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Josh Myers
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DEVELOPMENT_GUIDE.md
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DEVELOPMENT_GUIDE.md
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# Development Guide: Bank Transactions & Payment Recording
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Complete implementation of bank transaction CSV import and AR invoice payment recording for the ERP platform.
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## Quick Links
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### Documentation
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- **API_ENDPOINTS.md** - Complete API reference with examples
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- **IMPLEMENTATION_SUMMARY.md** - Technical architecture and implementation details
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- **EXAMPLE_CSVs.md** - Sample CSV files and testing guide
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- **FRONTEND_INTEGRATION_GUIDE.md** - Frontend code examples and patterns
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### Code Files
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- **API: Bank Transaction Import** - `/src/app/api/bank-transactions/import/route.ts`
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- **API: CSV Parser** - `/src/app/api/bank-transactions/parse-csv/route.ts`
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- **UI: AR Invoice Detail** - `/src/app/(dashboard)/finance/ar/invoice/[invoiceId]/page.tsx`
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- **UI: AR List Page** - `/src/app/(dashboard)/finance/ar/page.tsx`
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## What Was Built
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### Task 1: Bank Transaction CSV Import Endpoint
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Two new API endpoints for importing bank transactions from CSV files:
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1. **POST `/api/bank-transactions/parse-csv`**
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- Accept CSV file upload
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- Parse and validate
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- Return preview of transactions
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- No external dependencies (pure TypeScript CSV parser)
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2. **POST `/api/bank-transactions/import`**
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- Bulk import validated transactions
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- Atomic operation (all or nothing)
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- Verify bank account ownership
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- Return count of imported transactions
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**Features:**
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- Supports 2 CSV formats (Amount or Debit/Credit columns)
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- Handles quoted fields with commas
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- Handles escaped quotes
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- Auto-detects CSV format
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- Comprehensive validation
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- Organization isolation
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### Task 2: AR Invoice Payment Recording
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Enhanced AR invoice detail page with payment recording capability:
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1. **Payment Recording Modal**
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- Form for entering payment details
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- Payment amount (validated > 0)
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- Payment date (date picker)
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- Payment method (dropdown with 7 options)
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- Error handling and loading states
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2. **Integration with Existing Payment API**
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- Uses existing `/api/payments` endpoint
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- Automatically updates invoice balances
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- Updates invoice status (PAID or PARTIALLY_PAID)
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- Creates payment allocations
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3. **AR List Page Integration**
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- "Record Payment" action in context menu
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- Navigates to invoice detail with auto-opening modal
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- Direct payment entry from list
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**Features:**
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- Modal auto-opens with query parameter `?action=payment`
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- Form validation on client and server
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- Error display with helpful messages
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- Loading state during submission
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- Auto-refresh after successful payment
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- Maintains invoice context
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## Architecture
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### Authentication & Multi-Tenancy
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- All endpoints use `getOrganization()` for tenant isolation
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- Bank account ownership verified before import
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- Organization ID included in all queries
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### Error Handling
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- Standard HTTP status codes
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- Descriptive error messages
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- Input validation on both client and server
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- Proper exception handling with try-catch
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### Data Flow
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#### CSV Import
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```
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User uploads CSV
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↓
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Parse endpoint validates and extracts transactions
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↓
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UI displays preview of parsed transactions
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↓
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User confirms import
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↓
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Import endpoint validates and bulk inserts
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↓
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Success response with transaction count
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↓
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Transactions appear in bank account
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```
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#### Payment Recording
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```
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User clicks "Record Payment" button
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↓
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Modal form opens
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↓
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User enters payment details
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↓
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User submits form
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↓
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Payment endpoint creates payment record
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↓
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Invoice balances updated
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↓
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Invoice status updated
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↓
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Modal closes, page refreshes
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```
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## API Reference
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### Parse CSV
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```bash
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POST /api/bank-transactions/parse-csv
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Content-Type: multipart/form-data
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file: [CSV file]
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```
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Response:
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```json
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{
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"success": true,
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"count": 100,
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"transactions": [
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{
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"transactionDate": "2024-01-15",
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"description": "Office Supplies",
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"transactionType": "DEBIT",
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"amount": 150.50
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}
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]
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}
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```
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### Import Transactions
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```bash
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POST /api/bank-transactions/import
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Content-Type: application/json
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{
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"bankAccountId": "uuid",
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"transactions": [...]
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}
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```
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Response:
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```json
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{
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"success": true,
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"imported": 100,
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"message": "Successfully imported 100 transaction(s)"
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}
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```
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### Record Payment
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```bash
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POST /api/payments
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Content-Type: application/json
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{
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"paymentDate": "2024-01-20",
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"paymentMethod": "ACH",
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"paymentAmount": 1500.00,
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"customerId": "uuid",
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"invoiceId": "uuid",
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"paymentAllocations": [...]
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}
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```
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Response: Created payment object with payment number and allocations
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## Development Workflow
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### 1. Testing CSV Import
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**Prepare Test Data:**
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1. Create or download CSV file (see EXAMPLE_CSVs.md)
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2. Ensure correct format with Date, Description, Amount columns
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3. Verify bank account exists in system
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**Test Parse Endpoint:**
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```bash
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curl -X POST http://localhost:3000/api/bank-transactions/parse-csv \
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-F "file=@test.csv"
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```
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**Test Import Endpoint:**
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```bash
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curl -X POST http://localhost:3000/api/bank-transactions/import \
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-H "Content-Type: application/json" \
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-d '{
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"bankAccountId": "your-account-id",
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"transactions": [... parsed transactions ...]
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}'
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```
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### 2. Testing Payment Recording
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**Manual Testing:**
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1. Log into application
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2. Navigate to AR invoices
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3. Click on any open invoice
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4. Click "Record Payment" button
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5. Enter payment details
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6. Submit form
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7. Verify invoice status updates
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**Test with Query Parameter:**
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```
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/finance/ar/invoice/{invoiceId}?action=payment
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```
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Should auto-open payment modal.
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### 3. Frontend Integration
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Build the CSV import UI using FRONTEND_INTEGRATION_GUIDE.md as reference:
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- File upload component
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- CSV preview table
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- Bank account selector
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- Import confirmation
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## CSV Format Examples
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### Format 1: Date, Description, Amount
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```csv
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Date,Description,Amount
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2024-01-15,Office Supplies,150.50
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2024-01-16,Client Payment,2500.00
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```
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### Format 2: Date, Description, Debit, Credit
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```csv
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Date,Description,Debit,Credit
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2024-01-15,Office Supplies,150.50,0
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2024-01-16,Client Payment,0,2500.00
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```
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### Format 3: With Quoted Descriptions
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```csv
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Date,Description,Amount
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2024-01-15,"Office Supplies, Inc., Springfield",150.50
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2024-01-16,"Client Payment, Invoice #INV-123",2500.00
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```
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See EXAMPLE_CSVs.md for more examples and bank-specific formats.
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## Common Issues & Troubleshooting
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### CSV Not Parsing
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- Check column headers (Date, Description required)
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- Verify file is valid CSV format
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- Check for special characters in descriptions
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- Ensure amounts are numeric without currency symbols
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### Import Fails
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- Verify bank account ID is correct
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- Check organization ownership
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- Validate transaction types are DEBIT or CREDIT
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- Ensure amounts are positive numbers
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### Payment Not Recording
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- Verify customer exists
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- Verify invoice exists and belongs to customer
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- Check invoice status (some statuses may be readonly)
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- Verify payment amount is greater than 0
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### Modal Not Opening
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- Check URL has `?action=payment` query parameter
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- Verify invoice detail page loads successfully
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- Check browser console for JavaScript errors
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- Clear browser cache and reload
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## Performance Considerations
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### CSV Import
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- Supports files up to 10MB (50,000+ transactions)
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- Bulk import in single database operation
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- No row-by-row processing overhead
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- Consider pagination for preview if 1000+ transactions
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### Payment Recording
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- Modal form lightweight component
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- Single API call per payment
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- Invoice refetch may take few seconds
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- Fallback to page refresh if needed
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## Security Notes
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### Authentication
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- All endpoints require valid session
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- Organization isolation enforced
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- Bank account ownership verified
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### Input Validation
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- Transaction amounts must be positive
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- Transaction types must be valid enum
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- Bank account must belong to organization
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- Customer and invoice must exist and match organization
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### Data Protection
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- CSV data validated before import
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- Transactions created with status PENDING
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- Organization ID required for all queries
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- Proper HTTP status codes for errors
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## Future Enhancements
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1. **CSV Column Mapping**
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- Allow users to map custom CSV columns
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- Save mappings for future imports
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2. **Batch Payment Import**
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- Import payments from CSV
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- Auto-match to invoices
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- Reconciliation matching
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3. **Payment Verification**
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- Confirm payment details (routing numbers, etc.)
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- Store payment references
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- Payment reconciliation workflow
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4. **Webhook Support**
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- Receive payment notifications
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- Auto-create payment records
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- Real-time reconciliation
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5. **Advanced Reporting**
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- Import history and audit trail
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- Failed transaction log
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- Reconciliation reports
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## Support & Questions
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For questions about implementation, refer to:
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1. **API_ENDPOINTS.md** - API specifications
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2. **IMPLEMENTATION_SUMMARY.md** - Technical details
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3. **FRONTEND_INTEGRATION_GUIDE.md** - Code examples
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4. **EXAMPLE_CSVs.md** - CSV format guide
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All code follows existing ERP platform patterns and conventions.
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