# ValidationStepNew Component

This is a refactored version of the original ValidationStep component with improved architecture, performance, and maintainability.

## Overview

The ValidationStepNew component is designed to replace the original ValidationStep component in the React Spreadsheet Import library. It provides the same functionality but with a more modular and maintainable codebase.

## Features

- Field-level validation (required, regex, unique)
- Row-level validation (supplier, company fields)
- UPC validation with API integration
- Template management (saving, loading, applying)
- Filtering and sorting capabilities
- Error display and management
- Special field handling (input, multi-input, select, checkbox)

## Usage

To use the new ValidationStepNew component, select the "Use new validation component" checkbox in the MatchColumnsStep. This will route you to the new implementation instead of the original one.

## Architecture

The component is structured as follows:

- **ValidationContainer**: Main container component that coordinates all subcomponents
- **ValidationTable**: Handles data display, filtering, and column configuration
- **ValidationCell**: Cell-level component with specialized rendering based on field type
- **ValidationToolbar**: Top toolbar with actions and statistics
- **ValidationSidebar**: Contains filters, actions, and other UI controls

## State Management

State is managed through custom hooks:

- **useValidationState**: Main state management hook
- **useValidation**: Validation logic
- **useTemplates**: Template management
- **useFilters**: Filtering logic
- **useUpcValidation**: UPC validation

## Development

This component is still under development. The goal is to eventually replace the original ValidationStep component completely once all functionality is implemented and tested.

## Known Issues

- Some TypeScript errors in the UploadFlow component when integrating with the new component
- Not all features from the original component are fully implemented yet

## Roadmap

1. Complete implementation of all features from the original component
2. Add comprehensive tests
3. Improve performance with virtualization for large datasets
4. Add more customization options
5. Replace the original component completely 