Initial progress

src/bennc.ts

@@ -1,3 +1,17 @@
-export function addNumbers (a: number, b: number): number {
-  return a + b
+import { IMessageEvent } from 'websocket'
+import { IncomingPacket } from './structures/server'
+
+export function connect (url: string): void {
+  const webSocket = new WebSocket(url)
+  webSocket.binaryType = 'arraybuffer'
+  webSocket.onopen = onOpen
+  webSocket.onmessage = onMessage
+}
+
+function onOpen (): void {
+  console.log('Connected!')
+}
+
+function onMessage (event: IMessageEvent): void {
+  console.log(new IncomingPacket(event.data as Buffer))
 }

src/buffer-reader.ts

@@ -0,0 +1,37 @@
+import { ByteLength } from './common'
+
+export class BufferReader {
+  private readonly _data: Buffer
+  private _cursor: number
+
+  constructor (data: Buffer = Buffer.from([])) {
+    this._data = data
+    this._cursor = 0
+  }
+
+  get cursor (): number {
+    return this._cursor
+  }
+
+  set cursor (position: number) {
+    if (position < 0 || position > this._data.length) {
+      throw RangeError(`Cannot seek to ${this.cursor} of ${this._data.length} bytes.`)
+    }
+    this._cursor = position
+  }
+
+  readUInt16 (): number {
+    this.cursor += ByteLength.UInt16
+    return this._data.slice(this.cursor - ByteLength.UInt16, this.cursor).readInt16BE()
+  }
+
+  readUInt32 (): number {
+    this.cursor += ByteLength.UInt32
+    return this._data.slice(this.cursor - ByteLength.UInt32, this.cursor).readInt32BE()
+  }
+
+  readBuffer (len: number): Buffer {
+    this.cursor += len
+    return this._data.slice(this.cursor - len, this.cursor)
+  }
+}

src/common.ts

@@ -0,0 +1,4 @@
+export enum ByteLength {
+  UInt16 = 2,
+  UInt32 = 4
+}

src/index.ts

@@ -0,0 +1 @@
+export { connect } from './bennc'

src/structures/server.ts

@@ -0,0 +1,16 @@
+import { BufferReader } from '../buffer-reader'
+
+export class IncomingPacket extends BufferReader {
+  messageType: number
+  senderId: number
+  length: number
+  data: Buffer
+
+  constructor (data: Buffer) {
+    super()
+    this.messageType = this.readUInt16()
+    this.senderId = this.readUInt32()
+    this.length = this.readUInt16()
+    this.data = this.readBuffer(this.length)
+  }
+}