fix: mask email and phone number on the backend (#563)

* fix: mask email and phone number on the backend

Signed-off-by: Yixiang Zhao <seriouszyx@foxmail.com>

* fix: login with masked email or phone

Signed-off-by: Yixiang Zhao <seriouszyx@foxmail.com>

* fix: improve regex

Signed-off-by: Yixiang Zhao <seriouszyx@foxmail.com>

util/regex.go

@@ -20,10 +20,12 @@ import (
 )
 
 var rePhoneCn *regexp.Regexp
+var rePhone *regexp.Regexp
 
 func init() {
 	// https://learnku.com/articles/31543
 	rePhoneCn, _ = regexp.Compile(`^1(3\d|4[5-9]|5[0-35-9]|6[2567]|7[0-8]|8\d|9[0-35-9])\d{8}$`)
+	rePhone, _ = regexp.Compile("(\\d{3})\\d*(\\d{4})")
 }
 
 func IsEmailValid(email string) bool {
@@ -34,3 +36,7 @@ func IsEmailValid(email string) bool {
 func IsPhoneCnValid(phone string) bool {
 	return rePhoneCn.MatchString(phone)
 }
+
+func getMaskedPhone(phone string) string {
+	return rePhone.ReplaceAllString(phone, "$1****$2")
+}

util/string.go

@@ -206,3 +206,28 @@ func IsChinese(str string) bool {
 	}
 	return flag
 }
+
+func GetMaskedPhone(phone string) string {
+	return getMaskedPhone(phone)
+}
+
+func GetMaskedEmail(email string) string {
+	if email == "" {
+		return ""
+	}
+
+	tokens := strings.Split(email, "@")
+	username := maskString(tokens[0])
+	domain := tokens[1]
+	domainTokens := strings.Split(domain, ".")
+	domainTokens[len(domainTokens) - 2] = maskString(domainTokens[len(domainTokens) - 2])
+	return fmt.Sprintf("%s@%s", username, strings.Join(domainTokens, "."))
+}
+
+func maskString(str string) string {
+	if len(str) <= 2 {
+		return str
+	} else {
+		return fmt.Sprintf("%c%s%c", str[0], strings.Repeat("*", len(str) - 2), str[len(str) - 1])
+	}
+}