favorites

app/Models/Exercise.php

@@ -39,4 +39,9 @@ class Exercise extends Model
     {
         return $this->hasMany(WorkoutExercise::class);
     }
+
+    public function favoritedBy()
+    {
+        return $this->belongsToMany(User::class, 'exercise_favorites')->withTimestamps();
+    }
 }

app/Models/User.php

@@ -51,4 +51,25 @@ class User extends Authenticatable
     {
         return $this->hasMany(Workout::class);
     }
+
+    public function favoriteExercises()
+    {
+        return $this->belongsToMany(Exercise::class, 'exercise_favorites')->withTimestamps();
+    }
+
+    public function favoriteWorkouts()
+    {
+        return $this->belongsToMany(Workout::class, 'workout_favorites')->withTimestamps();
+    }
+
+    // Helpers
+    public function hasFavoritedExercise(Exercise $exercise): bool
+    {
+        return $this->favoriteExercises()->where('exercise_id', $exercise->id)->exists();
+    }
+
+    public function hasFavoritedWorkout(Workout $workout): bool
+    {
+        return $this->favoriteWorkouts()->where('workout_id', $workout->id)->exists();
+    }
 }

app/Models/Workout.php

@@ -40,4 +40,9 @@ class Workout extends Model
             ->withTimestamps()
             ->orderBy('workout_exercises.position');
     }
+
+    public function favoritedBy()
+    {
+        return $this->belongsToMany(User::class, 'workout_favorites')->withTimestamps();
+    }
 }