mirror of
https://github.com/BrenBroZAYT/ScratchYTOG.github.io.git
synced 2026-06-13 16:40:02 +00:00
BrenBroZAYT
529 lines
16 KiB
HTML
529 lines
16 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>.sb downloader (Scratch Downloader By BrenBroZAYT)</title>
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<meta charset="utf8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta name="referrer" content="no-referrer">
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<style>
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/* basic styles to make things look nicer */
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body {
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font-family: sans-serif;
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width: 480px;
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margin: 24px auto;
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}
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p {
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margin: 8px 0 16px 0;
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}
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h1 {
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font-size: 54px;
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line-height: 72px;
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margin: 0;
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}
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h2 {
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font-size: 24px;
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line-height: 32px;
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margin: 16px 0 0 0;
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}
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h1, h2 {
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font-weight: normal;
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}
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a {
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color: #FFFF00;
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text-decoration: underline;
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cursor: pointer;
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}
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a:visited {
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color: #73c;
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}
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a:active {
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color: #03a;
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}
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code {
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font-family: Menlo, Monaco, Consolas, Courier New, monospace;
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background: #f1f1f1;
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border-radius: 3px;
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margin: 3px;
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color: #000;
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}
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/* project ID input */
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#project-select {
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font-size: 24px;
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line-height: 32px;
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border: none;
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width: 100%;
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color: rgba(0, 0, 0, 0.4);
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}
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#project-select:focus {
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color: rgba(0, 0, 0, 1);
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}
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#project-select:disabled {
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background: white;
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}
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/* project type input */
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#type-container {
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width: 100%;
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text-align: center;
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}
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:disabled {
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cursor: not-allowed;
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}
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/* progress bar */
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#progress-bar {
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position: relative;
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width: 100%;
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height: 35px;
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margin-top: 10px;
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}
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#progress-bar-fill {
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position: absolute;
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height: 100%;
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top: 0;
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bottom: 0;
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left: 0;
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width: 0;
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background-color: #cde;
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transition: background-color 0.3s, width 0.3s;
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}
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#progress-bar-fill[state=error] {
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background-color: #eaa;
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}
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#progress-bar-fill[state=success] {
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background-color: #aea;
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}
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#progress-bar-text {
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position: absolute;
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top: 50%;
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left: 5px;
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transform: translateY(-50%);
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z-index: 10;
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}
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/* asset list */
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#asset-list-container {
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margin-top: 10px;
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}
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#asset-list .name {
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font-size: 10px;
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}
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#asset-list .preview {
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max-width: 360px;
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}
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#asset-list {
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text-align: center;
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}
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#asset-list:empty:after {
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content: 'Nothing to preview';
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font-style: italic;
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}
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#asset-list tr:hover td > * {
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outline: 1px solid black;
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}
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</style>
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</head>
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<body>
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<h1><code>.sb</code> downloader</h1>
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<p><code>.sb</code> downloader downloads <a href="https://scratch.mit.edu/">Scratch</a> 1, 2, or 3 projects. Enter the project ID or URL then choose the format.</p>
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<input id="project-select" value="https://scratch.mit.edu/projects/">
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<div id="type-container">
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<b>Download project as</b>
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<button class="download-button" data-type="sb">.sb</button>
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<button class="download-button" data-type="sb2">.sb2</button>
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<button class="download-button" data-type="sb3">.sb3</button>
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</div>
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<div id="progress-bar" hidden>
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<div id="progress-bar-fill"></div>
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<div id="progress-bar-text"></div>
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</div>
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<div id="download-link"></div>
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<h2>Asset Viewer</h2>
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<label>
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<input type="checkbox" id="asset-list-toggle"> Enable asset viewer
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</label>
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<div id="asset-list-container" hidden>
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<i><small>Some projects cannot be previewed.</small></i>
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<table width="100%">
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<thead>
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<tr>
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<th width="50%">Name</th>
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<th width="50%">Preview</th>
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</tr>
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</thead>
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<tbody id="asset-list">
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<!-- javascript will insert the assets here -->
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</tbody>
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</table>
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</div>
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<h2>Code</h2>
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<p><code>.sb</code> downloader is <a href="https://github.com/forkphorus/sb-downloader">open source</a>.</p>
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<h2>Credits</h2>
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<p>Thanks to <a href="https://scratch.mit.edu/">Scratch</a> for providing a sufficient public API. The general look of the downloader is inspired by <a href="https://phosphorus.github.io/">phosphorus</a>. The <a href="https://stuk.github.io/jszip/">JSZip</a> library is used for creating zip archives.</p>
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<script src="jszip.min.js"></script>
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<script src="loader.js"></script>
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<script>
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(function() {
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'use strict';
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// Element references
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const projectInput = document.querySelector('#project-select');
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const progressBarFill = document.querySelector('#progress-bar-fill');
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const progressBarText = document.querySelector('#progress-bar-text');
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const progressBarContainer = document.querySelector('#progress-bar');
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const assetTableContainer = document.querySelector('#asset-list-container');
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const assetTable = document.querySelector('#asset-list');
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const assetTableToggle = document.querySelector('#asset-list-toggle');
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const downloadLinkEl = document.querySelector('#download-link');
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const downloadButtons = document.getElementsByClassName('download-button');
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// The last loaded project, if any.
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let lastResult = null;
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// Returns an object containing all the query string parameters
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function getQuery(queryString) {
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queryString = queryString || window.location.search;
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const query = {};
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const pairs = (queryString[0] === '?' ? queryString.substr(1) : queryString).split('&');
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for (var i = 0; i < pairs.length; i++) {
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const pair = pairs[i].split('=');
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const key = decodeURIComponent(pair[0]);
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const value = decodeURIComponent(pair[1] || '');
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// If either key or value is empty, omit it.
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if (key && value) {
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query[key] = value;
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}
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}
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return query;
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}
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// Sets a query string value without reloading the page.
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function setQuery(key, value) {
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const query = getQuery();
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query[key] = value;
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let url = '?';
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for (const key of Object.keys(query)) {
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const value = query[key];
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// omit parameters with empty keys or values
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// allows '' as a value to remove a parameter
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if (!key || !value) {
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continue;
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}
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if (url.length > 1) {
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url += '&';
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}
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url += encodeURIComponent(key) + '=' + encodeURIComponent(value);
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}
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history.replaceState({}, '', url);
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}
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// Project ID input
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projectInput.addEventListener('focus', function() {
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if (getId()) {
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projectInput.select();
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}
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})
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projectInput.addEventListener('input', function() {
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const id = getId() || '';
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projectInput.value = 'https://scratch.mit.edu/projects/' + id;
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setButtonsEnabled(!!id);
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resetAssets();
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hideProgress();
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removeDownloadLink();
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});
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function extractId(input) {
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const match = projectInput.value.match(/\d+/);
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return match ? match[0] : null;
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}
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function getId() {
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return extractId(projectInput.value);
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}
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// Type input
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for (const button of downloadButtons) {
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button.addEventListener('click', function() {
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loadInput(getId(), button.dataset.type);
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});
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}
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function setInputEnabled(enabled) {
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projectInput.disabled = !enabled;
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}
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function setButtonsEnabled(enabled) {
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for (const el of downloadButtons) {
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el.disabled = !enabled;
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}
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}
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function disableInputs() {
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setInputEnabled(false);
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setButtonsEnabled(false);
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}
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function enableInputs() {
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setInputEnabled(true);
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setButtonsEnabled(true);
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}
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// Progress bar methods
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// Sets the current progress. Expects a number between 0 and 1
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function setProgress(progress) {
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progressBarFill.style.width = (10 + progress * 90) + '%';
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}
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// Resets the progress bar
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function resetProgress() {
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setProgress(0);
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setProgressState('Loading...', '');
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}
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// Shows the progress bar
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function showProgress() {
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progressBarContainer.hidden = false;
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}
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// Hides the progress bar
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function hideProgress() {
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progressBarContainer.hidden = true;
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}
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// Sets the text and 'state' of the progress bar (usually changes color)
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function setProgressState(message, state) {
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progressBarText.textContent = message;
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progressBarFill.setAttribute('state', state || '');
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}
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// Install progress hooks
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let finishedTasks = 0;
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let totalTasks = 0;
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function updateProgressBarHooks() {
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setProgress(finishedTasks / totalTasks);
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setProgressState('\u23f3 Downloading project files (' + finishedTasks + '/' + totalTasks + ')');
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}
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SBDL.progressHooks.start = function() {
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finishedTasks = 0;
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totalTasks = 0;
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};
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SBDL.progressHooks.newTask = function() {
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totalTasks++;
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updateProgressBarHooks();
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};
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SBDL.progressHooks.finishTask = function() {
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finishedTasks++;
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updateProgressBarHooks();
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};
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// Asset listing
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assetTableToggle.addEventListener('change', function(e) {
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toggleAssets(e.target.checked);
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e.preventDefault();
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});
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// Toggles the asset viewer. Might load or reset the asset list.
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function toggleAssets(enabled) {
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if (enabled) {
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assetTableContainer.hidden = false;
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setQuery('assets', 'on');
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if (lastResult && lastResult.files) {
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displayAssets(lastResult.files);
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}
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} else {
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assetTableContainer.hidden = true;
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setQuery('assets', '');
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resetAssets();
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}
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assetTableToggle.checked = enabled;
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}
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// Removes all existing assets in the list
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function resetAssets() {
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while (assetTable.firstChild) {
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assetTable.removeChild(assetTable.firstChild);
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}
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}
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// Displays a list of files
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function displayAssets(files) {
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resetAssets();
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// Used to decode text in bufferToString()
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const decoder = new TextDecoder('utf8');
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function bufferToString(buffer) {
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return decoder.decode(new Uint8Array(buffer));
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}
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function getPreview(file) {
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const path = file.path;
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const extension = path.split('.').pop();
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const IMAGE_EXTENSIONS = ['png', 'jpg', 'jpeg', 'svg'];
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const AUDIO_EXTENSIONS = ['mp3', 'wav'];
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const TEXT_EXTENSIONS = ['json'];
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// Returns an element indicating that this asset cannot be previewed.
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function cannotPreview() {
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const text = document.createElement('i');
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text.textContent = 'cannot preview';
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return text;
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}
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if (IMAGE_EXTENSIONS.includes(extension)) {
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if (!(file.data instanceof ArrayBuffer)) {
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return cannotPreview();
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}
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// Images are loaded by setting an <img> src to a Blob URL
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const type = extension === 'svg' ? 'svg+xml' : extension;
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const blob = new Blob([file.data], {type: 'image/' + type});
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const url = URL.createObjectURL(blob);
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const img = document.createElement('img');
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img.src = url;
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return img;
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} else if (AUDIO_EXTENSIONS.includes(extension)) {
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if (!(file.data instanceof ArrayBuffer)) {
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return cannotPreview();
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}
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// Sounds are loaded by loading a Blob URL in an <audio> with controls enabled
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const blob = new Blob([file.data]);
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const url = URL.createObjectURL(blob);
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const audio = document.createElement('audio');
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audio.src = url;
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// enabling controls ensures that it will be visible
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audio.controls = true;
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audio.autoplay = false;
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return audio;
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} else if (TEXT_EXTENSIONS.includes(extension)) {
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// Text things are loaded using a readonly <textarea>
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const textarea = document.createElement('textarea');
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textarea.readOnly = true;
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textarea.textContent = file.data;
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return textarea;
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}
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return cannotPreview();
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}
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for (const file of files) {
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const row = document.createElement('tr');
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const nameCell = document.createElement('td');
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const previewCell = document.createElement('td');
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nameCell.classList.add('name');
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nameCell.appendChild(document.createTextNode(file.path));
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previewCell.classList.add('preview');
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previewCell.appendChild(getPreview(file));
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row.appendChild(nameCell);
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row.appendChild(previewCell);
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assetTable.appendChild(row);
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}
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}
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// Loads the currently input project
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function loadInput(id, type) {
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setQuery('id', id);
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setQuery('type', type);
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removeDownloadLink();
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disableInputs();
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resetAssets();
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resetProgress();
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showProgress();
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downloadProject(id, type)
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.then(() => {
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setProgressState('\u2705 Done', 'success');
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enableInputs();
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setProgress(1);
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})
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.catch((err) => {
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console.error(err);
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let error = '\u274c Project is not available as a .' + type;
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if (err && err.message) {
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if (err.probableType) {
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error += ' (It is available as a .' + err.probableType + ')';
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} else if (err.message.includes('404') && type === 'sb3') {
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error += ' (Project does not exist)';
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}
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}
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setProgressState(error, 'error');
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enableInputs();
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setProgress(1);
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});
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}
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// Starts loading a project. Downloads it when complete.
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function downloadProject(id, type) {
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lastResult = null;
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return SBDL.loadProject(id, type)
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.then((r) => {
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lastResult = r;
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setProgressState('Creating archive...');
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// Convert the result to a Blob so it's easier to download.
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// The result can either give us a list of files to put in an archive, or an ArrayBuffer.
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if (r.type === 'zip') {
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return SBDL.createArchive(r.files, setProgress);
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} else if (r.type === 'buffer') {
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return new Blob([r.buffer]);
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} else {
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throw new Error('unknown type: ' + r.type);
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}
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})
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.then((blob) => {
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// Only display assets if there are some files to preview and they will be visible.
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if (lastResult.files && !assetTableContainer.hidden) {
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displayAssets(lastResult.files);
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}
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const url = URL.createObjectURL(blob);
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const filename = lastResult.title + '.' + lastResult.extension;
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const size = blob.size / 1024 / 1024;
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const a = document.createElement('a');
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a.href = url;
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a.download = filename;
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a.textContent = 'Download ' + filename + ' (' + size.toFixed(2) + ' MiB)';
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downloadLinkEl.appendChild(a);
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a.click();
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});
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}
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function removeDownloadLink() {
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if (downloadLinkEl.firstChild) {
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downloadLinkEl.removeChild(downloadLinkEl.firstChild);
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}
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}
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// Load URL parameters
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const searchQuery = getQuery();
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if (searchQuery.id) {
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projectInput.value = 'https://scratch.mit.edu/projects/' + searchQuery.id;
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} else {
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projectInput.focus();
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setTimeout(function() {
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projectInput.selectionStart = projectInput.selectionEnd = projectInput.value.length;
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});
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}
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setButtonsEnabled(!!getId());
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if (searchQuery.assets === 'on') {
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toggleAssets(true);
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}
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if (searchQuery.id && searchQuery.type) {
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loadInput(searchQuery.id, searchQuery.type);
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}
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}());
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</script>
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</body>
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</html>
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