feat: add UtteranceEnd event to sdk (#234)

* feat: add utteranceend event and enum

* feat: add utteranceend event in latest format

* fix: fix typo on new event

* fix: add missing feature flag to enable

src/lib/enums/LiveTranscriptionEvents.ts

@@ -5,4 +5,5 @@ export enum LiveTranscriptionEvents {
   Metadata = "Metadata", // exact match to data type from API
   Error = "error",
   Warning = "warning",
+  UtteranceEnd = "UtteranceEnd", // exact match to data type from API
 }

src/lib/types/TranscriptionSchema.ts

@@ -188,6 +188,11 @@ interface LiveSchema extends TranscriptionSchema {
    * @see https://developers.deepgram.com/docs/interim-results
    */
   interim_results?: boolean;
+
+  /**
+   * @see https://developers.deepgram.com/docs/understanding-end-of-speech-detection
+   */
+  utterance_end_ms?: number;
 }
 
 export type { TranscriptionSchema, PrerecordedSchema, LiveSchema };

src/lib/types/UtteranceEndEvent.ts

@@ -0,0 +1,5 @@
+export interface UtteranceEndEvent {
+  type: "UtteranceEnd";
+  channel: number[];
+  last_word_end: number;
+}

src/lib/types/index.ts

@@ -47,4 +47,5 @@ export type { SyncAnalyzeResponse } from "./SyncAnalyzeResponse";
 export type { TranscriptionSchema, PrerecordedSchema, LiveSchema } from "./TranscriptionSchema";
 export type { UpdateProjectMemberScopeSchema } from "./UpdateProjectMemberScopeSchema";
 export type { UpdateProjectSchema } from "./UpdateProjectSchema";
+export type { UtteranceEndEvent } from "./UtteranceEndEvent";
 export type { VoidResponse } from "./VoidResponse";

src/packages/LiveClient.ts

@@ -11,6 +11,7 @@ import type {
   LiveMetadataEvent,
   LiveTranscriptionEvent,
   DeepgramClientOptions,
+  UtteranceEndEvent,
 } from "../lib/types";
 
 export class LiveClient extends AbstractWsClient {
@@ -53,6 +54,10 @@ export class LiveClient extends AbstractWsClient {
         if (data.type === LiveTranscriptionEvents.Transcript) {
           this.emit(LiveTranscriptionEvents.Transcript, data as LiveTranscriptionEvent);
         }
+
+        if (data.type === LiveTranscriptionEvents.UtteranceEnd) {
+          this.emit(LiveTranscriptionEvents.UtteranceEnd, data as UtteranceEndEvent);
+        }
       } catch (error) {
         this.emit(LiveTranscriptionEvents.Error, {
           event,