Create EPK editor

ayunEPKCompiler.js

@@ -0,0 +1,130 @@
+window.compileEPK = function() {
+	let old = false;
+
+	// https://stackoverflow.com/a/18639903/6917520
+
+	const crc32 = (function() {
+		let table = new Uint32Array(256);
+
+		for (let i = 256; i--;) {
+			let tmp = i;
+
+			for (let k = 8; k--;) {
+				tmp = tmp & 1 ? 3988292384 ^ tmp >>> 1 : tmp >>> 1;
+			}
+
+			table[i] = tmp;
+		}
+
+		return function(data) {
+			let crc = -1;
+
+			for (let i = 0, l = data.length; i < l; i++) {
+				crc = crc >>> 8 ^ table[crc & 255 ^ data[i]];
+			}
+
+			return (crc ^ -1) >>> 0;
+		};
+	})();
+
+	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 generateLongArray(num) {
+		return Uint8Array.of((num >>> 56) & 0xFF, (num >>> 48) & 0xFF, (num >>> 40) & 0xFF, (num >>> 32) & 0xFF, (num >>> 24) & 0xFF, (num >>> 16) & 0xFF, (num >>> 8) & 0xFF, num & 0xFF);
+	}
+	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));
+	}
+	function generateUTFByte(str) {
+		return concatTypedArrays(Uint8Array.of(str.length), textEncoder.encode(str));
+	}
+
+	let comment = '# eaglercraft package file - generated with ayunWebEPK by ayunami2000';
+
+	let commentNew = '\n\n # Eagler EPK v2.0 (c) $$YEAR$$ Calder Young\n # generated with ayunWebEPK by ayunami2000';
+
+	let baseEPK = textEncoder.encode('EAGPKG!!');
+
+	baseEPK = concatTypedArrays(baseEPK, generateUTF(comment));
+
+	let baseEPKNew = textEncoder.encode('EAGPKG$$');
+	
+	baseEPKNew = concatTypedArrays(baseEPKNew, generateUTFByte('ver2.0'));
+
+	baseEPKNew = concatTypedArrays(baseEPKNew, generateUTFByte('my-cool.epk'));
+
+	let currentEPK = null;
+
+	function processFile(name, type, file) {
+		if (old) {
+			currentEPK = currentEPK == null ? generateUTF('<file>') : concatTypedArrays(currentEPK, generateUTF('<file>'));
+			currentEPK = concatTypedArrays(currentEPK, generateUTF(name));
+			currentEPK = concatTypedArrays(currentEPK, new Uint8Array(sha1.arrayBuffer(file.buffer)));
+			currentEPK = concatTypedArrays(currentEPK, generateIntArray(file.byteLength));
+			currentEPK = concatTypedArrays(currentEPK, file);
+			currentEPK = concatTypedArrays(currentEPK, generateUTF('</file>'));
+		} else {
+			currentEPK = concatTypedArrays(currentEPK, textEncoder.encode(type));
+			currentEPK = concatTypedArrays(currentEPK, generateUTFByte(name));
+			currentEPK = concatTypedArrays(currentEPK, generateIntArray(file.byteLength + 5));
+			currentEPK = concatTypedArrays(currentEPK, generateIntArray(crc32(file)));
+			currentEPK = concatTypedArrays(currentEPK, file);
+			currentEPK = concatTypedArrays(currentEPK, textEncoder.encode(':>'));
+		}
+	}
+	
+	function wrapItUp(size) {
+		if (old) {
+			currentEPK = concatTypedArrays(currentEPK, generateUTF(' end'));
+			currentEPK = concatTypedArrays(baseEPK, new Uint8Array(pako.deflate(currentEPK, { level: 9 })));
+		} else {
+			let currBaseEPK = baseEPKNew;
+			currBaseEPK = concatTypedArrays(currBaseEPK, generateUTF(commentNew.replace('$$YEAR$$', new Date().getFullYear())));
+			currBaseEPK = concatTypedArrays(currBaseEPK, generateLongArray(Date.now()));
+			currBaseEPK = concatTypedArrays(currBaseEPK, generateIntArray(size + 1));
+			currBaseEPK = concatTypedArrays(currBaseEPK, Uint8Array.of(90));
+			currentEPK = concatTypedArrays(currentEPK, textEncoder.encode('END$'));
+			currentEPK = concatTypedArrays(currBaseEPK, new Uint8Array(pako.deflate(currentEPK, { level: 9 })));
+			currentEPK = concatTypedArrays(currentEPK, textEncoder.encode(':::YEE:>'));
+		}
+		const blob = new Blob([ currentEPK ], { type: 'application/octet-stream' });
+		currentEPK = null;
+		old = false;
+		return blob;
+	}
+
+	return async function(files, oldMode, fileev) {
+		let onfile = function() {};
+		if (fileev != null) {
+			onfile = fileev;
+		}
+		currentEPK = null;
+		old = oldMode;
+		// files is same format as output from decompiler
+		if (!old) {
+			currentEPK = textEncoder.encode('HEAD');
+			currentEPK = concatTypedArrays(currentEPK, generateUTFByte('file-type'));
+			const fileType = 'epk/resources';
+			currentEPK = concatTypedArrays(currentEPK, generateIntArray(fileType.length));
+			currentEPK = concatTypedArrays(currentEPK, textEncoder.encode(fileType));
+			currentEPK = concatTypedArrays(currentEPK, Uint8Array.of(62));
+		}
+		for (const file of files) {
+			processFile(file.name, file.type, new Uint8Array(await file.data.arrayBuffer()));
+			onfile();
+		}
+		return wrapItUp(files.length);
+	};
+};

ayunEPKDecompiler.js

@@ -1,8 +1,10 @@
-window.decompileEPK = function () {
+window.decompileEPK = function() {
 	let currentOffset = 0;
 
 	let numFiles = 0;
 
+	let onfile = function() {};
+
 	function detectOldHeader(epkData) {
 		const oldHeader = "EAGPKG!!";
 		for (let i = 0; i < oldHeader.length; i++) {
@@ -124,8 +126,11 @@ window.decompileEPK = function () {
 		while ((file = readFileOld(data)) != null) {
 			if (file == -1) return null;
 			files.push(file);
+			onfile();
 		}
 
+		onfile = function() {};
+
 		return files;
 	}
 
@@ -162,8 +167,11 @@ window.decompileEPK = function () {
 		while ((file = readFileNew(data)) != null) {
 			if (file == -1) return null;
 			files.push(file);
+			onfile();
 		}
 
+		onfile = function() {};
+
 		return files;
 	}
 
@@ -220,7 +228,11 @@ window.decompileEPK = function () {
 		};
 	}
 
-	return async function(rawBuffer) {
+	return async function(rawBuffer, fileev) {
+		if (fileev != null) {
+			onfile = fileev;
+		}
+
 		let epkData = new Uint8Array(rawBuffer);
 
 		if (detectOldHeader(epkData)) {

builder.html

@@ -0,0 +1,330 @@
+<!DOCTYPE html>
+<html>
+	<head>
+		<script async src="https://arc.io/widget.min.js#HEPCFa3K"></script>
+		<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.min.js"></script>
+		<script type="text/javascript" src="sha1.min.js"></script>
+		<script type="text/javascript" src="ayunEPKDecompiler.js"></script>
+		<script type="text/javascript" src="ayunEPKCompiler.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], button[disabled] {
+				opacity: 0.8;
+			}
+			input[type=checkbox] {
+				-webkit-appearance: initial;
+        		-moz-appearance: initial;
+        		appearance: initial;
+				width: 1.5em;
+				height: 1.5em;
+				margin: 0;
+			}
+			input[type=checkbox]:checked {
+				background-color: #eeeeee;
+			}
+			input[type=checkbox]:before {
+				content: ':>';
+				text-align: center;
+				color: #dddddd;
+				margin-left: 0.3em;
+			}
+			input[type=checkbox]:checked:before {
+				color: #343434;
+			}
+			input[type=checkbox]:after {
+				content: 'No';
+				color: #dddddd;
+				margin-left: 0.6em;
+			}
+			input[type=checkbox]:checked:after {
+				content: 'Yes';
+			}
+			@supports (-webkit-touch-callout: none) or (background: -webkit-named-image(i)) {
+				input[type=checkbox]:after {
+					content: 'no';
+				}
+				input[type=checkbox]:checked:after {
+					content: 'yes';
+				}
+			}
+			@supports (-moz-appearance: none) {
+				input[type=checkbox]:after {
+					content: 'No.';
+				}
+				input[type=checkbox]:checked:after {
+					content: 'Yes.';
+				}
+			}
+			::file-selector-button, progress, input[type=checkbox], button, select, input[type=text] {
+				background-color: #343434;
+				color: #eeeeee;
+				border: 1px solid #eeeeee;
+				border-radius: 4px;
+			}
+			a, input[type=file] {
+				color: #dddddd;
+			}
+			progress {
+				height: 1em;
+			}
+			progress, ::-webkit-file-upload-button {
+				-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;
+			}
+			#editor.modei pre, #editor.modei audio, #editor.modea pre, #editor.modea img, #editor.modet img, #editor.modet audio, #editor.model {
+				display: none;
+			}
+		</style>
+	</head>
+	<body>
+		<sub><a href=".">Want to compile one instead?</a></sub>
+		<br/>
+		<sub><a href="decompile.html">Want to decompile one instead?</a></sub>
+		<h1>ayunWebEPK</h1>
+		<p>Customize EPK files in your browser!</p>
+		Select base .EPK: <input type="file" onchange="selectFile(this);" accept=".epk"/>
+		<br/>
+		Compile to legacy format: <input type="checkbox"/>
+		<br/>
+		<button onclick="compileIt(document.querySelector('input[type=file]'));" disabled>Compile it!</button>
+		<br/>
+		<br/>
+		<progress value="0" max="1"></progress>
+		<a download="my-cool.epk">Download your EPK!</a>
+		<div id="editor" class="model">
+			<input type="text" placeholder="Search or enter file name..."/>
+			<select></select>
+			<button onclick="createFile(this.previousElementSibling.previousElementSibling.value);" disabled>Create file...</button>
+			<button onclick="deleteCurrentFile();">Delete file...</button>
+			<br/>
+			<h3></h3>
+			Change this file: <input type="file" onchange="changeFile(this);"/>
+			<br/>
+			<img/>
+			<audio controls></audio>
+			<pre></pre>
+		</div>
+		<script>
+			const downloadLink = document.querySelectorAll('a')[2];
+			const progressBar = document.querySelector('progress');
+			const oldBox = document.querySelector('input[type=checkbox]');
+			const compileBtn = document.querySelector('button');
+			const editor = document.getElementById('editor');
+			const dropdown = document.querySelector('select');
+			const editorName = editor.querySelector('h3');
+			const editorImage = editor.querySelector('img');
+			const editorAudio = editor.querySelector('audio');
+			const editorText = editor.querySelector('pre');
+			const editorSearch = editor.querySelector('input[type=text]');
+
+			editorSearch.value = '';
+
+			// https://stackoverflow.com/a/68703218/6917520
+
+			function prefix(words) {
+				// check border cases size 1 array and empty first word)
+				if (!words[0] || words.length ==  1) return words[0] || "";
+				let i = 0;
+				// while all words have the same character at position i, increment i
+				while(words[0][i] && words.every(w => w[i] === words[0][i]))
+					i++;
+				
+				// prefix is the substring from the beginning to the last successfully checked i
+				return words[0].substr(0, i);
+			}
+
+			let epkFiles = [];
+			let selectedFile = 0;
+
+			function selectFile(fileElem) {
+				epkFiles.length = 0;
+				downloadLink.removeAttribute('href');
+				fileElem.disabled = true;
+				if (fileElem.files.length > 0) {
+					const epkFile = fileElem.files[0];
+					const reader = new FileReader();
+					reader.onload = function(e) {
+						progressBar.value = 0;
+						progressBar.max = 1;
+						window.decompileEPK()(e.target.result, function() {
+							progressBar.max++;
+							progressBar.value++;
+						}).then(function(fileList) {
+							if (fileList == null) {
+								alert('Invalid EPK!');
+								fileElem.value = '';
+								progressBar.value = 0;
+								progressBar.max = 1;
+								fileElem.removeAttribute('disabled');
+								return;
+							}
+							fileElem.value = '';
+							progressBar.value = 0;
+							progressBar.max = 1;
+							fileElem.removeAttribute('disabled');
+							epkFiles = fileList;
+							editor.className = '';
+							refreshDropdown();
+							compileBtn.removeAttribute('disabled');
+						});
+					};
+					reader.readAsArrayBuffer(epkFile);
+				} else {
+					fileElem.removeAttribute('disabled');
+				}
+			}
+			
+			function compileIt(fileElem) {
+				compileBtn.disabled = true;
+				fileElem.disabled = true;
+				oldBox.disabled = true;
+				progressBar.value = 0;
+				progressBar.max = epkFiles.length;
+				window.compileEPK()(epkFiles, oldBox.checked, function() {
+					progressBar.value++;
+				}).then(blob => {
+					if (blob == null) {
+						alert('Invalid EPK!');
+						progressBar.value = 0;
+						progressBar.max = 1;
+						oldBox.removeAttribute('disabled');
+						fileElem.removeAttribute('disabled');
+						return;
+					}
+					downloadLink.href = window.URL.createObjectURL(blob);
+					progressBar.value = 0;
+					progressBar.max = 1;
+					oldBox.removeAttribute('disabled');
+					fileElem.removeAttribute('disabled');
+					compileBtn.removeAttribute('disabled');
+				});
+			}
+
+			function filterDropdown(str) {
+				str = str.trim().toLowerCase();
+				const queries = str.split(' ');
+				const opts = [...dropdown.querySelectorAll('option')];
+				let oldValue = dropdown.value;
+				let selectedOne = false;
+				for (const opt of opts) {
+					opt.selected = false;
+					opt.hidden = true;
+					const lowerOptText = opt.text.toLowerCase();
+					if (lowerOptText == str) {
+						if (selectedOne) {
+							selectedOne.selected = false;
+						}
+						selectedOne = opt;
+						opt.selected = true;
+						opt.hidden = false;
+						continue;
+					}
+					for (const query of queries) {
+						if (lowerOptText.includes(query)) {
+							if (!selectedOne) {
+								selectedOne = opt;
+								opt.selected = true;
+							}
+							opt.hidden = false;
+						}
+					}
+				}
+				if (dropdown.value != oldValue) {
+					dropdown.onchange();
+				}
+			}
+
+			dropdown.onchange = function() {
+				selectedFile = dropdown.value;
+				const fileItem = epkFiles[selectedFile];
+				editorName.innerText = fileItem.name;
+				const lowerName = fileItem.name.toLowerCase();
+				if (lowerName.endsWith('.mp3')) {
+					editor.className = 'modea';
+					editorAudio.src = window.URL.createObjectURL(fileItem.data);
+				} else if (lowerName.endsWith('.png')) {
+					editor.className = 'modei';
+					editorImage.src = window.URL.createObjectURL(fileItem.data);
+				} else {
+					editor.className = 'modet';
+					fileItem.data.text().then(t => {
+						editorText.innerText = t;
+					});
+				}
+			};
+
+			function refreshDropdown() {
+				dropdown.innerHTML = '';
+				for (const fileInd in epkFiles) {
+					if (epkFiles[fileInd].type != 'FILE') {
+						continue;
+					}
+					dropdown.add(new Option(epkFiles[fileInd].name, fileInd, false, fileInd == 0));
+				}
+				dropdown.onchange();
+				editorSearch.oninput();
+			}
+
+			function deleteCurrentFile() {
+				epkFiles.splice(selectedFile, 1);
+				refreshDropdown();
+			}
+
+			function createFile(name) {
+				epkFiles.push({
+					type: 'FILE',
+					name: name,
+					data: new Blob([])
+				});
+				refreshDropdown();
+			}
+
+			function changeFile(fileElem) {
+				if (fileElem.files.length > 0) {
+					epkFiles[selectedFile].data = fileElem.files[0];
+					fileElem.value = '';
+					dropdown.onchange();
+				}
+			}
+
+			editorSearch.oninput = function() {
+				filterDropdown(editorSearch.value);
+				if (this.value != '' && epkFiles[this.nextElementSibling.value].name.toLowerCase() != this.value.toLowerCase()) {
+					editorSearch.nextElementSibling.nextElementSibling.removeAttribute('disabled');
+				} else {
+					editorSearch.nextElementSibling.nextElementSibling.disabled = true;
+				}
+			};
+		</script>
+	</body>
+</html>

decompile.html

@@ -59,6 +59,8 @@
 	</head>
 	<body>
 		<sub><a href=".">Want to compile one instead?</a></sub>
+		<br/>
+		<sub><a href="builder.html">Want to create one instead?</a></sub>
 		<h1>ayunWebEPK</h1>
 		<p>Decompile EPK files in your browser!</p>
 		Select .EPK file: <input type="file" onchange="selectFile(this);" accept=".epk"/>
@@ -66,7 +68,7 @@
 		<progress value="0" max="1"></progress>
 		<a download="my-cool.zip">Download as a ZIP!</a>
 		<script>
-			const downloadLink = document.querySelectorAll('a')[1];
+			const downloadLink = document.querySelectorAll('a')[2];
 			const progressBar = document.querySelector('progress');
 
 			function selectFile(fileElem) {
@@ -76,14 +78,23 @@
 					const epkFile = fileElem.files[0];
 					const reader = new FileReader();
 					reader.onload = function(e) {
-						window.decompileEPK()(e.target.result).then(function(fileList) {
+						progressBar.value = 0;
+						progressBar.max = 1;
+						window.decompileEPK()(e.target.result, function() {
+							progressBar.max++;
+							progressBar.value++;
+						}).then(function(fileList) {
 							if (fileList == null) {
-								alert("Invalid EPK!");
+								alert('Invalid EPK!');
+								fileElem.value = '';
+								progressBar.value = 0;
+								progressBar.max = 1;
 								fileElem.removeAttribute('disabled');
 								return;
 							}
 							const zip = new JSZip();
 							progressBar.max = fileList.length;
+							progressBar.value = 0;
 							for (const file of fileList) {
 								progressBar.value++;
 								if (file.type != 'FILE') continue;
@@ -95,7 +106,7 @@
 								fileElem.value = '';
 								progressBar.value = 0;
 								progressBar.max = 1;
-								fileElem.removeAttribute('disabled')
+								fileElem.removeAttribute('disabled');
 							});
 						});
 					};

index.html

@@ -8,6 +8,7 @@
 		<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>
+		<script type="text/javascript" src="ayunEPKCompiler.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"/>
@@ -103,6 +104,8 @@
 	</head>
 	<body>
 		<sub><a href="decompile.html">Want to decompile one instead?</a></sub>
+		<br/>
+		<sub><a href="builder.html">Want to create one instead?</a></sub>
 		<h1>ayunWebEPK</h1>
 		<p>Compile EPK files in your browser!</p>
 		Use legacy format: <input type="checkbox"/>
@@ -116,45 +119,11 @@
 		<progress value="0" max="1"></progress>
 		<a download="my-cool.epk">Download your EPK!</a>
 		<script>
-
+			const downloadLink = document.querySelectorAll('a')[2];
-			// https://stackoverflow.com/a/18639903/6917520
-
-			const crc32 = (function() {
-				let table = new Uint32Array(256);
-
-				for (let i = 256; i--;) {
-					let tmp = i;
-
-					for (let k = 8; k--;) {
-						tmp = tmp & 1 ? 3988292384 ^ tmp >>> 1 : tmp >>> 1;
-					}
-
-					table[i] = tmp;
-				}
-
-				return function(data) {
-					let crc = -1;
-
-					for (let i = 0, l = data.length; i < l; i++) {
-						crc = crc >>> 8 ^ table[crc & 255 ^ data[i]];
-					}
-
-					return (crc ^ -1) >>> 0;
-				};
-			})();
-
-			const downloadLink = document.querySelectorAll('a')[1];
 			const progressBar = document.querySelector('progress');
 			const fileElems = document.querySelectorAll('input[type=file]');
 			const oldBox = document.querySelector('input[type=checkbox]');
 
-			function concatTypedArrays(a, b) {
-				const c = new (a.constructor)(a.length + b.length);
-				c.set(a, 0);
-				c.set(b, a.length);
-				return c;
-			}
-
 			// https://stackoverflow.com/a/68703218/6917520
 
 			function prefix(words) {
@@ -169,50 +138,11 @@
 				return words[0].substr(0, i);
 			}
 
-			const textEncoder = new TextEncoder();
-			function generateLongArray(num) {
-				return Uint8Array.of((num >>> 56) & 0xFF, (num >>> 48) & 0xFF, (num >>> 40) & 0xFF, (num >>> 32) & 0xFF, (num >>> 24) & 0xFF, (num >>> 16) & 0xFF, (num >>> 8) & 0xFF, num & 0xFF);
-			}
-			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));
-			}
-			function generateUTFByte(str) {
-				return concatTypedArrays(Uint8Array.of(str.length), textEncoder.encode(str));
-			}
-			let comment = '# eaglercraft package file - generated with ayunWebEPK by ayunami2000';
-
-			let commentNew = '\n\n # Eagler EPK v2.0 (c) $$YEAR$$ Calder Young\n # generated with ayunWebEPK by ayunami2000';
-
-			let baseEPK = textEncoder.encode('EAGPKG!!');
-
-			baseEPK = concatTypedArrays(baseEPK, generateUTF(comment));
-
-			let baseEPKNew = textEncoder.encode('EAGPKG$$');
-			
-			baseEPKNew = concatTypedArrays(baseEPKNew, generateUTFByte('ver2.0'));
-
-			baseEPKNew = concatTypedArrays(baseEPKNew, generateUTFByte('my-cool.epk'));
-
-			let currentEPK = null;
-
 			function selectFile(fileElem) {
 				downloadLink.removeAttribute('href');
 				fileElems.forEach(elem => elem.disabled = true);
 				oldBox.disabled = true;
-				if (!oldBox.checked) {
+				const fileArr = [];
-					currentEPK = textEncoder.encode('HEAD');
-					currentEPK = concatTypedArrays(currentEPK, generateUTFByte('file-type'));
-					const fileType = 'epk/resources';
-					currentEPK = concatTypedArrays(currentEPK, generateIntArray(fileType.length));
-					currentEPK = concatTypedArrays(currentEPK, textEncoder.encode(fileType));
-					currentEPK = concatTypedArrays(currentEPK, Uint8Array.of(62));
-				}
 				if (fileElem.files.length == 1) {
 					const zipFile = fileElem.files[0];
 					const reader = new FileReader();
@@ -226,15 +156,19 @@
 								if (fileName.endsWith('/')) {
 									progressBar.value = i++;
 									if (i == progressBar.max) {
-										wrapItUp(fileElem);
+										finishIt(fileElem, fileArr, oldBox.checked);
 									}
 									continue;
 								}
-								zip.files[fileName].async('uint8array').then(function(data) {
+								zip.files[fileName].async('blob').then(function(data) {
-									processFile(stripFolder.length == 0 ? fileName : fileName.slice(fileName.indexOf(stripFolder) + stripFolder.length), data);
+									fileArr.push({
+										type: 'FILE',
+										name: stripFolder.length == 0 ? fileName : fileName.slice(fileName.indexOf(stripFolder) + stripFolder.length),
+										data: data
+									});
 									progressBar.value = i++;
 									if (i == progressBar.max) {
-										wrapItUp(fileElem);
+										finishIt(fileElem, fileArr, oldBox.checked);
 									}
 								});
 							}
@@ -247,63 +181,35 @@
 					let i = 0;
 					for (let file of fileElem.files) {
 						const fileName = file.webkitRelativePath;
-						const reader = new FileReader();
+						fileArr.push({
-						reader.onload = function(e) {
+							type: 'FILE',
-							processFile(stripFolder.length == 0 ? fileName : fileName.slice(fileName.indexOf(stripFolder) + stripFolder.length), new Uint8Array(e.target.result));
+							name: stripFolder.length == 0 ? fileName : fileName.slice(fileName.indexOf(stripFolder) + stripFolder.length),
-							progressBar.value = i++;
+							data: file
-							if (i == progressBar.max) {
+						});
-								wrapItUp(fileElem);
+						progressBar.value = i++;
-							}
+						if (i == progressBar.max) {
-						};
+							finishIt(fileElem, fileArr, oldBox.checked);
-						reader.readAsArrayBuffer(file);
+						}
 					}
 				} else {
-					currentEPK = null;
 					fileElems.forEach(elem => elem.removeAttribute('disabled'));
 					oldBox.removeAttribute('disabled');
 				}
 			}
 			
-			function processFile(name, file) {
+			function finishIt(fileElem, fileArr, old) {
-				if (oldBox.checked) {
-					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.byteLength));
-					currentEPK = concatTypedArrays(currentEPK, file);
-					currentEPK = concatTypedArrays(currentEPK, generateUTF('</file>'));
-				} else {
-					currentEPK = concatTypedArrays(currentEPK, textEncoder.encode('FILE'));
-					currentEPK = concatTypedArrays(currentEPK, generateUTFByte(name));
-					currentEPK = concatTypedArrays(currentEPK, generateIntArray(file.byteLength + 5));
-					currentEPK = concatTypedArrays(currentEPK, generateIntArray(crc32(file)));
-					currentEPK = concatTypedArrays(currentEPK, file);
-					currentEPK = concatTypedArrays(currentEPK, textEncoder.encode(':>'));
-				}
-			}
-			
-			function wrapItUp(fileElem) {
-				if (oldBox.checked) {
-					currentEPK = concatTypedArrays(currentEPK, generateUTF(' end'));
-					currentEPK = concatTypedArrays(baseEPK, new Uint8Array(pako.deflate(currentEPK, { level: 9 })));
-				} else {
-					let currBaseEPK = baseEPKNew;
-					currBaseEPK = concatTypedArrays(currBaseEPK, generateUTF(commentNew.replace('$$YEAR$$', new Date().getFullYear())));
-					currBaseEPK = concatTypedArrays(currBaseEPK, generateLongArray(Date.now()));
-					currBaseEPK = concatTypedArrays(currBaseEPK, generateIntArray(progressBar.max + 1));
-					currBaseEPK = concatTypedArrays(currBaseEPK, Uint8Array.of(90));
-					currentEPK = concatTypedArrays(currentEPK, textEncoder.encode('END$'));
-					currentEPK = concatTypedArrays(currBaseEPK, new Uint8Array(pako.deflate(currentEPK, { level: 9 })));
-					currentEPK = concatTypedArrays(currentEPK, textEncoder.encode(':::YEE:>'));
-				}
-				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;
+				window.compileEPK()(fileArr, old, function() {
-				fileElems.forEach(elem => elem.removeAttribute('disabled'));
+					progressBar.value++;
-				oldBox.removeAttribute('disabled');
+				}).then(blob => {
+					downloadLink.href = window.URL.createObjectURL(blob);
+					currentEPK = null;
+					fileElem.value = '';
+					progressBar.value = 0;
+					progressBar.max = 1;
+					fileElems.forEach(elem => elem.removeAttribute('disabled'));
+					oldBox.removeAttribute('disabled');
+				});
 			}
 		</script>
 	</body>