sqs-browse: new tool

Started working on a new tool to poll and browse an SQS queue.  This is built using a TUI framework

internal/sqs-browse/services/pollmessage/iface.go

@@ -0,0 +1,14 @@
+package pollmessage
+
+import (
+	"context"
+	"github.com/lmika/awstools/internal/sqs-browse/models"
+)
+
+type MessageStore interface {
+	Save(ctx context.Context, msg *models.Message) error
+}
+
+type MessagePoller interface {
+	PollForNewMessages(ctx context.Context, queue string) ([]*models.Message, error)
+}

internal/sqs-browse/services/pollmessage/service.go

@@ -0,0 +1,45 @@
+package pollmessage
+
+import (
+	"context"
+	"github.com/lmika/events"
+	"github.com/pkg/errors"
+	"log"
+)
+
+type Service struct {
+	store  MessageStore
+	poller MessagePoller
+	queue  string
+	bus    *events.Bus
+}
+
+func NewService(store MessageStore, poller MessagePoller, queue string, bus *events.Bus) *Service {
+	return &Service{
+		store:  store,
+		poller: poller,
+		queue:  queue,
+		bus:    bus,
+	}
+}
+
+// Poll starts polling for new messages and adding them to the message store
+func (s *Service) Poll(ctx context.Context) error {
+	for ctx.Err() == nil {
+		log.Printf("polling for new messages: %v", s.queue)
+		newMsgs, err := s.poller.PollForNewMessages(ctx, s.queue)
+		if err != nil {
+			return errors.Wrap(err, "unable to poll for messages")
+		}
+
+		for _, msg := range newMsgs {
+			if err := s.store.Save(ctx, msg); err != nil {
+				log.Println("warn: unable to save new message %v", err)
+				continue
+			}
+		}
+
+		s.bus.Fire("new-messages", newMsgs)
+	}
+	return nil
+}