✨ feat: Add streaming support (#125)

This adds:
- [x] Keyboard and mouse handling on the frontend
- [x] Video and audio streaming from the backend to the frontend
- [x] Input server that works with Websockets

Update - 17/11
- [ ] Master docker container to run this
- [ ] Steam runtime
- [ ] Entrypoint.sh

---------

Co-authored-by: Kristian Ollikainen <14197772+DatCaptainHorse@users.noreply.github.com>
Co-authored-by: Kristian Ollikainen <DatCaptainHorse@users.noreply.github.com>

packages/input/src/messages.ts

@@ -0,0 +1,73 @@
+import {gzip, ungzip} from "pako";
+import {LatencyTracker} from "./latency";
+
+export interface MessageBase {
+  payload_type: string;
+}
+
+export interface MessageInput extends MessageBase {
+  payload_type: "input";
+  data: string;
+  latency?: LatencyTracker;
+}
+
+export interface MessageICE extends MessageBase {
+  payload_type: "ice";
+  candidate: RTCIceCandidateInit;
+}
+
+export interface MessageSDP extends MessageBase {
+  payload_type: "sdp";
+  sdp: RTCSessionDescriptionInit;
+}
+
+export enum JoinerType {
+  JoinerNode = 0,
+  JoinerClient = 1,
+}
+
+export interface MessageJoin extends MessageBase {
+  payload_type: "join";
+  joiner_type: JoinerType;
+}
+
+export enum AnswerType {
+  AnswerOffline = 0,
+  AnswerInUse,
+  AnswerOK
+}
+
+export interface MessageAnswer extends MessageBase {
+  payload_type: "answer";
+  answer_type: AnswerType;
+}
+
+function blobToUint8Array(blob: Blob): Promise<Uint8Array> {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader();
+    reader.onloadend = () => {
+      const arrayBuffer = reader.result as ArrayBuffer;
+      resolve(new Uint8Array(arrayBuffer));
+    };
+    reader.onerror = reject;
+    reader.readAsArrayBuffer(blob);
+  });
+}
+
+export function encodeMessage<T>(message: T): Uint8Array {
+  // Convert the message to JSON string
+  const json = JSON.stringify(message);
+  // Compress the JSON string using gzip
+  return gzip(json);
+}
+
+export async function decodeMessage<T>(data: Blob): Promise<T> {
+  // Convert the Blob to Uint8Array
+  const array = await blobToUint8Array(data);
+  // Decompress the gzip data
+  const decompressed = ungzip(array);
+  // Convert the Uint8Array to JSON string
+  const json = new TextDecoder().decode(decompressed);
+  // Parse the JSON string
+  return JSON.parse(json);
+}