publish lancet

validator/validator.go

@@ -0,0 +1,194 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package validator implements some validate function for string.
+package validator
+
+import (
+	"net"
+	"regexp"
+	"strconv"
+	"unicode"
+)
+
+// IsAlpha checks if the string contains only letters (a-zA-Z)
+func IsAlpha(s string) bool {
+	pattern := `^[a-zA-Z]+$`
+	reg := regexp.MustCompile(pattern)
+	return reg.MatchString(s)
+}
+
+// IsNumberStr check if the string can convert to a number.
+func IsNumberStr(s string) bool {
+	return IsIntStr(s) || IsFloatStr(s)
+}
+
+// IsFloatStr check if the string can convert to a float.
+func IsFloatStr(s string) bool {
+	_, e := strconv.ParseFloat(s, 64)
+
+	if e != nil {
+		return false
+	}
+	return true
+}
+
+// IsIntStr check if the string can convert to a integer.
+func IsIntStr(s string) bool {
+	match, _ := regexp.MatchString(`^[\+-]?\d+$`, s)
+	return match
+}
+
+// IsIp check if the string is a ip address.
+func IsIp(ipstr string) bool {
+	ip := net.ParseIP(ipstr)
+	if ip == nil {
+		return false
+	}
+	return true
+}
+
+// IsIpV4 check if the string is a ipv4 address.
+func IsIpV4(ipstr string) bool {
+	ip := net.ParseIP(ipstr)
+	if ip == nil {
+		return false
+	}
+	for i := 0; i < len(ipstr); i++ {
+		switch ipstr[i] {
+		case '.':
+			return true
+		}
+	}
+	return false
+}
+
+// IsIpV6 check if the string is a ipv6 address.
+func IsIpV6(ipstr string) bool {
+	ip := net.ParseIP(ipstr)
+	if ip == nil {
+		return false
+	}
+	for i := 0; i < len(ipstr); i++ {
+		switch ipstr[i] {
+		case ':':
+			return true
+		}
+	}
+	return false
+}
+
+// IsDns check if the string is dns.
+func IsDns(dns string) bool {
+	pattern := `^[a-zA-Z]([a-zA-Z0-9\-]+[\.]?)*[a-zA-Z0-9]$`
+	reg := regexp.MustCompile(pattern)
+	return reg.MatchString(dns)
+}
+
+// IsEmail check if the string is a email address.
+func IsEmail(email string) bool {
+	pattern := `\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*`
+	reg := regexp.MustCompile(pattern)
+	return reg.MatchString(email)
+}
+
+// IsChineseMobile check if the string is chinese mobile number.
+func IsChineseMobile(mobileNum string) bool {
+	pattern := "^((13[0-9])|(14[5,7])|(15[0-3,5-9])|(17[0,3,5-8])|(18[0-9])|166|198|199|(147))\\d{8}$"
+	reg := regexp.MustCompile(pattern)
+	return reg.MatchString(mobileNum)
+}
+
+// IsChineseIdNum check if the string is chinese id number.
+func IsChineseIdNum(id string) bool {
+	pattern := `^[1-9]\d{5}(18|19|20|21|22)\d{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)\d{3}[0-9Xx]$`
+	reg := regexp.MustCompile(pattern)
+	return reg.MatchString(id)
+}
+
+// ContainChinese check if the string contain mandarin chinese.
+func ContainChinese(s string) bool {
+	pattern := "[\u4e00-\u9fa5]"
+	reg := regexp.MustCompile(pattern)
+	return reg.MatchString(s)
+}
+
+// IsChinesePhone check if the string is chinese phone number.
+// Valid chinese phone is xxx-xxxxxxxx or xxxx-xxxxxxx
+func IsChinesePhone(phone string) bool {
+	pattern := `\d{3}-\d{8}|\d{4}-\d{7}`
+	reg := regexp.MustCompile(pattern)
+	return reg.MatchString(phone)
+}
+
+// IsCreditCard check if the string is credit card.
+func IsCreditCard(creditCart string) bool {
+ pattern := `^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|(222[1-9]|22[3-9][0-9]|2[3-6][0-9]{2}|27[01][0-9]|2720)[0-9]{12}|6(?:011|5[0-9][0-9])[0-9]{12}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|(?:2131|1800|35\\d{3})\\d{11}|6[27][0-9]{14})$`
+ reg := regexp.MustCompile(pattern)
+ return reg.MatchString(creditCart)
+}
+
+// IsBase64 check if the string is base64 string.
+func IsBase64(base64 string) bool {
+	pattern := `^(?:[A-Za-z0-9+\\/]{4})*(?:[A-Za-z0-9+\\/]{2}==|[A-Za-z0-9+\\/]{3}=|[A-Za-z0-9+\\/]{4})$`
+	reg := regexp.MustCompile(pattern)
+	return reg.MatchString(base64)
+}
+
+// IsEmptyString check if the string is empty.
+func IsEmptyString(s string) bool {
+	return len(s) == 0
+}
+
+// IsRegexMatch check if the string match the regexp
+func IsRegexMatch(s, regex string) bool {
+	reg := regexp.MustCompile(regex)
+	return reg.MatchString(s)
+}
+
+// IsStrongPassword check if the string is strong password, if len(password) is less than the length param, return false
+// Strong password: alpha(lower+upper) + number + special chars(!@#$%^&*()?><)
+func IsStrongPassword(password string, length int) bool {
+	if len(password) < length {
+		return false
+	}
+	var num, lower, upper, special bool
+	for _, r := range password {
+		switch {
+		case unicode.IsDigit(r):
+			num = true
+		case unicode.IsUpper(r):
+			upper = true
+		case unicode.IsLower(r):
+			lower = true
+		case unicode.IsSymbol(r), unicode.IsPunct(r):
+			special = true
+		}
+	}
+
+	return num && lower && upper && special
+
+	// go doesn't support regexp (?=re)
+	//pattern := `^(?=.*[0-9])(?=.*[a-zA-Z])(?=.*[@#$%^&+=])(?=\S+$).$`
+	//reg := regexp.MustCompile(pattern)
+	//return reg.MatchString(password)
+}
+
+// IsWeakPassword check if the string is weak password
+// Weak password: only letter or only number or letter + number
+func IsWeakPassword(password string) bool {
+	var num, letter, special bool
+	for _, r := range password {
+		switch {
+		case unicode.IsDigit(r):
+			num = true
+		case unicode.IsLetter(r):
+			letter = true
+		case unicode.IsSymbol(r), unicode.IsPunct(r):
+			special = true
+		}
+	}
+
+	return (num || letter) && !special
+}
+