6.3 KiB
6.3 KiB
Implementation Plan
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1. Set up project structure and core dependencies
- Create Node.js project with Express.js framework
- Install required dependencies: sqlite3, better-sqlite3, xlsx, jsbarcode, qrcode, jspdf, multer
- Set up basic project directory structure with separate folders for routes, services, models, and public assets
- Requirements: 5.1, 5.3
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2. Implement database schema and connection utilities
- Create SQLite database initialization script with all required tables
- Implement database connection management with proper error handling
- Write database migration utilities for schema updates
- Create indexes for optimal query performance on product_code and inventory lookups
- Requirements: 5.1, 5.2, 5.3
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3. Create data models and validation
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3.1 Implement Product model with validation
- Write Product class with validation methods for product_code, description, and category
- Create unit tests for Product model validation and database operations
- Implement CRUD operations for products table
- Requirements: 1.2, 5.4
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3.2 Implement Inventory model with audit trail
- Write Inventory class with current level tracking and history logging
- Create unit tests for inventory updates and history recording
- Implement concurrent update handling with proper locking
- Requirements: 3.3, 5.1, 5.2
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4. Build Excel import functionality
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4.1 Create Excel parsing service
- Implement ExcelImportService to read .xlsx and .xls files
- Write column detection logic to identify product codes, descriptions, and quantities
- Create unit tests for various Excel file formats and structures
- Requirements: 1.1, 1.2
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4.2 Implement data validation and error handling
- Write validation logic for imported data with detailed error reporting
- Create batch import functionality with transaction support
- Implement duplicate handling options (skip, update, rename)
- Write unit tests for validation scenarios and error conditions
- Requirements: 1.2, 1.3
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5. Develop barcode and QR code generation
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5.1 Create code generation service
- Implement CodeGenerationService with support for multiple barcode formats
- Write QR code generation with embedded product data
- Create unit tests for code generation accuracy and format validation
- Requirements: 2.1, 2.2
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5.2 Build printable layout generator
- Implement PDF generation for printable barcode/QR code layouts
- Create customizable templates for different label sizes
- Write unit tests for PDF generation and layout formatting
- Requirements: 2.3, 2.4
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6. Create web API endpoints
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6.1 Implement product management endpoints
- Create REST API endpoints for product CRUD operations
- Write endpoints for bulk product import from Excel files
- Implement proper error handling and response formatting
- Create unit tests for all API endpoints
- Requirements: 1.1, 1.3
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6.2 Implement inventory management endpoints
- Create API endpoints for inventory level updates and queries
- Write endpoints for inventory history retrieval
- Implement concurrent update handling with optimistic locking
- Create unit tests for inventory operations and concurrency scenarios
- Requirements: 3.1, 3.2, 3.3
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6.3 Create code generation and export endpoints
- Implement API endpoints for barcode/QR code generation
- Write endpoints for Excel export with updated inventory data
- Create PDF generation endpoints for printable layouts
- Write unit tests for generation and export functionality
- Requirements: 2.1, 2.3, 4.1, 4.2
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7. Build frontend user interface
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7.1 Create Excel import interface
- Build file upload component with drag-and-drop support
- Implement data preview and validation error display
- Create progress indicators for import operations
- Write frontend tests for import workflow
- Requirements: 1.1, 1.2, 1.3
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7.2 Implement barcode generation interface
- Create product selection interface for code generation
- Build barcode/QR code format selection and preview
- Implement printable layout customization options
- Write frontend tests for code generation workflow
- Requirements: 2.1, 2.2, 2.3
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7.3 Build scanning interface
- Implement camera-based barcode/QR code scanning using browser APIs
- Create manual code entry fallback option
- Build inventory update interface with quantity input
- Write frontend tests for scanning and update workflow
- Requirements: 3.1, 3.2, 3.3, 3.4
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8. Implement export functionality
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8.1 Create Excel export service
- Write service to generate Excel files with updated inventory data
- Implement timestamp tracking and audit information inclusion
- Maintain original Excel structure and formatting where possible
- Create unit tests for export accuracy and format preservation
- Requirements: 4.1, 4.2, 4.3
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8.2 Complete export interface and download functionality
- Add export tab to frontend interface with filtering options
- Implement file download functionality with proper headers
- Add export history tracking and management interface
- Connect frontend export interface to backend export endpoints
- Requirements: 4.1, 4.4
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9. Add comprehensive error handling and logging
- Implement centralized error handling middleware for Express app
- Add structured logging system with different log levels
- Enhance user-friendly error messages across all interfaces
- Add error recovery mechanisms and retry logic where appropriate
- Requirements: 1.2, 3.4, 5.1
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10. Create integration tests and performance optimization
- Write end-to-end tests for complete workflows (import → generate → scan → export)
- Add performance tests for large inventory datasets (1000+ products)
- Optimize database queries and add proper indexing
- Test concurrent user scenarios and add appropriate locking
- Requirements: 5.2, 5.4
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11. Build deployment configuration and documentation
- Create production deployment configuration with environment variables
- Write comprehensive API documentation with endpoint specifications
- Create user guide for Excel format requirements and system usage
- Implement database backup and recovery procedures
- Add Docker configuration for containerized deployment
- Requirements: 5.3