update legacy apis

src/apis/Channels.ts

@@ -55,7 +55,7 @@ export class Channels {
     this.initialize();
   }
 
-  public async createChannel(name: string, description: string, channelOptions: string[] = []): Promise<Channel> {
+  public async create(name: string, description: string, channelOptions: string[] = []): Promise<Channel> {
     if (!name || name.trim().length === 0) {
       throw new ChannelError('Channel name cannot be empty', 'INVALID_NAME');
     }
@@ -186,13 +186,41 @@ export class Channels {
     return deletedChannel;
   }
 
-  public clearCache(): void {
-    this._channelsByAlias.clear();
+  async getPublishSourceStreamId(channelId: string, retryCount: number = 3): Promise<string | null> {
+    const retryCountRemaining = retryCount || 3;
+    const channelMembers = await this.getMembers(channelId);
+
+    if (channelMembers.length === 0) {
+      if (retryCountRemaining > 0) {
+        return this.getPublishSourceStreamId(channelId, retryCountRemaining - 1);
+      }
+
+      return null;
+    }
+
+    const presenter = channelMembers.find(member => member.role === 'Presenter');
+
+    if (!presenter) {
+      if (retryCountRemaining > 0) {
+        return this.getPublishSourceStreamId(channelId, retryCountRemaining - 1);
+      }
+
+      return null;
+    }
+
+    const publishSourceStreamIdRegExp = /pcast:\/\/.*\/([^?]*)/;
+
+    return presenter.streams[0].uri.match(publishSourceStreamIdRegExp)?.[1] ?? null;
   }
 
-  public getCacheSize(): number {
-    return this._channelsByAlias.size;
-  }
+  // TODO(AZ): Implement this
+  // public async fork(channelId: string): Promise<Channel>
+
+  // TODO(AZ): Implement this
+  // public async killChannel(channelId: string): Promise<Channel>
+
+  // TODO(AZ): Implement this
+  // public async publishViaUrl(mediaUriToPublish: string, token: string): Promise<Channel>
 
   private async initialize(): Promise<void> {
     try {