@warriorteam/redai-zalo-sdk

# RedAI Zalo SDK Architecture ## Overview RedAI Zalo SDK là một TypeScript SDK hoàn chỉnh cho các API của Zalo, được thiết kế với kiến trúc modular và type-safe. ## Cấu trúc thư mục ``` redai-zalo-sdk/ ├── src/ │ ├── types/ # Type definitions │ │ ├── common.ts # Common types và interfaces │ │ ├── auth.ts # Authentication types │ │ ├── oa.ts # Official Account types │ │ ├── message.ts # Message types │ │ └── webhook.ts # Webhook types │ ├── clients/ # HTTP clients │ │ ├── base-client.ts # Base HTTP client │ │ └── zalo-client.ts # Zalo-specific client │ ├── services/ # Business logic services │ │ ├── auth.service.ts # Authentication service │ │ ├── oa.service.ts # Official Account service │ │ └── message.service.ts # Message service │ ├── utils/ # Utility functions │ ├── index.ts # Main export file │ └── zalo-sdk.ts # Main SDK class ├── examples/ # Usage examples ├── dist/ # Build output ├── package.json ├── tsconfig.json └── README.md ``` ## Kiến trúc chính ### 1. Layered Architecture SDK được thiết kế theo kiến trúc phân lớp: ``` ┌─────────────────┐ │ Main SDK │ ← ZaloSDK class (public API) ├─────────────────┤ │ Services │ ← Business logic (AuthService, OAService, MessageService) ├─────────────────┤ │ Clients │ ← HTTP communication (BaseClient, ZaloClient) ├─────────────────┤ │ Types │ ← Type definitions và interfaces └─────────────────┘ ``` ### 2. Core Components #### ZaloSDK (Main Class) - Entry point cho tất cả các chức năng - Khởi tạo và quản lý các services - Cung cấp quick methods cho các tác vụ phổ biến - Quản lý configuration và lifecycle #### BaseClient - HTTP client cơ bản với axios - Retry mechanism - Error handling - Request/response logging - File upload support #### ZaloClient - Extends BaseClient - Zalo-specific endpoints - API versioning support - OAuth và ZNS endpoint handling #### Services - **AuthService**: OAuth flows, token management - **OAService**: Official Account operations - **MessageService**: Message sending và file upload ### 3. Type System #### Comprehensive Types - Tất cả API responses được type-safe - Union types cho message types - Enum cho constants - Generic types cho reusability #### Error Handling - Custom `ZaloSDKError` class - Structured error information - Error code mapping ### 4. Configuration ```typescript interface ZaloSDKConfig { appId: string; appSecret: string; timeout?: number; debug?: boolean; apiBaseUrl?: string; retry?: { attempts?: number; delay?: number; }; } ``` ## Design Patterns ### 1. Builder Pattern SDK configuration với default values và validation. ### 2. Service Pattern Mỗi service chịu trách nhiệm cho một domain cụ thể. ### 3. Factory Pattern Client creation và service initialization. ### 4. Strategy Pattern Different authentication flows (OA vs Social). ### 5. Observer Pattern Webhook event handling (planned). ## Key Features ### 1. Type Safety - Full TypeScript support - Comprehensive type definitions - Generic types cho flexibility - Union types cho message variants ### 2. Error Handling - Structured error responses - Retry mechanism - Detailed error information - Error code mapping ### 3. Authentication - OAuth 2.0 flows - PKCE support - Token refresh - Multiple auth scopes ### 4. Extensibility - Modular architecture - Easy to add new services - Plugin-ready design - Custom request support ### 5. Developer Experience - IntelliSense support - Comprehensive documentation - Usage examples - Debug logging ## API Design Principles ### 1. Consistency - Consistent naming conventions - Uniform error handling - Standard response formats ### 2. Simplicity - Easy-to-use public API - Quick methods cho common tasks - Sensible defaults ### 3. Flexibility - Low-level access khi cần - Custom request support - Configurable behavior ### 4. Reliability - Retry mechanisms - Error recovery - Connection testing ## Future Enhancements ### 1. Additional Services - ZNS Service (Zalo Notification Service) - User Management Service - Group Management Service - Webhook Service ### 2. Advanced Features - Rate limiting - Caching - Batch operations - Real-time subscriptions ### 3. Developer Tools - CLI tools - Testing utilities - Mock server - Documentation generator ## Testing Strategy ### 1. Unit Tests - Service logic testing - Type validation - Error handling ### 2. Integration Tests - API endpoint testing - Authentication flows - File upload/download ### 3. E2E Tests - Complete workflows - Real API interactions - Error scenarios ## Performance Considerations ### 1. HTTP Optimization - Connection pooling - Request compression - Timeout management ### 2. Memory Management - Efficient data structures - Stream processing cho large files - Garbage collection friendly ### 3. Network Efficiency - Batch requests - Caching strategies - Retry with backoff ## Security ### 1. Token Management - Secure token storage - Automatic refresh - Token validation ### 2. Request Security - HTTPS only - Request signing - Parameter validation ### 3. Error Information - Sanitized error messages - No sensitive data in logs - Secure debugging ## Deployment ### 1. Package Distribution - NPM package - TypeScript declarations - Source maps ### 2. Versioning - Semantic versioning - Backward compatibility - Migration guides ### 3. Documentation - API documentation - Usage examples - Migration guides