examples/basic_tools/invoice_creator/index.html


<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Invoice Generator</title>
    <style>
        :root {
            --primary-color: #3498db;
            --secondary-color: #2c3e50;
            --background-color: #ecf0f1;
            --text-color: #34495e;
        }

        body {
            font-family: Arial, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--background-color);
            margin: 0;
            padding: 20px;
        }

        .container {
            max-width: 800px;
            margin: 0 auto;
            background-color: white;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
        }

        h1, h2 {
            text-align: center;
            color: var(--secondary-color);
        }

        .upload-section, .form-section, .preview-section, .invoice-list-section {
            margin-bottom: 20px;
        }

        .upload-area {
            border: 2px dashed var(--primary-color);
            border-radius: 8px;
            padding: 20px;
            text-align: center;
            cursor: pointer;
            transition: background-color 0.3s ease;
        }

        .upload-area:hover {
            background-color: rgba(52, 152, 219, 0.1);
        }

        #imagePreview {
            max-width: 100%;
            max-height: 200px;
            margin-top: 10px;
        }

        .form-group {
            margin-bottom: 15px;
        }

        label {
            display: block;
            margin-bottom: 5px;
        }

        input[type="text"], input[type="number"] {
            width: 100%;
            padding: 8px;
            border: 1px solid #ccc;
            border-radius: 4px;
        }

        button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 4px;
            cursor: pointer;
            transition: background-color 0.3s ease;
        }

        button:hover {
            background-color: #2980b9;
        }

        button:disabled {
            background-color: #bdc3c7;
            cursor: not-allowed;
        }

        #itemList, #invoiceList {
            list-style-type: none;
            padding: 0;
        }

        #itemList li, #invoiceList li {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 10px;
            padding: 10px;
            background-color: #f8f9fa;
            border-radius: 4px;
        }

        #totalPrice {
            font-weight: bold;
            text-align: right;
            margin-top: 10px;
        }

        .hidden {
            display: none;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        .loader {
            border: 4px solid #f3f3f3;
            border-top: 4px solid var(--primary-color);
            border-radius: 50%;
            width: 30px;
            height: 30px;
            animation: spin 1s linear infinite;
            margin: 20px auto;
        }

        .modal {
            display: none;
            position: fixed;
            z-index: 1;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            overflow: auto;
            background-color: rgba(0,0,0,0.4);
        }

        .modal-content {
            background-color: #fefefe;
            margin: 15% auto;
            padding: 20px;
            border: 1px solid #888;
            width: 80%;
            max-width: 600px;
        }

        .close {
            color: #aaa;
            float: right;
            font-size: 28px;
            font-weight: bold;
        }

        .close:hover,
        .close:focus {
            color: black;
            text-decoration: none;
            cursor: pointer;
        }

        #modalPreview {
            width: 100%;
            height: auto;
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>Invoice Generator</h1>

        <div class="upload-section">
            <div class="upload-area" id="uploadArea">
                <p>Drag and drop your logo here or click to upload</p>
                <input type="file" id="imageUpload" accept="image/*" style="display: none;">
            </div>
            <img id="imagePreview" class="hidden" alt="Logo preview">
        </div>

        <div class="form-section">
            <div class="form-group">
                <label for="itemName">Item Name:</label>
                <input type="text" id="itemName" required>
            </div>
            <div class="form-group">
                <label for="itemPrice">Item Price:</label>
                <input type="number" id="itemPrice" step="0.01" required>
            </div>
            <button id="addItem">Add Item</button>
        </div>

        <div class="preview-section">
            <h2>Invoice Preview</h2>
            <ul id="itemList"></ul>
            <div id="totalPrice">Total: $0.00</div>
        </div>

        <button id="generateInvoice">Generate Invoice</button>
        <div id="loader" class="loader hidden"></div>
        <button id="downloadPdf" class="hidden">Download PDF</button>

        <div class="invoice-list-section">
            <h2>Generated Invoices</h2>
            <ul id="invoiceList"></ul>
        </div>
    </div>

    <div id="previewModal" class="modal">
        <div class="modal-content">
            <span class="close">&times;</span>
            <img id="modalPreview" alt="Invoice preview">
        </div>
    </div>

    <script>
        const uploadArea = document.getElementById('uploadArea');
        const imageUpload = document.getElementById('imageUpload');
        const imagePreview = document.getElementById('imagePreview');
        const itemName = document.getElementById('itemName');
        const itemPrice = document.getElementById('itemPrice');
        const addItemButton = document.getElementById('addItem');
        const itemList = document.getElementById('itemList');
        const totalPrice = document.getElementById('totalPrice');
        const generateInvoiceButton = document.getElementById('generateInvoice');
        const downloadPdfButton = document.getElementById('downloadPdf');
        const loader = document.getElementById('loader');
        const invoiceList = document.getElementById('invoiceList');
        const previewModal = document.getElementById('previewModal');
        const modalPreview = document.getElementById('modalPreview');
        const closeModal = document.getElementsByClassName('close')[0];

        let items = [];
        let imageId = null;

        uploadArea.addEventListener('click', () => imageUpload.click());
        uploadArea.addEventListener('dragover', (e) => e.preventDefault());
        uploadArea.addEventListener('drop', handleDrop);
        imageUpload.addEventListener('change', handleImageUpload);
        addItemButton.addEventListener('click', addItem);
        generateInvoiceButton.addEventListener('click', generateInvoice);
        closeModal.onclick = () => previewModal.style.display = "none";
        window.onclick = (event) => {
            if (event.target == previewModal) {
                previewModal.style.display = "none";
            }
        };

        function handleDrop(e) {
            e.preventDefault();
            const file = e.dataTransfer.files[0];
            if (file && file.type.startsWith('image/')) {
                handleImageUpload({ target: { files: [file] } });
            }
        }

        function handleImageUpload(e) {
            const file = e.target.files[0];
            if (file) {
                const reader = new FileReader();
                reader.onload = (e) => {
                    imagePreview.src = e.target.result;
                    imagePreview.classList.remove('hidden');
                    uploadArea.classList.add('hidden');
                };
                reader.readAsDataURL(file);
                uploadImage(file);
            }
        }

        function uploadImage(file) {
            const formData = new FormData();
            formData.append('image', file);

            fetch('http://localhost:6363/upload_image', {
                method: 'POST',
                body: formData
            })
            .then(response => response.json())
            .then(data => {
                imageId = data.image_id;
            })
            .catch(error => console.error('Error uploading image:', error));
        }

        function addItem() {
            const name = itemName.value.trim();
            const price = parseFloat(itemPrice.value);

            if (name && !isNaN(price)) {
                items.push({ name, price });
                updateItemList();
                itemName.value = '';
                itemPrice.value = '';
            }
        }

        function updateItemList() {
            itemList.innerHTML = '';
            let total = 0;

            items.forEach((item, index) => {
                const li = document.createElement('li');
                li.textContent = `${item.name}: $${item.price.toFixed(2)}`;
                const removeButton = document.createElement('button');
                removeButton.textContent = 'Remove';
                removeButton.onclick = () => removeItem(index);
                li.appendChild(removeButton);
                itemList.appendChild(li);
                total += item.price;
            });

            totalPrice.textContent = `Total: $${total.toFixed(2)}`;
        }

        function removeItem(index) {
            items.splice(index, 1);
            updateItemList();
        }

        function generateInvoice() {
            if (!imageId || items.length === 0) {
                alert('Please upload an image and add at least one item.');
                return;
            }

            loader.classList.remove('hidden');
            generateInvoiceButton.disabled = true;

            fetch('http://localhost:6363/generate_invoice', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({
                    image_id: imageId,
                    items: items
                })
            })
            .then(response => response.json())
            .then(data => {
                loader.classList.add('hidden');
                generateInvoiceButton.disabled = false;
                downloadPdfButton.classList.remove('hidden');
                downloadPdfButton.onclick = () => downloadPdf(data.invoice_id);
                loadInvoiceList();
            })
            .catch(error => {
                console.error('Error generating invoice:', error);
                loader.classList.add('hidden');
                generateInvoiceButton.disabled = false;
                alert('Error generating invoice. Please try again.');
            });
        }

        function downloadPdf(invoiceId) {
            window.location.href = `http://localhost:6363/download_pdf/${invoiceId}`;
        }

        function loadInvoiceList() {
            fetch('http://localhost:6363/list_invoices')
                .then(response => response.json())
                .then(invoices => {
                    invoiceList.innerHTML = '';
                    invoices.forEach(invoice => {
                        const li = document.createElement('li');
                        li.innerHTML = `
                            Invoice ${invoice.id.slice(0, 8)} - Total: $${invoice.total.toFixed(2)} 
                            <span>Created: ${new Date(invoice.created_at).toLocaleString()}</span>
                            <button onclick="showPreview('${invoice.id}')">Preview</button>
                            <button onclick="downloadPdf('${invoice.id}')">Download</button>
                        `;
                        invoiceList.appendChild(li);
                    });
                })
                .catch(error => console.error('Error loading invoice list:', error));
        }

        function showPreview(invoiceId) {
            modalPreview.src = `http://localhost:6363/preview_pdf/${invoiceId}`;
            previewModal.style.display = "block";
            modalPreview.onload = () => {
                if (modalPreview.naturalWidth === 0) {
                    modalPreview.src = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAACklEQVR4nGMAAQAABQABDQottAAAAABJRU5ErkJggg==';
                    alert('Error loading preview. Please try again.');
                }
            };
        }

        // Load invoice list when the page loads
        loadInvoiceList();
    </script>
</body>
</html>