enhance: チャットのリアクションを削除できるように

packages/backend/src/server/api/endpoint-list.ts

@@ -401,6 +401,7 @@ export * as 'chat/messages/create-to-room' from './endpoints/chat/messages/creat
 export * as 'chat/messages/delete' from './endpoints/chat/messages/delete.js';
 export * as 'chat/messages/show' from './endpoints/chat/messages/show.js';
 export * as 'chat/messages/react' from './endpoints/chat/messages/react.js';
+export * as 'chat/messages/unreact' from './endpoints/chat/messages/unreact.js';
 export * as 'chat/messages/user-timeline' from './endpoints/chat/messages/user-timeline.js';
 export * as 'chat/messages/room-timeline' from './endpoints/chat/messages/room-timeline.js';
 export * as 'chat/messages/search' from './endpoints/chat/messages/search.js';

packages/backend/src/server/api/endpoints/chat/messages/unreact.ts

@@ -0,0 +1,49 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Inject, Injectable } from '@nestjs/common';
+import { Endpoint } from '@/server/api/endpoint-base.js';
+import { DI } from '@/di-symbols.js';
+import { ChatService } from '@/core/ChatService.js';
+import { ApiError } from '@/server/api/error.js';
+
+export const meta = {
+	tags: ['chat'],
+
+	requireCredential: true,
+
+	kind: 'write:chat',
+
+	res: {
+	},
+
+	errors: {
+		noSuchMessage: {
+			message: 'No such message.',
+			code: 'NO_SUCH_MESSAGE',
+			id: 'c39ea42f-e3ca-428a-ad57-390e0a711595',
+		},
+	},
+} as const;
+
+export const paramDef = {
+	type: 'object',
+	properties: {
+		messageId: { type: 'string', format: 'misskey:id' },
+		reaction: { type: 'string' },
+	},
+	required: ['messageId', 'reaction'],
+} as const;
+
+@Injectable()
+export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
+	constructor(
+		private chatService: ChatService,
+	) {
+		super(meta, paramDef, async (ps, me) => {
+			await this.chatService.unreact(ps.messageId, me.id, ps.reaction);
+		});
+	}
+}