281 lines
9.2 KiB
TypeScript
281 lines
9.2 KiB
TypeScript
import React, {useState, useEffect, useRef, useCallback} from "react";
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import {animated} from "@react-spring/web";
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import {FaRegCirclePlay, FaRegCircleStop} from "react-icons/fa6";
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import HighlightContent from "../HighlightContent";
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import {ITrainingTip, SegmentRef, TimelineEvent} from "./TrainingInterfaces";
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const ExerciseWalkthrough: React.FC<ITrainingTip> = (tip: ITrainingTip) => {
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const [isAutoPlaying, setIsAutoPlaying] = useState<boolean>(false);
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const [currentTime, setCurrentTime] = useState<number>(0);
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const [walkthroughHtml, setWalkthroughHtml] = useState<string>("");
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const [highlightedPhrases, setHighlightedPhrases] = useState<string[]>([]);
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const [isPlaying, setIsPlaying] = useState<boolean>(false);
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const timelineRef = useRef<TimelineEvent[]>([]);
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const animationRef = useRef<number | null>(null);
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const segmentsRef = useRef<SegmentRef[]>([]);
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const toggleAutoPlay = useCallback(() => {
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setIsAutoPlaying((prev) => {
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if (!prev && currentTime === getMaxTime()) {
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setCurrentTime(0);
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}
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return !prev;
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});
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// eslint-disable-next-line react-hooks/exhaustive-deps
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}, [currentTime]);
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const handleAnimationComplete = useCallback(() => {
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setIsAutoPlaying(false);
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}, []);
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const handleResetAnimation = useCallback((newTime: number) => {
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setCurrentTime(newTime);
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}, []);
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const getMaxTime = (): number => {
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return (
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tip.exercise?.segments.reduce((sum, segment) => sum + segment.wordDelay * segment.html.split(/\s+/).length + segment.holdDelay, 0) ?? 0
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);
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};
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useEffect(() => {
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const timeline: TimelineEvent[] = [];
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let currentTimePosition = 0;
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segmentsRef.current = [];
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tip.exercise?.segments.forEach((segment, index) => {
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const parser = new DOMParser();
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const doc = parser.parseFromString(segment.html, "text/html");
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const words: string[] = [];
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const walkTree = (node: Node) => {
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if (node.nodeType === Node.TEXT_NODE) {
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words.push(...(node.textContent?.split(/\s+/).filter((word) => word.length > 0) || []));
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} else if (node.nodeType === Node.ELEMENT_NODE) {
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Array.from(node.childNodes).forEach(walkTree);
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}
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};
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walkTree(doc.body);
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const textDuration = words.length * segment.wordDelay;
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segmentsRef.current.push({
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...segment,
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words: words,
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startTime: currentTimePosition,
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endTime: currentTimePosition + textDuration,
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});
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timeline.push({
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type: "text",
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start: currentTimePosition,
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end: currentTimePosition + textDuration,
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segmentIndex: index,
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});
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currentTimePosition += textDuration;
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timeline.push({
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type: "highlight",
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start: currentTimePosition,
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end: currentTimePosition + segment.holdDelay,
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content: segment.highlight,
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segmentIndex: index,
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});
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currentTimePosition += segment.holdDelay;
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});
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timelineRef.current = timeline;
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}, [tip.exercise?.segments]);
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const updateText = useCallback(() => {
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const currentEvent = timelineRef.current.find((event) => currentTime >= event.start && currentTime < event.end);
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if (currentEvent) {
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if (currentEvent.type === "text") {
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const segment = segmentsRef.current[currentEvent.segmentIndex];
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const elapsedTime = currentTime - currentEvent.start;
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const wordsToShow = Math.min(Math.floor(elapsedTime / segment.wordDelay), segment.words.length);
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const previousSegmentsHtml = segmentsRef.current
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.slice(0, currentEvent.segmentIndex)
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.map((seg) => seg.html)
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.join("");
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const parser = new DOMParser();
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const doc = parser.parseFromString(segment.html, "text/html");
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let wordCount = 0;
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const walkTree = (node: Node, action: (node: Node) => void): boolean => {
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if (node.nodeType === Node.TEXT_NODE && node.textContent) {
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const words = node.textContent.split(/(\s+)/).filter((word) => word.length > 0);
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if (wordCount + words.filter((w) => !/\s+/.test(w)).length <= wordsToShow) {
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action(node.cloneNode(true));
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wordCount += words.filter((w) => !/\s+/.test(w)).length;
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} else {
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const remainingWords = wordsToShow - wordCount;
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const newTextContent = words.reduce(
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(acc, word) => {
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if (!/\s+/.test(word) && acc.nonSpaceWords < remainingWords) {
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acc.text += word;
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acc.nonSpaceWords++;
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} else if (/\s+/.test(word) || acc.nonSpaceWords < remainingWords) {
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acc.text += word;
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}
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return acc;
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},
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{text: "", nonSpaceWords: 0},
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).text;
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const newNode = node.cloneNode(false);
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newNode.textContent = newTextContent;
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action(newNode);
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wordCount = wordsToShow;
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}
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} else if (node.nodeType === Node.ELEMENT_NODE) {
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const clone = node.cloneNode(false);
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action(clone);
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Array.from(node.childNodes).some((child) => {
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return walkTree(child, (childNode) => (clone as Node).appendChild(childNode));
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});
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}
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return wordCount >= wordsToShow;
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};
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const fragment = document.createDocumentFragment();
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walkTree(doc.body, (node) => fragment.appendChild(node));
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const serializer = new XMLSerializer();
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const currentSegmentHtml = Array.from(fragment.childNodes)
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.map((node) => serializer.serializeToString(node))
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.join("");
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const newHtml = previousSegmentsHtml + currentSegmentHtml;
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setWalkthroughHtml(newHtml);
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setHighlightedPhrases([]);
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} else if (currentEvent.type === "highlight") {
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const newHtml = segmentsRef.current
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.slice(0, currentEvent.segmentIndex + 1)
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.map((seg) => seg.html)
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.join("");
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setWalkthroughHtml(newHtml);
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setHighlightedPhrases(currentEvent.content || []);
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}
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}
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}, [currentTime]);
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useEffect(() => {
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updateText();
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}, [currentTime, updateText]);
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useEffect(() => {
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if (isAutoPlaying) {
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const lastEvent = timelineRef.current[timelineRef.current.length - 1];
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if (lastEvent && currentTime >= lastEvent.end) {
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setCurrentTime(0);
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}
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setIsPlaying(true);
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} else {
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setIsPlaying(false);
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}
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}, [isAutoPlaying, currentTime]);
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useEffect(() => {
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const animate = () => {
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if (isPlaying) {
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setCurrentTime((prevTime) => {
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const newTime = prevTime + 50;
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const lastEvent = timelineRef.current[timelineRef.current.length - 1];
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if (lastEvent && newTime >= lastEvent.end) {
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setIsPlaying(false);
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handleAnimationComplete();
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return lastEvent.end;
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}
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return newTime;
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});
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}
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animationRef.current = requestAnimationFrame(animate);
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};
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animationRef.current = requestAnimationFrame(animate);
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return () => {
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if (animationRef.current) {
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cancelAnimationFrame(animationRef.current);
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}
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};
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}, [isPlaying, handleAnimationComplete]);
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const handleSliderChange = (e: React.ChangeEvent<HTMLInputElement>) => {
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const newTime = parseInt(e.target.value, 10);
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setCurrentTime(newTime);
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handleResetAnimation(newTime);
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};
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const handleSliderMouseDown = () => {
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setIsPlaying(false);
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};
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const handleSliderMouseUp = () => {
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if (isAutoPlaying) {
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setIsPlaying(true);
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}
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};
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if (tip.standalone || !tip.exercise) {
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return (
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<div className="container mx-auto">
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<h1 className="text-xl font-bold text-red-600">The exercise for this tip is not available yet!</h1>
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<div className="tip-container bg-blue-100 p-4 rounded-lg shadow-md mb-4 mt-10">
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<h3 className="text-xl font-semibold text-blue-800 mb-2">{tip.tipCategory}</h3>
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<div className="text-gray-700" dangerouslySetInnerHTML={{__html: tip.tipHtml}} />
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</div>
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</div>
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);
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}
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return (
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<div className="container mx-auto">
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<div className="tip-container bg-blue-100 p-4 rounded-lg shadow-md mb-4">
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<h3 className="text-xl font-semibold text-blue-800 mb-2">{tip.tipCategory}</h3>
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<div className="text-gray-700" dangerouslySetInnerHTML={{__html: tip.tipHtml}} />
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</div>
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<div className="flex flex-col space-y-4">
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<div className="flex flex-row items-center space-x-4 py-4">
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<button
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onClick={toggleAutoPlay}
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className="p-2 bg-blue-500 text-white rounded-full transition-colors duration-200 hover:bg-blue-600 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-opacity-50"
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aria-label={isAutoPlaying ? "Pause" : "Play"}>
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{isAutoPlaying ? <FaRegCircleStop className="w-6 h-6" /> : <FaRegCirclePlay className="w-6 h-6" />}
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</button>
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<input
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type="range"
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min="0"
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max={timelineRef.current.length > 0 ? timelineRef.current[timelineRef.current.length - 1].end : 0}
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value={currentTime}
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onChange={handleSliderChange}
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onMouseDown={handleSliderMouseDown}
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onMouseUp={handleSliderMouseUp}
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onTouchStart={handleSliderMouseDown}
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onTouchEnd={handleSliderMouseUp}
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className="flex-grow"
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/>
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</div>
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<div className="flex flex-col md:flex-row space-y-4 md:space-y-0 md:space-x-4">
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<div className="flex-1 bg-white p-6 rounded-lg shadow">
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{/*<h2 className="text-xl font-bold mb-4">Question</h2>*/}
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<div className="mb-4" dangerouslySetInnerHTML={{__html: tip.exercise.question}} />
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<HighlightContent html={tip.exercise.highlightable} highlightPhrases={highlightedPhrases} />
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</div>
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<div className="flex-1">
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<div className="bg-gray-50 rounded-lg shadow">
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<div className="p-6 space-y-4">
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<animated.div dangerouslySetInnerHTML={{__html: walkthroughHtml}} />
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</div>
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</div>
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</div>
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</div>
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</div>
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</div>
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);
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};
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export default ExerciseWalkthrough;
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