feat: Add lastEventId

Author: HazAT

packages/hub/src/hub.ts

@@ -19,6 +19,9 @@ export class Hub {
   /** Is a {@link Layer}[] containing the client and scope */
   private readonly stack: Layer[] = [];
 
+  /** Contains the last event id of a captured event.  */
+  private _lastEventId?: string;
+
   /**
    * Creates a new instance of the hub, will push one {@link Layer} into the
    * internal stack on creation.
@@ -169,7 +172,7 @@ export class Hub {
    * @returns The generated eventId.
    */
   public captureException(exception: any, hint?: SentryEventHint): string {
-    const eventId = uuid4();
+    const eventId = (this._lastEventId = uuid4());
     this.invokeClientAsync('captureException', exception, {
       ...hint,
       event_id: eventId,
@@ -186,7 +189,7 @@ export class Hub {
    * @returns The generated eventId.
    */
   public captureMessage(message: string, level?: Severity, hint?: SentryEventHint): string {
-    const eventId = uuid4();
+    const eventId = (this._lastEventId = uuid4());
     this.invokeClientAsync('captureMessage', message, level, {
       ...hint,
       event_id: eventId,
@@ -200,13 +203,20 @@ export class Hub {
    * @param event The event to send to Sentry.
    */
   public captureEvent(event: SentryEvent): string {
-    const eventId = uuid4();
+    const eventId = (this._lastEventId = uuid4());
     this.invokeClientAsync('captureEvent', event, {
       event_id: eventId,
     });
     return eventId;
   }
 
+  /**
+   * @returns The last event id of a captured event.
+   */
+  public lastEventId(): string | undefined {
+    return this._lastEventId;
+  }
+
   /**
    * Records a new breadcrumb which will be attached to future events.
    *

packages/hub/test/lib/hub.test.ts

@@ -271,4 +271,13 @@ describe('Hub', () => {
     hub.captureEvent(event);
     expect(spy.mock.calls[0][2]!.event_id).toBeTruthy();
   });
+
+  test('lastEventId should be the same as last created', () => {
+    const event: SentryEvent = {
+      extra: { b: 3 },
+    };
+    const hub = new Hub();
+    const eventId = hub.captureEvent(event);
+    expect(eventId).toBe(hub.lastEventId());
+  });
 });