Fix TS Observers type

### Details

- Export `WorkerObserver`, `ProducerObserver` types.
- Many changes done because things were wrong at TS level despite it didn't show up (things showed up to me while doing this).

node/src/ActiveSpeakerObserver.ts

@@ -33,6 +33,9 @@ export type ActiveSpeakerObserverEvents = RtpObserverEvents & {
 	dominantspeaker: [ActiveSpeakerObserverDominantSpeaker];
 };
 
+export type ActiveSpeakerObserverObserver =
+	EnhancedEventEmitter<ActiveSpeakerObserverObserverEvents>;
+
 export type ActiveSpeakerObserverObserverEvents = RtpObserverObserverEvents & {
 	dominantspeaker: [ActiveSpeakerObserverDominantSpeaker];
 };
@@ -46,23 +49,29 @@ export class ActiveSpeakerObserver<
 	ActiveSpeakerObserverAppData extends AppData = AppData,
 > extends RtpObserver<
 	ActiveSpeakerObserverAppData,
-	ActiveSpeakerObserverEvents
+	ActiveSpeakerObserverEvents,
+	ActiveSpeakerObserverObserver
 > {
 	/**
 	 * @private
 	 */
 	constructor(
 		options: RtpObserverObserverConstructorOptions<ActiveSpeakerObserverAppData>
 	) {
-		super(options);
+		const observer: ActiveSpeakerObserverObserver =
+			new EnhancedEventEmitter<ActiveSpeakerObserverObserverEvents>();
+
+		super(options, observer);
 
 		this.handleWorkerNotifications();
 	}
 
 	/**
 	 * Observer.
+	 *
+	 * @override
 	 */
-	get observer(): EnhancedEventEmitter<ActiveSpeakerObserverObserverEvents> {
+	get observer(): ActiveSpeakerObserverObserver {
 		return super.observer;
 	}
 

node/src/AudioLevelObserver.ts

@@ -55,6 +55,9 @@ export type AudioLevelObserverEvents = RtpObserverEvents & {
 	silence: [];
 };
 
+export type AudioLevelObserverObserver =
+	EnhancedEventEmitter<AudioLevelObserverObserverEvents>;
+
 export type AudioLevelObserverObserverEvents = RtpObserverObserverEvents & {
 	volumes: [AudioLevelObserverVolume[]];
 	silence: [];
@@ -67,22 +70,31 @@ const logger = new Logger('AudioLevelObserver');
 
 export class AudioLevelObserver<
 	AudioLevelObserverAppData extends AppData = AppData,
-> extends RtpObserver<AudioLevelObserverAppData, AudioLevelObserverEvents> {
+> extends RtpObserver<
+	AudioLevelObserverAppData,
+	AudioLevelObserverEvents,
+	AudioLevelObserverObserver
+> {
 	/**
 	 * @private
 	 */
 	constructor(
 		options: AudioLevelObserverConstructorOptions<AudioLevelObserverAppData>
 	) {
-		super(options);
+		const observer: AudioLevelObserverObserver =
+			new EnhancedEventEmitter<AudioLevelObserverObserverEvents>();
+
+		super(options, observer);
 
 		this.handleWorkerNotifications();
 	}
 
 	/**
 	 * Observer.
+	 *
+	 * @override
 	 */
-	get observer(): EnhancedEventEmitter<AudioLevelObserverObserverEvents> {
+	get observer(): AudioLevelObserverObserver {
 		return super.observer;
 	}
 

node/src/Consumer.ts

@@ -179,6 +179,8 @@ export type ConsumerEvents = {
 	'@producerclose': [];
 };
 
+export type ConsumerObserver = EnhancedEventEmitter<ConsumerObserverEvents>;
+
 export type ConsumerObserverEvents = {
 	close: [];
 	pause: [];
@@ -318,7 +320,8 @@ export class Consumer<
 	#currentLayers?: ConsumerLayers;
 
 	// Observer instance.
-	readonly #observer = new EnhancedEventEmitter<ConsumerObserverEvents>();
+	readonly #observer: ConsumerObserver =
+		new EnhancedEventEmitter<ConsumerObserverEvents>();
 
 	/**
 	 * @private
@@ -459,7 +462,7 @@ export class Consumer<
 	/**
 	 * Observer.
 	 */
-	get observer(): EnhancedEventEmitter<ConsumerObserverEvents> {
+	get observer(): ConsumerObserver {
 		return this.#observer;
 	}
 

node/src/DataConsumer.ts

@@ -92,6 +92,9 @@ export type DataConsumerEvents = {
 	'@dataproducerclose': [];
 };
 
+export type DataConsumerObserver =
+	EnhancedEventEmitter<DataConsumerObserverEvents>;
+
 export type DataConsumerObserverEvents = {
 	close: [];
 	pause: [];
@@ -148,7 +151,8 @@ export class DataConsumer<
 	#appData: DataConsumerAppData;
 
 	// Observer instance.
-	readonly #observer = new EnhancedEventEmitter<DataConsumerObserverEvents>();
+	readonly #observer: DataConsumerObserver =
+		new EnhancedEventEmitter<DataConsumerObserverEvents>();
 
 	/**
 	 * @private
@@ -272,7 +276,7 @@ export class DataConsumer<
 	/**
 	 * Observer.
 	 */
-	get observer(): EnhancedEventEmitter<DataConsumerObserverEvents> {
+	get observer(): DataConsumerObserver {
 		return this.#observer;
 	}
 

node/src/DataProducer.ts

@@ -67,6 +67,9 @@ export type DataProducerEvents = {
 	'@close': [];
 };
 
+export type DataProducerObserver =
+	EnhancedEventEmitter<DataProducerObserverEvents>;
+
 export type DataProducerObserverEvents = {
 	close: [];
 	pause: [];
@@ -113,7 +116,8 @@ export class DataProducer<
 	#appData: DataProducerAppData;
 
 	// Observer instance.
-	readonly #observer = new EnhancedEventEmitter<DataProducerObserverEvents>();
+	readonly #observer: DataProducerObserver =
+		new EnhancedEventEmitter<DataProducerObserverEvents>();
 
 	/**
 	 * @private
@@ -210,7 +214,7 @@ export class DataProducer<
 	/**
 	 * Observer.
 	 */
-	get observer(): EnhancedEventEmitter<DataProducerObserverEvents> {
+	get observer(): DataProducerObserver {
 		return this.#observer;
 	}
 

node/src/DirectTransport.ts

@@ -1,4 +1,5 @@
 import { Logger } from './Logger';
+import { EnhancedEventEmitter } from './enhancedEvents';
 import { UnsupportedError } from './errors';
 import {
 	BaseTransportDump,
@@ -44,6 +45,9 @@ export type DirectTransportEvents = TransportEvents & {
 	rtcp: [Buffer];
 };
 
+export type DirectTransportObserver =
+	EnhancedEventEmitter<DirectTransportObserverEvents>;
+
 export type DirectTransportObserverEvents = TransportObserverEvents & {
 	rtcp: [Buffer];
 };
@@ -64,7 +68,7 @@ export class DirectTransport<
 > extends Transport<
 	DirectTransportAppData,
 	DirectTransportEvents,
-	DirectTransportObserverEvents
+	DirectTransportObserver
 > {
 	// DirectTransport data.
 	readonly #data: DirectTransportData;
@@ -75,7 +79,10 @@ export class DirectTransport<
 	constructor(
 		options: DirectTransportConstructorOptions<DirectTransportAppData>
 	) {
-		super(options);
+		const observer: DirectTransportObserver =
+			new EnhancedEventEmitter<DirectTransportObserverEvents>();
+
+		super(options, observer);
 
 		logger.debug('constructor()');
 
@@ -86,6 +93,15 @@ export class DirectTransport<
 		this.handleWorkerNotifications();
 	}
 
+	/**
+	 * Observer.
+	 *
+	 * @override
+	 */
+	get observer(): DirectTransportObserver {
+		return super.observer;
+	}
+
 	/**
 	 * Close the DirectTransport.
 	 *

node/src/PipeTransport.ts

@@ -1,5 +1,6 @@
 import * as flatbuffers from 'flatbuffers';
 import { Logger } from './Logger';
+import { EnhancedEventEmitter } from './enhancedEvents';
 import * as ortc from './ortc';
 import {
 	BaseTransportDump,
@@ -131,6 +132,9 @@ export type PipeTransportEvents = TransportEvents & {
 	sctpstatechange: [SctpState];
 };
 
+export type PipeTransportObserver =
+	EnhancedEventEmitter<PipeTransportObserverEvents>;
+
 export type PipeTransportObserverEvents = TransportObserverEvents & {
 	sctpstatechange: [SctpState];
 };
@@ -161,7 +165,7 @@ export class PipeTransport<
 > extends Transport<
 	PipeTransportAppData,
 	PipeTransportEvents,
-	PipeTransportObserverEvents
+	PipeTransportObserver
 > {
 	// PipeTransport data.
 	readonly #data: PipeTransportData;
@@ -170,7 +174,10 @@ export class PipeTransport<
 	 * @private
 	 */
 	constructor(options: PipeTransportConstructorOptions<PipeTransportAppData>) {
-		super(options);
+		const observer: PipeTransportObserver =
+			new EnhancedEventEmitter<PipeTransportObserverEvents>();
+
+		super(options, observer);
 
 		logger.debug('constructor()');
 
@@ -187,6 +194,15 @@ export class PipeTransport<
 		this.handleWorkerNotifications();
 	}
 
+	/**
+	 * Observer.
+	 *
+	 * @override
+	 */
+	get observer(): PipeTransportObserver {
+		return super.observer;
+	}
+
 	/**
 	 * Transport tuple.
 	 */

node/src/PlainTransport.ts

@@ -1,5 +1,6 @@
 import * as flatbuffers from 'flatbuffers';
 import { Logger } from './Logger';
+import { EnhancedEventEmitter } from './enhancedEvents';
 import {
 	parseSctpState,
 	BaseTransportDump,
@@ -130,6 +131,9 @@ export type PlainTransportEvents = TransportEvents & {
 	sctpstatechange: [SctpState];
 };
 
+export type PlainTransportObserver =
+	EnhancedEventEmitter<PlainTransportObserverEvents>;
+
 export type PlainTransportObserverEvents = TransportObserverEvents & {
 	tuple: [TransportTuple];
 	rtcptuple: [TransportTuple];
@@ -166,7 +170,7 @@ export class PlainTransport<
 > extends Transport<
 	PlainTransportAppData,
 	PlainTransportEvents,
-	PlainTransportObserverEvents
+	PlainTransportObserver
 > {
 	// PlainTransport data.
 	readonly #data: PlainTransportData;
@@ -177,7 +181,10 @@ export class PlainTransport<
 	constructor(
 		options: PlainTransportConstructorOptions<PlainTransportAppData>
 	) {
-		super(options);
+		const observer: PlainTransportObserver =
+			new EnhancedEventEmitter<PlainTransportObserverEvents>();
+
+		super(options, observer);
 
 		logger.debug('constructor()');
 
@@ -196,6 +203,15 @@ export class PlainTransport<
 		this.handleWorkerNotifications();
 	}
 
+	/**
+	 * Observer.
+	 *
+	 * @override
+	 */
+	get observer(): PlainTransportObserver {
+		return super.observer;
+	}
+
 	/**
 	 * Transport tuple.
 	 */

node/src/Producer.ts

@@ -140,6 +140,8 @@ export type ProducerEvents = {
 	'@close': [];
 };
 
+export type ProducerObserver = EnhancedEventEmitter<ProducerObserverEvents>;
+
 export type ProducerObserverEvents = {
 	close: [];
 	pause: [];
@@ -198,7 +200,8 @@ export class Producer<
 	#score: ProducerScore[] = [];
 
 	// Observer instance.
-	readonly #observer = new EnhancedEventEmitter<ProducerObserverEvents>();
+	readonly #observer: ProducerObserver =
+		new EnhancedEventEmitter<ProducerObserverEvents>();
 
 	/**
 	 * @private
@@ -304,7 +307,7 @@ export class Producer<
 	/**
 	 * Observer.
 	 */
-	get observer(): EnhancedEventEmitter<ProducerObserverEvents> {
+	get observer(): ProducerObserver {
 		return this.#observer;
 	}
 

node/src/Router.ts

@@ -198,6 +198,8 @@ export type RouterEvents = {
 	'@close': [];
 };
 
+export type RouterObserver = EnhancedEventEmitter<RouterObserverEvents>;
+
 export type RouterObserverEvents = {
 	close: [];
 	newtransport: [Transport];
@@ -252,7 +254,8 @@ export class Router<
 	> = new Map();
 
 	// Observer instance.
-	readonly #observer = new EnhancedEventEmitter<RouterObserverEvents>();
+	readonly #observer: RouterObserver =
+		new EnhancedEventEmitter<RouterObserverEvents>();
 
 	/**
 	 * @private
@@ -316,7 +319,7 @@ export class Router<
 	/**
 	 * Observer.
 	 */
-	get observer(): EnhancedEventEmitter<RouterObserverEvents> {
+	get observer(): RouterObserver {
 		return this.#observer;
 	}