WhatsApp + Kotlin

import io.ktor.client.*
import io.ktor.client.request.*
import io.ktor.http.*

suspend fun sendMessage() {
    val client = HttpClient()
    val response =
        client.post("http://localhost:3000/api/sendText") {
            contentType(ContentType.Application.Json)
            setBody(
                mapOf(
                    "session" to "default",
                    "chatId" to "12132132130@newsletter",
                    "text" to "Hi there!"
                )
            )
        }
    println(response.status)
}

import io.ktor.application.*
import io.ktor.features.ContentNegotiation
import io.ktor.jackson.jackson
import io.ktor.request.*
import io.ktor.response.*
import io.ktor.routing.*
import io.ktor.server.engine.*
import io.ktor.server.netty.*

fun main() {
    embeddedServer(Netty, port = 8080) {
        install(ContentNegotiation) {
            jackson()
        }
        routing {
            post("/bot") {
                val data = call.receive<Map<String, Any>>()
                if (data["event"] == "message") {  // Fixed condition logic
                    processMessage(data["payload"])
                }
                call.respondText("OK")
            }
        }
    }.start(wait = true)
}

fun processMessage(payload: Any?) {
    println("Processing message: $payload")
}