Panduan praktis dan terstruktur mengenai panduan flutter dengan laravel rest api: insert dan upload di flutter dengan rest api (part 4) berstandar enterprise. Pelajari konsep, implementasi kode modern, dan tips arsitektur enterprise siap produksi.
Selamat datang di seri tutorial engineering SiHubung! Pada artikel ini, kita akan membedah secara komprehensif implementasi Panduan Flutter Dengan Laravel Rest Api: Insert Dan Upload Di Flutter Dengan Rest Api (Part 4) Berstandar Enterprise dengan standar kode bersih (clean code), performa tinggi, dan arsitektur siap produksi.
Membangun aplikasi web di era modern memerlukan pondasi yang kokoh. Framework modern memberikan fleksibilitas luar biasa bagi developer untuk menghadirkan fitur kompleks secara cepat tanpa mengabaikan aspek keamanan dan keandalan sistem.
Tahapan Implementasi & Walkthrough Kode
Berikut adalah langkah demi langkah teknis yang dapat Anda ikuti langsung pada codebase Anda:
Tahap 1: Penulisan Kode & Konfigurasi
import 'package:flutter/material.dart';
class AddEditPostScreen extends StatelessWidget {
const AddEditPostScreen({super.key});
@override
Widget build(BuildContext context) {
return const Placeholder();
}
}Tahap 2: Penulisan Kode & Konfigurasi
import 'package:flutter/material.dart';
class AddEditPostScreen extends StatelessWidget {
const AddEditPostScreen({super.key});
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Theme.of(context).colorScheme.inversePrimary,
title: const Text('Add New Post'),
),
body: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
children: [
const Center(
child: Text('No Image Selected'),
),
const SizedBox(
height: 8.0,
),
TextButton(
onPressed: () {},
child: const Text('Selected Image'),
),
const SizedBox(
height: 8.0,
),
TextFormField(
textInputAction: TextInputAction.next,
onFieldSubmitted: (value) {},
decoration: const InputDecoration(
labelText: 'Title',
border: OutlineInputBorder(),
),
validator: (value) {
if (value == null || value.isEmpty) {
return 'Please Insert Title';
} else {
return null;
}
},
),
const SizedBox(
height: 16.0,
),
TextFormField(
textInputAction: TextInputAction.done,
keyboardType: TextInputType.multiline,
maxLines: null,
decoration: const InputDecoration(
labelText: 'Content',
border: OutlineInputBorder(),
),
validator: (value) {
if (value == null || value.isEmpty) {
return 'Please Insert Some Text';
} else {
return null;
}
},
),
const SizedBox(height: 12),
SizedBox(
width: double.infinity,
child: FilledButton(
onPressed: () {},
child: const Text('Submit'),
),
),
],
),
),
);
}
}Tahap 3: Penulisan Kode & Konfigurasi
return Scaffold(
appBar: AppBar(
backgroundColor: Theme.of(context).colorScheme.inversePrimary,
title: const Text('Add New Post'),
),
body:,
.......
....
)Tahap 4: Penulisan Kode & Konfigurasi
Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
children: [
const Center(
child: Text('No Image Selected'),
),
const SizedBox(
height: 8.0,
),
TextButton(
onPressed: () {},
child: const Text('Selected Image'),
),
const SizedBox(
height: 8.0,
),
TextFormField(
textInputAction: TextInputAction.next,
onFieldSubmitted: (value) {},
decoration: const InputDecoration(
labelText: 'Title',
border: OutlineInputBorder(),
),
validator: (value) {
if (value == null || value.isEmpty) {
return 'Please Insert Title';
} else {
return null;
}
},
),
const SizedBox(
height: 16.0,
),
TextFormField(
textInputAction: TextInputAction.done,
keyboardType: TextInputType.multiline,
maxLines: null,
decoration: const InputDecoration(
labelText: 'Content',
border: OutlineInputBorder(),
),
validator: (value) {
if (value == null || value.isEmpty) {
return 'Please Insert Some Text';
} else {
return null;
}
},
),
const SizedBox(height: 12),
SizedBox(
width: double.infinity,
child: FilledButton(
onPressed: () {},
child: const Text('Submit'),
),
),
],
),
),Tahap 5: Penulisan Kode & Konfigurasi
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => const AddEditPostScreen(),
),
);Tahap 6: Penulisan Kode & Konfigurasi
.......
.........
floatingActionButton: FloatingActionButton(
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => const AddEditPostScreen(),
),
);
},
child: const Icon(Icons.add),
),
..............Tahap 7: Penulisan Kode & Konfigurasi
final _formKey = GlobalKey<FormState>();
final _titleController = TextEditingController();
final _contentController = TextEditingController();
final _titleFocus = FocusNode();
final _contentFocus = FocusNode();
File? _image;
final picker = ImagePicker();
final Repository apiService = Repository();
Future getImage() async {
final pickedFile = await picker.pickImage(source: ImageSource.gallery);
setState(() {
if (pickedFile != null) {
_image = File(pickedFile.path);
} else {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(content: Text('No Image Selected')),
);
}
});
}
@override
void dispose() {
_titleController.dispose();
_contentController.dispose();
super.dispose();
}
Future<void> _submitData() async {
if (_formKey.currentState!.validate() && _image != null) {
bool success = await apiService.insertPost(
_image,
_titleController.text,
_contentController.text,
);
if (!mounted) return;
if (success) {
Navigator.pop(context, true);
} else {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(content: Text('Failed to Create Post')),
);
}
}
}Tahap 8: Penulisan Kode & Konfigurasi
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter_pemula/api/repository.dart';
import 'package:image_picker/image_picker.dart';
class AddEditPostScreen extends StatefulWidget {
const AddEditPostScreen({super.key});
@override
State<AddEditPostScreen> createState() => _AddEditPostScreenState();
}
class _AddEditPostScreenState extends State<AddEditPostScreen> {
final _formKey = GlobalKey<FormState>();
final _titleController = TextEditingController();
final _contentController = TextEditingController();
final _titleFocus = FocusNode();
final _contentFocus = FocusNode();
File? _image;
final picker = ImagePicker();
final Repository apiService = Repository();
Future getImage() async {
final pickedFile = await picker.pickImage(source: ImageSource.gallery);
setState(() {
if (pickedFile != null) {
_image = File(pickedFile.path);
} else {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(content: Text('No Image Selected')),
);
}
});
}
@override
void dispose() {
_titleController.dispose();
_contentController.dispose();
_titleFocus.dispose();
_contentFocus.dispose();
super.dispose();
}
Future<void> _submitData() async {
if (_formKey.currentState!.validate() && _image != null) {
bool success = await apiService.insertPost(
_image,
_titleController.text,
_contentController.text,
);
if (!mounted) return;
if (success) {
Navigator.pop(context, true);
} else {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(content: Text('Failed to Create Post')),
);
}
}
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Theme.of(context).colorScheme.inversePrimary,
title: const Text('Add New Post'),
),
body: Form(
key: _formKey,
child: SingleChildScrollView(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
children: [
Center(
child: _image == null
? const Text('No Image Selected')
: Image.file(
_image!,
height: 200,
width: 200,
),
),
const SizedBox(
height: 8.0,
),
TextButton(
onPressed: getImage,
child: const Text('Selected Image'),
),
const SizedBox(
height: 8.0,
),
TextFormField(
controller: _titleController,
focusNode: _titleFocus,
textInputAction: TextInputAction.next,
onFieldSubmitted: (value) {},
decoration: const InputDecoration(
labelText: 'Title',
border: OutlineInputBorder(),
),
validator: (value) {
if (value == null || value.isEmpty) {
return 'Please Insert Title';
} else {
return null;
}
},
),
const SizedBox(
height: 16.0,
),
TextFormField(
controller: _contentController,
focusNode: _contentFocus,
textInputAction: TextInputAction.done,
keyboardType: TextInputType.multiline,
maxLines: null,
decoration: const InputDecoration(
labelText: 'Content',
border: OutlineInputBorder(),
),
validator: (value) {
if (value == null || value.isEmpty) {
return 'Please Insert Some Text';
} else {
return null;
}
},
),
const SizedBox(height: 12),
SizedBox(
width: double.infinity,
child: FilledButton(
onPressed: () => _submitData(),
child: const Text('Submit'),
),
),
],
),
),
),
),
);
}
}Tahap 9: Penulisan Kode & Konfigurasi
..........
floatingActionButton: FloatingActionButton(
onPressed: () async {
var result = await Navigator.push(
context,
MaterialPageRoute(
builder: (context) => const AddEditPostScreen(),
),
);
if (result == true) {
_currentPage = 1;
_posts.clear();
_hasMore = true;
_loadPosts();
}
},
...............
💡 Tips Rekayasa Perangkat Lunak (SiHubung Engineering Best Practice)
Selalu gunakan pendekatan deklaratif, validasi input seawal mungkin di boundary layer, dan lakukan logging terstruktur untuk memudahkan observability ketika sistem dijalankan di lingkungan cloud produksi.
Kesimpulan
Dengan mengikuti langkah-langkah terstruktur di atas, implementasi modul Anda akan jauh lebih rapi, aman dari bug umum, serta siap diskalakan ke lingkungan produksi.
Nantikan artikel tutorial praktis lainnya seputar fullstack development, microservices, dan otomasi AI di Blog Engineering SiHubung. Selamat mencoba!
