes.type || attributes.type === "pause") return null;

		const text = this.getTextFromBase(base);
		const action = this.getActionFromBase(base);

		const backgroundShape = this.getBackgroundShapeFromBase(base);
		if (!backgroundShape) return null;
		const timeStart = backgroundShape.timeRange.start;
		const timeEnd = backgroundShape.timeRange.end;

		if (isNaN(timeStart) || isNaN(timeEnd) || timeStart === null || timeEnd === null) {
			return null;
		}

		const appearance = this.getAppearanceFromBase(base);

		// properties the renderer needs
		let annotation = {
			// possible values: text, highlight, pause, branding
			type: attributes.type,
			// x, y, width, and height as percent of video size
			x: backgroundShape.x, 
			y: backgroundShape.y, 
			width: backgroundShape.width, 
			height: backgroundShape.height,
			// what time the annotation is shown in seconds
			timeStart,
			timeEnd
		};
		// properties the renderer can work without
		if (attributes.style) annotation.style = attributes.style;
		if (text) annotation.text = text;
		if (action) annotation = Object.assign(action, annotation);
		if (appearance) annotation = Object.assign(appearance, annotation);

		if (backgroundShape.hasOwnProperty("sx")) annotation.sx = backgroundShape.sx;
		if (backgroundShape.hasOwnProperty("sy")) annotation.sy = backgroundShape.sy;

		return annotation;
	}
	getBackgroundShapeFromBase(base) {
		const movingRegion = base.getElementsByTagName("movingRegion")[0];
		if (!movingRegion) return null;
		const regionType = movingRegion.getAttribute("type");

		const regions = movingRegion.getElementsByTagName(`${regionType}Region`);
		const timeRange = this.extractRegionTime(regions);

		const shape = {
			type: regionType,
			x: parseFloat(regions[0].getAttribute("x"), 10),
			y: parseFloat(regions[0].getAttribute("y"), 10),
			width: parseFloat(regions[0].getAttribute("w"), 10),
			height: parseFloat(regions[0].getAttribute("h"), 10),
			timeRange
		}

		const sx = regions[0].getAttribute("sx");
		const sy = regions[0].getAttribute("sy");

		if (sx) shape.sx = parseFloat(sx, 10);
		if (sy) shape.sy = parseFloat(sy, 10);
		
		return shape;
	}
	getAttributesFromBase(base) {
		const attributes = {};
		attributes.type = base.getAttribute("type");
		attributes.style = base.getAttribute("style");
		return attributes;
	}
	getTextFromBase(base) {
		const textElement = base.getElementsByTagName("TEXT")[0];
		if (textElement) return textElement.textContent;
	}
	getActionFromBase(base) {
		const actionElement = base.getElementsByTagName("action")[0];
		if (!actionElement) return null;
		const typeAttr = actionElement.getAttribute("type");

		const urlElement = actionElement.getElementsByTagName("url")[0];
		if (!urlElement) return null;
		const actionUrlTarget = urlElement.getAttribute("target");
		const href = urlElement.getAttribute("value");
		// only allow links to youtube
		// can be changed in the future
		if (href.startsWith("https://www.youtube.com/")) {
			const url = new URL(href);
			const srcVid = url.searchParams.get("src_vid");
			const toVid = url.searchParams.get("v");

			return this.linkOrTimestamp(url, srcVid, toVid, actionUrlTarget);
		}
	}
	linkOrTimestamp(url, srcVid, toVid, actionUrlTarget) {
		// check if it's a link to a new video
		// or just a timestamp
		if (srcVid && toVid && srcVid === toVid) {
			let seconds = 0;
			const hash = url.hash;
			if (hash && hash.startsWith("#t=")) {
				const timeString = url.hash.split("#t=")[1];
				seconds = this.timeStringToSeconds(timeString);
			}
			return {actionType: "time", actionSeconds: seconds}
		}
		else {
			return {actionType: "url", actionUrl: url.href, actionUrlTarget};
		}
	}
	getAppearanceFromBase(base) {
		const appearanceElement = base.getElementsByTagName("appearance")[0];
		const styles = this.constructor.defaultAppearanceAttributes;

		if (appearanceElement) {
			const bgOpacity = appearanceElement.getAttribute("bgAlpha");
			const bgColor = appearanceElement.getAttribute("bgColor");
			const fgColor = appearanceElement.getAttribute("fgColor");
			const textSize = appearanceElement.getAttribute("textSize");
			// not yet sure what to do with effects 
			// const effects = appearanceElement.getAttribute("effects");

			// 0.00 to 1.00
			if (bgOpacity) styles.bgOpacity = parseFloat(bgOpacity, 10);
			// 0 to 256 ** 3
			if (bgColor) styles.bgColor = parseInt(bgColor, 10);
			if (fgColor) styles.fgColor = parseInt(fgColor, 10);
			// 0.00 to 100.00?
			if (textSize) styles.textSize = parseFloat(textSize, 10);
		}

		return styles;
	}

	/* helper functions */
	extractRegionTime(regions) {
		let timeStart = regions[0].getAttribute("t");
		timeStart = this.hmsToSeconds(timeStart);

		let timeEnd = regions[regions.length - 1].getAttribute("t");
		timeEnd = this.hmsToSeconds(timeEnd);

		return {start: timeStart, end: timeEnd}
	}
	// https://stackoverflow.com/a/9640417/10817894
	hmsToSeconds(hms) {
	    let p = hms.split(":");
	    let s = 0;
	    let m = 1;

	    while (p.length > 0) {
	        s += m * parseFloat(p.pop(), 10);
	        m *= 60;
	    }
	    return s;
	}
	timeStringToSeconds(time) {
		let seconds = 0;

		const h = time.split("h");
	  	const m = (h[1] || time).split("m");
	  	const s = (m[1] || time).split("s");
		  
	  	if (h[0] && h.length === 2) seconds += parseInt(h[0], 10) * 60 * 60;
	  	if (m[0] && m.length === 2) seconds += parseInt(m[0], 10) * 60;
	  	if (s[0] && s.length === 2) seconds += parseInt(s[0], 10);

		return seconds;
	}
	getKeyByValue(obj, value) {
		for (const key in obj) {
			if (obj.hasOwnProperty(key)) {
				if (obj[key] === value) {
					return key;
				}
			}
		}
	}
}
class AnnotationRenderer {
	constructor(annotations, container, playerOptions, updateInterval = 1000) {
		if (!annotations) throw new Error("Annotation objects must be provided");
		if (!container) throw new Error("An element to contain the annotations must be provided");

		if (playerOptions && playerOptions.getVideoTime && playerOptions.seekTo) {
			this.playerOptions = playerOptions;
		}
		else {
			console.info("AnnotationRenderer is running without a player. The update method will need to be called manually.");
		}

		this.annotations = annotations;
		this.container = container;

		this.annotationsContainer = document.createElement("div");
		this.annotationsContainer.classList.add("__cxt-ar-annotations-container__");
		this.annotationsContainer.setAttribute("data-layer", "4");
		this.annotationsContainer.addEventListener("click", e => {
			this.annotationClickHandler(e);
		});
		this.container.prepend(this.annotationsContainer);

		this.createAnnotationElements();

		// in case the dom already loaded
		this.updateAllAnnotationSizes();
		window.addEventListener("DOMContentLoaded", e => {
			this.updateAllAnnotationSizes();
		});

		this.updateInterval = updateInterval;
		this.updateIntervalId = null;
	}
	changeAnnotationData(annotations) {
		this.stop();
		this.removeAnnotationElements();
		this.annotations = annotations;
		this.createAnnotationElements();
		this.start();
	}
	createAnnotationElements() {
		for (const annotation of this.annotations) {
			const el = document.createElement("div");
			el.classList.add("__cxt-ar-annotation__");

			annotation.__element = el;
			el.__annotation = annotation;

			// close button
			const closeButton = this.createCloseElement();
			closeButton.addEventListener("click", e => {
				el.setAttribute("hidden", "");
				el.setAttribute("data-ar-closed", "");
				if (el.__annotation.__speechBubble) {
					const speechBubble = el.__annotation.__speechBubble;
					speechBubble.style.display = "none";
				}
			});
			el.append(closeButton);

			if (annotation.text) {
				const textNode = document.createElement("span");
				textNode.textContent = annotation.text;
				el.append(textNode);
				el.setAttribute("data-ar-has-text", "");
			}

			if (annotation.style === "speech") {
				const containerDimensions = this.container.getBoundingClientRect();
				const speechX = this.percentToPixels(containerDimensions.width, annotation.x);
				const speechY = this.percentToPixels(containerDimensions.height, annotation.y);

				const speechWidth = this.percentToPixels(containerDimensions.width, annotation.width);
				const speechHeight = this.percentToPixels(containerDimensions.height, annotation.height);

				const speechPointX = this.percentToPixels(containerDimensions.width, annotation.sx);
				const speechPointY = this.percentToPixels(containerDimensions.height, annotation.sy);

				const bubbleColor = this.getFinalAnnotationColor(annotation, false);
				const bubble = this.createSvgSpeechBubble(speechX, speechY, speechWidth, speechHeight, speechPointX, speechPointY, bubbleColor, annotation.__element);
				bubble.style.display = "none";
				bubble.style.overflow = "visible";
				el.style.pointerEvents = "none";
				bubble.__annotationEl = el;
				annotation.__speechBubble = bubble;

				const path = bubble.getElementsByTagName("path")[0];
				path.addEventListener("mouseover", () => {
					closeButton.style.display = "block";
					// path.style.cursor = "pointer";
					closeButton.style.cursor = "pointer";
					path.setAttribute("fill", this.getFinalAnnotationColor(annotation, true));
				});
				path.addEventListener("mouseout", e => {
					if (!e.relatedTarget.classList.contains("__cxt-ar-annotation-close__")) {
						closeButton.style.display ="none";
						// path.style.cursor = "default";
						closeButton.style.cursor = "default";
						path.setAttribute("fill", this.getFinalAnnotationColor(annotation, false));
					}
				});

				closeButton.addEventListener("mouseleave", () => {
					closeButton.style.display = "none";
					path.style.cursor = "default";
					closeButton.style.cursor = "default";
					path.setAttribute("fill", this.getFinalAnnotationColor(annotation, false));
				});

				el.prepend(bubble);
			}
			else if (annotation.type === "highlight") {
				el.style.backgroundColor = "";
				el.style.border = `2.5px solid ${this.getFinalAnnotationColor(annotation, false)}`;
				if (annotation.actionType === "url")
					el.style.cursor = "pointer";
			}
			else if (annotation.style !== "title") {
				el.style.backgroundColor = this.getFinalAnnotationColor(annotation);
				el.addEventListener("mouseenter", () => {
					el.style.backgroundColor = this.getFinalAnnotationColor(annotation, true);
				});
				el.addEventListener("mouseleave", () => {
					el.style.backgroundColor = this.getFinalAnnotationColor(annotation, false);
				});
				if (annotation.actionType === "url")
					el.style.cursor = "pointer";
			}

			el.style.color = `#${this.decimalToHex(annotation.fgColor)}`;

			el.setAttribute("data-ar-type", annotation.type);
			el.setAttribute("hidden", "");
			this.annotationsContainer.append(el);
		}
	}
	createCloseElement() {
		const svg = document.createElementNS("http://www.w3.org/2000/svg", "svg");
		svg.setAttribute("viewBox", "0 0 100 100")
		svg.classList.add("__cxt-ar-annotation-close__");

		const path = document.createElementNS(svg.namespaceURI, "path");
		path.setAttribute("d", "M25 25 L 75 75 M 75 25 L 25 75");
		path.setAttribute("stroke", "#bbb");
		path.setAttribute("stroke-width", 10)
		path.setAttribute("x", 5);
		path.setAttribute("y", 5);

		const circle = document.createElementNS(svg.namespaceURI, "circle");
		circle.setAttribute("cx", 50);
		circle.setAttribute("cy", 50);
		circle.setAttribute("r", 50);

		svg.append(circle, path);
		return svg;
	}
	createSvgSpeechBubble(x, y, width, height, pointX, pointY, color = "white", element, svg) {

		const horizontalBaseStartMultiplier = 0.17379070765180116;
		const horizontalBaseEndMultiplier = 0.14896346370154384;

		const verticalBaseStartMultiplier = 0.12;
		const verticalBaseEndMultiplier = 0.3;

		let path;

		if (!svg) {
			svg = document.createElementNS("http://www.w3.org/2000/svg", "svg");
			svg.classList.add("__cxt-ar-annotation-speech-bubble__");

			path = document.createElementNS("http://www.w3.org/2000/svg", "path");
			path.setAttribute("fill", color);
			svg.append(path);
		}
		else {
			path = svg.children[0];
		}

		svg.style.position = "absolute";
		svg.setAttribute("width", "100%");
		svg.setAttribute("height", "100%");
		svg.style.left = "0";
		svg.style.top = "0";

		let positionStart;

		let baseStartX = 0;
		let baseStartY = 0;

		let baseEndX = 0;
		let baseEndY = 0;

		let pointFinalX = pointX;
		let pointFinalY = pointY;

		let commentRectPath;
		const pospad = 20;

		let textWidth = 0;
		let textHeight = 0;
		let textX = 0;
		let textY = 0;

		let textElement;
		let closeElement;

		if (element) {
			textElement = element.getElementsByTagName("span")[0];
			closeElement = element.getElementsByClassName("__cxt-ar-annotation-close__")[0];
		}

		if (pointX > ((x + width) - (width / 2)) && pointY > y + height) {
			positionStart = "br";
			baseStartX = width - ((width * horizontalBaseStartMultiplier) * 2);
			baseEndX = baseStartX + (width * horizontalBaseEndMultiplier);
			baseStartY = height;
			baseEndY = height;

			pointFinalX = pointX - x;
			pointFinalY = pointY - y;
			element.style.height = pointY - y;
			commentRectPath = `L${width} ${height} L${width} 0 L0 0 L0 ${baseStartY} L${baseStartX} ${baseStartY}`;
			if (textElement) {
				textWidth = width;
				textHeight = height;
				textX = 0;
				textY = 0;
			}
		}
		else if (pointX < ((x + width) - (width / 2)) && pointY > y + height) {
			positionStart = "bl";
			baseStartX = width * horizontalBaseStartMultiplier;
			baseEndX = baseStartX + (width * horizontalBaseEndMultiplier);
			baseStartY = height;
			baseEndY = height;

			pointFinalX = pointX - x;
			pointFinalY = pointY - y;
			element.style.height = `${pointY - y}px`;
			commentRectPath = `L${width} ${height} L${width} 0 L0 0 L0 ${baseStartY} L${baseStartX} ${baseStartY}`;
			if (textElement) {
				textWidth = width;
				textHeight = height;
				textX = 0;
				textY = 0;
			}
		}
		else if (pointX > ((x + width) - (width / 2)) && pointY < (y - pospad)) {
			positionStart = "tr";
			baseStartX = width - ((width * horizontalBaseStartMultiplier) * 2);
			baseEndX = baseStartX + (width * horizontalBaseEndMultiplier);

			const yOffset = y - pointY;
			baseStartY = yOffset;
			baseEndY = yOffset;
			element.style.top = y - yOffset + "px";
			element.style.height = height + yOffset + "px";

			pointFinalX = pointX - x;
			pointFinalY = 0;
			commentRectPath = `L${width} ${yOffset} L${width} ${height + yOffset} L0 ${height + yOffset} L0 ${yOffset} L${baseStartX} ${baseStartY}`;
			if (textElement) {
				textWidth = width;
				textHeight = height;
				textX = 0;
				textY = yOffset;
			}
		}
		else if (pointX < ((x + width) - (width / 2)) && pointY < y) {
			positionStart = "tl";
			baseStartX = width * horizontalBaseStartMultiplier;
			baseEndX = baseStartX + (width * horizontalBaseEndMultiplier);

			const yOffset = y - pointY;
			baseStartY = yOffset;
			baseEndY = yOffset;
			element.style.top = y - yOffset + "px";
			element.style.height = height + yOffset + "px";

			pointFinalX = pointX - x;
			pointFinalY = 0;
			commentRectPath = `L${width} ${yOffset} L${width} ${height + yOffset} L0 ${height + yOffset} L0 ${yOffset} L${baseStartX} ${baseStartY}`;

			if (textElement) {
				textWidth = width;
				textHeight = height;
				textX = 0;
				textY = yOffset;
			}
		}
		else if (pointX > (x + width) && pointY > (y - pospad) && pointY < ((y + height) - pospad)) {
			positionStart = "r";

			const xOffset = pointX - (x + width);

			baseStartX = width;
			baseEndX = width;

			element.style.width = width + xOffset + "px";

			baseStartY = height * verticalBaseStartMultiplier;
			baseEndY = baseStartY + (height * verticalBaseEndMultiplier);

			pointFinalX = width + xOffset;
			pointFinalY = pointY - y;
			commentRectPath = `L${baseStartX} ${height} L0 ${height} L0 0 L${baseStartX} 0 L${baseStartX} ${baseStartY}`;
			if (textElement) {
				textWidth = width;
				textHeight = height;
				textX = 0;
				textY = 0;
			}
		}
		else if (pointX < x && pointY > y && pointY < (y + height)) {
			positionStart = "l";

			const xOffset = x - pointX;

			baseStartX = xOffset;
			baseEndX = xOffset;

			element.style.left = x - xOffset + "px";
			element.style.width = width + xOffset + "px";

			baseStartY = height * verticalBaseStartMultiplier;
			baseEndY = baseStartY + (height * verticalBaseEndMultiplier);

			pointFinalX = 0;
			pointFinalY = pointY - y;
			commentRectPath = `L${baseStartX} ${height} L${width + baseStartX} ${height} L${width + baseStartX} 0 L${baseStartX} 0 L${baseStartX} ${baseStartY}`;
			if (textElement) {
				textWidth = width;
				textHeight = height;
				textX = xOffset;
				textY = 0;
			}
		}
		else {
			return svg;
		}

		if (textElement) {
			textElement.style.left = textX + "px";
			textElement.style.top = textY + "px";
			textElement.style.width = textWidth + "px";
			textElement.style.height = textHeight + "px";
		}
		if (closeElement) {
			const closeSize = parseFloat(this.annotationsContainer.style.getPropertyValue("--annotation-close-size"), 10);
			if (closeSize) {
				closeElement.style.left = ((textX + textWidth) + (closeSize / -1.8)) + "px";
				closeElement.style.top = (textY + (closeSize / -1.8)) + "px";
			}
		}

		const pathData = `M${baseStartX} ${baseStartY} L${pointFinalX} ${pointFinalY} L${baseEndX} ${baseEndY} ${commentRectPath}`;
		path.setAttribute("d", pathData);

		return svg;
	}
	getFinalAnnotationColor(annotation, hover = false) {
		const alphaHex = hover ? (0xE6).toString(16) : Math.floor((annotation.bgOpacity * 255)).toString(16);
		if (!isNaN(annotation.bgColor)) {
			const bgColorHex = this.decimalToHex(annotation.bgColor);

			const backgroundColor = `#${bgColorHex}${alphaHex}`;
			return backgroundColor;
		}
	}
	removeAnnotationElements() {
		for (const annotation of this.annotations) {
			annotation.__element.remove();
		}
	}
	update(videoTime) {
		for (const annotation of this.annotations) {
			const el = annotation.__element;
			if (el.hasAttribute("data-ar-closed")) continue;
			const start = annotation.timeStart;
			const end = annotation.timeEnd;

			if (el.hasAttribute("hidden") && (videoTime >= start && videoTime < end)) {
				el.removeAttribute("hidden");
				if (annotation.style === "speech" && annotation.__speechBubble) {
					annotation.__speechBubble.style.display = "block";
				}
			}
			else if (!el.hasAttribute("hidden") && (videoTime < start || videoTime > end)) {
				el.setAttribute("hidden", "");
				if (annotation.style === "speech" && annotation.__speechBubble) {
					annotation.__speechBubble.style.display = "none";
				}
			}
		}
	}
	start() {
		if (!this.playerOptions) throw new Error("playerOptions must be provided to use the start method");

		const videoTime = this.playerOptions.getVideoTime();
		if (!this.updateIntervalId) {
			this.update(videoTime);
			this.updateIntervalId = setInterval(() => {
				const videoTime = this.playerOptions.getVideoTime();
				this.update(videoTime);
				window.dispatchEvent(new CustomEvent("__ar_renderer_start"));
			}, this.updateInterval);
		}
	}
	stop() {
		if (!this.playerOptions) throw new Error("playerOptions must be provided to use the stop method");

		const videoTime = this.playerOptions.getVideoTime();
		if (this.updateIntervalId) {
			this.update(videoTime);
			clearInterval(this.updateIntervalId);
			this.updateIntervalId = null;
			window.dispatchEvent(new CustomEvent("__ar_renderer_stop"));
		}
	}

	updateAnnotationTextSize(annotation, containerHeight) {
		if (annotation.textSize) {
			const textSize = (annotation.textSize / 100) * containerHeight;
			annotation.__element.style.fontSize = `${textSize}px`;
		}
	}
	updateTextSize() {
		const containerHeight = this.container.getBoundingClientRect().height;
		// should be run when the video resizes
		for (const annotation of this.annotations) {
			this.updateAnnotationTextSize(annotation, containerHeight);
		}
	}
	updateCloseSize(containerHeight) {
		if (!containerHeight) containerHeight = this.container.getBoundingClientRect().height;
		const multiplier = 0.0423;
		this.annotationsContainer.style.setProperty("--annotation-close-size", `${containerHeight * multiplier}px`);
	}
	updateAnnotationDimensions(annotations, videoWidth, videoHeight) {
		const playerWidth = this.container.getBoundingClientRect().width;
		const playerHeight = this.container.getBoundingClientRect().height;

		const widthDivider = playerWidth / videoWidth;
		const heightDivider = playerHeight / videoHeight;

		let scaledVideoWidth = playerWidth;
		let scaledVideoHeight = playerHeight;

		if (widthDivider % 1 !== 0 || heightDivider % 1 !== 0) {
			// vertical bars
			if (widthDivider > heightDivider) {
				scaledVideoWidth = (playerHeight / videoHeight) * videoWidth;
				scaledVideoHeight = playerHeight;
			}
			// horizontal bars
			else if (heightDivider > widthDivider) {
				scaledVideoWidth = playerWidth;
				scaledVideoHeight = (playerWidth / videoWidth) * videoHeight;
			}
		}

		const verticalBlackBarWidth = (playerWidth - scaledVideoWidth) / 2;
		const horizontalBlackBarHeight = (playerHeight - scaledVideoHeight) / 2;

		const widthOffsetPercent = (verticalBlackBarWidth / playerWidth * 100);
		const heightOffsetPercent = (horizontalBlackBarHeight / playerHeight * 100);

		const widthMultiplier = (scaledVideoWidth / playerWidth);
		const heightMultiplier = (scaledVideoHeight / playerHeight);

		for (const annotation of annotations) {
			const el = annotation.__element;

			let ax = widthOffsetPercent + (annotation.x * widthMultiplier);
			let ay = heightOffsetPercent + (annotation.y * heightMultiplier);
			let aw = annotation.width * widthMultiplier;
			let ah = annotation.height * heightMultiplier;

			el.style.left = `${ax}%`;
			el.style.top = `${ay}%`;

			el.style.width = `${aw}%`;
			el.style.height = `${ah}%`;

			let horizontalPadding = scaledVideoWidth * 0.008;
			let verticalPadding = scaledVideoHeight * 0.008;

			if (annotation.style === "speech" && annotation.text) {
				const pel = annotation.__element.getElementsByTagName("span")[0];
				horizontalPadding *= 2;
				verticalPadding *= 2;

				pel.style.paddingLeft = horizontalPadding + "px";
				pel.style.paddingRight = horizontalPadding + "px";
				pel.style.paddingBottom = verticalPadding + "px";
				pel.style.paddingTop = verticalPadding + "px";
			}
			else if (annotation.style !== "speech") {
				el.style.paddingLeft = horizontalPadding + "px";
				el.style.paddingRight = horizontalPadding + "px";
				el.style.paddingBottom = verticalPadding + "px";
				el.style.paddingTop = verticalPadding + "px";
			}

			if (annotation.__speechBubble) {
				const asx = this.percentToPixels(playerWidth, ax);
				const asy = this.percentToPixels(playerHeight, ay);
				const asw = this.percentToPixels(playerWidth, aw);
				const ash = this.percentToPixels(playerHeight, ah);

				let sx = widthOffsetPercent + (annotation.sx * widthMultiplier);
				let sy = heightOffsetPercent + (annotation.sy * heightMultiplier);
				sx = this.percentToPixels(playerWidth, sx);
				sy = this.percentToPixels(playerHeight, sy);

				this.createSvgSpeechBubble(asx, asy, asw, ash, sx, sy, null, annotation.__element, annotation.__speechBubble);
			}

			this.updateAnnotationTextSize(annotation, scaledVideoHeight);
			this.updateCloseSize(scaledVideoHeight);
		}
	}

	updateAllAnnotationSizes() {
		if (this.playerOptions && this.playerOptions.getOriginalVideoWidth && this.playerOptions.getOriginalVideoHeight) {
			const videoWidth = this.playerOptions.getOriginalVideoWidth();
			const videoHeight = this.playerOptions.getOriginalVideoHeight();
			this.updateAnnotationDimensions(this.annotations, videoWidth, videoHeight);
		}
		else {
			const playerWidth = this.container.getBoundingClientRect().width;
			const playerHeight = this.container.getBoundingClientRect().height;
			this.updateAnnotationDimensions(this.annotations, playerWidth, playerHeight);
		}
	}

	hideAll() {
		for (const annotation of this.annotations) {
			annotation.__element.setAttribute("hidden", "");
		}
	}
	annotationClickHandler(e) {
		let annotationElement = e.target;
		// if we click on annotation text instead of the actual annotation element
		if (!annotationElement.matches(".__cxt-ar-annotation__") && !annotationElement.closest(".__cxt-ar-annotation-close__")) {
			annotationElement = annotationElement.closest(".__cxt-ar-annotation__");
			if (!annotationElement) return null;
		} 
		let annotationData = annotationElement.__annotation;

		if (!annotationElement || !annotationData) return;

		if (annotationData.actionType === "time") {
			const seconds = annotationData.actionSeconds;
			if (this.playerOptions) {
				this.playerOptions.seekTo(seconds);
				const videoTime = this.playerOptions.getVideoTime();
				this.update(videoTime);
			}
			window.dispatchEvent(new CustomEvent("__ar_seek_to", {detail: {seconds}}));
		}
		else if (annotationData.actionType === "url") {
			const data = {url: annotationData.actionUrl, target: annotationData.actionUrlTarget || "current"};

			const timeHash = this.extractTimeHash(new URL(data.url));
			if (timeHash && timeHash.hasOwnProperty("seconds")) {
				data.seconds = timeHash.seconds;
			}
			window.dispatchEvent(new CustomEvent("__ar_annotation_click", {detail: data}));
		}
	}

	setUpdateInterval(ms) {
		this.updateInterval = ms;
		this.stop();
		this.start();
	}
	// https://stackoverflow.com/a/3689638/10817894
	decimalToHex(dec) {
		let hex = dec.toString(16);
		hex = "000000".substr(0, 6 - hex.length) + hex; 
		return hex;
	}
	extractTimeHash(url) {
		if (!url) throw new Error("A URL must be provided");
		const hash = url.hash;

		if (hash && hash.startsWith("#t=")) {
			const timeString = url.hash.split("#t=")[1];
			const seconds = this.timeStringToSeconds(timeString);
			return {seconds};
		}
		else {
			return false;
		}
	}
	timeStringToSeconds(time) {
		let seconds = 0;

		const h = time.split("h");
	  	const m = (h[1] || time).split("m");
	  	const s = (m[1] || time).split("s");
		  
	  	if (h[0] && h.length === 2) seconds += parseInt(h[0], 10) * 60 * 60;
	  	if (m[0] && m.length === 2) seconds += parseInt(m[0], 10) * 60;
	  	if (s[0] && s.length === 2) seconds += parseInt(s[0], 10);

		return seconds;
	}
	percentToPixels(a, b) {
		return a * b / 100;
	}
}
function youtubeAnnotationsPlugin(options) {
	if (!options.annotationXml) throw new Error("Annotation data must be provided");
	if (!options.videoContainer) throw new Error("A video container to overlay the data on must be provided");

	const player = this;

	const xml = options.annotationXml;
	const parser = new AnnotationParser();
	const annotationElements = parser.getAnnotationsFromXml(xml);
	const annotations = parser.parseYoutubeAnnotationList(annotationElements);

	const videoContainer = options.videoContainer;

	const playerOptions = {
		getVideoTime() {
			return player.currentTime();
		},
		seekTo(seconds) {
			player.currentTime(seconds);
		},
		getOriginalVideoWidth() {
			return player.videoWidth();
		},
		getOriginalVideoHeight() {
			return player.videoHeight();
		}
	};

	raiseControls();
	const renderer = new AnnotationRenderer(annotations, videoContainer, playerOptions, options.updateInterval);
	setupEventListeners(player, renderer);
	renderer.start();
}

function setupEventListeners(player, renderer) {
	if (!player) throw new Error("A video player must be provided");
	// should be throttled for performance
	player.on("playerresize", e => {
		renderer.updateAllAnnotationSizes(renderer.annotations);
	});
	// Trigger resize since the video can have different dimensions than player
	player.one("loadedmetadata", e => {
		renderer.updateAllAnnotationSizes(renderer.annotations);
	});

	player.on("pause", e => {
		renderer.stop();
	});
	player.on("play", e => {
		renderer.start();
	});
	player.on("seeking", e => {
		renderer.update();
	});
	player.on("seeked", e => {
		renderer.update();
	});
}

function raiseControls() {
	const styles = document.createElement("style");
	styles.textContent = `
	.vjs-control-bar {
		z-index: 21;
	}
	`;
	document.body.append(styles);
}