インスタンス運営者がピン留めユーザーを設定できるように

Related #4892

src/server/api/endpoints/pinned-users.ts

@@ -0,0 +1,33 @@
+import define from '../define';
+import { Users } from '../../../models';
+import { types, bool } from '../../../misc/schema';
+import { fetchMeta } from '../../../misc/fetch-meta';
+import parseAcct from '../../../misc/acct/parse';
+import { User } from '../../../models/entities/user';
+
+export const meta = {
+	tags: ['users'],
+
+	requireCredential: false,
+
+	params: {
+	},
+
+	res: {
+		type: types.array,
+		optional: bool.false, nullable: bool.false,
+		items: {
+			type: types.object,
+			optional: bool.false, nullable: bool.false,
+			ref: 'User',
+		}
+	},
+};
+
+export default define(meta, async (ps, me) => {
+	const meta = await fetchMeta();
+
+	const users = await Promise.all(meta.pinnedUsers.map(acct => Users.findOne(parseAcct(acct))));
+
+	return await Users.packMany(users.filter(x => x !== undefined) as User[], me, { detail: true });
+});