Bot Jualan dengan Generate Invoice Otomatis

Bikin invoice manual = Capek dan error!

Biarkan bot generate invoice otomatis setiap ada order. Lebih rapi, profesional, dan efisien!

Fitur Invoice Otomatis

✅ Auto generate saat order confirmed
✅ Nomor invoice sequential
✅ Detail lengkap (item, qty, harga)
✅ Kirim via WA (text/PDF)
✅ Track status pembayaran
✅ Reminder jatuh tempo

Format Invoice WhatsApp

Invoice Text (Simple):

📄 INVOICE

━━━━━━━━━━━━━━━━━━━━━━━━━
INVOICE #INV-2026-0001
Tanggal: 20 Januari 2026
━━━━━━━━━━━━━━━━━━━━━━━━━

Kepada:
[NAMA CUSTOMER]
[ALAMAT]
[NO HP]

━━━━━━━━━━━━━━━━━━━━━━━━━
DETAIL PESANAN
━━━━━━━━━━━━━━━━━━━━━━━━━
Produk A (Size M)
  1 x Rp 150.000      Rp 150.000

Produk B (Hitam)
  2 x Rp 75.000       Rp 150.000

━━━━━━━━━━━━━━━━━━━━━━━━━
Subtotal:             Rp 300.000
Ongkir (JNE REG):     Rp 15.000
Diskon (PROMO10):    -Rp 30.000
━━━━━━━━━━━━━━━━━━━━━━━━━
TOTAL:                Rp 285.000
━━━━━━━━━━━━━━━━━━━━━━━━━

💳 PEMBAYARAN:
Bank: BCA
No. Rek: 1234567890
A.n: [NAMA TOKO]

⏰ Batas bayar: 22 Jan 2026 (1x24 jam)

Setelah transfer, kirim bukti ke sini!

Terima kasih 🙏
━━━━━━━━━━━━━━━━━━━━━━━━━
[NAMA TOKO]
WA: 08123456789
IG: @namatoko

Invoice dengan Status:

📄 INVOICE #INV-2026-0001

Status: ⏳ BELUM DIBAYAR

Total: Rp 285.000
Jatuh tempo: 22 Jan 2026

💳 Transfer ke:
BCA 1234567890 a.n. [NAMA]

Sudah bayar? Kirim bukti transfer!

Invoice Lunas:

✅ INVOICE LUNAS!

Invoice: #INV-2026-0001
Total: Rp 285.000
Dibayar: 21 Jan 2026 14:30

Pesanan sedang diproses!
Estimasi kirim: Hari ini

Terima kasih! 🎉

Implementasi Generate Invoice

Invoice Number Generator:

javascript

async function generateInvoiceNumber() {
    const year = new Date().getFullYear();
    const month = String(new Date().getMonth() + 1).padStart(2, '0');
    
    // Get last invoice number this month
    const lastInvoice = await db.invoices.findOne({
        invoiceNumber: { $regex: `^INV-${year}${month}` }
    }, { sort: { invoiceNumber: -1 } });
    
    let sequence = 1;
    if (lastInvoice) {
        const lastSeq = parseInt(lastInvoice.invoiceNumber.split('-')[2]);
        sequence = lastSeq + 1;
    }
    
    return `INV-${year}${month}-${String(sequence).padStart(4, '0')}`;
    // Output: INV-202601-0001
}

Create Invoice:

javascript

async function createInvoice(order) {
    const invoiceNumber = await generateInvoiceNumber();
    
    const invoice = {
        invoiceNumber,
        orderId: order.id,
        customerId: order.customerId,
        customerName: order.customerName,
        customerAddress: order.address,
        customerPhone: order.phone,
        items: order.items.map(item => ({
            name: item.name,
            variant: item.variant,
            quantity: item.quantity,
            unitPrice: item.price,
            subtotal: item.quantity * item.price
        })),
        subtotal: order.subtotal,
        shipping: order.shipping,
        discount: order.discount,
        total: order.total,
        status: 'unpaid',
        createdAt: new Date(),
        dueDate: addDays(new Date(), 1), // 1x24 jam
        paidAt: null
    };
    
    await db.invoices.insert(invoice);
    return invoice;
}

Format Invoice Message:

javascript

function formatInvoiceMessage(invoice) {
    const itemLines = invoice.items.map(item => 
        `${item.name} ${item.variant ? `(${item.variant})` : ''}
  ${item.quantity} x Rp ${item.unitPrice.toLocaleString()}      Rp ${item.subtotal.toLocaleString()}`
    ).join('\n\n');
    
    return `📄 INVOICE

━━━━━━━━━━━━━━━━━━━━━━━━━
INVOICE #${invoice.invoiceNumber}
Tanggal: ${formatDate(invoice.createdAt)}
━━━━━━━━━━━━━━━━━━━━━━━━━

Kepada:
${invoice.customerName}
${invoice.customerAddress}
${invoice.customerPhone}

━━━━━━━━━━━━━━━━━━━━━━━━━
DETAIL PESANAN
━━━━━━━━━━━━━━━━━━━━━━━━━
${itemLines}

━━━━━━━━━━━━━━━━━━━━━━━━━
Subtotal:             Rp ${invoice.subtotal.toLocaleString()}
Ongkir:               Rp ${invoice.shipping.toLocaleString()}
${invoice.discount > 0 ? `Diskon:              -Rp ${invoice.discount.toLocaleString()}` : ''}
━━━━━━━━━━━━━━━━━━━━━━━━━
TOTAL:                Rp ${invoice.total.toLocaleString()}
━━━━━━━━━━━━━━━━━━━━━━━━━

💳 PEMBAYARAN:
Bank: BCA
No. Rek: 1234567890
A.n: ${STORE_NAME}

⏰ Batas bayar: ${formatDate(invoice.dueDate)}

Setelah transfer, kirim bukti ke sini!`;
}

Generate PDF Invoice

javascript

const PDFDocument = require('pdfkit');
const fs = require('fs');

async function generateInvoicePDF(invoice) {
    const doc = new PDFDocument({ margin: 50 });
    const filePath = `/tmp/invoice-${invoice.invoiceNumber}.pdf`;
    
    doc.pipe(fs.createWriteStream(filePath));
    
    // Header
    doc.fontSize(20).text('INVOICE', { align: 'center' });
    doc.fontSize(12).text(`#${invoice.invoiceNumber}`, { align: 'center' });
    doc.moveDown();
    
    // Customer info
    doc.fontSize(10);
    doc.text(`Kepada: ${invoice.customerName}`);
    doc.text(invoice.customerAddress);
    doc.text(invoice.customerPhone);
    doc.moveDown();
    
    // Items table
    doc.fontSize(10).text('Detail Pesanan:', { underline: true });
    doc.moveDown(0.5);
    
    for (const item of invoice.items) {
        doc.text(`${item.name} ${item.variant || ''}`);
        doc.text(`  ${item.quantity} x Rp ${item.unitPrice.toLocaleString()} = Rp ${item.subtotal.toLocaleString()}`);
    }
    
    doc.moveDown();
    
    // Totals
    doc.text(`Subtotal: Rp ${invoice.subtotal.toLocaleString()}`, { align: 'right' });
    doc.text(`Ongkir: Rp ${invoice.shipping.toLocaleString()}`, { align: 'right' });
    if (invoice.discount > 0) {
        doc.text(`Diskon: -Rp ${invoice.discount.toLocaleString()}`, { align: 'right' });
    }
    doc.fontSize(12).text(`TOTAL: Rp ${invoice.total.toLocaleString()}`, { align: 'right' });
    
    doc.moveDown();
    
    // Payment info
    doc.fontSize(10).text('Pembayaran:');
    doc.text('Bank BCA: 1234567890');
    doc.text(`a.n. ${STORE_NAME}`);
    doc.text(`Batas bayar: ${formatDate(invoice.dueDate)}`);
    
    doc.end();
    
    return filePath;
}

// Kirim PDF via WhatsApp
async function sendInvoicePDF(phone, invoice) {
    const pdfPath = await generateInvoicePDF(invoice);
    
    const media = MessageMedia.fromFilePath(pdfPath);
    await client.sendMessage(phone, media, {
        caption: `📄 Invoice #${invoice.invoiceNumber}\nTotal: Rp ${invoice.total.toLocaleString()}`
    });
    
    // Cleanup
    fs.unlinkSync(pdfPath);
}

Payment Tracking

javascript

// Mark invoice as paid
async function markInvoicePaid(invoiceNumber, paymentProof) {
    const invoice = await db.invoices.findOne({ invoiceNumber });
    
    if (!invoice) {
        return { success: false, message: 'Invoice tidak ditemukan' };
    }
    
    if (invoice.status === 'paid') {
        return { success: false, message: 'Invoice sudah lunas' };
    }
    
    await db.invoices.update(invoiceNumber, {
        status: 'paid',
        paidAt: new Date(),
        paymentProof: paymentProof
    });
    
    // Update order status
    await db.orders.update(invoice.orderId, {
        status: 'paid',
        paidAt: new Date()
    });
    
    return { success: true, invoice };
}

// Auto reminder for unpaid invoices
cron.schedule('0 9 * * *', async () => {
    const unpaidInvoices = await db.invoices.find({
        status: 'unpaid',
        dueDate: { $lte: addHours(new Date(), 6) } // Due dalam 6 jam
    });
    
    for (const invoice of unpaidInvoices) {
        await sendPaymentReminder(invoice);
    }
});

Bot Handler

javascript

client.on('message', async msg => {
    const text = msg.body.toUpperCase();
    
    // Cek invoice
    if (text.startsWith('CEK INVOICE ')) {
        const invoiceNum = text.replace('CEK INVOICE ', '');
        const invoice = await db.invoices.findOne({ invoiceNumber: invoiceNum });
        
        if (invoice) {
            await msg.reply(formatInvoiceStatus(invoice));
        } else {
            await msg.reply('Invoice tidak ditemukan.');
        }
    }
    
    // Kirim ulang invoice
    if (text.startsWith('INVOICE ')) {
        const invoiceNum = text.replace('INVOICE ', '');
        const invoice = await db.invoices.findOne({ invoiceNumber: invoiceNum });
        
        if (invoice) {
            await sendInvoicePDF(msg.from, invoice);
        }
    }
});

FAQ

Text atau PDF?

Text untuk simple & quick. PDF untuk profesional & archive. Bisa offer keduanya!

Bagaimana track yang sudah bayar?

Customer kirim bukti TF → Admin verify → Mark as paid → Auto update status.

Perlu nomor invoice sequential?

Recommended untuk tracking dan accounting. Format: INV-YYYYMM-XXXX

Kesimpulan

Auto invoice = Professional & efficient!

Look professional with auto invoices!

Setup Invoice Bot →

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