wip

packages/backend/src/core/ChatService.ts

@@ -255,6 +255,11 @@ export class ChatService {
 		await redisPipeline.exec();
 	}
 
+	@bindThis
+	public findMessageById(messageId: MiChatMessage['id']) {
+		return this.chatMessagesRepository.findOneBy({ id: messageId });
+	}
+
 	@bindThis
 	public findMyMessageById(userId: MiUser['id'], messageId: MiChatMessage['id']) {
 		return this.chatMessagesRepository.findOneBy({ id: messageId, fromUserId: userId });

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

@@ -398,6 +398,7 @@ export * as 'users/show' from './endpoints/users/show.js';
 export * as 'users/update-memo' from './endpoints/users/update-memo.js';
 export * as 'chat/messages/create' from './endpoints/chat/messages/create.js';
 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/timeline' from './endpoints/chat/messages/timeline.js';
 export * as 'chat/history' from './endpoints/chat/history.js';
 export * as 'v2/admin/emoji/list' from './endpoints/v2/admin/emoji/list.js';

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

@@ -0,0 +1,63 @@
+/*
+ * 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 { GetterService } from '@/server/api/GetterService.js';
+import { ChatService } from '@/core/ChatService.js';
+import { ChatMessageEntityService } from '@/core/entities/ChatMessageEntityService.js';
+import { ApiError } from '@/server/api/error.js';
+import { RoleService } from '@/core/RoleService.js';
+
+export const meta = {
+	tags: ['chat'],
+
+	requireCredential: true,
+
+	kind: 'read:chat',
+
+	res: {
+		type: 'object',
+		optional: false, nullable: false,
+		ref: 'ChatMessage',
+	},
+
+	errors: {
+		noSuchMessage: {
+			message: 'No such message.',
+			code: 'NO_SUCH_MESSAGE',
+			id: '3710865b-1848-4da9-8d61-cfed15510b93',
+		},
+	},
+} as const;
+
+export const paramDef = {
+	type: 'object',
+	properties: {
+		messageId: { type: 'string', format: 'misskey:id' },
+	},
+	required: ['messageId'],
+} as const;
+
+@Injectable()
+export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
+	constructor(
+		private chatService: ChatService,
+		private roleService: RoleService,
+		private chatMessageEntityService: ChatMessageEntityService,
+	) {
+		super(meta, paramDef, async (ps, me) => {
+			const message = await this.chatService.findMessageById(ps.messageId);
+			if (message == null) {
+				throw new ApiError(meta.errors.noSuchMessage);
+			}
+			if (message.fromUserId !== me.id && message.toUserId !== me.id && !(await this.roleService.isModerator(me))) {
+				throw new ApiError(meta.errors.noSuchMessage);
+			}
+			return this.chatMessageEntityService.pack(message, me);
+		});
+	}
+}