You can now like

backend/routes/users.js

@@ -9,6 +9,18 @@ router.get("/", function (req, res) {
   });
 });
 
+router.get("/isliked/:movieId/:userId", async function (req, res) {
+  const userId = await req.params["userId"];
+  console.log(userId);
+  const movieId = await req.params["movieId"];
+  const user = await UserModel.findById(userId);
+  const movieOid = await MovieModel.findOne({ id: movieId });
+  const likedMovies = user.liked_movies;
+  const myIndex = likedMovies.indexOf(movieOid._id) + 1;
+  console.log(Boolean(myIndex));
+  res.send(Boolean(myIndex));
+});
+
 router.post("/new", function (req, res) {
   const newUser = new UserModel({
     email: req.body.email,
@@ -39,11 +51,22 @@ router.put("/like", async function (req, res) {
     const movieId = await req.body.movieId;
     const movieOid = await MovieModel.findOne({ id: movieId });
     const user = await UserModel.findById(userId);
-    const likedMovies = user.liked_movies.concat([movieOid._id]);
-    await UserModel.findByIdAndUpdate(userId, {
-      liked_movies: likedMovies,
-    });
-    res.send("Done");
+    const likedMovies = user.liked_movies;
+    const myIndex = likedMovies.indexOf(movieOid._id);
+    if (myIndex == -1) {
+      likedMovies.splice(myIndex, 1);
+      await UserModel.findByIdAndUpdate(userId, {
+        liked_movies: likedMovies.concat([movieOid._id]),
+      });
+      console.log(movieOid.title);
+      console.log(movieOid._id);
+      res.send("Done");
+    } else {
+      console.log(movieOid.title);
+      console.log(movieOid._id);
+      console.log("This movie is already liked");
+      res.send("This movie is already liked");
+    }
   } catch (error) {
     console.log(error);
     res.send("Internal problem");
@@ -64,8 +87,13 @@ router.put("/unlike", async function (req, res) {
         liked_movies: likedMovies,
       });
       res.send("Done");
+      console.log(movieOid.title);
+      console.log(movieOid._id);
     } else {
       res.send("This movie wasn't liked");
+      console.log(movieOid.title);
+      console.log(movieOid._id);
+      console.log("This movie wasn't liked");
     }
   } catch (error) {
     console.log(error);