refactor: switch to typescript

Author: jonasgloning

lib/binarypack.js renamed to lib/binarypack.ts

@@ -1,4 +1,4 @@
-import { BufferBuilder, binaryFeatures } from "./bufferbuilder";
+import { BufferBuilder } from "./bufferbuilder";
 
 export function unpack(data) {
 	const unpacker = new Unpacker(data);
@@ -7,13 +7,16 @@ export function unpack(data) {
 export function pack(data) {
 	const packer = new Packer();
 	packer.pack(data);
-	const buffer = packer.getBuffer();
-	return buffer;
+	return packer.getBuffer();
 }
 
 export default { pack, unpack };
 
 class Unpacker {
+	private index: number;
+	private readonly dataBuffer: any;
+	private readonly dataView: Uint8Array;
+	private readonly length: number;
 	constructor(data) {
 		// Data is ArrayBuffer
 		this.index = 0;
@@ -234,8 +237,7 @@ class Unpacker {
 		const map = {};
 		for (let i = 0; i < size; i++) {
 			const key = this.unpack();
-			const value = this.unpack();
-			map[key] = value;
+			map[key] = this.unpack();
 		}
 		return map;
 	}
@@ -269,6 +271,7 @@ class Unpacker {
 }
 
 class Packer {
+	private bufferBuilder: BufferBuilder;
 	constructor() {
 		this.bufferBuilder = new BufferBuilder();
 	}
@@ -310,17 +313,9 @@ class Packer {
 				) {
 					this.pack_bin(value);
 				} else if (constructor == ArrayBuffer) {
-					if (binaryFeatures.useArrayBufferView) {
-						this.pack_bin(new Uint8Array(value));
-					} else {
-						this.pack_bin(value);
-					}
+					this.pack_bin(new Uint8Array(value));
 				} else if ("BYTES_PER_ELEMENT" in value) {
-					if (binaryFeatures.useArrayBufferView) {
-						this.pack_bin(new Uint8Array(value.buffer));
-					} else {
-						this.pack_bin(value.buffer);
-					}
+					this.pack_bin(new Uint8Array(value.buffer));
 				} else if (
 					constructor == Object ||
 					constructor.toString().startsWith("class")

lib/bufferbuilder.js

@@ -0,0 +1,32 @@
+class BufferBuilder {
+	private _pieces: any[];
+	private readonly _parts: any[];
+	constructor() {
+		this._pieces = [];
+		this._parts = [];
+	}
+
+	append(data) {
+		if (typeof data === "number") {
+			this._pieces.push(data);
+		} else {
+			this.flush();
+			this._parts.push(data);
+		}
+	}
+
+	flush() {
+		if (this._pieces.length > 0) {
+			let buf = new Uint8Array(this._pieces);
+			this._parts.push(buf);
+			this._pieces = [];
+		}
+	}
+
+	getBuffer() {
+		this.flush();
+		return new Blob(this._parts);
+	}
+}
+
+export { BufferBuilder };

lib/bufferbuilder.ts

@@ -5,7 +5,7 @@
 	"homepage": "https://github.com/peers/js-binarypack",
 	"main": "dist/binarypack.js",
 	"module": "dist/module.mjs",
-	"source": "lib/binarypack.js",
+	"source": "lib/binarypack.ts",
 	"scripts": {
 		"watch": "parcel watch",
 		"build": "parcel build",
@@ -39,6 +39,7 @@
 		"jest-environment-jsdom": "^29.4.3",
 		"parcel": "^2.8.3",
 		"prettier": "^2.8.4",
+		"typescript": "^4.9.5",
 		"uglifyjs": "^2.4.11"
 	},
 	"license": "BSD",