Error Handling

Prinsip

1. Never swallow errors — Jangan biarkan catch block kosong.
2. User-friendly messages — Tampilkan pesan error yang bisa dipahami user.
3. Logging — Log error secara detail untuk debugging (tapi jangan log sensitive data).
4. Retry mechanism — Berikan opsi retry untuk recoverable errors.
5. Graceful degradation — Tampilkan cached data jika network gagal.

Error Classification

Tipe Error	Contoh	Handling
Network Error	No internet, timeout	Show retry button + cached data
Server Error (5xx)	Internal server error	Show generic error + retry
Client Error (4xx)	Validation, unauthorized	Show specific error message
Auth Error (401/403)	Token expired	Auto refresh token / redirect to login
Parse Error	Malformed JSON	Log error + show generic message
Unknown Error	Unexpected exception	Log to crash reporting + generic message

Error UI States

Setiap screen harus menangani:

1. Loading — Skeleton / shimmer / spinner
2. Success — Tampilkan data
3. Empty — Tampilkan empty state illustration + message
4. Error — Tampilkan error message + retry button
5. No Internet — Tampilkan offline indicator + cached data (jika ada)