Add alpha_space and fix typo (#42)

* Changed from max to min in the README.md. Seems to have been a typo. (#38)

*  Fixed a couple of typos. (#39)

* Changed from max to min in the README.md. Seems to have been a typo.

* Fixed a couple of typos.

*  Add new rule alpha_space (#41)

* Add new rule alpha_space

* use gofmt

* Fix typo

Author: thedevsaddam

README.md

@@ -127,6 +127,7 @@ Send request to the server using curl or postman: `curl GET "http://localhost:90
 ### Validation Rules
 * `alpha` The field under validation must be entirely alphabetic characters.
 * `alpha_dash` The field under validation may have alpha-numeric characters, as well as dashes and underscores.
+* `alpha_space` The field under validation may have alpha-numeric characters, as well as dashes, underscores and space.
 * `alpha_num` The field under validation must be entirely alpha-numeric characters.
 * `between:numeric,numeric` The field under validation check the length of characters/ length of array, slice, map/ range between two integer or float number etc.
 * `numeric` The field under validation must be entirely numeric characters.
@@ -145,7 +146,7 @@ Send request to the server using curl or postman: `curl GET "http://localhost:90
 * `not_in:foo,bar` The field under validation must have one value except foo,bar. e.g: `not_in:admin,manager,user` must not contain the values (admin or manager or user)
 * `email` The field under validation must have a valid email.
 * `float` The field under validation must have a valid float number.
-* `max:numeric` The field under validation must have a min length of characters for string, items length for slice/map, value for integer or float.
+* `min:numeric` The field under validation must have a min length of characters for string, items length for slice/map, value for integer or float.
    e.g: `min:3` may contains characters minimum length of 3 like `"john", "jane", "jane321"` but not `"mr", "xy"`
 * `max:numeric` The field under validation must have a max length of characters for string, items length for slice/map, value for integer or float.
    e.g: `max:6` may contains characters maximum length of 6 like `"john doe", "jane doe"` but not `"john", "jane"`

doc/SIMPLE_STRUCT_VALIDATION.md

@@ -42,7 +42,7 @@ func handler(w http.ResponseWriter, r *http.Request) {
 	e := v.ValidateJSON()
 	fmt.Println(user) // your incoming JSON data in Go data struct
 	err := map[string]interface{}{"validationError": e}
-	w.Header().Set("Content-type", "applciation/json")
+	w.Header().Set("Content-type", "application/json")
 	json.NewEncoder(w).Encode(err)
 }
 
@@ -53,7 +53,7 @@ func main() {
 }
 
 ```
-***Resposne***
+***Response***
 ```json
 {
     "validationError": {

helper.go

@@ -15,6 +15,11 @@ func isAlphaDash(str string) bool {
 	return regexAlphaDash.MatchString(str)
 }
 
+// isAlphaSpace check the input is letters, number with dash and underscore
+func isAlphaSpace(str string) bool {
+	return regexAlphaSpace.MatchString(str)
+}
+
 // isAlphaNumeric check the input is alpha numeric or not
 func isAlphaNumeric(str string) bool {
 	return regexAlphaNumeric.MatchString(str)

regex_patterns.go

@@ -5,11 +5,12 @@ import (
 )
 
 const (
-	// Alpha represents regular expression for alpha chartacters
+	// Alpha represents regular expression for alpha characters
 	Alpha string = "^[a-zA-Z]+$"
-	// AlphaDash represents regular expression for alpha chartacters with underscore and ash
-	AlphaDash string = "^[a-zA-Z0-9_-]+$"
-	// AlphaNumeric represents regular expression for alpha numeric chartacters
+	// AlphaDash represents regular expression for alpha characters with underscore and dash
+	AlphaDash  string = "^[a-zA-Z0-9_-]+$"
+	AlphaSpace string = "^[-a-zA-Z0-9_ ]+$"
+	// AlphaNumeric represents regular expression for alpha numeric characters
 	AlphaNumeric string = "^[a-zA-Z0-9]+$"
 	// CreditCard represents regular expression for credit cards like (Visa, MasterCard, American Express, Diners Club, Discover, and JCB cards). Ref: https://stackoverflow.com/questions/9315647/regex-credit-card-number-tests
 	CreditCard string = "^(?:4[0-9]{12}(?:[0-9]{3})?|[25][1-7][0-9]{14}|6(?:011|5[0-9][0-9])[0-9]{12}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|(?:2131|1800|35\\d{3})\\d{11})$"
@@ -23,7 +24,7 @@ const (
 	DateDDMMYY string = "^(0?[1-9]|[12][0-9]|3[01])[\\/\\-](0?[1-9]|1[012])[\\/\\-]\\d{4}$"
 	// Email represents regular expression for email
 	Email string = "^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+$"
-	// Float represents regular expression for finding fload number
+	// Float represents regular expression for finding float number
 	Float string = "^[+-]?([0-9]*[.])?[0-9]+$"
 	// IP represents regular expression for ip address
 	IP string = "^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$"
@@ -52,6 +53,7 @@ const (
 var (
 	regexAlpha        = regexp.MustCompile(Alpha)
 	regexAlphaDash    = regexp.MustCompile(AlphaDash)
+	regexAlphaSpace   = regexp.MustCompile(AlphaSpace)
 	regexAlphaNumeric = regexp.MustCompile(AlphaNumeric)
 	regexCreditCard   = regexp.MustCompile(CreditCard)
 	regexCoordinate   = regexp.MustCompile(Coordinate)

rules.go

@@ -194,6 +194,19 @@ func init() {
 		return nil
 	})
 
+	// AlphaDash check if provided field contains valid letters, numbers, underscore and dash
+	AddCustomRule("alpha_space", func(field string, vlaue string, message string, value interface{}) error {
+		str := toString(value)
+		err := fmt.Errorf("The %s may only contain letters, numbers, dashes, space", field)
+		if message != "" {
+			err = errors.New(message)
+		}
+		if !isAlphaSpace(str) {
+			return err
+		}
+		return nil
+	})
+
 	// AlphaNumeric check if provided field contains valid letters and numbers
 	AddCustomRule("alpha_num", func(field string, vlaue string, message string, value interface{}) error {
 		str := toString(value)

rules_test.go

@@ -232,6 +232,45 @@ func Test_AlphaDash(t *testing.T) {
 	}
 }
 
+func Test_AlphaSpace(t *testing.T) {
+	type user struct {
+		Name string `json:"name"`
+	}
+
+	postUser := user{Name: "999$"}
+	var userObj user
+
+	body, _ := json.Marshal(postUser)
+	req, _ := http.NewRequest("POST", "http://www.example.com", bytes.NewReader(body))
+
+	messages := MapData{
+		"name": []string{"alpha_space:custom_message"},
+	}
+
+	rules := MapData{
+		"name": []string{"alpha_space"},
+	}
+
+	opts := Options{
+		Request:  req,
+		Data:     &userObj,
+		Rules:    rules,
+		Messages: messages,
+	}
+
+	vd := New(opts)
+	validationErr := vd.ValidateJSON()
+	t.Log(len(validationErr))
+	if len(validationErr) != 1 {
+		t.Log(validationErr)
+		t.Error("alpha_space validation failed!")
+	}
+
+	if validationErr.Get("name") != "custom_message" {
+		t.Error("alpha space custom message failed!")
+	}
+}
+
 func Test_AlphaNumeric(t *testing.T) {
 	type user struct {
 		Name string `json:"name"`