SMS Webhook Handler

telnyx-edge new-func -l=javascript -n=sms-handler
cd sms-handler

export async function handler(request) {
    // Verify this is a POST from Telnyx
    if (request.method !== "POST") {
        return new Response("Method not allowed", { status: 405 });
    }
    
    const webhook = await request.json();
    const event = webhook.data;
    
    // Handle incoming SMS
    if (event.event_type === "message.received") {
        const from = event.payload.from.phone_number;
        const text = event.payload.text.toLowerCase().trim();
        
        // Keyword-based responses
        let reply;
        if (text === "help") {
            reply = "Commands: HOURS, LOCATION, STATUS";
        } else if (text === "hours") {
            reply = "We're open Mon-Fri 9am-5pm EST";
        } else if (text === "location") {
            reply = "123 Main St, New York, NY 10001";
        } else if (text === "status") {
            reply = "All systems operational ✓";
        } else {
            reply = `Thanks for your message! Reply HELP for options.`;
        }
        
        // Send reply via Telnyx API
        await sendSMS(from, reply);
    }
    
    return new Response(JSON.stringify({ received: true }), {
        headers: { "Content-Type": "application/json" }
    });
}

async function sendSMS(to, text) {
    const response = await fetch("https://api.telnyx.com/v2/messages", {
        method: "POST",
        headers: {
            "Authorization": `Bearer ${process.env.TELNYX_API_KEY}`,
            "Content-Type": "application/json"
        },
        body: JSON.stringify({
            from: process.env.TELNYX_PHONE_NUMBER,
            to: to,
            text: text
        })
    });
    
    if (!response.ok) {
        console.error("Failed to send SMS:", await response.text());
    }
}

telnyx-edge secrets add TELNYX_API_KEY "your-api-key-from-portal"
telnyx-edge secrets add TELNYX_PHONE_NUMBER "+15551234567"

telnyx-edge ship