Better timeline functionality for recordings.

src/view/media-queries-classifier.ts

@@ -1,5 +1,6 @@
 import { EventMediaQueries, MediaQueries, RecordingMediaQueries } from './media-queries';
 
+export type MediaQueriesType = 'event' | 'recording';
 export class MediaQueriesClassifier {
   public static areEventQueries(
     queries?: MediaQueries | null,
@@ -12,4 +13,12 @@ export class MediaQueriesClassifier {
   ): queries is RecordingMediaQueries {
     return queries instanceof RecordingMediaQueries;
   }
+
+  public static getQueriesType(queries?: MediaQueries | null): MediaQueriesType | null {
+    return this.areEventQueries(queries)
+      ? 'event'
+      : this.areRecordingQueries(queries)
+      ? 'recording'
+      : null;
+  }
 }