なんかもうめっちゃ変えた

packages/backend/src/core/WebhookService.ts

@@ -0,0 +1,70 @@
+import { Inject, Injectable } from '@nestjs/common';
+import Redis from 'ioredis';
+import { WebhooksRepository } from '@/models/index.js';
+import type { Webhook } from '@/models/entities/Webhook.js';
+import { DI } from '@/di-symbols.js';
+import type { OnApplicationShutdown } from '@nestjs/common';
+
+@Injectable()
+export class WebhookService implements OnApplicationShutdown {
+	#webhooksFetched = false;
+	#webhooks: Webhook[] = [];
+
+	constructor(
+		@Inject(DI.redisSubscriber)
+		private redisSubscriber: Redis.Redis,
+
+		@Inject(DI.webhooksRepository)
+		private webhooksRepository: WebhooksRepository,
+	) {
+		this.onMessage = this.onMessage.bind(this);
+		this.redisSubscriber.on('message', this.onMessage);
+	}
+
+	public async getActiveWebhooks() {
+		if (!this.#webhooksFetched) {
+			this.#webhooks = await this.webhooksRepository.findBy({
+				active: true,
+			});
+			this.#webhooksFetched = true;
+		}
+	
+		return this.#webhooks;
+	}
+
+	private async onMessage(_, data) {
+		const obj = JSON.parse(data);
+
+		if (obj.channel === 'internal') {
+			const { type, body } = obj.message;
+			switch (type) {
+				case 'webhookCreated':
+					if (body.active) {
+						this.#webhooks.push(body);
+					}
+					break;
+				case 'webhookUpdated':
+					if (body.active) {
+						const i = this.#webhooks.findIndex(a => a.id === body.id);
+						if (i > -1) {
+							this.#webhooks[i] = body;
+						} else {
+							this.#webhooks.push(body);
+						}
+					} else {
+						this.#webhooks = this.#webhooks.filter(a => a.id !== body.id);
+					}
+					break;
+				case 'webhookDeleted':
+					this.#webhooks = this.#webhooks.filter(a => a.id !== body.id);
+					break;
+				default:
+					break;
+			}
+		}
+	}
+
+	public onApplicationShutdown(signal?: string | undefined) {
+		this.redisSubscriber.off('message', this.onMessage);
+	}
+}