snapshot of https://github.com/ueberdosis/hocuspocus.git @ cf3cfa355b4d3bb61c6b6c80071f71783e32470e (2026-09-15)

packages/server/src/IncomingMessage.ts

@@ -0,0 +1,80 @@
+import type { Decoder } from "lib0/decoding";
+import {
+	createDecoder,
+	readVarString,
+	readVarUint,
+	readVarUint8Array,
+} from "lib0/decoding";
+import type { Encoder } from "lib0/encoding";
+import {
+	createEncoder,
+	length,
+	toUint8Array,
+	writeVarString,
+	writeVarUint,
+} from "lib0/encoding";
+import type { MessageType } from "./types.ts";
+
+export class IncomingMessage {
+	/**
+	 * Access to the received message.
+	 */
+	decoder: Decoder;
+
+	/**
+	 * Private encoder; can be undefined.
+	 *
+	 * Lazy creation of the encoder speeds up IncomingMessages that need only a decoder.
+	 */
+	private encoderInternal?: Encoder;
+
+	constructor(input: any) {
+		if (!(input instanceof Uint8Array)) {
+			input = new Uint8Array(input);
+		}
+
+		this.decoder = createDecoder(input);
+	}
+
+	get encoder() {
+		if (!this.encoderInternal) {
+			this.encoderInternal = createEncoder();
+		}
+		return this.encoderInternal;
+	}
+
+	readVarUint8Array() {
+		return readVarUint8Array(this.decoder);
+	}
+
+	peekVarUint8Array() {
+		const { pos } = this.decoder;
+		const result = readVarUint8Array(this.decoder);
+		this.decoder.pos = pos;
+		return result;
+	}
+
+	readVarUint() {
+		return readVarUint(this.decoder);
+	}
+
+	readVarString() {
+		return readVarString(this.decoder);
+	}
+
+	toUint8Array() {
+		return toUint8Array(this.encoder);
+	}
+
+	writeVarUint(type: MessageType) {
+		writeVarUint(this.encoder, type);
+	}
+
+	writeVarString(string: string) {
+		writeVarString(this.encoder, string);
+	}
+
+	get length(): number {
+		return length(this.encoder);
+	}
+}