$this->id, 'patient_id' => $this->patient_id, 'package' => new PackageResource($this->package), 'total_sessions' => $this->total_sessions, 'remaining_sessions' => $this->remaining_sessions, 'used_sessions' => $this->total_sessions - $this->remaining_sessions, 'start_date' => $this->start_date->format('Y-m-d'), 'end_date' => $this->end_date->format('Y-m-d'), 'status' => $this->status, 'created_at' => $this->created_at?->format('Y-m-d H:i:s'), ]; } }