feat: store votes, add endpoint to retrieve results

src/events/events.controller.ts

@@ -44,5 +44,15 @@ export class EventsController {
     if (!answer || !['a', 'b'].includes(answer)) {
       throw new BadRequestException('Invalid answer');
     }
+
+    this.eventsService.addVote(id, answer);
+  }
+
+  @Get(':id/vote/results')
+  getVotes(@Param('id') id: string) {
+    const event = events.find((e) => e.name === id);
+    if (!event) throw new NotFoundException('Event not found');
+
+    return this.eventsService.getVotes(id);
   }
 }

src/events/events.service.ts

@@ -6,13 +6,20 @@ interface Client {
   callback: (data: any) => void;
 }
 
+export interface Vote {
+  event: string;
+  answer: 'a' | 'b';
+  createdAt: Date;
+}
+
 @Injectable()
 export class EventsService {
   private clients: Client[] = [];
   private currentActions: Record<string, any> = events.reduce(
     (acc, event) => ({ ...acc, [event.name]: { action: null } }),
     {},
   );
+  private votes: Vote[] = [];
 
   constructor() {
     events.forEach((event) => this.scheduleNewAction(event.name));
@@ -67,4 +74,12 @@ export class EventsService {
   getCurrentAction(event: string) {
     return this.currentActions[event];
   }
+
+  addVote(event: string, answer: 'a' | 'b') {
+    this.votes.push({ event, answer, createdAt: new Date() });
+  }
+
+  getVotes(event: string) {
+    return this.votes.filter((vote) => vote.event === event);
+  }
 }