enhance: exploreで公開ロール一覧とそのメンバーを閲覧できるように

packages/backend/src/server/api/endpoints/roles/show.ts

@@ -0,0 +1,52 @@
+import { Inject, Injectable } from '@nestjs/common';
+import type { RolesRepository } from '@/models/index.js';
+import { Endpoint } from '@/server/api/endpoint-base.js';
+import { DI } from '@/di-symbols.js';
+import { RoleEntityService } from '@/core/entities/RoleEntityService.js';
+import { ApiError } from '../../error.js';
+
+export const meta = {
+	tags: ['role', 'users'],
+
+	requireCredential: false,
+
+	errors: {
+		noSuchRole: {
+			message: 'No such role.',
+			code: 'NO_SUCH_ROLE',
+			id: 'de5502bf-009a-4639-86c1-fec349e46dcb',
+		},
+	},
+} as const;
+
+export const paramDef = {
+	type: 'object',
+	properties: {
+		roleId: { type: 'string', format: 'misskey:id' },
+	},
+	required: ['roleId'],
+} as const;
+
+// eslint-disable-next-line import/no-default-export
+@Injectable()
+export default class extends Endpoint<typeof meta, typeof paramDef> {
+	constructor(
+		@Inject(DI.rolesRepository)
+		private rolesRepository: RolesRepository,
+
+		private roleEntityService: RoleEntityService,
+	) {
+		super(meta, paramDef, async (ps, me) => {
+			const role = await this.rolesRepository.findOneBy({
+				id: ps.roleId,
+				isPublic: true,
+			});
+
+			if (role == null) {
+				throw new ApiError(meta.errors.noSuchRole);
+			}
+
+			return await this.roleEntityService.pack(role, me);
+		});
+	}
+}