fix: stop showing timers as pending after workflow cancellation

src/lib/models/event-groups/create-event-group.ts

@@ -81,6 +81,7 @@ const createGroupFor = <K extends keyof StartingEvents>(
     level: undefined,
     pendingActivity: undefined,
     pendingNexusOperation: undefined,
+    cancelRequested: false,
     userMetadata: event?.userMetadata,
     get eventTime() {
       return this.lastEvent?.eventTime;
@@ -105,7 +106,8 @@ const createGroupFor = <K extends keyof StartingEvents>(
         !!this.pendingActivity ||
         !!this.pendingNexusOperation ||
         (isTimerStartedEvent(this.initialEvent) &&
-          this.eventList.length === 1) ||
+          this.eventList.length === 1 &&
+          !this.cancelRequested) ||
         (isStartChildWorkflowExecutionInitiatedEvent(this.initialEvent) &&
           this.eventList.length === 2)
       );
@@ -114,7 +116,12 @@ const createGroupFor = <K extends keyof StartingEvents>(
       return Boolean(this.eventList.find(eventIsFailureOrTimedOut));
     },
     get isCanceled() {
-      return Boolean(this.eventList.find(eventIsCanceled));
+      return (
+        Boolean(this.eventList.find(eventIsCanceled)) ||
+        (isTimerStartedEvent(this.initialEvent) &&
+          this.eventList.length === 1 &&
+          this.cancelRequested)
+      );
     },
     get isTerminated() {
       return Boolean(this.eventList.find(eventIsTerminated));

src/lib/models/event-groups/event-groups.d.ts

@@ -30,6 +30,7 @@ interface EventGroup extends Pick<
   level: number | undefined;
   pendingActivity: PendingActivity | undefined;
   pendingNexusOperation: PendingNexusOperation | undefined;
+  cancelRequested: boolean;
   userMetadata?: { summary?: Payload };
   decodedLocalActivity?: SummaryAttribute;
   links: EventLink[];

src/lib/models/event-groups/index.ts

@@ -10,6 +10,8 @@ import {
   isNexusOperationCanceledEvent,
   isNexusOperationCompletedEvent,
   isNexusOperationFailedEvent,
+  isTimerStartedEvent,
+  isWorkflowExecutionCancelRequestedEvent,
   isNexusOperationTimedOutEvent,
 } from '$lib/utilities/is-event-type';
 import {
@@ -106,6 +108,21 @@ export const groupEvents = (
     }
   }
 
+  const cancelRequestedEvent = events.find(
+    isWorkflowExecutionCancelRequestedEvent,
+  );
+
+  if (cancelRequestedEvent) {
+    for (const group of Object.values(groups)) {
+      if (
+        isTimerStartedEvent(group.initialEvent) &&
+        group.eventList.length === 1
+      ) {
+        group.cancelRequested = true;
+      }
+    }
+  }
+
   return sort === 'descending'
     ? Object.values(groups).reverse()
     : Object.values(groups);