formio_api

Pure Dart client library for Form.io REST API integration.

Features

• 🎯 Pure Dart: No Flutter dependencies - works in any Dart environment
• 📡 Complete API Coverage: Forms, submissions, users, roles, actions
• 🔐 Authentication: JWT-based auth with token management
• 🌐 Network Layer: Built on Dio with interceptors and logging
• 📦 Type-Safe Models: Full Dart models for all Form.io entities
• ⚙️ Business Logic: Conditional evaluation, calculations, interpolation

Installation

dependencies:
  formio_api: ^2.0.0

Usage

Basic Example

import 'package:formio_api/formio_api.dart';

void main() async {
  // Configure API client
  ApiClient.setBaseUrl(Uri.parse('https://examples.form.io'));
  
  // Fetch forms
  final formService = FormService(ApiClient());
  final forms = await formService.fetchForms();
  
  print('Loaded ${forms.length} forms');
  
  // Get a specific form
  final form = await formService.fetchForm('user');
  print('Form: ${form.title}');
  
  // Submit data
  final submissionService = SubmissionService(ApiClient());
  await submissionService.submit('user', {
    'firstName': 'John',
    'lastName': 'Doe',
    'email': 'john@example.com',
  });
}

Authentication

final authService = AuthService(ApiClient());

// Login
final user = await authService.login('user@example.com', 'password');
print('Logged in as: ${user.email}');

// The token is automatically stored and used for subsequent requests

Working with Forms

final formService = FormService(ApiClient());

// List all forms
final forms = await formService.fetchForms();

// Get specific form
final form = await formService.fetchForm('formPath');

// Access form components
for (final component in form.components) {
  print('${component.label}: ${component.type}');
}

Submissions

final service = SubmissionService(ApiClient());

// Create submission
await service.submit('formPath', {'field': 'value'});

// List submissions
final submissions = await service.fetchSubmissions('formPath');

// Update submission
await service.updateSubmission('formPath', 'submissionId', {'field': 'newValue'});

// Delete submission
await service.deleteSubmission('formPath', 'submissionId');

Advanced Features

Conditional Logic Evaluation

import 'package:formio_api/formio_api.dart';

final conditional = {
  'show': 'true',
  'when': 'country',
  'eq': 'USA'
};

final formData = {'country': 'USA'};

final shouldShow = ConditionalEvaluator.shouldShow(conditional, formData);
print('Show component: $shouldShow'); // true

Calculated Values

final calculateValue = 'value = data.price * data.quantity';
final formData = {'price': 10.0, 'quantity': 5};

final result = CalculationEvaluator.evaluate(calculateValue, formData);
print('Total: $result'); // 50.0

API Reference

Services

• FormService: Manage forms (list, get, create, update, delete)
• SubmissionService: Handle form submissions (CRUD operations)
• AuthService: User authentication (login, logout, register)
• UserService: User management
• ActionService: Form actions and webhooks

Models

• FormModel: Form definition with components
• ComponentModel: Individual form components
• SubmissionModel: Form submission data
• UserModel: User accounts
• ActionModel: Form actions
• RoleModel: User roles

Core Utilities

• ConditionalEvaluator: Evaluate component conditional logic
• CalculationEvaluator: Calculate field values
• InterpolationUtils: String interpolation with form data

For Flutter Apps

If you're building a Flutter application, use the flutter_formio package instead, which includes:

• All formio_api functionality
• Pre-built Flutter widgets for rendering forms
• Material Design components
• Form validation UI
• Custom component system

License

License information

Contributing

Contributions welcome! Please read our contributing guidelines.