WhatsApp Marketing & Promotional Campaigns

// Send promotional campaign to customer list
async function sendPromotionalCampaign(campaign) {
  const message = `🎉 ${campaign.title}

${campaign.body}

🛍️ Shop now: ${campaign.link}
💬 Reply STOP to unsubscribe

– ${STORE_NAME}`;

  // Send to all customers in parallel
  const results = await Promise.all(
    campaign.customers.map(async (customer) => {
      const response = await fetch("https://api.nabdaotp.com/api/v1/messages/send", {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
          "Authorization": `Bearer ${instanceToken}`
        },
        body: JSON.stringify({
          phone: customer.phone,  // e.g. "+9647701234567"
          message: message
        })
      });

      return {
        phone: customer.phone,
        success: response.ok,
        messageId: (await response.json()).messageId
      };
    })
  );

  // Track campaign performance
  await logCampaign({
    id: campaign.id,
    sent: results.filter(r => r.success).length,
    failed: results.filter(r => !r.success).length,
    timestamp: new Date()
  });

  return results;
}

// Example: Flash sale campaign
await sendPromotionalCampaign({
  title: "⚡ Flash Sale — 50% OFF Today Only!",
  body: "Get 50% off all electronics until midnight. Limited stock available!",
  link: "https://yourstore.com/flash-sale",
  customers: await getActiveCustomers()
});