complete role crud

providers/provider.go

@@ -11,4 +11,5 @@ import (
 	_ "atom/providers/log"
 	_ "atom/providers/query"
 	_ "atom/providers/single_flight"
+	_ "atom/providers/uuid"
 )

providers/uuid/uuid.go

@@ -0,0 +1,37 @@
+package uuid
+
+import (
+	"atom/container"
+	"log"
+
+	"github.com/gofrs/uuid"
+)
+
+func init() {
+	if err := container.Container.Provide(NewUUID); err != nil {
+		log.Fatal(err)
+	}
+}
+
+type Generator struct {
+	generator uuid.Generator
+}
+
+func NewUUID() (*Generator, error) {
+	return &Generator{
+		generator: uuid.DefaultGenerator,
+	}, nil
+}
+
+func (u *Generator) MustGenerate() string {
+	uuid, _ := u.Generate()
+	return uuid
+}
+
+func (u *Generator) Generate() (string, error) {
+	uuid, err := u.generator.NewV4()
+	if err != nil {
+		return "", err
+	}
+	return uuid.String(), err
+}