initial working commit

baked_in.go

@@ -0,0 +1,18 @@
+package validator
+
+import (
+	"log"
+	"reflect"
+)
+
+var bakedInValidators = map[string]ValidationFunc{
+	"required": isRequired,
+}
+
+func isRequired(field interface{}, param string) bool {
+
+	log.Printf("Required:%s Valid:%t\n", field, field != nil && field != reflect.Zero(reflect.TypeOf(field)).Interface())
+	return field != nil && field != reflect.Zero(reflect.TypeOf(field)).Interface()
+
+	// return true
+}

validator.go

@@ -2,9 +2,10 @@ package validator
 
 import (
 	"errors"
-	"fmt"
 	"log"
 	"reflect"
+	"strings"
+	"unicode"
 )
 
 // FieldValidationError contains a single fields validation error
@@ -17,17 +18,18 @@ type FieldValidationError struct {
 // NOTE: if a field within a struct is a struct it's errors will not be contained within the current
 // StructValidationErrors but rather a new ArrayValidationErrors is created for each struct
 type StructValidationErrors struct {
-	Errors []FieldValidationError
+	Struct string
+	Errors []*FieldValidationError
 }
 
-// ArrayStructValidationErrors is a struct that contains a 2D flattened list of struct specific StructValidationErrors
-type ArrayStructValidationErrors struct {
-	// Key = Struct Name
-	Errors map[string][]StructValidationErrors
-}
+// // ArrayStructValidationErrors is a struct that contains a 2D flattened list of struct specific StructValidationErrors
+// type ArrayStructValidationErrors struct {
+// 	// Key = Struct Name
+// 	Errors map[string][]StructValidationErrors
+// }
 
 // ValidationFunc that accepts the value of a field and parameter for use in validation (parameter not always used or needed)
-type ValidationFunc func(v interface{}, param string) error
+type ValidationFunc func(v interface{}, param string) bool
 
 // Validator implements the Validator Struct
 // NOTE: Fields within are not thread safe and that is on purpose
@@ -40,7 +42,7 @@ type Validator struct {
 	validationFuncs map[string]ValidationFunc
 }
 
-var bakedInValidators = map[string]ValidationFunc{}
+// var bakedInValidators = map[string]ValidationFunc{}
 
 var internalValidator = NewValidator("validate", bakedInValidators)
 
@@ -89,17 +91,23 @@ func (v *Validator) AddFunction(key string, f ValidationFunc) error {
 	return nil
 }
 
-func ValidateStruct(s interface{}) ArrayStructValidationErrors {
+// ValidateStruct validates a struct and returns a struct containing the errors
+func ValidateStruct(s interface{}) []*StructValidationErrors {
 
 	return internalValidator.ValidateStruct(s)
 }
 
-func (v *Validator) ValidateStruct(s interface{}) ArrayStructValidationErrors {
-
-	var errorStruct = ArrayStructValidationErrors{}
+// ValidateStruct validates a struct and returns a struct containing the errors
+func (v *Validator) ValidateStruct(s interface{}) []*StructValidationErrors {
 
+	errorArray := []*StructValidationErrors{}
 	structValue := reflect.ValueOf(s)
 	structType := reflect.TypeOf(s)
+	structName := structType.Name()
+
+	var currentStructError = &StructValidationErrors{
+		Struct: structName,
+	}
 
 	if structValue.Kind() == reflect.Ptr && !structValue.IsNil() {
 		return v.ValidateStruct(structValue.Elem().Interface())
@@ -120,8 +128,179 @@ func (v *Validator) ValidateStruct(s interface{}) ArrayStructValidationErrors {
 			valueField = valueField.Elem()
 		}
 
-		fmt.Println(typeField.Name)
+		tag := typeField.Tag.Get(v.tagName)
+
+		if tag == "-" {
+			continue
+		}
+
+		// if no validation and not a struct (which may containt fields for validation)
+		if tag == "" && valueField.Kind() != reflect.Struct {
+			continue
+		}
+
+		switch valueField.Kind() {
+
+		case reflect.Struct:
+
+			if !unicode.IsUpper(rune(typeField.Name[0])) {
+				continue
+			}
+
+			if structErrors := v.ValidateStruct(valueField.Interface()); structErrors != nil {
+				errorArray = append(errorArray, structErrors...)
+			}
+
+		default:
+
+			if fieldError := v.validateStructFieldByTag(valueField.Interface(), typeField.Name, tag); fieldError != nil {
+				currentStructError.Errors = append(currentStructError.Errors, fieldError)
+			}
+		}
+	}
+
+	if currentStructError.Errors != nil {
+		errorArray = append(errorArray, currentStructError)
+	}
+
+	if len(errorArray) == 0 {
+		return nil
+	}
+
+	return errorArray
+}
+
+// ValidateFieldWithTag validates the given field by the given tag arguments
+func (v *Validator) validateStructFieldByTag(f interface{}, name string, tag string) *FieldValidationError {
+
+	// // This is a double check if coming from ValidateStruct but need to be here in case function is called directly
+	// if tag == "-" {
+	// 	return nil
+	// }
+	//
+	// valueField := reflect.ValueOf(f)
+	//
+	// if valueField.Kind() == reflect.Ptr && !valueField.IsNil() {
+	// 	return v.validateStructFieldByTag(valueField.Elem().Interface(), name, tag)
+	// }
+	//
+	// // fmt.Println(typeField.Name)
+	//
+	// switch valueField.Kind() {
+	//
+	// case reflect.Struct, reflect.Invalid:
+	// 	log.Fatal("Invalid field passed to ValidateFieldWithTag")
+	// }
+	//
+	// // typeField := reflect.TypeOf(f)
+	// // name := ""
+	// valTags := strings.Split(tag, ",")
+	//
+	// for _, valTag := range valTags {
+	//
+	// 	vals := strings.Split(valTag, "=")
+	// 	key := strings.Trim(vals[0], " ")
+	//
+	// 	if len(key) == 0 {
+	// 		log.Fatalf("Invalid validation tag on field %s", name)
+	// 	}
+	//
+	// 	valFunc := v.validationFuncs[key]
+	// 	if valFunc == nil {
+	// 		log.Fatalf("Undefined validation function on field %s", name)
+	// 	}
+	//
+	// 	param := ""
+	// 	if len(vals) > 1 {
+	// 		param = strings.Trim(vals[1], " ")
+	// 	}
+	//
+	// 	if err := valFunc(f, param); !err {
+	//
+	// 		return &FieldValidationError{
+	// 			Field:    name,
+	// 			ErrorTag: key,
+	// 		}
+	// 	}
+	//
+	// }
+	//
+	// return nil
+	//
+	//
+
+	if err := v.validateFieldByNameAndTag(f, name, tag); err != nil {
+		return &FieldValidationError{
+			Field:    name,
+			ErrorTag: err.Error(),
+		}
+	}
+
+	return nil
+}
+
+// ValidateFieldByTag allows validation of a single field with the internal validator, still using tag style validation to check multiple errors
+func ValidateFieldByTag(f interface{}, tag string) error {
+
+	return internalValidator.validateFieldByNameAndTag(f, "", tag)
+}
+
+// ValidateFieldByTag allows validation of a single field, still using tag style validation to check multiple errors
+func (v *Validator) ValidateFieldByTag(f interface{}, tag string) error {
+
+	return v.validateFieldByNameAndTag(f, "", tag)
+}
+
+func (v *Validator) validateFieldByNameAndTag(f interface{}, name string, tag string) error {
+
+	// This is a double check if coming from ValidateStruct but need to be here in case function is called directly
+	if tag == "-" {
+		return nil
+	}
+
+	valueField := reflect.ValueOf(f)
+
+	if valueField.Kind() == reflect.Ptr && !valueField.IsNil() {
+		return v.ValidateFieldByTag(valueField.Elem().Interface(), tag)
+	}
+
+	// fmt.Println(typeField.Name)
+
+	switch valueField.Kind() {
+
+	case reflect.Struct, reflect.Invalid:
+		log.Fatal("Invalid field passed to ValidateFieldWithTag")
+	}
+
+	// typeField := reflect.TypeOf(f)
+	// name := ""
+	valTags := strings.Split(tag, ",")
+
+	for _, valTag := range valTags {
+
+		vals := strings.Split(valTag, "=")
+		key := strings.Trim(vals[0], " ")
+
+		if len(key) == 0 {
+			log.Fatalf("Invalid validation tag on field %s", name)
+		}
+
+		valFunc := v.validationFuncs[key]
+		if valFunc == nil {
+			log.Fatalf("Undefined validation function on field %s", name)
+		}
+
+		param := ""
+		if len(vals) > 1 {
+			param = strings.Trim(vals[1], " ")
+		}
+
+		if err := valFunc(f, param); !err {
+
+			return errors.New(key)
+		}
+
 	}
 
-	return errorStruct
+	return nil
 }

validator_test.go

@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"testing"
 
-	"gopkg.in/joeybloggs/go-validate-yourself.v0"
+	"github.com/joeybloggs/go-validate-yourself"
 )
 
 type UserDetails struct {
@@ -19,13 +19,38 @@ type User struct {
 func TestValidateStruct(t *testing.T) {
 
 	u := &User{
-		FirstName: "Dean Karn",
+		FirstName: "",
 		Details: &UserDetails{
-			"26 Here Blvd.",
+			"",
 		},
 	}
 
 	errors := validator.ValidateStruct(u)
 
-	fmt.Println(errors)
+	fmt.Println(errors == nil)
+
+	for _, i := range errors {
+		fmt.Printf("Error Struct:%s\n", i.Struct)
+
+		for _, j := range i.Errors {
+
+			fmt.Printf("Error Field:%s Error Tag:%s\n", j.Field, j.ErrorTag)
+		}
+	}
+
 }
+
+// func TestValidateField(t *testing.T) {
+//
+// 	u := &User{
+// 		FirstName: "Dean Karn",
+// 		Details: &UserDetails{
+// 			"26 Here Blvd.",
+// 		},
+// 	}
+//
+// 	err := validator.ValidateFieldByTag(u.FirstName, "required")
+//
+// 	fmt.Println(err == nil)
+// 	fmt.Println(err)
+// }