Messaging service, adapters, refactoring

adapters/randomstring/service.go

@@ -0,0 +1,32 @@
+package randomstring
+
+import (
+	"context"
+	"math/rand"
+)
+
+const chars = "abcdefghijklmnopqrstuvwxyz0123456789"
+
+type Service struct {
+	chars  []rune
+	length int
+	size   uint
+}
+
+func New(size uint) *Service {
+	return &Service{
+		chars:  []rune(chars),
+		length: len([]rune(chars)),
+		size:   size,
+	}
+}
+
+func (s *Service) NewString(context.Context) string {
+	res := make([]rune, s.size)
+
+	for i := uint(0); i < s.size; i++ {
+		res[i] = s.chars[rand.Intn(s.length)]
+	}
+
+	return string(res)
+}