added 2 new endpoints

src/services/group.js

@@ -29,10 +29,14 @@ class GroupService {
     }
 
     async getByName(name) {
-        let res = (await db.query("SELECT * FROM groups WHERE name = $1", [name]));
+        let res = (await db.query("SELECT id FROM groups WHERE name = $1", [name]));
         if (res.rowCount == 0) throw new customError(`getByName group not found`, responseCodes.responses.groups.name_not_found);
         return res.rows[0];
     }
+
+    async getUsersInGroup(groupId) {
+        return (await db.query("SELECT id FROM users WHERE $1 = ANY(groups)", [groupId])).rows.map((group) => group.id)
+    }
 };
 
 export default new GroupService();

src/services/user.js

@@ -39,6 +39,10 @@ class UserService {
     async changePassword(userId, password) {
         await db.query("UPDATE users SET password = $1 WHERE id = $2", [bcrypt.hashSync(password, 12), userId])
     }
+
+    async getAllGroupsForUser(userId) {
+        return (await db.query("SELECT groups FROM users WHERE id = $1", [userId])).rows[0].groups
+    }
 }
 
 export default new UserService();