feat: cache homepage featured blogs and notice

app/Helpers/CacheHelper.php

@@ -16,5 +16,7 @@ public static function clearHomePage(?string $course = null): void
 
         Cache::forget('home_page_subjects_hsc');
         Cache::forget('home_page_subjects_ssc');
+        Cache::forget('home_page_featured_blogs');
+        Cache::forget('home_page_notice');
     }
 }

app/Http/Controllers/SubjectController.php

@@ -25,16 +25,20 @@ public function index($course)
                 ->toArray();
         });
 
-        $featuredBlogs = Blog::where('is_featured', true)
-            ->where('is_published', true)
-            ->with('user:id,name,username')
-            ->withCount(['reactions', 'comments'])
-            ->inRandomOrder()
-            ->limit(3)
-            ->get()
-            ->toArray();
+        $featuredBlogs = Cache::remember('home_page_featured_blogs', now()->addDay(), function () {
+            return Blog::where('is_featured', true)
+                ->where('is_published', true)
+                ->with('user:id,name,username')
+                ->withCount(['reactions', 'comments'])
+                ->inRandomOrder()
+                ->limit(3)
+                ->get()
+                ->toArray();
+        });
 
-        $notice = Notice::activeForDisplay()?->toArray();
+        $notice = Cache::rememberForever('home_page_notice', function () {
+            return Notice::activeForDisplay()?->toArray();
+        });
 
         return Inertia::render('Home', [
             'subjects' => $subjects,

app/Observers/NoticeObserver.php

@@ -11,4 +11,9 @@ public function saved(Notice $notice): void
     {
         CacheHelper::clearHomePage();
     }
+
+    public function deleted(Notice $notice): void
+    {
+        CacheHelper::clearHomePage();
+    }
 }

tests/Feature/PublicPagesTest.php

@@ -1,11 +1,50 @@
 <?php
 
+use App\Models\Blog;
+use App\Models\Notice;
+use App\Models\User;
+use Illuminate\Support\Facades\Cache;
+
 test('the homepage loads successfully', function () {
     $response = $this->get('/');
 
     $response->assertStatus(200);
 });
 
+test('featured blogs and notice are cached on homepage', function () {
+    $user = User::factory()->create();
+    $blog = Blog::factory()->create([
+        'user_id' => $user->id,
+        'is_featured' => true,
+        'is_published' => true,
+    ]);
+    $notice = Notice::singleton();
+    $notice->update([
+        'title' => 'Important Notice',
+        'is_active' => true,
+    ]);
+
+    expect(Cache::has('home_page_featured_blogs'))->toBeFalse()
+        ->and(Cache::has('home_page_notice'))->toBeFalse();
+
+    $this->get('/')->assertStatus(200);
+
+    expect(Cache::has('home_page_featured_blogs'))->toBeTrue()
+        ->and(Cache::has('home_page_notice'))->toBeTrue();
+
+    // Cache should be invalidated when notice is updated
+    $notice->update(['title' => 'Updated Notice']);
+    expect(Cache::has('home_page_notice'))->toBeFalse()
+        ->and(Cache::has('home_page_featured_blogs'))->toBeFalse();
+
+    // Re-cache and verify blog change invalidates cache
+    $this->get('/')->assertStatus(200);
+    expect(Cache::has('home_page_featured_blogs'))->toBeTrue();
+
+    $blog->update(['title' => 'Updated Blog Title']);
+    expect(Cache::has('home_page_featured_blogs'))->toBeFalse();
+});
+
 test('the about us page loads successfully', function () {
     $response = $this->get('/about-us');