From 3e200c0f66751954724e7615e303bf0435b38066 Mon Sep 17 00:00:00 2001
From: syuilo <4439005+syuilo@users.noreply.github.com>
Date: Sat, 22 Mar 2025 10:30:18 +0900
Subject: [PATCH] wip

---
 packages/backend/src/core/ChatService.ts          |  9 ++++++++-
 packages/backend/src/core/UserFollowingService.ts | 10 ++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/packages/backend/src/core/ChatService.ts b/packages/backend/src/core/ChatService.ts
index f5b9cf7e8d..37288b75fe 100644
--- a/packages/backend/src/core/ChatService.ts
+++ b/packages/backend/src/core/ChatService.ts
@@ -67,8 +67,15 @@ export class ChatService {
 		if (toUser.chatScope === 'none') {
 			throw new Error('recipient is cannot chat');
 		} else if (toUser.chatScope === 'followers') {
-
+			const isFollower = await this.userFollowingService.isFollowing(fromUser.id, toUser.id);
+			if (!isFollower) {
+				throw new Error('recipient is cannot chat');
+			}
 		} else if (toUser.chatScope === 'following') {
+			const isFollowing = await this.userFollowingService.isFollowing(toUser.id, fromUser.id);
+			if (!isFollowing) {
+				throw new Error('recipient is cannot chat');
+			}
 		} else if (toUser.chatScope === 'mutual') {
 			const isMutual = await this.userFollowingService.isMutual(fromUser.id, toUser.id);
 			if (!isMutual) {
diff --git a/packages/backend/src/core/UserFollowingService.ts b/packages/backend/src/core/UserFollowingService.ts
index aac340f079..e7a6be99fb 100644
--- a/packages/backend/src/core/UserFollowingService.ts
+++ b/packages/backend/src/core/UserFollowingService.ts
@@ -737,6 +737,16 @@ export class UserFollowingService implements OnModuleInit {
 			.getMany();
 	}
 
+	@bindThis
+	public isFollowing(followerId: MiUser['id'], followeeId: MiUser['id']) {
+		return this.followingsRepository.exists({
+			where: {
+				followerId,
+				followeeId,
+			},
+		});
+	}
+
 	@bindThis
 	public async isMutual(aUserId: MiUser['id'], bUserId: MiUser['id']) {
 		const count = await this.followingsRepository.createQueryBuilder('following')