Break apart view.ts into multiple files.

src/view/media-classifier.ts

@@ -0,0 +1,53 @@
+import { ModifyInterface } from '../utils/basic.js';
+import { ViewMedia, FrigateEventViewMedia, FrigateRecordingViewMedia } from './media';
+
+export class ViewMediaClassifier {
+  public static isFrigateMedia(
+    media: ViewMedia,
+  ): media is FrigateEventViewMedia | FrigateRecordingViewMedia {
+    return this.isFrigateEvent(media) || this.isFrigateRecording(media);
+  }
+  public static isFrigateEvent(media: ViewMedia): media is FrigateEventViewMedia {
+    return media instanceof FrigateEventViewMedia;
+  }
+  public static isFrigateRecording(
+    media: ViewMedia,
+  ): media is FrigateRecordingViewMedia {
+    return media instanceof FrigateRecordingViewMedia;
+  }
+
+  // Typescript conveniences.
+  public static isMediaWithStartEndTime(media: ViewMedia): media is ModifyInterface<
+    ViewMedia,
+    {
+      getStartTime(): Date;
+      getEndTime(): Date;
+    }
+  > {
+    return !!media.getStartTime() && !!media.getEndTime();
+  }
+  public static isMediaWithStartTime(media: ViewMedia): media is ModifyInterface<
+    ViewMedia,
+    {
+      getStartTime(): Date;
+    }
+  > {
+    return !!media.getStartTime();
+  }
+  public static isMediaWithEndTime(media: ViewMedia): media is ModifyInterface<
+    ViewMedia,
+    {
+      getEndTime(): Date;
+    }
+  > {
+    return !!media.getEndTime();
+  }
+  public static isMediaWithID(media: ViewMedia): media is ModifyInterface<
+    ViewMedia,
+    {
+      getID(): string;
+    }
+  > {
+    return !!media.getID();
+  }
+}