chore: fixes

pkg/utils/utils.go

@@ -5,35 +5,46 @@ import (
 	"unicode"
 
 	"golang.org/x/crypto/bcrypt"
+	"golang.org/x/exp/rand"
 )
 
 func isASCII(s string) bool {
-    for _, c := range s {
-        if c > unicode.MaxASCII {
-            return false
-        }
-    }
-    return true
+	for _, c := range s {
+		if c > unicode.MaxASCII {
+			return false
+		}
+	}
+	return true
 }
 
 // HashPassword generates a bcrypt hash for the given password.
 func HashPassword(password string) (string, error) {
-    bytes, err := bcrypt.GenerateFromPassword([]byte(password), 14)
-    return string(bytes), err
+	bytes, err := bcrypt.GenerateFromPassword([]byte(password), 14)
+	return string(bytes), err
 }
 
 // VerifyPassword verifies if the given password matches the stored hash.
 func VerifyPassword(password, hash string) bool {
-    err := bcrypt.CompareHashAndPassword([]byte(hash), []byte(password))
-    return err == nil
+	err := bcrypt.CompareHashAndPassword([]byte(hash), []byte(password))
+	return err == nil
 }
 
 func IsChineseChar(str string) bool {
 
-    for _, r := range str {
-        if unicode.Is(unicode.Han, r) || (regexp.MustCompile("[\u3002\uff1b\uff0c\uff1a\u201c\u201d\uff08\uff09\u3001\uff1f\u300a\u300b]").MatchString(string(r))) {
-            return true
-        }
-    }
-    return false
+	for _, r := range str {
+		if unicode.Is(unicode.Han, r) || (regexp.MustCompile("[\u3002\uff1b\uff0c\uff1a\u201c\u201d\uff08\uff09\u3001\uff1f\u300a\u300b]").MatchString(string(r))) {
+			return true
+		}
+	}
+	return false
+}
+
+var letterRunes = []rune("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
+
+func RandString(n int) string {
+	b := make([]rune, n)
+	for i := range b {
+		b[i] = letterRunes[rand.Intn(len(letterRunes))]
+	}
+	return string(b)
 }