refactoring

https: //github.com/misskey-dev/misskey/pull/7901
Co-Authored-By: MeiMei <30769358+mei23@users.noreply.github.com>

packages/backend/src/remote/activitypub/kernel/reject/follow.ts

 import { IRemoteUser } from '@/models/entities/user';
-import reject from '@/services/following/requests/reject';
+import { remoteReject } from '@/services/following/reject';
 import { IFollow } from '../../type';
 import DbResolver from '../../db-resolver';
 import { relayRejected } from '@/services/relay';
+import { Users } from '@/models';
 
 export default async (actor: IRemoteUser, activity: IFollow): Promise<string> => {
 	// ※ activityはこっちから投げたフォローリクエストなので、activity.actorは存在するローカルユーザーである必要がある
@@ -14,7 +15,7 @@ export default async (actor: IRemoteUser, activity: IFollow): Promise<string> =>
 		return `skip: follower not found`;
 	}
 
-	if (follower.host != null) {
+	if (!Users.isLocalUser(follower)) {
 		return `skip: follower is not a local user`;
 	}
 
@@ -24,6 +25,6 @@ export default async (actor: IRemoteUser, activity: IFollow): Promise<string> =>
 		return await relayRejected(match[1]);
 	}
 
-	await reject(actor, follower);
+	await remoteReject(actor, follower);
 	return `ok`;
 };

packages/backend/src/server/api/endpoints/following/requests/reject.ts

 import $ from 'cafy';
 import { ID } from '@/misc/cafy-id';
-import rejectFollowRequest from '@/services/following/requests/reject';
+import { rejectFollowRequest } from '@/services/following/reject';
 import define from '../../../define';
 import { ApiError } from '../../../error';
 import { getUser } from '../../../common/getters';

packages/backend/src/services/following/reject.ts

+import { renderActivity } from '@/remote/activitypub/renderer/index';
+import renderFollow from '@/remote/activitypub/renderer/follow';
+import renderReject from '@/remote/activitypub/renderer/reject';
+import { deliver } from '@/queue/index';
+import { publishMainStream, publishUserEvent } from '@/services/stream';
+import { User, ILocalUser, IRemoteUser } from '@/models/entities/user';
+import { Users, FollowRequests, Followings } from '@/models/index';
+import { decrementFollowing } from './delete';
+
+type Local = ILocalUser | { id: User['id']; host: User['host']; uri: User['host'] };
+type Remote = IRemoteUser;
+type Both = Local | Remote;
+
+/**
+ * API following/request/reject
+ */
+export async function rejectFollowRequest(user: Local, follower: Both) {
+	if (Users.isRemoteUser(follower)) {
+		deliverReject(user, follower);
+	}
+
+	await removeFollowRequest(user, follower);
+
+	if (Users.isLocalUser(follower)) {
+		publishUnfollow(user, follower);
+	}
+}
+
+/**
+ * API following/reject
+ */
+export async function rejectFollow(user: Local, follower: Both) {
+	if (Users.isRemoteUser(follower)) {
+		deliverReject(user, follower);
+	}
+
+	await removeFollow(user, follower);
+
+	if (Users.isLocalUser(follower)) {
+		publishUnfollow(user, follower);
+	}
+}
+
+/**
+ * AP Reject/Follow
+ */
+export async function remoteReject(actor: Remote, follower: Local) {
+	await removeFollowRequest(actor, follower);
+	await removeFollow(actor, follower);
+	publishUnfollow(actor, follower);
+}
+
+/**
+ * Remove follow request record
+ */
+async function removeFollowRequest(followee: Both, follower: Both) {
+	const request = await FollowRequests.findOne({
+		followeeId: followee.id,
+		followerId: follower.id
+	});
+
+	if (!request) return;
+
+	await FollowRequests.delete(request.id);
+}
+
+/**
+ * Remove follow record
+ */
+async function removeFollow(followee: Both, follower: Both) {
+	const following = await Followings.findOne({
+		followeeId: followee.id,
+		followerId: follower.id
+	});
+
+	if (!following) return;
+
+	await Followings.delete(following.id);
+	decrementFollowing(follower, followee);
+}
+
+/**
+ * Deliver Reject to remote
+ */
+async function deliverReject(followee: Local, follower: Remote) {
+	const request = await FollowRequests.findOne({
+		followeeId: followee.id,
+		followerId: follower.id
+	});
+
+	const content = renderActivity(renderReject(renderFollow(follower, followee, request?.requestId || undefined), followee));
+	deliver(followee, content, follower.inbox);
+}
+
+/**
+ * Publish unfollow to local
+ */
+async function publishUnfollow(followee: Both, follower: Local) {
+	const packedFollowee = await Users.pack(followee.id, follower, {
+		detail: true
+	});
+
+	publishUserEvent(follower.id, 'unfollow', packedFollowee);
+	publishMainStream(follower.id, 'unfollow', packedFollowee);
+}

packages/backend/src/services/following/requests/reject.ts

-import { renderActivity } from '@/remote/activitypub/renderer/index';
-import renderFollow from '@/remote/activitypub/renderer/follow';
-import renderReject from '@/remote/activitypub/renderer/reject';
-import { deliver } from '@/queue/index';
-import { publishMainStream, publishUserEvent } from '@/services/stream';
-import { User, ILocalUser } from '@/models/entities/user';
-import { Users, FollowRequests, Followings } from '@/models/index';
-import { decrementFollowing } from '../delete';
-
-export default async function(followee: { id: User['id']; host: User['host']; uri: User['host'] }, follower: User) {
-	if (Users.isRemoteUser(follower) && Users.isLocalUser(followee)) {
-		const request = await FollowRequests.findOne({
-			followeeId: followee.id,
-			followerId: follower.id
-		});
-
-		const content = renderActivity(renderReject(renderFollow(follower, followee, request!.requestId!), followee));
-		deliver(followee, content, follower.inbox);
-	}
-
-	const request = await FollowRequests.findOne({
-		followeeId: followee.id,
-		followerId: follower.id
-	});
-
-	if (request) {
-		await FollowRequests.delete(request.id);
-	} else {
-		const following = await Followings.findOne({
-			followeeId: followee.id,
-			followerId: follower.id
-		});
-
-		if (following) {
-			await Followings.delete(following.id);
-			decrementFollowing(follower, followee);
-		}
-	}
-
-	Users.pack(followee.id, follower, {
-		detail: true
-	}).then(packed => {
-		publishUserEvent(follower.id, 'unfollow', packed);
-		publishMainStream(follower.id, 'unfollow', packed);
-	});
-}