wasm-nats-stream-client/messaging.go

package main

import (
	"github.com/bytecodealliance/wasm-tools-go/cm"
	"gitea.rebus.ninja/lore/go-nats-client/gen/wasmcloud/messaging/consumer"
	"gitea.rebus.ninja/lore/go-nats-client/gen/wasmcloud/messaging/types"
	"go.wasmcloud.dev/component/log/wasilog"
)

type messagingConsumerAdapter struct {
	Publish func(msg types.BrokerMessage) (result cm.Result[string, struct{}, string])
}

// NOTE(lxf): this is overridden in tests
var messagingConsumer = &messagingConsumerAdapter{
	Publish: consumer.Publish,
}

func handleMessage(msg types.BrokerMessage) cm.Result[string, struct{}, string] {
	logger := wasilog.ContextLogger("handleMessage")

	logger.Info("Received message", "subject", msg.Subject)

	reply := types.BrokerMessage{
		Subject: msg.Subject + ".reply",
		Body:    msg.Body,
		ReplyTo: cm.None[string](),
	}
	res := messagingConsumer.Publish(reply)
	if res.IsErr() {
		logger.Error("Failed to send reply", "error", *res.Err())
		return res
	}

	return cm.OK[cm.Result[string, struct{}, string]](struct{}{})
}