特定インスタンスからのフォローを全解除できるように

src/server/api/endpoints/admin/federation/remove-all-following.ts

@@ -0,0 +1,41 @@
+import $ from 'cafy';
+import define from '../../../define';
+import Instance from '../../../../../models/instance';
+import Following from '../../../../../models/following';
+import User from '../../../../../models/user';
+import deleteFollowing from '../../../../../services/following/delete';
+
+export const meta = {
+	requireCredential: true,
+	requireModerator: true,
+
+	params: {
+		host: {
+			validator: $.str
+		}
+	}
+};
+
+export default define(meta, (ps, me) => new Promise(async (res, rej) => {
+	const instance = await Instance
+		.findOne({ host: ps.host });
+
+	if (instance == null) {
+		return rej('instance not found');
+	}
+
+	const followings = await Following.find({
+		'_follower.host': { $ne: null }
+	});
+
+	const pairs = await Promise.all(followings.map(f => Promise.all([
+		User.findOne({ _id: f.followerId }),
+		User.findOne({ _id: f.followeeId })
+	])));
+
+	for (const pair of pairs) {
+		deleteFollowing(pair[0], pair[1]);
+	}
+
+	res();
+}));