# Session History - 2025-12-23: Document Numbering Form Refactoring

## Objective
Refactor and debug the "Test Number Generation" (Template Tester) form to support real API validation and master data integration.

## Key Changes

### 1. Frontend Refactoring (`template-tester.tsx`)
- **Master Data Integration**: Replaced manual text inputs with `Select` components for Originator, Recipient, Document Type, and Discipline.
- **Dynamic Data Hook**:
    - Integrated `useOrganizations`, `useCorrespondenceTypes`, and `useDisciplines`.
    - Fixed empty Discipline list by adding `useContracts` to fetch active contracts for the project and deriving `contractId` dynamically.
- **API Integration**: Switched from mock `generateTestNumber` to backend `previewNumber` endpoint.
- **UI Enhancements**:
    - Added "Default (All Types)" and "None" options to dropdowns.
    - Improved error feedback with a visible error card if generation fails.
- **Type Safety**:
    - Resolved multiple lint errors (`Unexpected any`, missing properties).
    - Updated `SearchOrganizationDto` in `organization.dto.ts` to include `isActive`.

### 2. Backend API Harmonization
- **DTO Updates**:
    - Refactored `PreviewNumberDto` to use `originatorId` and `typeId` (aligned with frontend naming).
    - Added `@Type(() => Number)` and `@IsInt()` to ensure proper payload transformation.
- **Service Logic**:
    - Fixed `CounterService` mapping to correctly use the entity property `originatorId` instead of the DTO naming `originatorOrganizationId` in WHERE clauses and creation logic.
    - Updated `DocumentNumberingController` to map the new DTO properties.

### 3. Troubleshooting & Reversion
- **Issue**: "Format Preview" was reported as missing.
- **Action**: Attempted a property rename from `formatTemplate` to `formatString` across the frontend based on database column naming.
- **Result**: This caused the entire Document Numbering page to fail (UI became empty) because the backend entity still uses the property name `formatTemplate`.
- **Resolution**: Reverted all renaming changes back to `formatTemplate`. The initial "missing" issue was resolved by ensuring proper prop passing and data loading.

## Status
- **Test Generation Form**: Fully functional and integrated with real master data.
- **Preview API**: Validated and working with correct database mapping.
- **Next Steps**: Monitor for any further data-specific generation errors (e.g., Template format parsing).

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**Reference Task**: [TASK-FE-017-document-numbering-refactor.md](../06-tasks/TASK-FE-017-document-numbering-refactor.md)