Enhance Transcript functionality and Composition track removal

- Implemented a deep copy method in the Transcript class to allow for creating independent copies of transcript instances.
- Added unique identifiers for words in the Transcript model to facilitate better tracking and management.
- Updated the removeTracks method in the Composition class to ensure proper removal of tracks by invoking the removeTrack method for each removed track.

These changes improve the functionality and maintainability of the transcript and composition models.

Author: k9p5

package.json

@@ -1,7 +1,7 @@
 {
   "name": "@diffusionstudio/core",
   "private": false,
-  "version": "1.5.1",
+  "version": "1.6.0",
   "type": "module",
   "description": "Build bleeding edge video processing applications",
   "files": [

src/composition/composition.ts

@@ -268,6 +268,7 @@ export class Composition extends EventEmitterMixin<CompositionEvents, typeof Ser
 	public removeTracks(Track: new (composition: Composition) => Track<Clip>): Track<Clip>[] {
 		const removed = this.tracks.filter((track) => track instanceof Track);
 		this.tracks = this.tracks.filter((track) => !(track instanceof Track));
+		removed.forEach(track => this.removeTrack(track));
 
 		return removed;
 	}

src/models/transcript.spec.ts

@@ -306,4 +306,32 @@ is`
 
 		resetFetch();
 	});
+
+	it('should be able to create a deep copy of the transcript', () => {
+		const transcript = new Transcript([
+			new WordGroup([
+				new Word('Lorem', 0e3, 1e3),
+				new Word('Ipsum', 2e3, 3e3),
+			]),
+			new WordGroup([
+				new Word('is', 4e3, 5e3),
+				new Word('simply', 6e3, 7e3),
+			]),
+		]);
+
+		const copy = transcript.copy();
+
+		expect(copy.id).not.toBe(transcript.id);
+		expect(copy.groups.length).toBe(transcript.groups.length);
+		expect(copy.groups[0].words.length).toBe(transcript.groups[0].words.length);
+		expect(copy.groups[0].words[0].id).not.toBe(transcript.groups[0].words[0].id);
+
+		for (let i = 0; i < transcript.words.length; i++) {
+			expect(copy.words[i].text).toBe(transcript.words[i].text);
+		}
+
+		transcript.groups[0].words[0].text = 'Hello';
+
+		expect(copy.groups[0].words[0].text).not.toBe('Hello');
+	});
 });

src/models/transcript.ts

@@ -149,6 +149,14 @@ export class Transcript implements Serializer {
 		return new Transcript([new WordGroup(words)]);
 	}
 
+	/**
+	 * Create a deep copy of the transcript
+	 * @returns A new Transcript instance
+	 */
+	public copy(): Transcript {
+		return Transcript.fromJSON(this.toJSON());
+	}
+
 	public static fromJSON(data: Captions): Transcript {
 		const transcipt = new Transcript();
 

src/models/transcript.word.ts

@@ -8,6 +8,10 @@
 import { Timestamp } from './timestamp';
 
 export class Word {
+	/**
+	 * A unique identifier for the word
+	 */
+	public id = crypto.randomUUID();
 	/**
 	 * Defines the text to be displayed
 	 */