feat: Implemented Favouriting for a user

Co-Authored-By: Tadios Temesgen <tt2022@ic.ac.uk>

src/routes/+page.server.ts

@@ -8,7 +8,25 @@ export const load: PageServerLoad = async ({ depends, locals: { supabase } }) =>
         .select("*, study_space_images(*), study_space_hours(*)");
     if (err) error(500, "Failed to load study spaces");
 
+    const {
+        data: { session }
+    } = await supabase.auth.getSession();
+
+    // Fetch this user’s favourites
+    let favouriteIds: string[] = [];
+    if (session?.user?.id) {
+        const { data: favs, error: favErr } = await supabase
+            .from("favourite_study_spaces")
+            .select("study_space_id")
+            .eq("user_id", session.user.id);
+        if (!favErr && favs) {
+            favouriteIds = favs.map((f) => f.study_space_id);
+        }
+    }
+
     return {
-        studySpaces
+        studySpaces,
+        session,
+        favouriteIds
     };
 };