| 1 | const sleep = (ms) => new Promise(resolve => setTimeout(resolve, ms)); |
| 2 | |
| 3 | /** |
| 4 | * Safari iOS pls |
| 5 | */ |
| 6 | const formSubmitPolyfill = (form, callback) => { |
| 7 | if (form.requestSubmit) { |
| 8 | form.requestSubmit(); |
| 9 | } else { |
| 10 | callback(); |
| 11 | } |
| 12 | } |
| 13 | |
| 14 | const createGenreListWithClickEvent = (genreList, genres, callback) => { |
| 15 | genreList.append(...genres.map((genre) => { |
| 16 | const name = genre["name"]; |
| 17 | const li = document.createElement("li"); |
| 18 | li.setAttribute("data-name", name); |
| 19 | li.addEventListener("click", callback); |
| 20 | li.appendChild(document.createTextNode(name)); |
| 21 | return li; |
| 22 | })); |
| 23 | } |
| 24 | |
| 25 | const relativeToCtx = (x1, x2, y1, y2, ctx) => { |
| 26 | const newX = x1 + x2; |
| 27 | const newY = y1 + y2; |
| 28 | ctx.lineTo(newX, newY); |
| 29 | return [newX, newY]; |
| 30 | } |
| 31 | |
| 32 | /** |
| 33 | * Return (x,y) of canvas |
| 34 | */ |
| 35 | const getDimensions = (canvas) => [canvas.width, canvas.height]; |
| 36 | |
| 37 | /** |
| 38 | * Return (x,y) midpoint of canvas |
| 39 | */ |
| 40 | const getCenter = (canvas) => getDimensions(canvas).map((dim) => dim / 2); |
| 41 | |
| 42 | /** |
| 43 | * Draw champion box and clear background. |
| 44 | */ |
| 45 | const drawWinner = (canvas) => { |
| 46 | const ctx = canvas.getContext("2d"); |
| 47 | const [width, height] = getDimensions(canvas); |
| 48 | const [mid_x, mid_y] = getCenter(canvas); |
| 49 | const rect_width = width * .5; |
| 50 | const rect_height = height * .1; |
| 51 | ctx.strokeRect(mid_x - rect_width / 2, mid_y - rect_height / 2, rect_width, rect_height); |
| 52 | ctx.clearRect(mid_x - rect_width / 2, mid_y - rect_height / 2, rect_width, rect_height); |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * Draws a path in context from the current location to a point xDist * left, yDist * up away from it. |
| 57 | * @param ctx RenderingContext |
| 58 | * @param x, y float current location |
| 59 | * @param x, y float distance away |
| 60 | * @param up, left (-1|1) directions |
| 61 | * @return [newNodeX, newNodeY] |
| 62 | */ |
| 63 | const drawBranchFrom = (ctx, x, y, xDist, yDist, left, up) => { |
| 64 | const newX = x + (xDist * left) |
| 65 | const newY = y + (yDist * up) |
| 66 | ctx.lineTo(x, newY); |
| 67 | ctx.lineTo(newX, newY); |
| 68 | return [newX, newY]; |
| 69 | } |
| 70 | |
| 71 | const drawArtistOnCtx = (ctx, artistName, x, y) => ctx.strokeText(artistName, x, y); |
| 72 | |
| 73 | /** |
| 74 | * Draws paths to the terminal nodes of a round |
| 75 | * @param x, y the point representation of the start of the branch |
| 76 | */ |
| 77 | const drawMatchup = (canvas, x, y, iter, left, artist1, artist2) => { |
| 78 | const ctx = canvas.getContext("2d"); |
| 79 | const [width, height] = getDimensions(canvas); |
| 80 | |
| 81 | const drawBranchUp = (xDist, yDist) => drawBranchFrom(ctx, x, y, xDist, yDist, left, 1); |
| 82 | const drawBranchDown = (xDist, yDist) => drawBranchFrom(ctx, x, y, xDist, yDist, left, -1); |
| 83 | const drawArtist = (artistName, x, y) => drawArtistOnCtx(ctx, artistName, x, y); |
| 84 | |
| 85 | ctx.beginPath(); |
| 86 | ctx.moveTo(x, y); |
| 87 | drawArtist( |
| 88 | artist1["name"], |
| 89 | ...drawBranchUp(width / iter, height / iter) |
| 90 | ); |
| 91 | ctx.moveTo(x, y); |
| 92 | drawArtist( |
| 93 | artist2["name"], |
| 94 | ...drawBranchDown(width / iter, height / iter) |
| 95 | ); |
| 96 | ctx.stroke(); |
| 97 | } |
| 98 | |
| 99 | const drawBracket = (canvas, artists) => { |
| 100 | drawWinner(canvas); |
| 101 | const [mid_x, mid_y] = getCenter(canvas); |
| 102 | const groups = 4; |
| 103 | const rounds = Math.log2(artists.length / groups); |
| 104 | for (let group = 1; group <= groups; group++) { |
| 105 | for (let round = 0; round < rounds; round++) { |
| 106 | const matchup = [artists.shift(), artists.pop()]; |
| 107 | drawMatchup(canvas, mid_x, mid_y, 2 * round, Math.pow(-1, group), ...matchup); |
| 108 | } |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | window.onload = () => { |
| 113 | const lStorage = window.localStorage; |
| 114 | const genreList = document.getElementById("genre-list"); |
| 115 | const genreInput = document.getElementById("genre-input"); |
| 116 | const genreForm = document.getElementById("genre-form"); |
| 117 | const canvas = document.getElementById("bracket"); |
| 118 | |
| 119 | const formSubmitAction = () => { |
| 120 | fetch(encodeURI(`http://localhost:8080/artist/genre?genre_name=${genreInput.value}`)) |
| 121 | .then((response) => response.json()) |
| 122 | .then((data) => drawBracket(canvas, data.slice(0, 33))); |
| 123 | } |
| 124 | |
| 125 | const createGenreList = (genreList, genres) => { |
| 126 | return createGenreListWithClickEvent(genreList, genres, (e) => { |
| 127 | genreInput.value = e.target.innerText; |
| 128 | formSubmitPolyfill(genreForm, formSubmitAction); |
| 129 | }) |
| 130 | } |
| 131 | let genres = JSON.parse(lStorage.getItem("genres")) |
| 132 | if (genres === null) { |
| 133 | fetch("http://localhost:8080/genre") |
| 134 | .then((response) => response.text()) |
| 135 | .then((text) => { |
| 136 | window.localStorage.setItem("genres", text); |
| 137 | genres = JSON.parse(text); |
| 138 | createGenreList(genreList, genres); |
| 139 | }); |
| 140 | } else { |
| 141 | createGenreList(genreList, genres); |
| 142 | } |
| 143 | |
| 144 | genreForm.addEventListener("submit", (e) => { |
| 145 | e.preventDefault(); |
| 146 | formSubmitAction() |
| 147 | }); |
| 148 | |
| 149 | genreInput.addEventListener("input", (e) => { |
| 150 | const input = e.target; |
| 151 | Array.from(genreList.children).forEach((item) => item.style.display= item.dataset.name.includes(input.value.toLowerCase()) ? "block" : "none"); |
| 152 | }); |
| 153 | genreInput.addEventListener("focus", (e) => { |
| 154 | genreList.style.display = "block"; |
| 155 | }); |
| 156 | genreInput.addEventListener("blur", (e) => { |
| 157 | sleep(150).then(() => genreList.style.display = "none"); |
| 158 | }); |
| 159 | |
| 160 | |
| 161 | canvas.width = window.innerWidth; |
| 162 | canvas.height = window.innerHeight; |
| 163 | drawBracket(canvas, []); |
| 164 | |
| 165 | const bgImg = new Image(); |
| 166 | bgImg.onload = () => { |
| 167 | const ctx = canvas.getContext("2d"); |
| 168 | //ctx.mozImageSmoothingEnabled = false; |
| 169 | //ctx.webkitImageSmoothingEnabled = false; |
| 170 | //ctx.msImageSmoothingEnabled = false; |
| 171 | //ctx.imageSmoothingEnabled = false; |
| 172 | ctx.drawImage( |
| 173 | bgImg, |
| 174 | 0, |
| 175 | 0, |
| 176 | (canvas.width / bgImg.width) * bgImg.width, |
| 177 | (canvas.height / bgImg.height) * bgImg.height |
| 178 | ); |
| 179 | } |
| 180 | |
| 181 | const upload = document.getElementById("image-upload"); |
| 182 | upload.addEventListener("change", (e) => { |
| 183 | bgImg.src = URL.createObjectURL(e.target.files[0]); |
| 184 | }); |
| 185 | } |