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mayr_fake_api v2.0.0 - Project Summary

Overview

This document summarizes the complete implementation of the mayr_fake_api package version 2.0.0, a Flutter package that intercepts API calls and returns fake JSON responses from local files during development. This major release introduces a flat JSON structure for simplified asset management and adds debug logging capabilities.

✅ Completed Features

V2.0.0 New Features

  1. Flat JSON Structure ✅

    • Uses dot notation instead of nested directories (e.g., user.profile.get.json)
    • Simplifies asset management - only one directory needed in pubspec.yaml
    • Automatically tries flat structure first, then falls back to nested (v1.x)
    • Supports dynamic wildcards in flat structure (e.g., user.-.profile.get.json)

  2. Debug Mode ✅

    • New debug parameter in MayrFakeApi.init()
    • Console logging of request interception, file loading, and responses
    • Helps developers troubleshoot fake API issues
    • Can be enabled conditionally (e.g., debug: kDebugMode)

  3. Organizational Changes ✅

    • Repository transferred to MayR-Labs organization
    • All URLs updated to reflect new ownership
    • LICENSE updated to MayR Labs

  4. Backward Compatibility ✅

    • Full compatibility with v1.x nested structure
    • Seamless migration path for existing users
    • No breaking changes required

Core Functionality (From V1.0.0)

  1. Dio Interceptor Integration ✅

    • Custom MayrFakeInterceptor extends Dio's Interceptor
    • Seamlessly integrates with existing Dio instances
    • Non-invasive design - can be enabled/disabled at runtime

  2. Path Resolution ✅

    • Converts HTTP request paths to asset file paths
    • Removes domain names and leading slashes
    • Maps HTTP methods to corresponding JSON files

  3. HTTP Method Support ✅

    • GET → user.profile.get.json (v2.0) or get.json (v1.x)
    • POST → user.profile.post.json (v2.0) or post.json (v1.x)
    • PUT → user.profile.put.json (v2.0) or put.json (v1.x)
    • DELETE → user.profile.delete.json (v2.0) or delete.json (v1.x)
    • Any HTTP method supported

  4. Dynamic Path Support (Wildcards) ✅

    • Use - as wildcard in path (e.g., user.-.profile.get.json in v2.0)
    • Use - in directory structure (e.g., user/-/profile/get.json in v1.x)
    • Matches any value in that path segment
    • Supports multiple wildcards in a single path

  5. Placeholder Replacement ✅

    • $1, $2, $3, etc. - Replaced with wildcard values
    • $timestamp - Replaced with current ISO 8601 timestamp
    • Works recursively in nested JSON structures

  6. Empty File Handling ✅

    • Automatically returns 204 No Content for empty JSON files
    • No special configuration required

  7. Error Simulation ✅

    • error.json files for simulating errors
    • Only used when statusCode >= 400
    • Automatically throws DioException with error data

  8. Custom 404 Resolver ✅

    • Optional callback for handling missing endpoints
    • Default 404 response provided
    • Full control over not-found behavior

  9. Network Delay Simulation ✅

    • Configurable delay duration
    • Simulates network latency
    • Helps test loading states

  10. Enable/Disable Toggle ✅

    • Runtime enable/disable support
    • Integration with kDebugMode
    • Easy production/development switching

Code Quality

  1. Documentation ✅

    • Comprehensive inline documentation
    • API reference (doc/API.md)
    • Quick start guide (doc/QUICKSTART.md)
    • Contributing guidelines (CONTRIBUTING.md)

  2. Tests ✅

    • Unit tests for all classes
    • Integration tests for end-to-end scenarios
    • Test assets included
    • Tests cover all major features

  3. Code Formatting ✅

    • Formatted with dart format
    • Follows Dart style guidelines
    • Consistent code style throughout

  4. Package Structure ✅

    • Clean separation of concerns
    • Proper exports in main library file
    • Source files in src/ directory

Examples and Documentation

  1. Example Application ✅

    • Complete working Flutter app
    • Demonstrates all major features
    • Interactive UI to test endpoints
    • Sample asset files included

  2. Sample Assets ✅

    • User profile endpoints (GET, POST)
    • Dynamic user endpoint with wildcards
    • Products listing
    • Product details
    • Empty file example
    • Error simulation example

  3. Documentation Files ✅

    • README.md - Main documentation (updated for v2.0)
    • CHANGELOG.md - Version history (v2.0.0 added)
    • MIGRATION.md - Migration guide from v1.x to v2.0
    • CONTRIBUTING.md - Contribution guidelines
    • doc/API.md - Comprehensive API reference
    • doc/QUICKSTART.md - Getting started guide (updated for v2.0)
    • example/README.md - Example documentation

📦 Package Structure

mayr_fake_api/
├── lib/
│   ├── mayr_fake_api.dart              # Main export file
│   └── src/
│       ├── mayr_fake_api.dart          # Core API class with debug support
│       ├── mayr_fake_interceptor.dart  # Dio interceptor with flat structure support
│       ├── placeholder_replacer.dart   # Placeholder replacement logic
│       └── mayr_fake_response.dart     # Response model
├── test/
│   ├── mayr_dart_fake_api_test.dart # Unit tests
│   ├── integration_test.dart           # Integration tests
│   ├── flat_structure_test.dart        # V2.0 flat structure tests (NEW)
│   └── assets/api/                     # Test assets (both structures)
│       ├── test_endpoint.get.json      # Flat structure (NEW)
│       ├── placeholders.get.json       # Flat structure (NEW)
│       ├── all_placeholders.get.json   # Flat structure (NEW)
│       ├── dynamic.-.data.get.json     # Flat structure (NEW)
│       └── (nested v1.x files still present for backward compatibility)
├── example/
│   ├── lib/main.dart                   # Example app with debug mode (UPDATED)
│   ├── assets/api/                     # Example assets (both structures)
│   │   ├── user.profile.get.json       # Flat structure (NEW)
│   │   ├── user.profile.post.json      # Flat structure (NEW)
│   │   ├── user.profile.error.json     # Flat structure (NEW)
│   │   ├── user.-.profile.get.json     # Flat structure with wildcard (NEW)
│   │   ├── products.get.json           # Flat structure (NEW)
│   │   ├── products.details.get.json   # Flat structure (NEW)
│   │   ├── empty.get.json              # Flat structure (NEW)
│   │   └── (nested v1.x files still present)
│   └── README.md
├── doc/
│   ├── API.md                          # API documentation
│   └── QUICKSTART.md                   # Quick start guide (UPDATED)
├── CHANGELOG.md                        # Version history (V2.0.0 ADDED)
├── MIGRATION.md                        # Migration guide (NEW)
├── CONTRIBUTING.md                     # Contributing guidelines
├── README.md                           # Main documentation (UPDATED)
├── LICENSE                             # MIT License (UPDATED to MayR Labs)
├── PROJECT_SUMMARY.md                  # This file (UPDATED)
└── pubspec.yaml                        # Package configuration (V2.0.0)

📊 Statistics

  • Total Source Lines: ~500+ lines (including v2.0 enhancements)
  • Test Lines: ~450+ lines (including flat structure tests)
  • Example Lines: ~190 lines
  • Documentation: 7 markdown files, ~18,000 words
  • Sample Assets: 20+ JSON files (both flat and nested structures)
  • Test Coverage: All major features tested including v2.0 flat structure

🔑 Key Classes

MayrFakeApi

  • Purpose: Main entry point for package initialization
  • Key Methods:
    • init() - Initialize and attach to Dio (now with debug parameter)
    • resolveNotFound() - Set custom 404 handler
    • enable() / disable() - Runtime control
  • V2.0 Enhancements: Added debug parameter for logging

MayrFakeInterceptor

  • Purpose: Intercepts and processes requests
  • Key Features:
    • Flat file resolution (v2.0)
    • Path resolution logic
    • Wildcard matching (supports both structures)
    • Placeholder replacement
    • Asset loading with fallback
    • Response generation
    • Debug logging (v2.0)
  • V2.0 Enhancements:
    • Flat structure support with _convertToFlatPath()
    • _tryFlatWithWildcards() for dynamic flat paths
    • Debug logging throughout request lifecycle
    • Automatic fallback to nested structure

MayrFakeResponse

  • Purpose: Response data model
  • Key Features:
    • statusCode and data fields
    • JSON serialization/deserialization
    • Immutable design

🎯 Design Decisions

  1. Dio Integration: Chose Dio's interceptor pattern for seamless integration
  2. Asset-Based: Uses Flutter's asset system for simplicity and offline support
  3. Flat Structure (v2.0): Simplified asset management with dot notation
  4. Backward Compatibility: Maintains v1.x nested structure support
  5. Debug Mode (v2.0): Console logging for troubleshooting
  6. Wildcard Pattern: Uses - for clarity and consistency (works in both structures)
  7. Placeholder Syntax: Uses $n format common in string templates
  8. Immutable Models: Uses const constructors for efficiency
  9. Fallback Strategy: Tries flat first, then nested for smooth migration

🧪 Testing Strategy

  1. Unit Tests: Test individual components in isolation
  2. Integration Tests: Test end-to-end scenarios
  3. Example App: Manual testing and demonstration
  4. Test Assets: Dedicated assets for automated testing

📝 Documentation Strategy

  1. Inline Comments: Document public APIs with dartdoc comments
  2. README: High-level overview and getting started
  3. API Reference: Detailed API documentation
  4. Quick Start: Step-by-step tutorial
  5. Example: Working code demonstrating usage
  6. Contributing: Guidelines for contributors

🚀 Ready for Release

The package is complete and ready for v2.0.0 release with:

  • ✅ All v2.0.0 features implemented (flat structure, debug mode)
  • ✅ Full backward compatibility with v1.x
  • ✅ Comprehensive tests (including flat structure tests)
  • ✅ Full documentation updated
  • ✅ Working example application with debug mode
  • ✅ Sample assets in both structures
  • ✅ Migration guide for v1.x users
  • ✅ Code formatted and organized
  • ✅ CHANGELOG updated for v2.0.0
  • ✅ Version set to 2.0.0
  • ✅ Repository transferred to MayR-Labs
  • ✅ All URLs and branding updated

📌 Future Enhancements (Out of Scope for v2.0.0)

Potential features for future versions:

  1. Response caching
  2. Enhanced logging and analytics
  3. Conditional responses based on request data
  4. GraphQL support
  5. WebSocket simulation
  6. Response templates
  7. Advanced data faker integration
  8. CLI tool for generating mock data
  9. Response history and replay
  10. Request validation

🎉 Conclusion

The mayr_fake_api package v2.0.0 is complete, tested, documented, and ready for use. It provides a significantly simplified approach to simulating API responses during Flutter app development, with easier asset management through the flat JSON structure and improved debugging capabilities. The package maintains full backward compatibility with v1.x, ensuring a smooth migration path for existing users.