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/providers/memstore/memstore.go

@@ -0,0 +1,31 @@
+package memstore
+
+import (
+	"context"
+	"github.com/lmika/awstools/internal/sqs-browse/models"
+	"sync"
+)
+
+type Store struct {
+	messages []models.Message
+
+	mtx *sync.Mutex
+	currSeqNo uint64
+}
+
+func (s *Store) Save(ctx context.Context, msg *models.Message) error {
+	s.mtx.Lock()
+	defer s.mtx.Unlock()
+
+	s.currSeqNo++
+	msg.ID = s.currSeqNo
+	s.messages = append(s.messages, *msg)
+	return nil
+}
+
+func NewStore() *Store {
+	return &Store{
+		messages: make([]models.Message, 0),
+		mtx: new(sync.Mutex),
+	}
+}