[Joint test] Implementing frontend features

.eslintignore

@@ -0,0 +1 @@
+dist/

.eslintrc.json

@@ -0,0 +1,15 @@
+{
+	"env": {
+		"es6": true,
+		"node": true,
+		"jest/globals": true
+	},
+	"extends": ["@codeyourfuture/standard"],
+	"parser": "@babel/eslint-parser",
+	"root": true,
+	"rules": {
+		"indent": "off",
+		"operator-linebreak": "off"
+	},
+	"plugins": ["jest"]
+}

.github/workflows/enforce-linting.yml

@@ -4,7 +4,7 @@ run-name: Enforce lint passes on committed files
 
 on:
   workflow_dispatch:
-  # pull_request:
+  pull_request:
 
 jobs:
   run-linter:

.github/workflows/run-client-tests.yml

@@ -4,7 +4,7 @@ run-name: Enforce tests pass on committed files
 
 on:
   workflow_dispatch:
-  # pull_request:
+  pull_request:
 
 jobs:
   run-client-tests:

.prettierrc

@@ -0,0 +1,9 @@
+{
+	"arrowParens": "always",
+	"bracketSpacing": true,
+	"endOfLine": "lf",
+	"semi": true,
+	"singleQuote": false,
+	"trailingComma": "es5",
+	"useTabs": true
+}

client/src/App.js

@@ -1,7 +1,141 @@
+import { useState, useEffect } from "react";
+
+import VideoList from "./components/VideoList";
+import VideoSubmission from "./components/VideoSubmission";
+import OrderingSelector from "./components/OrderingSelector";
+
+const VIDEO_LIST = [
+	{
+		id: 523523,
+		title: "Never Gonna Give You Up",
+		url: "https://www.youtube.com/watch?v=dQw4w9WgXcQ",
+		rating: 23,
+	},
+	{
+		id: 523427,
+		title: "The Coding Train",
+		url: "https://www.youtube.com/watch?v=HerCR8bw_GE",
+		rating: 230,
+	},
+	{
+		id: 82653,
+		title: "Mac & Cheese | Basics with Babish",
+		url: "https://www.youtube.com/watch?v=FUeyrEN14Rk",
+		rating: 2111,
+	},
+	{
+		id: 858566,
+		title: "Videos for Cats to Watch - 8 Hour Bird Bonanza",
+		url: "https://www.youtube.com/watch?v=xbs7FT7dXYc",
+		rating: 11,
+	},
+	{
+		id: 453538,
+		title:
+			"The Complete London 2012 Opening Ceremony | London 2012 Olympic Games",
+		url: "https://www.youtube.com/watch?v=4As0e4de-rI",
+		rating: 3211,
+	},
+	{
+		id: 283634,
+		title: "Learn Unity - Beginner's Game Development Course",
+		url: "https://www.youtube.com/watch?v=gB1F9G0JXOo",
+		rating: 211,
+	},
+	{
+		id: 562824,
+		title: "Cracking Enigma in 2021 - Computerphile",
+		url: "https://www.youtube.com/watch?v=RzWB5jL5RX0",
+		rating: 111,
+	},
+	{
+		id: 442452,
+		title: "Coding Adventure: Chess AI",
+		url: "https://www.youtube.com/watch?v=U4ogK0MIzqk",
+		rating: 671,
+	},
+	{
+		id: 536363,
+		title: "Coding Adventure: Ant and Slime Simulations",
+		url: "https://www.youtube.com/watch?v=X-iSQQgOd1A",
+		rating: 76,
+	},
+	{
+		id: 323445,
+		title: "Why the Tour de France is so brutal",
+		url: "https://www.youtube.com/watch?v=ZacOS8NBK6U",
+		rating: 73,
+	},
+];
+
 const App = () => {
+	let [videos, setVideos] = useState([]);
+	let [order, setOrder] = useState("id");
+
+	function orderVideos(videos, order, initial) {
+		switch (order) {
+			case "rating_asc":
+				return videos.sort((a, b) => a.rating - b.rating);
+			case "rating_desc":
+				return videos.sort((a, b) => b.rating - a.rating);
+			case "random":
+				if (initial) {
+					return videos.sort(() => 0.5 - Math.random());
+				} else {
+					return videos; // this should only sort once when getting from backend, then keep it as-is
+				}
+			case "id":
+				return videos.sort((a, b) => a.id - b.id);
+		}
+	}
+
+	useEffect(() => {
+		setVideos([...orderVideos(VIDEO_LIST, order, true)]);
+	}, [setVideos, order]);
+
+	const addVideo = function (title, url) {
+		const newVideo = {
+			id: Math.max(...videos.map((v) => v.id)) + 1,
+			title: title,
+			url: url,
+			rating: 0,
+		};
+		VIDEO_LIST.push(newVideo);
+		setVideos([...orderVideos(VIDEO_LIST, order)]);
+	};
+
+	const updateVideo = function (video, action) {
+		const deleteVideo = async (selectedVideo) => {
+			VIDEO_LIST.splice(VIDEO_LIST.indexOf(selectedVideo), 1);
+			setVideos([...orderVideos(VIDEO_LIST, order)]);
+		};
+
+		const voteOnVideo = async (selectedVideo, action) => {
+			selectedVideo.rating += action == "up" ? 1 : -1;
+			setVideos([...orderVideos(VIDEO_LIST, order)]);
+		};
+
+		let selectedVideo = VIDEO_LIST.find((e) => e.id === video.id);
+
+		if (selectedVideo) {
+			switch (action) {
+				case "up":
+				case "down":
+					voteOnVideo(selectedVideo, action);
+					break;
+				case "delete":
+					deleteVideo(selectedVideo);
+					break;
+			}
+		}
+	};
+
 	return (
 		<>
 			<h1>Video Recommendations</h1>
+			<OrderingSelector order={order} setOrder={setOrder} />
+			<VideoList videos={videos} updateVideo={updateVideo} />
+			<VideoSubmission addVideo={addVideo} />
 		</>
 	);
 };

client/src/components/OrderingSelector.js

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+export default function OrderingSelector({ order, setOrder }) {
+	return (
+		<div className="order-selector">
+			<h3>Select order of videos</h3>
+			<ul>
+				<li>
+					<button
+						disabled={order == "rating_asc"}
+						onClick={() => setOrder("rating_asc")}
+						title="Ascending by vote"
+					>
+						⬆️
+					</button>
+				</li>
+				<li>
+					<button
+						disabled={order == "rating_desc"}
+						onClick={() => setOrder("rating_desc")}
+						title="Descending by vote"
+					>
+						⬇️
+					</button>
+				</li>
+				<li>
+					<button
+						disabled={order == "id"}
+						onClick={() => setOrder("id")}
+						title="Creation order"
+					>
+						➡️
+					</button>
+				</li>
+				<li>
+					<button
+						disabled={order == "random"}
+						onClick={() => setOrder("random")}
+						title="Random order"
+					>
+						🔀
+					</button>
+				</li>
+			</ul>
+		</div>
+	);
+}

client/src/components/Video.js

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+// source: https://stackoverflow.com/questions/3452546/how-do-i-get-the-youtube-video-id-from-a-url
+function youtubeLinkParser(url) {
+	let regExp =
+		/^.*((youtu.be\/)|(v\/)|(\/u\/\w\/)|(embed\/)|(watch\?))\??v?=?([^#&?]*).*/;
+	let match = url.match(regExp);
+	return match && match[7].length == 11 ? match[7] : false;
+}
+
+export default function Video({ video, updateVideo }) {
+	const youtubeId = youtubeLinkParser(video.url);
+
+	return (
+		<li className="video">
+			<h2>
+				<a href={video.url} tabIndex={0}>
+					{video.title}
+				</a>
+			</h2>
+			{youtubeId && (
+				<iframe
+					src={`https://www.youtube.com/embed/${youtubeId}`}
+					title={video.title}
+					frameBorder="0"
+					allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
+					allowFullScreen
+				></iframe>
+			)}
+			<h3>Rating</h3>
+			<div title="Rating" className="rating">
+				{video.rating}
+			</div>
+			<h3>Controls</h3>
+			<div className="controls">
+				<button onClick={() => updateVideo(video, "delete")}>
+					Remove video
+				</button>
+				<button onClick={() => updateVideo(video, "up")}>Up Vote</button>
+				<button onClick={() => updateVideo(video, "down")}>Down Vote</button>
+			</div>
+		</li>
+	);
+}

client/src/components/VideoList.js

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+import Video from "./Video";
+
+export default function VideoList({ videos, updateVideo }) {
+	return (
+		<ul id="videos">
+			{videos.map((video) => (
+				<Video key={video.id} video={video} updateVideo={updateVideo} />
+			))}
+		</ul>
+	);
+}

client/src/components/VideoSubmission.js

@@ -0,0 +1,63 @@
+import { useState } from "react";
+
+export default function VideoSubmisson({ addVideo }) {
+	const [title, setTitle] = useState("");
+	const [url, setUrl] = useState("");
+	const [changed, setChanged] = useState(false);
+
+	const titleValid = !changed || title !== "";
+	const urlValid =
+		!changed || url.match(/youtube.com\/watch\?v=[a-zA-Z0-9-]{11}/);
+
+	const updateField = function (e) {
+		setChanged(true);
+
+		switch (e.target.name) {
+			case "title":
+				setTitle(e.target.value);
+				break;
+			case "url":
+				setUrl(e.target.value);
+				break;
+		}
+	};
+
+	const submitVideo = function (e) {
+		e.preventDefault();
+
+		if (changed && titleValid && urlValid) {
+			addVideo(title, url);
+
+			setChanged(false);
+			setTitle("");
+			setUrl("");
+		}
+	};
+
+	return (
+		<div id="submit-video">
+			<h2>Submit a new video</h2>
+			<form aria-label="Submit a new video" onSubmit={submitVideo}>
+				<label htmlFor="title">Title: </label>
+				<input
+					type="text"
+					name="title"
+					id="title"
+					value={title}
+					onChange={updateField}
+					className={titleValid ? "valid" : "invalid"}
+				/>
+				<label htmlFor="url">Url: </label>
+				<input
+					type="text"
+					name="url"
+					id="url"
+					value={url}
+					onChange={updateField}
+					className={urlValid ? "valid" : "invalid"}
+				/>
+				<button type="submit">Submit</button>
+			</form>
+		</div>
+	);
+}