refactoring

Resolve #7779

packages/backend/src/server/api/endpoints/users/groups/joined.ts

@@ -0,0 +1,36 @@
+import define from '../../../define';
+import { UserGroups, UserGroupJoinings } from '@/models/index';
+import { Not, In } from 'typeorm';
+
+export const meta = {
+	tags: ['groups', 'account'],
+
+	requireCredential: true as const,
+
+	kind: 'read:user-groups',
+
+	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: 'UserGroup',
+		}
+	},
+};
+
+export default define(meta, async (ps, me) => {
+	const ownedGroups = await UserGroups.find({
+		userId: me.id,
+	});
+
+	const joinings = await UserGroupJoinings.find({
+		userId: me.id,
+		...(ownedGroups.length > 0 ? {
+			userGroupId: Not(In(ownedGroups.map(x => x.id)))
+		} : {})
+	});
+
+	return await Promise.all(joinings.map(x => UserGroups.pack(x.userGroupId)));
+});