Initial commit

adapters/stdoutpub/service.go

@@ -0,0 +1,26 @@
+package stdoutpub
+
+import (
+	"fmt"
+	"os"
+)
+
+const outPrefix = "Result: "
+
+func NewService() Service {
+	return Service{
+		fd: os.Stdout,
+	}
+}
+
+type Service struct {
+	fd *os.File
+}
+
+func (s Service) Publish(i int64) error {
+	if _, err := fmt.Fprintf(s.fd, "%s%d\n", outPrefix, i); err != nil {
+		return fmt.Errorf("write to file: %w", err)
+	}
+
+	return nil
+}