Add OpenTok Archive layout options. (#20218)

* Add OpenTok Archive layout options.

* Fix styesheet type.

types/opentok/index.d.ts

@@ -33,6 +33,18 @@ declare module 'opentok' {
       hasAudio?: boolean;
       hasVideo?: boolean;
       outputMode?: OutputMode;
+      layout?: ArchiveLayoutOptions;
+    }
+
+    export type ArchiveLayoutOptions = PredefinedArchiveLayoutOptions | CustomArchiveLayoutOptions;
+
+    export interface PredefinedArchiveLayoutOptions {
+      type: 'bestFit' | 'pip' | 'verticalPresentation' | 'horizontalPresentation';
+    }
+
+    export interface CustomArchiveLayoutOptions {
+      type: 'custom';
+      stylesheet: string;
     }
 
     export type MediaMode = 'relayed' | 'routed';

types/opentok/opentok-tests.ts

@@ -28,6 +28,21 @@ const archiveOptions: OpenTok.ArchiveOptions = {
   outputMode: 'individual',
 };
 
+const archiveCustomLayoutOptions: OpenTok.ArchiveOptions = {
+  outputMode: 'composed',
+  layout: {
+    type: 'custom',
+    stylesheet: 'derp',
+  }
+};
+
+const archivePredefinedLayoutOptions: OpenTok.ArchiveOptions = {
+  outputMode: 'composed',
+  layout: {
+    type: 'pip',
+  }
+};
+
 client.startArchive('SESSION_ID', archiveOptions, (err: Error, archive: OpenTok.Archive) => {
   if (err) return console.log(err);
   console.log(archive.id);