v12 (#5712)

Co-authored-by: MeiMei <30769358+mei23@users.noreply.github.com>
Co-authored-by: Satsuki Yanagi <17376330+u1-liquid@users.noreply.github.com>

src/server/api/endpoints/federation/following.ts

@@ -0,0 +1,51 @@
+import $ from 'cafy';
+import { ID } from '../../../../misc/cafy-id';
+import define from '../../define';
+import { Followings } from '../../../../models';
+import { makePaginationQuery } from '../../common/make-pagination-query';
+
+export const meta = {
+	tags: ['users'],
+
+	requireCredential: false,
+
+	params: {
+		host: {
+			validator: $.str
+		},
+
+		sinceId: {
+			validator: $.optional.type(ID),
+		},
+
+		untilId: {
+			validator: $.optional.type(ID),
+		},
+
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10
+		},
+	},
+
+	res: {
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
+		items: {
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
+			ref: 'Following',
+		}
+	},
+};
+
+export default define(meta, async (ps, me) => {
+	const query = makePaginationQuery(Followings.createQueryBuilder('following'), ps.sinceId, ps.untilId)
+		.andWhere(`following.followerHost = :host`, { host: ps.host });
+
+	const followings = await query
+		.take(ps.limit!)
+		.getMany();
+
+	return await Followings.packMany(followings, me, { populateFollowee: true });
+});