ระบบออกเอกสารใบเสร็จ-ใบกำกับภาษี

API Integration Guide

Option 1: JSON Data Export/Import

Export/Import data as JSON files to sync between systems:

Option 2: Daily Auto-Invoice Generation

Create a backend service (Node.js/Python) that:

1. Fetches yesterday's deliveries from your delivery app
2. Groups orders by customer
3. Calls this system's import API to create invoices
4. Can be scheduled daily using cron jobs

Option 3: Webhook Integration

Your delivery app can send webhook events when deliveries are completed:

// Example webhook payload from delivery app
POST /api/create-invoice
{
  "customerId": "C001",
  "date": "2025-02-13",
  "items": [
    {"productId": "P001", "quantity": 5},
    {"productId": "P002", "quantity": 3}
  ]
}

Sample Integration Code

Backend service example (Node.js):

// Fetch yesterday's deliveries and create invoices
const cron = require('node-cron');

cron.schedule('0 1 * * *', async () => {
  const yesterday = new Date();
  yesterday.setDate(yesterday.getDate() - 1);
  
  // Fetch from your delivery app
  const deliveries = await getDeliveries(yesterday);
  
  // Group by customer
  const byCustomer = groupByCustomer(deliveries);
  
  // Create invoice data
  const invoices = Object.keys(byCustomer).map(customerId => ({
    type: 'invoice',
    date: yesterday.toISOString().split('T')[0],
    customerId: customerId,
    items: byCustomer[customerId].items
  }));
  
  // Export as JSON for import
  fs.writeFileSync('daily-invoices.json', JSON.stringify(invoices));
});