backend: Prevent instantiation of utility classes by adding private constructors in helpers

backend/src/helpers/ov-components-adapter.helper.ts

@@ -13,6 +13,10 @@ const enum OpenViduComponentsDataTopic {
 }
 
 export class OpenViduComponentsAdapterHelper {
+	private constructor() {
+		// Prevent instantiation of this utility class
+	}
+
 	static generateRecordingSignal(recordingInfo: MeetRecordingInfo) {
 		const options: SendDataOptions = {
 			destinationSids: [],

backend/src/helpers/recording.helper.ts

@@ -3,6 +3,10 @@ import { MeetRecordingInfo, MeetRecordingOutputMode, MeetRecordingStatus } from
 import { EgressStatus } from '@livekit/protocol';
 
 export class RecordingHelper {
+	private constructor() {
+		// Prevent instantiation of this utility class
+	}
+
 	static toRecordingInfo(egressInfo: EgressInfo): MeetRecordingInfo {
 		const status = RecordingHelper.extractOpenViduStatus(egressInfo.status);
 		const size = RecordingHelper.extractSize(egressInfo);
@@ -140,8 +144,9 @@ export class RecordingHelper {
 	 * @param egressInfo - The EgressInfo object containing the endedAt value.
 	 * @returns The endedAt value converted to milliseconds.
 	 */
-	static extractEndDate(egressInfo: EgressInfo): number {
-		return this.toMilliseconds(Number(egressInfo.endedAt ?? 0));
+	static extractEndDate(egressInfo: EgressInfo): number | undefined {
+		const endDateMs = this.toMilliseconds(Number(egressInfo.endedAt ?? 0));
+		return endDateMs !== 0 ? endDateMs : undefined;
 	}
 
 	/**

backend/src/helpers/room.helper.ts

@@ -4,6 +4,10 @@ import { MEET_NAME_ID } from '../environment.js';
 import { uid } from 'uid/single';
 
 export class OpenViduRoomHelper {
+	private constructor() {
+		// Prevent instantiation of this utility class
+	}
+
 	/**
 	 * Converts an OpenViduMeetRoom object to an OpenViduMeetRoomOptions object.
 	 *