ayunWebEPK/index.html

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2022-07-26 10:16:23 -07:00
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<title>ayunWebEPK</title>
<script type="text/javascript" src="jszip.min.js"></script>
<script type="text/javascript" src="pako_deflate.min.js"></script>
<script type="text/javascript" src="sha1.min.js"></script>
<link rel="preconnect" href="https://fonts.googleapis.com"/>
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin/>
<link href="https://fonts.googleapis.com/css2?family=Nunito&display=swap" rel="stylesheet"/>
<style>
a:not([href]) {
display: none;
}
*, ::file-selector-button {
font-family: 'Nunito', sans-serif;
}
body {
background-color: #111111;
color: #dddddd;
}
input[disabled] {
opacity: 0.8;
}
::file-selector-button, progress {
background-color: #343434;
color: #eeeeee;
border: 1px solid #eeeeee;
border-radius: 4px;
}
a, input {
color: #dddddd;
}
progress {
height: 1em;
-webkit-appearance: none;
-moz-appearance: none;
appearance: none;
}
progress[value="0"][max="1"] {
display: none;
}
::-moz-progress-bar {
background-color: #eeeeee;
}
::-webkit-progress-value {
background-color: #eeeeee;
}
::-webkit-progress-bar {
background-color: #343434;
border-radius: 4px;
}
</style>
</head>
<body>
<h1>ayunWebEPK</h1>
<p>Compile EPK files in your browser!</p>
Select .ZIP archive: <input type="file" onchange="selectFile(this);"/>
<br/>
Select resources folder: <input type="file" onchange="selectFile(this);" directory webkitdirectory/>
<br/>
<progress value="0" max="1"></progress>
<a download="assets.epk">Download your EPK!</a>
<script>
const downloadLink = document.querySelector('a');
const progressBar = document.querySelector('progress');
const fileElems = document.querySelectorAll('input[type=file]');
function concatTypedArrays(a, b) {
const c = new (a.constructor)(a.length + b.length);
c.set(a, 0);
c.set(b, a.length);
return c;
}
const textEncoder = new TextEncoder();
function generateIntArray(num) {
return Uint8Array.of((num >>> 24) & 0xFF, (num >>> 16) & 0xFF, (num >>> 8) & 0xFF, num & 0xFF);
}
function generateShortArray(num) {
return Uint8Array.of((num >>> 8) & 0xFF, num & 0xFF);
}
function generateUTF(str) {
return concatTypedArrays(generateShortArray(str.length), textEncoder.encode(str));
}
let comment = '# eaglercraft package file - generated with ayunWebEPK by ayunami2000';
let baseEPK = textEncoder.encode('EAGPKG!!');
baseEPK = concatTypedArrays(baseEPK, generateUTF(comment));
let currentEPK = null;
function selectFile(fileElem) {
downloadLink.removeAttribute('href');
fileElems.forEach(elem => elem.disabled = true);
if (fileElem.files.length == 1) {
const zipFile = fileElem.files[0];
var reader = new FileReader();
reader.onload = function(e) {
const zip = new JSZip();
zip.loadAsync(e.target.result).then(function(zip) {
progressBar.max = Object.keys(zip.files).length;
let i = 0;
for (let fileName in zip.files) {
if (fileName.endsWith('/')) {
progressBar.value = i++;
if (i == progressBar.max) {
wrapItUp(fileElem);
}
continue;
}
zip.files[fileName].async('uint8array').then(function(data) {
processFile(fileName, data);
progressBar.value = i++;
if (i == progressBar.max) {
wrapItUp(fileElem);
}
});
}
});
};
reader.readAsArrayBuffer(zipFile);
} else if (fileElem.files.length > 1) {
progressBar.max = fileElem.files.length;
let i = 0;
for (let file of fileElem.files) {
var reader = new FileReader();
reader.onload = function(e) {
processFile(file.webkitRelativePath.slice(file.webkitRelativePath.indexOf('/') + 1), new Uint8Array(e.target.result));
progressBar.value = i++;
if (i == progressBar.max) {
wrapItUp(fileElem);
}
};
reader.readAsArrayBuffer(file);
}
} else {
fileElems.forEach(elem => elem.removeAttribute('disabled'));
}
}
function processFile(name, file) {
currentEPK = currentEPK == null ? generateUTF('<file>') : concatTypedArrays(currentEPK, generateUTF('<file>'));
currentEPK = concatTypedArrays(currentEPK, generateUTF(name));
currentEPK = concatTypedArrays(currentEPK, new Uint8Array(sha1.arrayBuffer(file.buffer)));
currentEPK = concatTypedArrays(currentEPK, generateIntArray(file.length));
currentEPK = concatTypedArrays(currentEPK, file);
currentEPK = concatTypedArrays(currentEPK, generateUTF('</file>'));
}
function wrapItUp(fileElem) {
currentEPK = concatTypedArrays(currentEPK, generateUTF(' end'));
currentEPK = concatTypedArrays(baseEPK, new Uint8Array(pako.deflate(currentEPK, { level: 9 })));
const blob = new Blob([ currentEPK ], { type: 'application/octet-stream' });
downloadLink.href = window.URL.createObjectURL(blob);
currentEPK = null;
fileElem.value = '';
progressBar.value = 0;
progressBar.max = 1;
fileElems.forEach(elem => elem.removeAttribute('disabled'));
}
</script>
</body>
</html>