Complete Tax-Free Invoice System
A Comprehensive Business Management Solution for Indian Businesses
Overview
The Tax-Free Invoice System is a complete business management solution designed specifically for Indian businesses operating under tax-free thresholds. This web-based application provides everything you need to manage invoices, track inventory, maintain customer databases, and analyze sales performance - all without requiring any server infrastructure or monthly subscriptions.
Key Features
Professional Invoice Generation
Create detailed invoices with HSN/SAC codes, multiple discount types, custom logos, and professional formatting. Supports various units of measurement and real-time calculations.
Comprehensive Stock Management
Track inventory levels, manage product details, monitor low stock alerts, and automatically update quantities when invoices are saved.
Customer Database
Maintain detailed customer records with contact information, purchase history, and automatic form population for repeat customers.
Sales Dashboard
Analyze business performance with revenue tracking, top-selling products, customer analytics, and customizable date ranges.
WhatsApp Integration
Send invoices directly via WhatsApp with customizable message templates and PDF sharing capabilities.
Data Backup & Restore
Complete data protection with JSON backup/restore functionality for all business data or individual components.
How to Use the System
Getting Started
- Setup: Save the HTML file to your computer and open it in any modern web browser
- Company Information: Enter your business details in the Invoice Generator section
- Logo Upload: Add your company logo and position it on invoices
- Initial Data: The system comes pre-loaded with sample inventory and customer data
Creating Your First Invoice
- Navigate to Invoice Generator: Click on the "Invoice Generator" tab
- Enter Customer Details: Start typing the customer's contact number - existing customers will auto-populate
- Add Items: Use "Browse Items" to select from inventory or manually enter item details
- Review & Generate: Click "Generate Invoice" to see the preview
- Save: Click "Save Invoice" to record the transaction and update inventory
Managing Inventory
- Access Stock Management: Click on the "Stock Management" tab
- Add New Items: Fill in item details including HSN codes, descriptions, and pricing
- Set Discounts: Configure percentage or fixed amount discounts
- Monitor Stock: Low stock items are highlighted in red for easy identification
- Edit/Delete: Use action buttons to modify or remove items
Customer Management
- Add Customers: Use the Customer Database section to add new customers
- View Purchase History: Click "View Purchases" to see customer transaction history
- Edit Information: Update customer details as needed
- Auto-Complete: Customer data automatically populates in invoice forms
Advanced Features
WhatsApp Integration
Send professional invoices directly via WhatsApp:
- Generate formatted text messages with invoice details
- Share PDF invoices directly through WhatsApp
- Customize message templates and description lengths
- Works on both desktop and mobile devices
Sales Analytics
The Sales Dashboard provides comprehensive business insights:
- Revenue tracking with customizable date ranges
- Top-selling products analysis
- Customer activity monitoring
- Discount impact analysis
- Recent orders overview
Data Management
Robust backup and restore capabilities:
- Complete system backup in JSON format
- Individual component backups (stock, customers, invoices)
- CSV export for invoices
- Easy data migration between devices
Technical Specifications
Built With Modern Web Technologies:
- Frontend: HTML5, CSS3, Vanilla JavaScript
- Database: Dexie.js (IndexedDB wrapper)
- PDF Generation: jsPDF with autoTable plugin
- Canvas Rendering: html2canvas for screenshot functionality
- Storage: Client-side IndexedDB (no server required)
Browser Compatibility
Works on all modern browsers including:
- Chrome 60+
- Firefox 55+
- Safari 12+
- Edge 79+
- Mobile browsers (iOS Safari, Chrome Mobile)
Security & Privacy
Data Privacy
All data is stored locally in your browser's IndexedDB. No information is sent to external servers, ensuring complete privacy and data ownership.
Security Features
- Local Storage: All data remains on your device
- Input Sanitization: Prevents XSS attacks through input cleaning
- No External Dependencies: All libraries loaded from trusted CDNs
- Offline Functionality: Works without internet connection
Best Practices
Data Backup
Important: Since data is stored locally, regular backups are essential. Browser data can be lost during updates, cache clearing, or system issues.
- Create weekly backups using the Backup & Restore section
- Store backup files in cloud storage or external drives
- Test restore functionality periodically
- Export invoices to CSV for accounting software integration
Invoice Management
- Use consistent HSN/SAC codes for proper tax compliance
- Regularly update customer information
- Monitor inventory levels to prevent overselling
- Maintain sequential invoice numbering
Performance Optimization
- Clear old invoices periodically to maintain performance
- Optimize logo images for faster loading
- Regular browser cache clearing if performance degrades
- Use modern browsers for best performance
Troubleshooting
Common Issues
Logo Not Displaying
Ensure image format is supported (PNG, JPG, GIF). Try smaller file sizes if upload fails.
PDF Generation Issues
Clear browser cache and ensure JavaScript is enabled. Try a different browser if issues persist.
WhatsApp Sharing Problems
Verify phone number format includes country code. Some browsers may block pop-ups.
Data Not Saving
Check if browser storage is enabled. Private browsing may prevent data persistence.
Future Enhancements
Potential improvements for future versions:
- Multi-currency support
- Advanced reporting and analytics
- Email integration
- Barcode/QR code generation
- Multi-language support
- Advanced inventory management features
- Customer loyalty program integration
Conclusion
The Tax-Free Invoice System provides a complete, professional solution for small to medium businesses in India. With its comprehensive feature set, user-friendly interface, and robust data management capabilities, it's an ideal choice for businesses looking to streamline their invoicing and inventory processes without the complexity and cost of traditional business software.
Getting Started
Simply save the HTML file to your computer, open it in your web browser, and start managing your business more efficiently today. No installation, no subscriptions, no complications.
Here is the code
Click or tap to cooy it
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Tax-Free Invoice System</title>
<!-- Libraries -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/html2canvas/1.4.1/html2canvas.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/2.5.1/jspdf.umd.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf-autotable/3.5.23/jspdf.plugin.autotable.min.js"></script>
<script src="https://unpkg.com/dexie@latest/dist/dexie.min.js"></script>
<style>
* { box-sizing: border-box; }
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
margin: 0;
padding: 20px;
background: #f5f5f5;
touch-action: manipulation;
}
.container { max-width: 1400px; margin: auto; }
.nav-menu {
background: linear-gradient(135deg, #007bff, #0056b3);
padding: 15px 20px;
margin-bottom: 20px;
border-radius: 8px;
box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
.nav-menu h2 {
color: white;
margin: 0 0 15px 0;
text-align: center;
}
.nav-buttons {
display: flex;
gap: 15px;
justify-content: center;
flex-wrap: wrap;
}
.nav-btn {
background: rgba(255,255,255,0.2);
color: white;
border: 2px solid rgba(255,255,255,0.3);
padding: 12px 24px;
border-radius: 6px;
cursor: pointer;
font-weight: bold;
transition: all 0.3s;
backdrop-filter: blur(10px);
}
.nav-btn:hover {
background: rgba(255,255,255,0.3);
transform: translateY(-2px);
}
.nav-btn.active {
background: white;
color: #007bff;
border-color: white;
}
.section { display: none; }
.section.active { display: block; }
.input-section {
background: white;
padding: 20px;
margin-bottom: 20px;
border-radius: 8px;
box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
.invoice-preview {
background: white;
padding: 0;
border-radius: 8px;
box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
h3 { margin-top: 0; color: #333; border-bottom: 2px solid #007bff; padding-bottom: 10px; }
.form-row { display: flex; gap: 15px; margin-bottom: 15px; flex-wrap: wrap; }
.form-group { flex: 1; min-width: 200px; position: relative; }
.form-group label { display: block; margin-bottom: 5px; font-weight: bold; color: #555; }
.form-group input, .form-group textarea, .form-group select {
width: 100%;
padding: 10px;
border: 1px solid #ddd;
border-radius: 4px;
font-size: 14px;
}
.form-group textarea { resize: vertical; height: 80px; }
.auto-populated {
background-color: #e8f5e8 !important;
border-color: #28a745 !important;
transition: background-color 0.5s ease;
}
.dropdown {
position: absolute;
top: 100%;
left: 0;
right: 0;
background: white;
border: 1px solid #ddd;
border-top: none;
max-height: 200px;
overflow-y: auto;
z-index: 1000;
display: none;
box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
.dropdown-item {
padding: 10px;
cursor: pointer;
border-bottom: 1px solid #eee;
}
.dropdown-item:hover {
background: #f5f5f5;
}
.items-section { margin-top: 20px; }
.items-table {
width: 100%;
border-collapse: collapse;
background: #f8f9fa;
border-radius: 5px;
overflow: hidden;
}
.items-table th, .items-table td {
padding: 10px;
border: 1px solid #ddd;
text-align: left;
font-size: 14px;
}
.items-table th {
background: #e9ecef;
font-weight: bold;
color: #333;
}
.items-table input, .items-table select {
width: 100%;
padding: 8px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 14px;
}
.items-table .code-input { min-width: 100px; }
.items-table .desc-input { min-width: 200px; }
.items-table .qty-input, .items-table .rate-input, .items-table .total-input { min-width: 80px; }
.items-table .disc-type-select { min-width: 60px; }
.items-table .disc-input { min-width: 80px; }
.items-table .unit-select { min-width: 80px; }
.items-table .total-input {
background: #f0f0f0;
text-align: right;
pointer-events: none;
}
.items-table .remove-btn {
background: #dc3545;
color: white;
border: none;
padding: 8px 12px;
border-radius: 4px;
cursor: pointer;
width: 100%;
}
.items-table .remove-btn:hover { background: #c82333; }
.add-item-btn, .generate-btn, .browse-items-btn, .add-stock-btn, .add-customer-btn,
.backup-btn, .restore-btn, .save-btn, .export-csv-btn, .view-purchases-btn {
background: #28a745;
color: white;
border: none;
padding: 12px 20px;
border-radius: 5px;
cursor: pointer;
margin-right: 10px;
margin-top: 10px;
font-weight: bold;
transition: all 0.3s;
}
.add-item-btn:hover, .add-stock-btn:hover, .add-customer-btn:hover,
.backup-btn:hover, .restore-btn:hover, .save-btn:hover, .export-csv-btn:hover,
.view-purchases-btn:hover {
background: #218838;
transform: translateY(-2px);
}
.browse-items-btn { background: #17a2b8; }
.browse-items-btn:hover { background: #138496; }
.generate-btn { background: #007bff; }
.generate-btn:hover { background: #0056b3; }
.save-btn { background: #ffc107; color: #333; }
.save-btn:hover { background: #e0a800; }
.export-csv-btn { background: #17a2b8; }
.export-csv-btn:hover { background: #138496; }
.view-purchases-btn { background: #6c757d; }
.view-purchases-btn:hover { background: #5a6268; }
.stock-table, .customer-table, .purchase-history-table {
width: 100%;
border-collapse: collapse;
margin-top: 20px;
}
.stock-table th, .stock-table td, .customer-table th, .customer-table td,
.purchase-history-table th, .purchase-history-table td {
border: 1px solid #ddd;
padding: 12px;
text-align: left;
}
.stock-table th, .customer-table th, .purchase-history-table th {
background: #f8f9fa;
font-weight: bold;
}
.stock-table tr:hover, .customer-table tr:hover, .purchase-history-table tr:hover {
background: #f5f5f5;
}
.edit-btn, .delete-btn {
padding: 6px 12px;
margin: 2px;
border: none;
border-radius: 3px;
cursor: pointer;
font-size: 12px;
}
.edit-btn { background: #ffc107; color: #333; }
.edit-btn:hover { background: #e0a800; }
.delete-btn { background: #dc3545; color: white; }
.delete-btn:hover { background: #c82333; }
.low-stock {
color: #dc3545;
font-weight: bold;
}
.quantity-error, .disc-error {
border: 2px solid #dc3545 !important;
background-color: #fff3f3 !important;
}
.invoice-box {
max-width: 700px;
margin: auto;
padding: 20px;
border: 1px solid #ddd;
border-radius: 8px;
background: white;
position: relative;
}
.company-header {
text-align: center;
margin-bottom: 20px;
}
.company-header h2 { margin: 0; color: #333; }
.company-header p { margin: 2px 0; font-size: 13px; color: #666; }
.header { display: flex; justify-content: space-between; margin-bottom: 20px; }
.bill-to { font-size: 14px; }
.invoice-details { text-align: right; font-size: 14px; }
.invoice-table {
width: 100%;
border-collapse: collapse;
margin-top: 20px;
}
.invoice-table, .invoice-table th, .invoice-table td { border: 1px solid #ccc; }
.invoice-table th, .invoice-table td { padding: 8px; text-align: left; }
.invoice-table th { background: #f8f9fa; }
.total { text-align: right; font-weight: bold; margin-top: 10px; font-size: 16px; }
.print-btn {
margin-top: 20px;
padding: 10px 20px;
background: #007bff;
color: #fff;
border: none;
cursor: pointer;
border-radius: 5px;
font-weight: bold;
}
.print-btn:hover { background: #0056b3; }
.invoice-logo {
position: absolute;
top: 20px;
left: 20px;
z-index: 10;
cursor: move;
user-select: none;
-webkit-user-select: none;
touch-action: none;
}
.invoice-logo img {
width: 100%;
height: 100%;
object-fit: contain;
}
.invoice-logo.active {
border: 2px dashed #007bff;
}
.resize-handle {
position: absolute;
width: 12px;
height: 12px;
background: #007bff;
border-radius: 50%;
display: none;
}
.invoice-logo.active .resize-handle {
display: block;
}
.resize-handle.top-left {
top: -6px;
left: -6px;
cursor: nwse-resize;
}
.resize-handle.top-right {
top: -6px;
right: -6px;
cursor: nesw-resize;
}
.resize-handle.bottom-left {
bottom: -6px;
left: -6px;
cursor: nesw-resize;
}
.resize-handle.bottom-right {
bottom: -6px;
right: -6px;
cursor: nwse-resize;
}
.logo-controls {
margin-top: 20px;
display: flex;
flex-wrap: wrap;
gap: 10px;
align-items: center;
}
.logo-controls input[type="number"] {
width: 80px;
padding: 6px;
border: 1px solid #ddd;
border-radius: 4px;
}
.logo-controls button {
padding: 8px 16px;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 14px;
}
.reset-logo-btn {
background: #6c757d;
color: white;
}
.reset-logo-btn:hover {
background: #5a6268;
}
.remove-logo-btn {
background: #dc3545;
color: white;
}
.remove-logo-btn:hover {
background: #c82333;
}
.dialog-overlay {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
background: rgba(0, 0, 0, 0.5);
z-index: 1000;
display: none;
align-items: center;
justify-content: center;
}
.dialog {
background: white;
border-radius: 12px;
padding: 0;
width: 90%;
max-width: 600px;
min-width: 300px;
max-height: 80vh;
min-height: 200px;
overflow: hidden;
box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
position: relative;
}
.dialog-header {
display: flex;
justify-content: space-between;
align-items: center;
padding: 15px 20px 10px 20px;
border-bottom: 2px solid #e9ecef;
background: #f8f9fa;
-webkit-user-select: none;
user-select: none;
touch-action: none;
}
.dialog-controls {
display: flex;
align-items: center;
gap: 10px;
flex-wrap: wrap;
}
.size-inputs {
display: flex;
gap: 5px;
align-items: center;
margin-right: 10px;
}
.size-input {
width: 60px;
padding: 2px 5px;
border: 1px solid #ddd;
border-radius: 3px;
font-size: 0.8rem;
text-align: center;
}
.resize-btn, .apply-btn {
border: none;
padding: 4px 8px;
border-radius: 4px;
cursor: pointer;
font-size: 0.8rem;
}
.resize-btn {
background: #6c757d;
color: white;
font-weight: 600;
}
.resize-btn:hover { background: #5a6268; }
.apply-btn { background: #007bff; color: white; }
.apply-btn:hover { background: #0056b3; }
.dialog-header h3 { color: #495057; margin: 0; border: none; }
.close-btn {
background: none;
border: none;
font-size: 1.5rem;
cursor: pointer;
color: #6c757d;
padding: 5px;
border-radius: 50%;
width: 35px;
height: 35px;
display: flex;
align-items: center;
justify-content: center;
}
.close-btn:hover { background: #f8f9fa; color: #495057; }
.search-section { margin-bottom: 20px; padding: 0 20px; }
.search-input {
width: 100%;
padding: 12px;
border: 2px solid #dee2e6;
border-radius: 8px;
font-size: 1rem;
}
.search-input:focus {
outline: none;
border-color: #4facfe;
box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.1);
}
.items-container, .purchase-history-container {
max-height: calc(100% - 150px);
overflow-y: auto;
border: 1px solid #dee2e6;
border-radius: 8px;
margin: 0 20px 20px 20px;
}
.item-table, .purchase-history-table {
width: 100%;
border-collapse: collapse;
}
.item-table th, .item-table td, .purchase-history-table th, .purchase-history-table td {
padding: 10px;
text-align: left;
border-bottom: 1px solid #dee2e6;
}
.item-table th, .purchase-history-table th {
background: #f8f9fa;
position: sticky;
top: 0;
font-weight: 600;
color: #495057;
}
.item-table tbody tr, .purchase-history-table tbody tr {
cursor: pointer;
transition: background-color 0.2s ease;
}
.item-table tbody tr:hover, .purchase-history-table tbody tr:hover {
background-color: #e3f2fd;
}
.status-message {
padding: 10px;
margin: 10px 20px;
border-radius: 6px;
font-size: 0.9rem;
display: none;
}
.status-success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.status-error { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
@media print {
body { background: white; }
.input-section, .nav-menu { display: none; }
.invoice-preview { box-shadow: none; }
.dialog-overlay { display: none !important; }
.invoice-logo.active { border: none !important; }
.resize-handle { display: none !important; }
}
@media (max-width: 768px) {
.form-row { flex-direction: column; }
.items-section, .stock-table, .customer-table, .purchase-history-table {
overflow-x: auto;
display: block;
}
.items-table th, .items-table td { min-width: 60px; }
.items-table .desc-input { min-width: 120px; }
.items-table .remove-btn { min-width: 80px; }
.dialog { width: 90%; min-width: 250px; max-width: 95vw; }
.dialog-header { padding: 10px 15px; }
.size-input { width: 50px; font-size: 0.7rem; }
.resize-btn, .apply-btn { padding: 3px 6px; font-size: 0.7rem; }
.nav-buttons { flex-direction: column; align-items: center; }
.nav-btn { width: 200px; }
.logo-controls input[type="number"] { width: 60px; }
}
@media (max-width: 480px) {
.dialog { min-height: 150px; }
.items-container, .purchase-history-container { max-height: calc(100% - 120px); }
.items-table th, .items-table td, .stock-table th, .stock-table td,
.customer-table th, .customer-table td, .purchase-history-table th, .purchase-history-table td {
font-size: 12px;
padding: 6px;
}
.items-table input, .items-table select { font-size: 12px; padding: 4px; }
.item-table th, .item-table td, .purchase-history-table th, .purchase-history-table td {
font-size: 12px; padding: 6px;
}
.resize-handle { width: 10px; height: 10px; }
}
.hidden { display: none; }
.whatsapp-section {
background: #e8f5e8;
padding: 15px;
border-radius: 5px;
margin-top: 20px;
border-left: 4px solid #25d366;
}
.whatsapp-section h3 {
color: #333;
border-bottom: 2px solid #25d366;
}
.btn-whatsapp {
background: #25d366;
color: white;
padding: 10px 20px;
border: none;
border-radius: 5px;
cursor: pointer;
font-weight: bold;
transition: all 0.3s;
}
.btn-whatsapp:hover {
background: #20c360;
transform: translateY(-2px);
}
.whatsapp-preview {
max-height: 200px;
overflow-y: auto;
border: 1px solid #ddd;
margin-top: 15px;
padding: 10px;
background: #f8f9fa;
border-radius: 4px;
white-space: pre-wrap;
font-family: monospace;
display: none;
}
.pdf-btn {
background: #007bff;
color: white;
padding: 10px 20px;
border: none;
border-radius: 5px;
cursor: pointer;
margin-right: 10px;
margin-top: 10px;
}
.pdf-btn:hover {
background: #0056b3;
}
.pdf-btn.share {
background: linear-gradient(135deg, #17a2b8, #20c997);
}
.stats-grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
gap: 20px;
margin-bottom: 20px;
}
.dashboard-grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
gap: 20px;
}
.dashboard-card {
background: white;
padding: 20px;
border-radius: 8px;
box-shadow: 0 2px 5px rgba(0,0,0,0.1);
transition: transform 0.3s, box-shadow 0.3s;
}
.dashboard-card:hover {
transform: translateY(-5px);
box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}
.dashboard-card h4 {
margin: 0 0 10px;
color: #333;
font-size: 1.1rem;
}
.dashboard-card p {
margin: 0;
font-size: 1.5rem;
font-weight: bold;
color: white;
}
.top-products-list, .recent-orders-list {
max-height: 200px;
overflow-y: auto;
margin-top: 10px;
}
.top-products-list div, .recent-orders-list div {
padding: 10px;
border-bottom: 1px solid #eee;
display: flex;
justify-content: space-between;
align-items: center;
cursor: pointer;
transition: background 0.2s;
}
.top-products-list div:hover, .recent-orders-list div:hover {
background: #f5f5f5;
}
.refresh-btn {
background: #007bff;
color: white;
border: none;
padding: 10px 20px;
border-radius: 5px;
cursor: pointer;
margin-top: 10px;
}
.refresh-btn:hover {
background: #0056b3;
}
@media (max-width: 768px) {
.stats-grid, .dashboard-grid {
grid-template-columns: 1fr;
}
}
</style>
</head>
<body>
<div class="container">
<!-- Navigation Menu -->
<div class="nav-menu">
<h2>🇮🇳 Tax-Free Invoice System</h2>
<div class="nav-buttons">
<button class="nav-btn active" data-section="invoice">📋 Invoice Generator</button>
<button class="nav-btn" data-section="dashboard">📊 Sales Dashboard</button>
<button class="nav-btn" data-section="stock">📦 Stock Management</button>
<button class="nav-btn" data-section="customers">👥 Customer Database</button>
<button class="nav-btn" data-section="backup-restore">💾 Backup & Restore</button>
</div>
</div>
<!-- Sales Dashboard Section -->
<div class="section" id="dashboard">
<div class="input-section">
<h3>📊 Sales Dashboard</h3>
<div class="form-row">
<div class="form-group">
<label>Date Range</label>
<select id="dateRangeFilter" onchange="toggleCustomDateRange()">
<option value="7">Last 7 days</option>
<option value="30">Last 30 days</option>
<option value="90">Last 90 days</option>
<option value="365">Last 365 days</option>
<option value="custom">Custom Range</option>
</select>
</div>
<div class="form-group hidden" id="customDateRange">
<label>From</label>
<input type="date" id="fromDate">
<label>To</label>
<input type="date" id="toDate">
</div>
<div class="form-group">
<button class="refresh-btn" onclick="updateDashboard()">Refresh</button>
<button class="refresh-btn" onclick="clearInvoices()">Clear Invoices</button>
</div>
</div>
<div class="stats-grid">
<div class="dashboard-card" style="background: linear-gradient(135deg, #28a745, #218838);">
<h4>Total Revenue</h4>
<p id="totalRevenue">₹0.00</p>
</div>
<div class="dashboard-card" style="background: linear-gradient(135deg, #007bff, #0056b3);">
<h4>Total Orders</h4>
<p id="totalOrders">0</p>
</div>
<div class="dashboard-card" style="background: linear-gradient(135deg, #ff4d4f, #cf1322);">
<h4>Active Customers</h4>
<p id="totalCustomers">0</p>
</div>
<div class="dashboard-card" style="background: linear-gradient(135deg, #17a2b8, #117a8b);">
<h4>Products Sold</h4>
<p id="totalProducts">0</p>
</div>
<div class="dashboard-card" style="background: linear-gradient(135deg, #ffc107, #e0a800);">
<h4>Total Discounts</h4>
<p id="totalDiscount">₹0.00</p>
</div>
</div>
<div class="dashboard-grid">
<div class="dashboard-card">
<h4>Top Selling Products</h4>
<div class="top-products-list" id="topProductsList"></div>
</div>
<div class="dashboard-card">
<h4>Recent Orders</h4>
<div class="recent-orders-list" id="recentOrdersList"></div>
</div>
</div>
</div>
</div>
<!-- Invoice Generator Section -->
<div class="section active" id="invoice">
<div class="input-section">
<h3>📝 Invoice Generator</h3>
<!-- Company Info -->
<div class="form-row">
<div class="form-group">
<label>Company Name</label>
<input type="text" id="companyName" value="Your Company Name">
</div>
</div>
<div class="form-row">
<div class="form-group">
<label>Company Address</label>
<textarea id="companyAddress">123 Business Street, City, State - ZIP</textarea>
</div>
<div class="form-group">
<label>Contact Info</label>
<textarea id="companyContact">Email: info@company.com
Phone: +91 9037393709</textarea>
</div>
</div>
<!-- Logo Upload -->
<h3>🖼️ Logo</h3>
<div class="form-row">
<div class="form-group">
<label>Upload Logo</label>
<input type="file" id="logoUpload" accept="image/*">
</div>
<div class="form-group logo-controls">
<label>Width (px)</label>
<input type="number" id="logoWidth" min="20" max="300" placeholder="Width">
<label>Height (px)</label>
<input type="number" id="logoHeight" min="20" max="300" placeholder="Height">
<label><input type="checkbox" id="lockAspectRatio" checked> Lock Aspect Ratio</label>
<button class="reset-logo-btn" onclick="resetLogoPosition()">Reset Position</button>
<button class="remove-logo-btn" onclick="removeLogo()">Remove Logo</button>
</div>
</div>
<p style="font-size: 12px; color: #666;">Tip: Tap logo to show handles, drag to move, or tap handles to resize. Double-tap logo to hide handles.</p>
<!-- Bill To -->
<h3>👤 Bill To</h3>
<div class="form-row">
<div class="form-group">
<label>Client Contact Number</label>
<input type="text" id="clientContact" placeholder="Enter contact number">
<div class="dropdown" id="contactDropdown"></div>
</div>
<div class="form-group">
<label>Client Name</label>
<input type="text" id="clientName" placeholder="Name will auto-populate">
</div>
</div>
<div class="form-row">
<div class="form-group">
<label>Client Email</label>
<input type="email" id="clientEmail" placeholder="Email will auto-populate">
</div>
<div class="form-group">
<label>Client Address</label>
<textarea id="clientAddress" placeholder="Address will auto-populate"></textarea>
</div>
</div>
<!-- Invoice Details -->
<h3>📋 Invoice Details</h3>
<div class="form-row">
<div class="form-group">
<label>Invoice Number</label>
<input type="text" id="invoiceNumber" value="INV-001">
</div>
<div class="form-group">
<label>Invoice Date</label>
<input type="date" id="invoiceDate">
</div>
<div class="form-group">
<label>Due Date</label>
<input type="date" id="dueDate">
</div>
</div>
<!-- Items Section -->
<h3>📦 Items</h3>
<div class="items-section">
<table class="items-table" id="itemsList">
<thead>
<tr>
<th>HSN/SAC Code</th>
<th>Description</th>
<th>Unit</th>
<th>Qty</th>
<th>Rate (₹)</th>
<th>Disc Type</th>
<th>Discount</th>
<th>Total (₹)</th>
<th>Action</th>
</tr>
</thead>
<tbody>
<tr class="item-row">
<td><input type="text" class="item-code code-input" placeholder="Enter HSN/SAC code..."><div class="dropdown item-dropdown"></div></td>
<td><input type="text" class="item-desc desc-input" placeholder="Service or product description"></td>
<td><select class="item-unit unit-select"><option value="PCS">PCS</option><option value="KG">KG</option><option value="LTR">LTR</option><option value="MTR">MTR</option><option value="BOX">BOX</option><option value="SET">SET</option></select></td>
<td><input type="number" class="item-qty qty-input" value="1" min="1"></td>
<td><input type="number" class="item-rate rate-input" value="0" step="0.01" min="0"></td>
<td>
<select class="disc-type-select">
<option value="percent">%</option>
<option value="amount">₹</option>
</select>
</td>
<td><input type="number" class="item-disc disc-input" value="0" step="0.01" min="0"></td>
<td><input type="text" class="item-total total-input" value="0.00" readonly></td>
<td><button class="remove-btn" onclick="removeItem(this)">Remove</button></td>
</tr>
</tbody>
</table>
<button class="add-item-btn" onclick="addItem()">+ Add Item</button>
<button class="browse-items-btn" onclick="openItemDialog()">📋 Browse Items</button>
<button class="generate-btn" onclick="updateItemTotals()">Generate Invoice</button>
<button class="save-btn" onclick="saveInvoice()">Save Invoice</button>
</div>
<!-- WhatsApp Section -->
<div class="whatsapp-section">
<h3>Send Invoice via WhatsApp</h3>
<div class="form-row">
<div class="form-group">
<label>WhatsApp Number</label>
<input type="text" id="whatsappNumber" placeholder="Enter phone number (e.g., +919037393709)">
</div>
<div class="form-group">
<label>Max Description Length</label>
<input type="number" id="whatsappDescLength" value="20" min="10" max="50">
</div>
</div>
<button class="btn-whatsapp" onclick="generateWhatsAppMessage()">Preview WhatsApp Message</button>
<div class="whatsapp-preview" id="whatsappPreview" style="display: none;"></div>
<button class="btn-whatsapp" style="margin-top: 10px;" onclick="sendWhatsApp()">Send via WhatsApp</button>
</div>
<div class="pdf-buttons">
<button class="pdf-btn download" onclick="generatePDF()">Download PDF</button>
<button class="pdf-btn share" onclick="sharePDF()">Share PDF via WhatsApp</button>
<button class="pdf-btn print" onclick="printInvoice()">Print Invoice</button>
</div>
</div>
<!-- Invoice Preview -->
<div class="invoice-preview" id="invoicePreview">
<div class="invoice-box">
<div class="company-header">
<h2 id="previewCompanyName">Your Company Name</h2>
<p id="previewCompanyAddress">123 Business Street, City, State - ZIP</p>
<p id="previewCompanyContact">Email: info@company.com | Phone: +91 9037393709</p>
</div>
<div class="header">
<div class="bill-to">
<b>Bill To</b><br>
<span id="previewClientName">Customer Name</span><br>
<span id="previewClientAddress">Customer Address</span><br>
Contact: <span id="previewClientContact">Customer Contact</span><br>
Email: <span id="previewClientEmail">Customer Email</span>
</div>
<div class="invoice-details">
<b style="color:red;">INVOICE</b><br>
Invoice #: <span id="previewInvoiceNumber">INV-001</span><br>
Invoice Date: <span id="previewInvoiceDate">27 August 2025</span><br>
Due Date: <span id="previewDueDate">26 September 2025</span>
</div>
</div>
<table class="invoice-table">
<thead>
<tr>
<th>Code</th>
<th>Description</th>
<th>Unit</th>
<th>Qty</th>
<th>Rate</th>
<th>Discount</th>
<th>Total</th>
</tr>
</thead>
<tbody id="previewItems">
<tr>
<td></td>
<td>Sample Item</td>
<td>PCS</td>
<td>1</td>
<td>₹0.00</td>
<td>0%</td>
<td>₹0.00</td>
</tr>
</tbody>
</table>
<p class="total">Grand Total: <span id="previewTotal">₹0.00</span></p>
<button class="print-btn" onclick="window.print()">Print / Save as PDF</button>
</div>
</div>
</div>
<!-- Stock Management Section -->
<div class="section" id="stock">
<div class="input-section">
<h3>📦 Stock Management</h3>
<div class="form-row">
<div class="form-group">
<label>Item Code</label>
<input type="text" id="stockCode" placeholder="e.g., ITM001">
</div>
<div class="form-group">
<label>HSN/SAC Code</label>
<input type="text" id="stockHSN" placeholder="e.g., 8471">
</div>
<div class="form-group">
<label>Description</label>
<input type="text" id="stockDescription" placeholder="e.g., Ergonomic wireless mouse">
</div>
</div>
<div class="form-row">
<div class="form-group">
<label>Rate (₹)</label>
<input type="number" id="stockPrice" placeholder="e.g., 25.99" step="0.01" min="0">
</div>
<div class="form-group">
<label>Unit of Measurement</label>
<select id="stockUnit">
<option value="PCS">PCS - Pieces</option>
<option value="KG">KG - Kilogram</option>
<option value="LTR">LTR - Liter</option>
<option value="MTR">MTR - Meter</option>
<option value="BOX">BOX - Box</option>
<option value="SET">SET - Set</option>
</select>
</div>
<div class="form-group">
<label>Quantity</label>
<input type="number" id="stockQuantity" min="0" placeholder="Enter quantity">
</div>
</div>
<div class="form-row">
<div class="form-group">
<label>Discount Type</label>
<select id="stockDiscountType">
<option value="percent">%</option>
<option value="amount">₹</option>
</select>
</div>
<div class="form-group">
<label>Discount</label>
<input type="number" id="stockDiscount" value="0" step="0.01" min="0">
</div>
</div>
<button class="add-stock-btn" onclick="addStockItem()">Add to Inventory</button>
<table class="stock-table" id="stockTable">
<thead>
<tr>
<th>Item Code</th>
<th>HSN/SAC</th>
<th>Description</th>
<th>Rate (₹)</th>
<th>Unit</th>
<th>Discount</th>
<th>Quantity</th>
<th>Actions</th>
</tr>
</thead>
<tbody id="stockTableBody">
</tbody>
</table>
</div>
</div>
<!-- Customer Database Section -->
<div class="section" id="customers">
<div class="input-section">
<h3>👥 Customer Database</h3>
<div class="form-row">
<div class="form-group">
<label>Contact Number</label>
<input type="text" id="newCustomerContact" placeholder="Enter contact number">
</div>
<div class="form-group">
<label>Customer Name</label>
<input type="text" id="newCustomerName" placeholder="Enter customer name">
</div>
<div class="form-group">
<label>Email</label>
<input type="email" id="newCustomerEmail" placeholder="Enter email">
</div>
</div>
<div class="form-row">
<div class="form-group">
<label>Address</label>
<textarea id="newCustomerAddress" placeholder="Enter address"></textarea>
</div>
</div>
<button class="add-customer-btn" onclick="addCustomer()">+ Add Customer</button>
<table class="customer-table" id="customerTable">
<thead>
<tr>
<th>Contact</th>
<th>Name</th>
<th>Email</th>
<th>Address</th>
<th>Actions</th>
</tr>
</thead>
<tbody id="customerTableBody">
</tbody>
</table>
</div>
</div>
<!-- Backup & Restore Section -->
<div class="section" id="backup-restore">
<div class="input-section">
<h3>💾 Backup & Restore</h3>
<div class="form-row">
<div class="form-group">
<label>Backup All Data</label>
<button class="backup-btn" onclick="backupData()">Backup Data to JSON</button>
</div>
<div class="form-group">
<label>Restore All Data</label>
<input type="file" id="restoreFileInput" accept=".json">
<button class="restore-btn" onclick="restoreData()">Restore Data</button>
</div>
</div>
<div class="form-row">
<div class="form-group">
<label>Backup Stock Data Only</label>
<button class="backup-btn" onclick="backupStockData()">Backup Stock to JSON</button>
</div>
<div class="form-group">
<label>Restore Stock Data Only</label>
<input type="file" id="restoreStockFileInput" accept=".json">
<button class="restore-btn" onclick="restoreStockData()">Restore Stock Data</button>
</div>
</div>
<div class="form-row">
<div class="form-group">
<label>Backup Customer Data Only</label>
<button class="backup-btn" onclick="backupCustomerData()">Backup Customers to JSON</button>
</div>
<div class="form-group">
<label>Restore Customer Data Only</label>
<input type="file" id="restoreCustomerFileInput" accept=".json">
<button class="restore-btn" onclick="restoreCustomerData()">Restore Customer Data</button>
</div>
</div>
<div class="form-row">
<div class="form-group">
<label>Export Invoices</label>
<button class="export-csv-btn" onclick="exportInvoicesToCSV()">Export Invoices to CSV</button>
</div>
</div>
<div class="status-message" id="backupStatusMessage"></div>
</div>
</div>
</div>
<!-- Item Selection Dialog -->
<div class="dialog-overlay" id="dialogOverlay" onclick="closeDialog(event, 'dialogOverlay')">
<div class="dialog" id="itemDialog" onclick="event.stopPropagation()">
<div class="dialog-header">
<h3>Select Items</h3>
<div class="dialog-controls">
<div class="size-inputs">
<span style="font-size: 0.8rem;">W:</span>
<input type="number" class="size-input" id="itemWidthInput" value="600" min="300" max="1200">
<span style="font-size: 0.8rem;">H:</span>
<input type="number" class="size-input" id="itemHeightInput" value="450" min="200" max="800">
<button class="apply-btn" onclick="applyCustomSize('itemDialog', 'itemWidthInput', 'itemHeightInput')">Apply</button>
</div>
<div class="resize-controls">
<button class="resize-btn" onclick="quickResize(400, 250, 'itemDialog', 'itemWidthInput', 'itemHeightInput')" title="Compact">XS</button>
<button class="resize-btn" onclick="quickResize(500, 350, 'itemDialog', 'itemWidthInput', 'itemHeightInput')" title="Small">S</button>
<button class="resize-btn" onclick="quickResize(700, 500, 'itemDialog', 'itemWidthInput', 'itemHeightInput')" title="Large">L</button>
</div>
<button class="close-btn" onclick="closeDialog(null, 'dialogOverlay')">×</button>
</div>
</div>
<div class="search-section">
<input type="text" class="search-input" id="searchInput" placeholder="Search items by code, name, or description..." oninput="searchItems()">
</div>
<div class="status-message" id="statusMessage"></div>
<div class="items-container">
<table class="item-table">
<thead>
<tr>
<th>Code</th>
<th>Name</th>
<th>Description</th>
<th>Price</th>
<th>Discount</th>
</tr>
</thead>
<tbody id="itemsList2">
</tbody>
</table>
</div>
</div>
</div>
<!-- Edit Customer Dialog -->
<div class="dialog-overlay" id="editCustomerDialogOverlay" onclick="closeDialog(event, 'editCustomerDialogOverlay')">
<div class="dialog" id="editCustomerDialog" onclick="event.stopPropagation()">
<div class="dialog-header">
<h3>Edit Customer</h3>
<button class="close-btn" onclick="closeDialog(null, 'editCustomerDialogOverlay')">×</button>
</div>
<div class="form-row" style="padding: 20px;">
<div class="form-group">
<label>Contact Number</label>
<input type="text" id="editCustomerContact" placeholder="Enter contact number">
</div>
<div class="form-group">
<label>Customer Name</label>
<input type="text" id="editCustomerName" placeholder="Enter customer name">
</div>
<div class="form-group">
<label>Email</label>
<input type="email" id="editCustomerEmail" placeholder="Enter email">
</div>
<div class="form-group">
<label>Address</label>
<textarea id="editCustomerAddress" placeholder="Enter address"></textarea>
</div>
</div>
<div style="padding: 0 20px 20px;">
<button class="add-customer-btn" onclick="saveEditedCustomer()">Save Changes</button>
</div>
</div>
</div>
<!-- Purchase History Dialog -->
<div class="dialog-overlay" id="purchaseHistoryDialogOverlay" onclick="closeDialog(event, 'purchaseHistoryDialogOverlay')">
<div class="dialog" id="purchaseHistoryDialog" onclick="event.stopPropagation()">
<div class="dialog-header">
<h3>Purchase History</h3>
<div class="dialog-controls">
<div class="size-inputs">
<span style="font-size: 0.8rem;">W:</span>
<input type="number" class="size-input" id="purchaseWidthInput" value="600" min="300" max="1200">
<span style="font-size: 0.8rem;">H:</span>
<input type="number" class="size-input" id="purchaseHeightInput" value="450" min="200" max="800">
<button class="apply-btn" onclick="applyCustomSize('purchaseHistoryDialog', 'purchaseWidthInput', 'purchaseHeightInput')">Apply</button>
</div>
<div class="resize-controls">
<button class="resize-btn" onclick="quickResize(400, 250, 'purchaseHistoryDialog', 'purchaseWidthInput', 'purchaseHeightInput')" title="Compact">XS</button>
<button class="resize-btn" onclick="quickResize(500, 350, 'purchaseHistoryDialog', 'purchaseWidthInput', 'purchaseHeightInput')" title="Small">S</button>
<button class="resize-btn" onclick="quickResize(700, 500, 'purchaseHistoryDialog', 'purchaseWidthInput', 'purchaseHeightInput')" title="Large">L</button>
</div>
<button class="close-btn" onclick="closeDialog(null, 'purchaseHistoryDialogOverlay')">×</button>
</div>
</div>
<div class="status-message" id="purchaseStatusMessage"></div>
<div class="purchase-history-container">
<table class="purchase-history-table">
<thead>
<tr>
<th>Invoice Number</th>
<th>Date</th>
<th>Total (₹)</th>
<th>Items</th>
</tr>
</thead>
<tbody id="purchaseHistoryList">
</tbody>
</table>
</div>
</div>
</div>
<script>
// Initialize Dexie.js database
const db = new Dexie('InvoiceDB');
db.version(1).stores({
invoices: 'invoiceNumber,clientContact,timestamp',
inventory: 'code,hsn,description',
customers: 'contact,name'
});
// Default data for initial population
const defaultInventory = [
{ code: 'ITM001', hsn: '8471', name: 'Wireless Mouse', description: 'Ergonomic wireless mouse with USB receiver', price: 25.99, unit: 'PCS', quantity: 50, discountType: 'percent', discount: 5 },
{ code: 'ITM002', hsn: '8471', name: 'Keyboard', description: 'Mechanical gaming keyboard with RGB lighting', price: 89.99, unit: 'PCS', quantity: 30, discountType: 'amount', discount: 10 },
{ code: 'ITM003', hsn: '9403', name: 'Monitor Stand', description: 'Adjustable aluminum monitor stand', price: 45.00, unit: 'PCS', quantity: 20, discountType: 'percent', discount: 0 },
{ code: 'ITM004', hsn: '8544', name: 'USB Cable', description: '6ft USB-C to USB-A cable', price: 12.50, unit: 'PCS', quantity: 100, discountType: 'amount', discount: 2.50 },
{ code: 'ITM005', hsn: '8525', name: 'Webcam', description: '1080p HD webcam with built-in microphone', price: 67.99, unit: 'PCS', quantity: 15, discountType: 'percent', discount: 10 }
];
const defaultCustomers = [
{ contact: '+919037393709', name: 'John Doe', email: 'john@example.com', address: '123 Main St, City' },
{ contact: '+919876543210', name: 'Jane Smith', email: 'jane@example.com', address: '456 Park Ave, City' }
];
// Global variables
let inventory = [];
let customerDatabase = [];
let invoices = [];
let filteredInventory = [];
let editingCustomerContact = null;
// Migrate localStorage data to IndexedDB
async function migrateLocalStorageToIndexedDB() {
try {
const invoiceCount = await db.invoices.count();
if (invoiceCount > 0) return; // Skip migration if IndexedDB already has data
const localInventory = JSON.parse(localStorage.getItem('inventory'));
const localCustomers = JSON.parse(localStorage.getItem('customerDatabase'));
const localInvoices = JSON.parse(localStorage.getItem('invoices'));
if (localInventory && localInventory.length > 0) {
await db.inventory.bulkPut(localInventory);
} else {
await db.inventory.bulkPut(defaultInventory);
}
if (localCustomers && localCustomers.length > 0) {
await db.customers.bulkPut(localCustomers);
} else {
await db.customers.bulkPut(defaultCustomers);
}
if (localInvoices && localInvoices.length > 0) {
await db.invoices.bulkPut(localInvoices);
}
// Clear localStorage after migration
localStorage.removeItem('inventory');
localStorage.removeItem('customerDatabase');
localStorage.removeItem('invoices');
} catch (error) {
showStatus('Error migrating data to IndexedDB: ' + error.message, 'error');
}
}
// Load data from IndexedDB
async function loadDataFromIndexedDB() {
try {
inventory = await db.inventory.toArray();
customerDatabase = await db.customers.toArray();
invoices = await db.invoices.toArray();
filteredInventory = [...inventory];
} catch (error) {
showStatus('Error loading data from IndexedDB: ' + error.message, 'error');
}
}
// Input sanitization function
function sanitizeInput(input) {
return input.replace(/[<>"'&]/g, '');
}
// Debounce function for autocomplete
function debounce(func, wait) {
let timeout;
return function executedFunction(...args) {
const later = () => {
clearTimeout(timeout);
func(...args);
};
clearTimeout(timeout);
timeout = setTimeout(later, wait);
};
}
// Generate unique invoice number
async function generateInvoiceNumber() {
try {
const existingInvoices = await db.invoices.toArray();
const existingNumbers = existingInvoices.map(inv => parseInt(inv.invoiceNumber.replace('INV-', '')));
const nextNumber = existingNumbers.length ? Math.max(...existingNumbers) + 1 : 1;
return `INV-${String(nextNumber).padStart(3, '0')}`;
} catch (error) {
showStatus('Error generating invoice number: ' + error.message, 'error');
return `INV-${Math.floor(Math.random() * 1000).toString().padStart(3, '0')}`;
}
}
// Navigation functionality
function setupNavigation() {
const navButtons = document.querySelectorAll('.nav-btn');
navButtons.forEach(button => {
button.addEventListener('click', function() {
navButtons.forEach(btn => btn.classList.remove('active'));
this.classList.add('active');
document.querySelectorAll('.section').forEach(section => section.classList.remove('active'));
document.getElementById(this.getAttribute('data-section')).classList.add('active');
});
});
}
// Show status message
function showStatus(message, type) {
const statusMessage = document.getElementById('statusMessage') || document.getElementById('backupStatusMessage');
statusMessage.textContent = message;
statusMessage.className = `status-message status-${type}`;
statusMessage.style.display = 'block';
setTimeout(() => {
statusMessage.style.display = 'none';
}, 3000);
}
// Show purchase history status message
function showPurchaseStatus(message, type) {
const statusMessage = document.getElementById('purchaseStatusMessage');
statusMessage.textContent = message;
statusMessage.className = `status-message status-${type}`;
statusMessage.style.display = 'block';
setTimeout(() => {
statusMessage.style.display = 'none';
}, 3000);
}
// Add new item row
function addItem() {
const itemsList = document.getElementById('itemsList').querySelector('tbody');
const newRow = document.createElement('tr');
newRow.className = 'item-row';
newRow.innerHTML = `
<td><input type="text" class="item-code code-input" placeholder="Enter HSN/SAC code..."><div class="dropdown item-dropdown"></div></td>
<td><input type="text" class="item-desc desc-input" placeholder="Service or product description"></td>
<td><select class="item-unit unit-select"><option value="PCS">PCS</option><option value="KG">KG</option><option value="LTR">LTR</option><option value="MTR">MTR</option><option value="BOX">BOX</option><option value="SET">SET</option></select></td>
<td><input type="number" class="item-qty qty-input" value="1" min="1"></td>
<td><input type="number" class="item-rate rate-input" value="0" step="0.01" min="0"></td>
<td>
<select class="disc-type-select">
<option value="percent">%</option>
<option value="amount">₹</option>
</select>
</td>
<td><input type="number" class="item-disc disc-input" value="0" step="0.01" min="0"></td>
<td><input type="text" class="item-total total-input" value="0.00" readonly></td>
<td><button class="remove-btn" onclick="removeItem(this)">Remove</button></td>
`;
itemsList.appendChild(newRow);
attachInputListeners(newRow);
setupItemAutocomplete(newRow);
updateItemTotals();
return newRow;
}
// Remove item row
function removeItem(button) {
const itemsList = document.getElementById('itemsList').querySelector('tbody');
if (itemsList.children.length > 1) {
button.closest('tr').remove();
updateItemTotals();
} else {
showStatus('At least one item is required.', 'error');
}
}
// Attach input listeners for real-time calculations
function attachInputListeners(row) {
row.querySelectorAll('.item-qty, .item-rate, .item-disc, .disc-type-select').forEach(input => {
input.addEventListener('input', () => {
const hsnCode = row.querySelector('.item-code').value;
const itemCode = row.querySelector('.item-code').getAttribute('data-item-code');
const qty = parseInt(row.querySelector('.item-qty').value) || 0;
const disc = parseFloat(row.querySelector('.item-disc').value) || 0;
const discType = row.querySelector('.disc-type-select').value;
const rate = parseFloat(row.querySelector('.item-rate').value) || 0;
// Validate quantity using item code, not HSN code
if (input.classList.contains('item-qty') && itemCode) {
const item = inventory.find(i => i.code === itemCode); // Use item code
if (item && qty > item.quantity) {
input.classList.add('quantity-error');
showStatus(`Insufficient stock for ${item.description}. Available: ${item.quantity} units.`, 'error');
input.value = item.quantity;
} else {
input.classList.remove('quantity-error');
}
}
// Validate discount
if (input.classList.contains('item-disc') || input.classList.contains('disc-type-select')) {
if (discType === 'percent' && disc > 100) {
input.classList.add('disc-error');
showStatus('Discount percentage cannot exceed 100%.', 'error');
input.value = 100;
} else if (discType === 'amount' && disc > qty * rate) {
input.classList.add('disc-error');
showStatus('Discount amount cannot exceed subtotal.', 'error');
input.value = qty * rate;
} else {
input.classList.remove('disc-error');
}
}
updateItemTotal(row);
updateItemTotals();
});
});
}
// Update individual item total
function updateItemTotal(row) {
const qty = parseFloat(row.querySelector('.item-qty').value) || 0;
const rate = parseFloat(row.querySelector('.item-rate').value) || 0;
const discType = row.querySelector('.disc-type-select').value;
const disc = parseFloat(row.querySelector('.item-disc').value) || 0;
const subtotal = qty * rate;
let discAmount = discType === 'percent' ? subtotal * (disc / 100) : disc;
const lineTotal = subtotal - discAmount;
row.querySelector('.item-total').value = lineTotal.toFixed(2);
}
// Update all item totals and invoice preview
function updateItemTotals() {
const rows = document.querySelectorAll('.item-row');
let subtotal = 0, totalDiscount = 0, grandTotal = 0;
let canGenerate = true;
rows.forEach(row => {
const code = row.querySelector('.item-code').value;
const qty = parseInt(row.querySelector('.item-qty').value) || 0;
const disc = parseFloat(row.querySelector('.item-disc').value) || 0;
const discType = row.querySelector('.disc-type-select').value;
const rate = parseFloat(row.querySelector('.item-rate').value) || 0;
const item = inventory.find(i => i.code === code);
if (item && qty > item.quantity) {
canGenerate = false;
row.querySelector('.item-qty').classList.add('quantity-error');
showStatus(`Insufficient stock for ${item.description}. Available: ${item.quantity} units.`, 'error');
} else {
row.querySelector('.item-qty').classList.remove('quantity-error');
}
if (discType === 'percent' && disc > 100) {
canGenerate = false;
row.querySelector('.item-disc').classList.add('disc-error');
showStatus('Discount percentage cannot exceed 100%.', 'error');
} else if (discType === 'amount' && disc > qty * rate) {
canGenerate = false;
row.querySelector('.item-disc').classList.add('disc-error');
showStatus('Discount amount cannot exceed subtotal.', 'error');
} else {
row.querySelector('.item-disc').classList.remove('disc-error');
}
});
if (!canGenerate) return;
rows.forEach(row => {
const qty = parseFloat(row.querySelector('.item-qty').value) || 0;
const rate = parseFloat(row.querySelector('.item-rate').value) || 0;
const discType = row.querySelector('.disc-type-select').value;
const disc = parseFloat(row.querySelector('.item-disc').value) || 0;
const subtotalAmount = qty * rate;
let discAmount = discType === 'percent' ? subtotalAmount * (disc / 100) : disc;
const lineTotal = subtotalAmount - discAmount;
row.querySelector('.item-total').value = lineTotal.toFixed(2);
subtotal += subtotalAmount;
totalDiscount += discAmount;
grandTotal += lineTotal;
});
const totalsRow = `
<tr>
<td colspan="3"></td>
<td colspan="2">Subtotal</td>
<td>₹${subtotal.toFixed(2)}</td>
</tr>
<tr>
<td colspan="3"></td>
<td colspan="2">Total Discount</td>
<td>₹${totalDiscount.toFixed(2)}</td>
</tr>
<tr>
<td colspan="3"></td>
<td colspan="2"><strong>Grand Total</strong></td>
<td><strong>₹${grandTotal.toFixed(2)}</strong></td>
</tr>
`;
generateInvoice(totalsRow);
}
// Save invoice and update inventory
async function saveInvoice() {
try {
const invoice = {
invoiceNumber: document.getElementById('invoiceNumber').value || await generateInvoiceNumber(),
invoiceDate: document.getElementById('invoiceDate').value,
dueDate: document.getElementById('dueDate').value,
clientContact: sanitizeInput(document.getElementById('clientContact').value),
clientName: sanitizeInput(document.getElementById('clientName').value),
clientEmail: sanitizeInput(document.getElementById('clientEmail').value),
clientAddress: sanitizeInput(document.getElementById('clientAddress').value),
items: [],
subtotal: 0,
totalDiscount: 0,
grandTotal: 0,
timestamp: new Date().toISOString()
};
const rows = document.querySelectorAll('.item-row');
let canSave = true;
rows.forEach(row => {
const hsnCode = row.querySelector('.item-code').value; // This is now HSN code
const itemCode = row.querySelector('.item-code').getAttribute('data-item-code'); // Get actual item code
const qty = parseInt(row.querySelector('.item-qty').value) || 0;
const disc = parseFloat(row.querySelector('.item-disc').value) || 0;
const discType = row.querySelector('.disc-type-select').value;
const rate = parseFloat(row.querySelector('.item-rate').value) || 0;
// Find item by item code for inventory check
const item = inventory.find(i => i.code === itemCode);
if (item && qty > item.quantity) {
canSave = false;
row.querySelector('.item-qty').classList.add('quantity-error');
showStatus(`Insufficient stock for ${item.description}. Available: ${item.quantity} units.`, 'error');
}
if (discType === 'percent' && disc > 100) {
canSave = false;
row.querySelector('.item-disc').classList.add('disc-error');
showStatus('Discount percentage cannot exceed 100%.', 'error');
} else if (discType === 'amount' && disc > qty * rate) {
canSave = false;
row.querySelector('.item-disc').classList.add('disc-error');
showStatus('Discount amount cannot exceed subtotal.', 'error');
}
});
if (!canSave) return;
rows.forEach(row => {
const hsnCode = row.querySelector('.item-code').value; // HSN code for display
const itemCode = row.querySelector('.item-code').getAttribute('data-item-code'); // Item code for inventory
const qty = parseFloat(row.querySelector('.item-qty').value) || 0;
const unit = row.querySelector('.item-unit').value || 'PCS';
const rate = parseFloat(row.querySelector('.item-rate').value) || 0;
const discType = row.querySelector('.disc-type-select').value;
const disc = parseFloat(row.querySelector('.item-disc').value) || 0;
const subtotalAmount = qty * rate;
let discAmount = discType === 'percent' ? subtotalAmount * (disc / 100) : disc;
const lineTotal = subtotalAmount - discAmount;
invoice.items.push({
code: sanitizeInput(hsnCode), // Store HSN code for invoice display
itemCode: sanitizeInput(itemCode), // Store item code for inventory tracking
description: sanitizeInput(row.querySelector('.item-desc').value),
quantity: qty,
unit: unit,
rate: rate,
discountType: discType,
discount: disc,
total: lineTotal
});
invoice.subtotal += subtotalAmount;
invoice.totalDiscount += discAmount;
invoice.grandTotal += lineTotal;
// Update inventory using item code, not HSN code
const item = inventory.find(i => i.code === itemCode);
if (item) item.quantity -= qty;
});
if (!invoice.clientContact || !invoice.clientName || invoice.items.length === 0) {
showStatus('Please fill in client details and add at least one item.', 'error');
return;
}
await db.invoices.put(invoice);
await db.inventory.bulkPut(inventory);
invoices = await db.invoices.toArray();
loadStockTable();
showStatus('Invoice saved successfully!', 'success');
updateDashboard();
// Reset form
document.getElementById('invoiceNumber').value = await generateInvoiceNumber();
document.getElementById('clientContact').value = '';
document.getElementById('clientName').value = '';
document.getElementById('clientEmail').value = '';
document.getElementById('clientAddress').value = '';
document.getElementById('whatsappNumber').value = '';
const itemsList = document.getElementById('itemsList').querySelector('tbody');
itemsList.innerHTML = `
<tr class="item-row">
<td><input type="text" class="item-code code-input" placeholder="Enter HSN/SAC code..."><div class="dropdown item-dropdown"></div></td>
<td><input type="text" class="item-desc desc-input" placeholder="Service or product description"></td>
<td><select class="item-unit unit-select"><option value="PCS">PCS</option><option value="KG">KG</option><option value="LTR">LTR</option><option value="MTR">MTR</option><option value="BOX">BOX</option><option value="SET">SET</option></select></td>
<td><input type="number" class="item-qty qty-input" value="1" min="1"></td>
<td><input type="number" class="item-rate rate-input" value="0" step="0.01" min="0"></td>
<td>
<select class="disc-type-select">
<option value="percent">%</option>
<option value="amount">₹</option>
</select>
</td>
<td><input type="number" class="item-disc disc-input" value="0" step="0.01" min="0"></td>
<td><input type="text" class="item-total total-input" value="0.00" readonly></td>
<td><button class="remove-btn" onclick="removeItem(this)">Remove</button></td>
</tr>
`;
document.querySelectorAll('.item-row').forEach(row => {
attachInputListeners(row);
setupItemAutocomplete(row);
});
} catch (error) {
showStatus('Error saving invoice: ' + error.message, 'error');
}
}
// Format date for display
function formatDate(dateString) {
if (!dateString) return '';
const date = new Date(dateString);
return date.toLocaleDateString('en-GB', { day: 'numeric', month: 'long', year: 'numeric' });
}
// Generate invoice preview
function generateInvoice(totalsRow) {
const companyName = sanitizeInput(document.getElementById('companyName').value) || 'Your Company Name';
const companyAddress = sanitizeInput(document.getElementById('companyAddress').value) || '123 Business Street, City, State - ZIP';
const companyContact = sanitizeInput(document.getElementById('companyContact').value) || 'Email: info@company.com | Phone: +91 9037393709';
const clientName = sanitizeInput(document.getElementById('clientName').value) || 'Customer Name';
const clientAddress = sanitizeInput(document.getElementById('clientAddress').value) || 'Customer Address';
const clientContact = sanitizeInput(document.getElementById('clientContact').value) || 'Customer Contact';
const clientEmail = sanitizeInput(document.getElementById('clientEmail').value) || 'Customer Email';
const invoiceNumber = sanitizeInput(document.getElementById('invoiceNumber').value) || 'INV-001';
const invoiceDate = document.getElementById('invoiceDate').value || formatDate(new Date());
const dueDate = document.getElementById('dueDate').value || formatDate(new Date());
let itemsHTML = '';
let grandTotal = 0;
document.querySelectorAll('.item-row').forEach(row => {
const code = sanitizeInput(row.querySelector('.item-code').value);
const description = sanitizeInput(row.querySelector('.item-desc').value) || 'Sample Item';
const unit = row.querySelector('.item-unit').value || 'PCS';
const qty = parseFloat(row.querySelector('.item-qty').value) || 0;
const rate = parseFloat(row.querySelector('.item-rate').value) || 0;
const discType = row.querySelector('.disc-type-select').value;
const disc = parseFloat(row.querySelector('.item-disc').value) || 0;
const subtotal = qty * rate;
let discAmount = discType === 'percent' ? subtotal * (disc / 100) : disc;
const lineTotal = subtotal - discAmount;
grandTotal += lineTotal;
itemsHTML += `
<tr>
<td>${code}</td>
<td>${description}</td>
<td>${unit}</td>
<td>${qty}</td>
<td>₹${rate.toFixed(2)}</td>
<td>${disc}${discType === 'percent' ? '%' : '₹'}</td>
<td>₹${lineTotal.toFixed(2)}</td>
</tr>
`;
});
document.getElementById('previewCompanyName').textContent = companyName;
document.getElementById('previewCompanyAddress').textContent = companyAddress;
document.getElementById('previewCompanyContact').textContent = companyContact;
document.getElementById('previewClientName').textContent = clientName;
document.getElementById('previewClientAddress').textContent = clientAddress;
document.getElementById('previewClientContact').textContent = clientContact;
document.getElementById('previewClientEmail').textContent = clientEmail;
document.getElementById('previewInvoiceNumber').textContent = invoiceNumber;
document.getElementById('previewInvoiceDate').textContent = formatDate(invoiceDate);
document.getElementById('previewDueDate').textContent = formatDate(dueDate);
document.getElementById('previewItems').innerHTML = itemsHTML;
document.getElementById('previewTotal').textContent = `₹${grandTotal.toFixed(2)}`;
}
// Generate PDF
async function generatePDF() {
try {
const { jsPDF } = window.jspdf;
const doc = new jsPDF();
const invoiceBox = document.querySelector('.invoice-box');
const logoElement = document.querySelector('.invoice-logo img');
const logoPosition = JSON.parse(localStorage.getItem('logoPosition')) || { x: 20, y: 20, width: 100, height: 50 };
// Add logo if present
if (logoElement && logoElement.src) {
try {
const imgData = await getImageData(logoElement);
doc.addImage(imgData, 'PNG', logoPosition.x, logoPosition.y, logoPosition.width, logoPosition.height);
} catch (error) {
console.error('Error adding logo to PDF:', error);
}
}
// Add company details
doc.setFontSize(14);
doc.setFont('helvetica', 'bold');
doc.text(document.getElementById('previewCompanyName').textContent, 20, logoPosition.y + logoPosition.height + 10);
doc.setFontSize(10);
doc.setFont('helvetica', 'normal');
doc.text(document.getElementById('previewCompanyAddress').textContent, 20, logoPosition.y + logoPosition.height + 20);
doc.text(document.getElementById('previewCompanyContact').textContent, 20, logoPosition.y + logoPosition.height + 30);
// Add invoice header
doc.setFontSize(16);
doc.setTextColor(255, 0, 0);
doc.text('INVOICE', 140, 40);
doc.setTextColor(0);
doc.setFontSize(10);
doc.text(`Invoice #: ${document.getElementById('previewInvoiceNumber').textContent}`, 140, 50);
doc.text(`Invoice Date: ${document.getElementById('previewInvoiceDate').textContent}`, 140, 60);
doc.text(`Due Date: ${document.getElementById('previewDueDate').textContent}`, 140, 70);
// Add bill to
doc.text('Bill To', 20, 80);
doc.text(document.getElementById('previewClientName').textContent, 20, 90);
doc.text(document.getElementById('previewClientAddress').textContent, 20, 100);
doc.text(`Contact: ${document.getElementById('previewClientContact').textContent}`, 20, 110);
doc.text(`Email: ${document.getElementById('previewClientEmail').textContent}`, 20, 120);
// Add items table
const items = [];
document.querySelectorAll('#previewItems tr').forEach(row => {
const cells = row.querySelectorAll('td');
items.push([
cells[0].textContent,
cells[1].textContent,
cells[2].textContent,
cells[3].textContent,
cells[4].textContent,
cells[5].textContent,
cells[6].textContent
]);
});
doc.autoTable({
startY: 130,
head: [['Code', 'Description', 'Unit', 'Qty', 'Rate', 'Discount', 'Total']],
body: items,
theme: 'grid',
headStyles: { fillColor: [248, 249, 250], textColor: [0, 0, 0] },
styles: { fontSize: 10 },
});
// Add total
const finalY = doc.lastAutoTable.finalY;
doc.setFontSize(12);
doc.setFont('helvetica', 'bold');
doc.text(`Grand Total: ${document.getElementById('previewTotal').textContent}`, 140, finalY + 10);
doc.save(`Invoice_${document.getElementById('previewInvoiceNumber').textContent}.pdf`);
} catch (error) {
showStatus('Error generating PDF: ' + error.message, 'error');
}
}
// Share PDF via WhatsApp
async function sharePDF() {
const { jsPDF } = window.jspdf;
const invoiceBox = document.querySelector('.invoice-box');
const whatsappNumber = document.getElementById('whatsappNumber').value;
if (!whatsappNumber) {
showStatus('Please enter a WhatsApp number.', 'error');
return;
}
try {
const canvas = await html2canvas(invoiceBox, { scale: 2, useCORS: true });
const imgData = canvas.toDataURL('image/jpeg', 1.0);
const pdf = new jsPDF({
orientation: 'portrait',
unit: 'mm',
format: 'a4'
});
const imgWidth = 190;
const pageHeight = 295;
const imgHeight = canvas.height * imgWidth / canvas.width;
let heightLeft = imgHeight;
let position = 10;
pdf.addImage(imgData, 'JPEG', 10, position, imgWidth, imgHeight);
heightLeft -= pageHeight - 20;
while (heightLeft > 0) {
position = heightLeft - imgHeight + 10;
pdf.addPage();
pdf.addImage(imgData, 'JPEG', 10, position, imgWidth, imgHeight);
heightLeft -= pageHeight - 20;
}
const pdfBlob = pdf.output('blob');
const file = new File([pdfBlob], `Invoice_${document.getElementById('invoiceNumber').value}.pdf`, { type: 'application/pdf' });
const formattedNumber = whatsappNumber.replace(/[^0-9]/g, '');
if (navigator.share) {
await navigator.share({
files: [file],
title: `Invoice ${document.getElementById('invoiceNumber').value}`,
text: `Here is your invoice #${document.getElementById('invoiceNumber').value}`
});
showStatus('PDF shared successfully!', 'success');
} else {
const encodedMessage = encodeURIComponent(`Here is your invoice #${document.getElementById('invoiceNumber').value}`);
const pdfDataUri = pdf.output('datauristring');
const whatsappUrl = `https://wa.me/${formattedNumber}?text=${encodedMessage}`;
window.open(whatsappUrl, '_blank');
showStatus('PDF cannot be shared directly. Opening WhatsApp with a link to send manually.', 'success');
}
} catch (error) {
console.error('Error sharing PDF:', error);
showStatus('Failed to share PDF.', 'error');
}
}
// Print invoice
function printInvoice() {
window.print();
}
// Get image data for PDF
async function getImageData(imgElement) {
const canvas = await html2canvas(imgElement, { scale: 2 });
return canvas.toDataURL('image/png');
}
// Setup item autocomplete
function setupItemAutocomplete(row) {
const codeInput = row.querySelector('.item-code');
const dropdown = row.querySelector('.item-dropdown');
codeInput.addEventListener('input', debounce(async function() {
const query = codeInput.value.toLowerCase();
const filteredItems = inventory.filter(item =>
item.code.toLowerCase().includes(query) ||
item.description.toLowerCase().includes(query) ||
item.hsn.toLowerCase().includes(query)
);
dropdown.innerHTML = '';
if (filteredItems.length > 0 && query) {
filteredItems.forEach(item => {
const div = document.createElement('div');
div.className = 'dropdown-item';
div.innerHTML = `<strong>${item.code}</strong> - ${item.description} (₹${item.price}, Stock: ${item.quantity})`;
div.onclick = () => {
// CHANGE: Store HSN code instead of item code
codeInput.value = item.hsn; // Changed from item.code to item.hsn
row.querySelector('.item-desc').value = item.description;
row.querySelector('.item-rate').value = item.price;
row.querySelector('.item-unit').value = item.unit;
row.querySelector('.disc-type-select').value = item.discountType;
row.querySelector('.item-disc').value = item.discount;
// Store item code separately for inventory tracking
codeInput.setAttribute('data-item-code', item.code);
updateItemTotal(row);
updateItemTotals();
dropdown.innerHTML = '';
dropdown.style.display = 'none';
};
dropdown.appendChild(div);
});
dropdown.style.display = 'block';
} else {
dropdown.style.display = 'none';
}
}, 300));
document.addEventListener('click', (e) => {
if (!row.contains(e.target)) {
dropdown.style.display = 'none';
}
});
}
// Setup client autocomplete
function setupClientAutocomplete() {
const contactInput = document.getElementById('clientContact');
const dropdown = document.getElementById('contactDropdown');
contactInput.addEventListener('input', debounce(async function() {
const query = contactInput.value.toLowerCase();
const filteredClients = customerDatabase.filter(client =>
client.contact.toLowerCase().includes(query) ||
client.name.toLowerCase().includes(query)
);
dropdown.innerHTML = '';
if (filteredClients.length > 0 && query) {
filteredClients.forEach(client => {
const div = document.createElement('div');
div.className = 'dropdown-item';
div.innerHTML = `<strong>${client.contact}</strong> - ${client.name}`;
div.onclick = () => {
contactInput.value = client.contact;
document.getElementById('clientName').value = client.name;
document.getElementById('clientEmail').value = client.email;
document.getElementById('clientAddress').value = client.address;
document.getElementById('whatsappNumber').value = client.contact;
[document.getElementById('clientName'), document.getElementById('clientEmail'), document.getElementById('clientAddress')].forEach(input => {
input.classList.add('auto-populated');
setTimeout(() => input.classList.remove('auto-populated'), 1000);
});
dropdown.innerHTML = '';
dropdown.style.display = 'none';
};
dropdown.appendChild(div);
});
dropdown.style.display = 'block';
} else {
dropdown.style.display = 'none';
}
}, 300));
document.addEventListener('click', (e) => {
if (!contactInput.contains(e.target) && !dropdown.contains(e.target)) {
dropdown.style.display = 'none';
}
});
}
// Add stock item
async function addStockItem() {
try {
const code = sanitizeInput(document.getElementById('stockCode').value);
const hsn = sanitizeInput(document.getElementById('stockHSN').value);
const description = sanitizeInput(document.getElementById('stockDescription').value);
const price = parseFloat(document.getElementById('stockPrice').value) || 0;
const unit = document.getElementById('stockUnit').value;
const quantity = parseInt(document.getElementById('stockQuantity').value) || 0;
const discountType = document.getElementById('stockDiscountType').value;
const discount = parseFloat(document.getElementById('stockDiscount').value) || 0;
if (!code || !description || price <= 0 || quantity < 0) {
showStatus('Please fill all fields with valid data.', 'error');
return;
}
if (discountType === 'percent' && discount > 100) {
showStatus('Discount percentage cannot exceed 100%.', 'error');
return;
}
const existingItem = inventory.find(item => item.code === code);
if (existingItem) {
existingItem.hsn = hsn;
existingItem.description = description;
existingItem.price = price;
existingItem.unit = unit;
existingItem.quantity = quantity;
existingItem.discountType = discountType;
existingItem.discount = discount;
await db.inventory.put(existingItem);
} else {
const newItem = { code, hsn, description, price, unit, quantity, discountType, discount };
await db.inventory.put(newItem);
inventory.push(newItem);
}
document.getElementById('stockCode').value = '';
document.getElementById('stockHSN').value = '';
document.getElementById('stockDescription').value = '';
document.getElementById('stockPrice').value = '';
document.getElementById('stockUnit').value = 'PCS';
document.getElementById('stockQuantity').value = '';
document.getElementById('stockDiscountType').value = 'percent';
document.getElementById('stockDiscount').value = '0';
loadStockTable();
showStatus('Item added to inventory successfully!', 'success');
} catch (error) {
showStatus('Error adding stock item: ' + error.message, 'error');
}
}
// Load stock table
async function loadStockTable() {
try {
const stockTableBody = document.getElementById('stockTableBody');
stockTableBody.innerHTML = '';
inventory = await db.inventory.toArray();
inventory.forEach(item => {
const row = document.createElement('tr');
row.innerHTML = `
<td>${item.code}</td>
<td>${item.hsn}</td>
<td>${item.description}</td>
<td>₹${item.price.toFixed(2)}</td>
<td>${item.unit}</td>
<td>${item.discount}${item.discountType === 'percent' ? '%' : '₹'}</td>
<td class="${item.quantity <= 5 ? 'low-stock' : ''}">${item.quantity}</td>
<td>
<button class="edit-btn" onclick="editStockItem('${item.code}')">Edit</button>
<button class="delete-btn" onclick="deleteStockItem('${item.code}')">Delete</button>
</td>
`;
stockTableBody.appendChild(row);
});
} catch (error) {
showStatus('Error loading stock table: ' + error.message, 'error');
}
}
// Edit stock item
async function editStockItem(code) {
const item = inventory.find(i => i.code === code);
if (item) {
document.getElementById('stockCode').value = item.code;
document.getElementById('stockHSN').value = item.hsn;
document.getElementById('stockDescription').value = item.description;
document.getElementById('stockPrice').value = item.price;
document.getElementById('stockUnit').value = item.unit;
document.getElementById('stockQuantity').value = item.quantity;
document.getElementById('stockDiscountType').value = item.discountType;
document.getElementById('stockDiscount').value = item.discount;
await deleteStockItem(code, false);
}
}
// Delete stock item
async function deleteStockItem(code, showMessage = true) {
try {
await db.inventory.delete(code);
inventory = inventory.filter(item => item.code !== code);
loadStockTable();
if (showMessage) showStatus('Item deleted successfully!', 'success');
} catch (error) {
showStatus('Error deleting stock item: ' + error.message, 'error');
}
}
// Add customer
async function addCustomer() {
try {
const contact = sanitizeInput(document.getElementById('newCustomerContact').value);
const name = sanitizeInput(document.getElementById('newCustomerName').value);
const email = sanitizeInput(document.getElementById('newCustomerEmail').value);
const address = sanitizeInput(document.getElementById('newCustomerAddress').value);
if (!contact || !name) {
showStatus('Contact number and name are required.', 'error');
return;
}
const existingCustomer = customerDatabase.find(c => c.contact === contact);
if (existingCustomer) {
existingCustomer.name = name;
existingCustomer.email = email;
existingCustomer.address = address;
await db.customers.put(existingCustomer);
} else {
const newCustomer = { contact, name, email, address };
await db.customers.put(newCustomer);
customerDatabase.push(newCustomer);
}
document.getElementById('newCustomerContact').value = '';
document.getElementById('newCustomerName').value = '';
document.getElementById('newCustomerEmail').value = '';
document.getElementById('newCustomerAddress').value = '';
loadCustomerTable();
showStatus('Customer added successfully!', 'success');
} catch (error) {
showStatus('Error adding customer: ' + error.message, 'error');
}
}
// Load customer table
async function loadCustomerTable() {
try {
const customerTableBody = document.getElementById('customerTableBody');
customerTableBody.innerHTML = '';
customerDatabase = await db.customers.toArray();
customerDatabase.forEach(customer => {
const row = document.createElement('tr');
row.innerHTML = `
<td>${customer.contact}</td>
<td>${customer.name}</td>
<td>${customer.email || '-'}</td>
<td>${customer.address || '-'}</td>
<td>
<button class="edit-btn" onclick="openEditCustomerDialog('${customer.contact}')">Edit</button>
<button class="delete-btn" onclick="deleteCustomer('${customer.contact}')">Delete</button>
<button class="view-purchases-btn" onclick="viewPurchaseHistory('${customer.contact}')">View Purchases</button>
</td>
`;
customerTableBody.appendChild(row);
});
} catch (error) {
showStatus('Error loading customer table: ' + error.message, 'error');
}
}
// Open edit customer dialog
function openEditCustomerDialog(contact) {
const customer = customerDatabase.find(c => c.contact === contact);
if (customer) {
editingCustomerContact = contact;
document.getElementById('editCustomerContact').value = customer.contact;
document.getElementById('editCustomerName').value = customer.name;
document.getElementById('editCustomerEmail').value = customer.email;
document.getElementById('editCustomerAddress').value = customer.address;
document.getElementById('editCustomerDialogOverlay').style.display = 'flex';
}
}
// Save edited customer
async function saveEditedCustomer() {
try {
const contact = sanitizeInput(document.getElementById('editCustomerContact').value);
const name = sanitizeInput(document.getElementById('editCustomerName').value);
const email = sanitizeInput(document.getElementById('editCustomerEmail').value);
const address = sanitizeInput(document.getElementById('editCustomerAddress').value);
if (!contact || !name) {
showStatus('Contact number and name are required.', 'error');
return;
}
await db.customers.delete(editingCustomerContact);
const updatedCustomer = { contact, name, email, address };
await db.customers.put(updatedCustomer);
customerDatabase = customerDatabase.map(c => c.contact === editingCustomerContact ? updatedCustomer : c);
editingCustomerContact = null;
closeDialog(null, 'editCustomerDialogOverlay');
loadCustomerTable();
showStatus('Customer updated successfully!', 'success');
} catch (error) {
showStatus('Error updating customer: ' + error.message, 'error');
}
}
// Delete customer
async function deleteCustomer(contact) {
try {
await db.customers.delete(contact);
customerDatabase = customerDatabase.filter(c => c.contact !== contact);
loadCustomerTable();
showStatus('Customer deleted successfully!', 'success');
} catch (error) {
showStatus('Error deleting customer: ' + error.message, 'error');
}
}
// View purchase history
async function viewPurchaseHistory(contact) {
try {
const customerInvoices = invoices.filter(inv => inv.clientContact === contact);
const purchaseHistoryList = document.getElementById('purchaseHistoryList');
purchaseHistoryList.innerHTML = '';
if (customerInvoices.length === 0) {
showPurchaseStatus('No purchase history found for this customer.', 'error');
document.getElementById('purchaseHistoryDialogOverlay').style.display = 'flex';
return;
}
customerInvoices.forEach(invoice => {
const itemsSummary = invoice.items.map(item => `${item.description} (Qty: ${item.quantity})`).join(', ');
const row = document.createElement('tr');
row.innerHTML = `
<td>${invoice.invoiceNumber}</td>
<td>${formatDate(invoice.invoiceDate)}</td>
<td>₹${invoice.grandTotal.toFixed(2)}</td>
<td>${itemsSummary}</td>
`;
purchaseHistoryList.appendChild(row);
});
document.getElementById('purchaseHistoryDialogOverlay').style.display = 'flex';
} catch (error) {
showPurchaseStatus('Error loading purchase history: ' + error.message, 'error');
}
}
// Open item selection dialog
async function openItemDialog() {
try {
filteredInventory = await db.inventory.toArray();
loadItemDialog();
document.getElementById('dialogOverlay').style.display = 'flex';
} catch (error) {
showStatus('Error opening item dialog: ' + error.message, 'error');
}
}
// Load items into dialog
function loadItemDialog() {
const itemsList = document.getElementById('itemsList2');
itemsList.innerHTML = '';
filteredInventory.forEach(item => {
const row = document.createElement('tr');
row.innerHTML = `
<td>${item.code}</td>
<td>${item.name || item.description}</td>
<td>${item.description}</td>
<td>₹${item.price.toFixed(2)}</td>
<td>${item.discount}${item.discountType === 'percent' ? '%' : '₹'}</td>
`;
row.onclick = () => {
const newRow = addItem();
// CHANGE: Set HSN code in the visible field, store item code in data attribute
newRow.querySelector('.item-code').value = item.hsn; // Changed to HSN
newRow.querySelector('.item-code').setAttribute('data-item-code', item.code); // Store item code
newRow.querySelector('.item-desc').value = item.description;
newRow.querySelector('.item-rate').value = item.price;
newRow.querySelector('.item-unit').value = item.unit;
newRow.querySelector('.disc-type-select').value = item.discountType;
newRow.querySelector('.item-disc').value = item.discount;
updateItemTotal(newRow);
updateItemTotals();
};
itemsList.appendChild(row);
});
}
// Search items in dialog
function searchItems() {
const query = document.getElementById('searchInput').value.toLowerCase();
filteredInventory = inventory.filter(item =>
item.code.toLowerCase().includes(query) ||
item.description.toLowerCase().includes(query) ||
item.hsn.toLowerCase().includes(query)
);
loadItemDialog();
}
// Close dialog
function closeDialog(event, dialogId) {
if (event && event.target.id !== dialogId) return;
document.getElementById(dialogId).style.display = 'none';
}
// Dialog resizing
function applyCustomSize(dialogId, widthInputId, heightInputId) {
const dialog = document.getElementById(dialogId);
const width = parseInt(document.getElementById(widthInputId).value) || 600;
const height = parseInt(document.getElementById(heightInputId).value) || 450;
dialog.style.width = `${Math.max(300, Math.min(width, 1200))}px`;
dialog.style.maxHeight = `${Math.max(200, Math.min(height, 800))}px`;
}
function quickResize(width, height, dialogId, widthInputId, heightInputId) {
document.getElementById(widthInputId).value = width;
document.getElementById(heightInputId).value = height;
applyCustomSize(dialogId, widthInputId, heightInputId);
}
// Generate WhatsApp message
function generateWhatsAppMessage() {
const phoneNumber = document.getElementById('whatsappNumber').value;
const maxDescLength = parseInt(document.getElementById('whatsappDescLength').value) || 20;
if (!phoneNumber) {
showStatus('Please enter a WhatsApp number.', 'error');
return;
}
let message = `Invoice from ${document.getElementById('previewCompanyName').textContent}\n`;
message += `Invoice #: ${document.getElementById('previewInvoiceNumber').textContent}\n`;
message += `Date: ${document.getElementById('previewInvoiceDate').textContent}\n`;
message += `Bill To: ${document.getElementById('previewClientName').textContent}\n\n`;
message += `Items:\n`;
document.querySelectorAll('.item-row').forEach(row => {
const description = row.querySelector('.item-desc').value;
const qty = row.querySelector('.item-qty').value;
const rate = row.querySelector('.item-rate').value;
const unit = row.querySelector('.item-unit').value;
const disc = row.querySelector('.item-disc').value;
const discType = row.querySelector('.disc-type-select').value;
const total = row.querySelector('.item-total').value;
const shortDesc = description.length > maxDescLength ? description.substring(0, maxDescLength) + '...' : description;
message += `- ${shortDesc} (${qty} ${unit} @ ₹${parseFloat(rate).toFixed(2)}, Disc: ${disc}${discType === 'percent' ? '%' : '₹'}) = ₹${parseFloat(total).toFixed(2)}\n`;
});
message += `\nGrand Total: ${document.getElementById('previewTotal').textContent}`;
const preview = document.getElementById('whatsappPreview');
preview.textContent = message;
preview.style.display = 'block';
}
// Send WhatsApp message
function sendWhatsApp() {
const phoneNumber = document.getElementById('whatsappNumber').value;
const preview = document.getElementById('whatsappPreview').textContent;
if (!phoneNumber || !preview) {
showStatus('Please generate a WhatsApp message first.', 'error');
return;
}
const whatsappUrl = `https://wa.me/${phoneNumber}?text=${encodeURIComponent(preview)}`;
window.open(whatsappUrl, '_blank');
showStatus('WhatsApp message sent!', 'success');
}
// Backup all data
async function backupData() {
try {
const data = {
inventory: await db.inventory.toArray(),
customers: await db.customers.toArray(),
invoices: await db.invoices.toArray()
};
const blob = new Blob([JSON.stringify(data, null, 2)], { type: 'application/json' });
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = `invoice_backup_${new Date().toISOString().split('T')[0]}.json`;
a.click();
URL.revokeObjectURL(url);
showStatus('Backup created successfully!', 'success');
} catch (error) {
showStatus('Error creating backup: ' + error.message, 'error');
}
}
// Restore all data
async function restoreData() {
try {
const fileInput = document.getElementById('restoreFileInput');
const file = fileInput.files[0];
if (!file) {
showStatus('Please select a backup file.', 'error');
return;
}
const reader = new FileReader();
reader.onload = async (e) => {
try {
const data = JSON.parse(e.target.result);
await db.transaction('rw', db.inventory, db.customers, db.invoices, async () => {
await db.inventory.clear();
await db.customers.clear();
await db.invoices.clear();
if (data.inventory) await db.inventory.bulkPut(data.inventory);
if (data.customers) await db.customers.bulkPut(data.customers);
if (data.invoices) await db.invoices.bulkPut(data.invoices);
});
await loadDataFromIndexedDB();
loadStockTable();
loadCustomerTable();
updateDashboard();
showStatus('Data restored successfully!', 'success');
} catch (error) {
showStatus('Error restoring data: ' + error.message, 'error');
}
};
reader.readAsText(file);
} catch (error) {
showStatus('Error initiating restore: ' + error.message, 'error');
}
}
// Backup stock data
async function backupStockData() {
try {
const inventory = await db.inventory.toArray();
const blob = new Blob([JSON.stringify(inventory, null, 2)], { type: 'application/json' });
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = `stock_backup_${new Date().toISOString().split('T')[0]}.json`;
a.click();
URL.revokeObjectURL(url);
showStatus('Stock backup created successfully!', 'success');
} catch (error) {
showStatus('Error creating stock backup: ' + error.message, 'error');
}
}
// Restore stock data
async function restoreStockData() {
try {
const fileInput = document.getElementById('restoreStockFileInput');
const file = fileInput.files[0];
if (!file) {
showStatus('Please select a stock backup file.', 'error');
return;
}
const reader = new FileReader();
reader.onload = async (e) => {
try {
const inventoryData = JSON.parse(e.target.result);
await db.inventory.clear();
await db.inventory.bulkPut(inventoryData);
inventory = await db.inventory.toArray();
loadStockTable();
showStatus('Stock data restored successfully!', 'success');
} catch (error) {
showStatus('Error restoring stock data: ' + error.message, 'error');
}
};
reader.readAsText(file);
} catch (error) {
showStatus('Error initiating stock restore: ' + error.message, 'error');
}
}
// Backup customer data
async function backupCustomerData() {
try {
const customers = await db.customers.toArray();
const blob = new Blob([JSON.stringify(customers, null, 2)], { type: 'application/json' });
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = `customer_backup_${new Date().toISOString().split('T')[0]}.json`;
a.click();
URL.revokeObjectURL(url);
showStatus('Customer backup created successfully!', 'success');
} catch (error) {
showStatus('Error creating customer backup: ' + error.message, 'error');
}
}
// Restore customer data
async function restoreCustomerData() {
try {
const fileInput = document.getElementById('restoreCustomerFileInput');
const file = fileInput.files[0];
if (!file) {
showStatus('Please select a customer backup file.', 'error');
return;
}
const reader = new FileReader();
reader.onload = async (e) => {
try {
const customerData = JSON.parse(e.target.result);
await db.customers.clear();
await db.customers.bulkPut(customerData);
customerDatabase = await db.customers.toArray();
loadCustomerTable();
showStatus('Customer data restored successfully!', 'success');
} catch (error) {
showStatus('Error restoring customer data: ' + error.message, 'error');
}
};
reader.readAsText(file);
} catch (error) {
showStatus('Error initiating customer restore: ' + error.message, 'error');
}
}
// Export invoices to CSV
function exportInvoicesToCSV() {
let csv = 'Invoice Number,Invoice Date,Due Date,Client Name,Client Contact,Client Email,Client Address,Item Code,Item Description,Item Unit,Item Quantity,Item Rate,Item Discount Type,Item Discount,Item Total,Invoice Subtotal,Invoice Total Discount,Invoice Grand Total\n';
invoices.forEach(invoice => {
invoice.items.forEach(item => {
// Sanitize fields to handle special characters
const invoiceNumber = `"${sanitizeInput(invoice.invoiceNumber)}"`;
const invoiceDate = `"${formatDate(invoice.invoiceDate)}"`;
const dueDate = `"${formatDate(invoice.dueDate)}"`;
const clientName = `"${sanitizeInput(invoice.clientName).replace(/"/g, '""')}"`;
const clientContact = `"${sanitizeInput(invoice.clientContact).replace(/"/g, '""')}"`;
const clientEmail = `"${sanitizeInput(invoice.clientEmail).replace(/"/g, '""')}"`;
const clientAddress = `"${sanitizeInput(invoice.clientAddress).replace(/"/g, '""')}"`;
const itemCode = `"${sanitizeInput(item.code).replace(/"/g, '""')}"`;
const itemDescription = `"${sanitizeInput(item.description).replace(/"/g, '""')}"`;
const itemUnit = `"${item.unit}"`;
const itemQuantity = `"${item.quantity}"`;
const itemRate = `"${item.rate.toFixed(2)}"`;
const itemDiscountType = `"${item.discountType}"`;
const itemDiscount = `"${item.discount.toFixed(2)}"`;
const itemTotal = `"${item.total.toFixed(2)}"`;
const invoiceSubtotal = `"${invoice.subtotal.toFixed(2)}"`;
const invoiceTotalDiscount = `"${invoice.totalDiscount.toFixed(2)}"`;
const invoiceGrandTotal = `"${invoice.grandTotal.toFixed(2)}"`;
csv += `${invoiceNumber},${invoiceDate},${dueDate},${clientName},${clientContact},${clientEmail},${clientAddress},${itemCode},${itemDescription},${itemUnit},${itemQuantity},${itemRate},${itemDiscountType},${itemDiscount},${itemTotal},${invoiceSubtotal},${invoiceTotalDiscount},${invoiceGrandTotal}\n`;
});
});
const blob = new Blob([csv], { type: 'text/csv' });
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = 'invoices_export.csv';
a.click();
URL.revokeObjectURL(url);
showStatus('Invoices exported to CSV successfully.', 'success');
}
// Update sales dashboard
async function updateDashboard() {
try {
const dateRange = document.getElementById('dateRangeFilter').value;
let startDate, endDate = new Date();
if (dateRange === 'custom') {
startDate = new Date(document.getElementById('fromDate').value);
endDate = new Date(document.getElementById('toDate').value);
} else {
startDate = new Date();
startDate.setDate(endDate.getDate() - parseInt(dateRange));
}
const invoices = await db.invoices.toArray();
const filteredInvoices = invoices.filter(inv => {
const invDate = new Date(inv.timestamp);
return invDate >= startDate && invDate <= endDate;
});
let totalRevenue = 0, totalOrders = filteredInvoices.length, totalProducts = 0, totalDiscount = 0;
const productSales = {};
const recentOrders = [];
filteredInvoices.forEach(inv => {
totalRevenue += inv.grandTotal;
totalDiscount += inv.totalDiscount;
inv.items.forEach(item => {
totalProducts += item.quantity;
productSales[item.code] = (productSales[item.code] || 0) + item.quantity;
});
recentOrders.push({
invoiceNumber: inv.invoiceNumber,
date: formatDate(inv.timestamp),
total: inv.grandTotal,
client: inv.clientName
});
});
const topProducts = Object.entries(productSales)
.map(([code, qty]) => {
const item = inventory.find(i => i.code === code);
return { code, name: item ? item.description : code, quantity: qty };
})
.sort((a, b) => b.quantity - a.quantity)
.slice(0, 5);
document.getElementById('totalRevenue').textContent = `₹${totalRevenue.toFixed(2)}`;
document.getElementById('totalOrders').textContent = totalOrders;
document.getElementById('totalCustomers').textContent = new Set(filteredInvoices.map(inv => inv.clientContact)).size;
document.getElementById('totalProducts').textContent = totalProducts;
document.getElementById('totalDiscount').textContent = `₹${totalDiscount.toFixed(2)}`;
const topProductsList = document.getElementById('topProductsList');
topProductsList.innerHTML = '';
topProducts.forEach(product => {
const div = document.createElement('div');
div.innerHTML = `<span>${product.name}</span><span>${product.quantity} units</span>`;
topProductsList.appendChild(div);
});
const recentOrdersList = document.getElementById('recentOrdersList');
recentOrdersList.innerHTML = '';
recentOrders.slice(0, 5).forEach(order => {
const div = document.createElement('div');
div.innerHTML = `<span>${order.invoiceNumber} - ${order.client}</span><span>${order.date} | ₹${order.total.toFixed(2)}</span>`;
recentOrdersList.appendChild(div);
});
} catch (error) {
showStatus('Error updating dashboard: ' + error.message, 'error');
}
}
// Toggle custom date range
function toggleCustomDateRange() {
const dateRange = document.getElementById('dateRangeFilter').value;
document.getElementById('customDateRange').classList.toggle('hidden', dateRange !== 'custom');
updateDashboard();
}
// Clear all invoices
async function clearInvoices() {
if (!confirm('Are you sure you want to clear all invoices? This action cannot be undone.')) return;
try {
await db.invoices.clear();
invoices = [];
updateDashboard();
showStatus('All invoices cleared successfully!', 'success');
} catch (error) {
showStatus('Error clearing invoices: ' + error.message, 'error');
}
}
// Logo handling
let isDragging = false, isResizing = false, startX, startY, startWidth, startHeight;
const logoElement = document.createElement('div');
logoElement.className = 'invoice-logo';
logoElement.innerHTML = `
<img id="logoImg" style="display:none;">
<div class="resize-handle top-left"></div>
<div class="resize-handle top-right"></div>
<div class="resize-handle bottom-left"></div>
<div class="resize-handle bottom-right"></div>
`;
document.querySelector('.invoice-box').prepend(logoElement);
function setupLogo() {
const logoUpload = document.getElementById('logoUpload');
const logoImg = document.getElementById('logoImg');
const logoWidthInput = document.getElementById('logoWidth');
const logoHeightInput = document.getElementById('logoHeight');
const lockAspectRatio = document.getElementById('lockAspectRatio');
let aspectRatio = 1;
const savedLogo = localStorage.getItem('logo');
const savedPosition = JSON.parse(localStorage.getItem('logoPosition'));
if (savedLogo && savedPosition) {
logoImg.src = savedLogo;
logoImg.style.display = 'block';
logoElement.style.left = `${savedPosition.x}px`;
logoElement.style.top = `${savedPosition.y}px`;
logoElement.style.width = `${savedPosition.width}px`;
logoElement.style.height = `${savedPosition.height}px`;
logoWidthInput.value = savedPosition.width;
logoHeightInput.value = savedPosition.height;
aspectRatio = savedPosition.width / savedPosition.height;
}
logoUpload.addEventListener('change', (e) => {
const file = e.target.files[0];
if (file) {
const reader = new FileReader();
reader.onload = (e) => {
logoImg.src = e.target.result;
logoImg.style.display = 'block';
const img = new Image();
img.src = e.target.result;
img.onload = () => {
aspectRatio = img.width / img.height;
const width = 100;
const height = width / aspectRatio;
logoElement.style.width = `${width}px`;
logoElement.style.height = `${height}px`;
logoWidthInput.value = width;
logoHeightInput.value = height;
saveLogoPosition();
};
localStorage.setItem('logo', e.target.result);
};
reader.readAsDataURL(file);
}
});
logoElement.addEventListener('mousedown', (e) => {
if (e.target.classList.contains('resize-handle')) {
isResizing = true;
startX = e.clientX;
startY = e.clientY;
startWidth = parseFloat(getComputedStyle(logoElement).width);
startHeight = parseFloat(getComputedStyle(logoElement).height);
logoElement.classList.add('active');
e.preventDefault();
} else if (e.target === logoImg) {
isDragging = true;
startX = e.clientX - parseFloat(logoElement.style.left || 0);
startY = e.clientY - parseFloat(logoElement.style.top || 0);
logoElement.classList.add('active');
e.preventDefault();
}
});
document.addEventListener('mousemove', (e) => {
if (isDragging) {
logoElement.style.left = `${e.clientX - startX}px`;
logoElement.style.top = `${e.clientY - startY}px`;
saveLogoPosition();
} else if (isResizing) {
const handle = document.activeElement || e.target;
let newWidth = startWidth;
let newHeight = startHeight;
const deltaX = e.clientX - startX;
const deltaY = e.clientY - startY;
if (handle.classList.contains('top-left')) {
newWidth = startWidth - deltaX;
newHeight = lockAspectRatio.checked ? newWidth / aspectRatio : startHeight - deltaY;
logoElement.style.left = `${parseFloat(logoElement.style.left || 0) + deltaX}px`;
logoElement.style.top = `${parseFloat(logoElement.style.top || 0) + deltaY}px`;
} else if (handle.classList.contains('top-right')) {
newWidth = startWidth + deltaX;
newHeight = lockAspectRatio.checked ? newWidth / aspectRatio : startHeight - deltaY;
logoElement.style.top = `${parseFloat(logoElement.style.top || 0) + deltaY}px`;
} else if (handle.classList.contains('bottom-left')) {
newWidth = startWidth - deltaX;
newHeight = lockAspectRatio.checked ? newWidth / aspectRatio : startHeight + deltaY;
logoElement.style.left = `${parseFloat(logoElement.style.left || 0) + deltaX}px`;
} else if (handle.classList.contains('bottom-right')) {
newWidth = startWidth + deltaX;
newHeight = lockAspectRatio.checked ? newWidth / aspectRatio : startHeight + deltaY;
}
newWidth = Math.max(20, Math.min(newWidth, 300));
newHeight = Math.max(20, Math.min(newHeight, 300));
logoElement.style.width = `${newWidth}px`;
logoElement.style.height = `${newHeight}px`;
logoWidthInput.value = Math.round(newWidth);
logoHeightInput.value = Math.round(newHeight);
saveLogoPosition();
}
});
document.addEventListener('mouseup', () => {
isDragging = false;
isResizing = false;
});
logoElement.addEventListener('dblclick', () => {
logoElement.classList.toggle('active');
});
logoWidthInput.addEventListener('input', () => {
let width = parseFloat(logoWidthInput.value) || 100;
width = Math.max(20, Math.min(width, 300));
logoElement.style.width = `${width}px`;
if (lockAspectRatio.checked) {
const height = width / aspectRatio;
logoElement.style.height = `${height}px`;
logoHeightInput.value = Math.round(height);
}
saveLogoPosition();
});
logoHeightInput.addEventListener('input', () => {
let height = parseFloat(logoHeightInput.value) || 50;
height = Math.max(20, Math.min(height, 300));
logoElement.style.height = `${height}px`;
if (lockAspectRatio.checked) {
const width = height * aspectRatio;
logoElement.style.width = `${width}px`;
logoWidthInput.value = Math.round(width);
}
saveLogoPosition();
});
function saveLogoPosition() {
const position = {
x: parseFloat(logoElement.style.left || 20),
y: parseFloat(logoElement.style.top || 20),
width: parseFloat(logoElement.style.width || 100),
height: parseFloat(logoElement.style.height || 50)
};
localStorage.setItem('logoPosition', JSON.stringify(position));
}
}
function resetLogoPosition() {
const logoImg = document.getElementById('logoImg');
if (logoImg.src) {
logoElement.style.left = '20px';
logoElement.style.top = '20px';
logoElement.style.width = '100px';
logoElement.style.height = '50px';
document.getElementById('logoWidth').value = 100;
document.getElementById('logoHeight').value = 50;
localStorage.setItem('logoPosition', JSON.stringify({ x: 20, y: 20, width: 100, height: 50 }));
}
}
function removeLogo() {
const logoImg = document.getElementById('logoImg');
logoImg.src = '';
logoImg.style.display = 'none';
logoElement.style.width = '0px';
logoElement.style.height = '0px';
document.getElementById('logoWidth').value = '';
document.getElementById('logoHeight').value = '';
localStorage.removeItem('logo');
localStorage.removeItem('logoPosition');
}
// Initialize application
async function initialize() {
await migrateLocalStorageToIndexedDB();
await loadDataFromIndexedDB();
setupNavigation();
setupClientAutocomplete();
document.querySelectorAll('.item-row').forEach(row => {
attachInputListeners(row);
setupItemAutocomplete(row);
});
loadStockTable();
loadCustomerTable();
updateDashboard();
setupLogo();
// Set default dates
const today = new Date().toISOString().split('T')[0];
document.getElementById('invoiceDate').value = today;
document.getElementById('dueDate').value = today;
document.getElementById('invoiceNumber').value = await generateInvoiceNumber();
}
document.addEventListener('DOMContentLoaded', initialize);
</script>
</body>
</html>
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