strictNullChecks (#4666)

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

src/services/following/requests/accept-all.ts

@@ -1,6 +1,7 @@
 import accept from './accept';
 import { User } from '../../../models/entities/user';
 import { FollowRequests, Users } from '../../../models';
+import { ensure } from '../../../prelude/ensure';
 
 /**
  * 指定したユーザー宛てのフォローリクエストをすべて承認
@@ -12,7 +13,7 @@ export default async function(user: User) {
 	});
 
 	for (const request of requests) {
-		const follower = await Users.findOne(request.followerId);
+		const follower = await Users.findOne(request.followerId).then(ensure);
 		accept(user, follower);
 	}
 }

src/services/following/requests/accept.ts

@@ -16,7 +16,7 @@ export default async function(followee: User, follower: User) {
 	await insertFollowingDoc(followee, follower);
 
 	if (Users.isRemoteUser(follower) && request) {
-		const content = renderActivity(renderAccept(renderFollow(follower, followee, request.requestId), followee as ILocalUser));
+		const content = renderActivity(renderAccept(renderFollow(follower, followee, request.requestId!), followee as ILocalUser));
 		deliver(followee as ILocalUser, content, follower.inbox);
 	}
 

src/services/following/requests/reject.ts

@@ -13,7 +13,7 @@ export default async function(followee: User, follower: User) {
 			followerId: follower.id
 		});
 
-		const content = renderActivity(renderReject(renderFollow(follower, followee, request.requestId), followee as ILocalUser));
+		const content = renderActivity(renderReject(renderFollow(follower, followee, request!.requestId!), followee as ILocalUser));
 		deliver(followee as ILocalUser, content, follower.inbox);
 	}