Merge pull request #28 from joeybloggs/v5

changes in preparation for package rename to validator

README.md

@@ -1,29 +1,30 @@
 Package go-validate-yourself
 ================
-[![Build Status](https://travis-ci.org/bluesuncorp/go-validate-yourself.svg?branch=v4)](https://travis-ci.org/bluesuncorp/go-validate-yourself)
-[![GoDoc](https://godoc.org/gopkg.in/bluesuncorp/go-validate-yourself.v4?status.svg)](https://godoc.org/gopkg.in/bluesuncorp/go-validate-yourself.v4)
+[![Build Status](https://travis-ci.org/bluesuncorp/go-validate-yourself.svg?branch=v5)](https://travis-ci.org/bluesuncorp/go-validate-yourself)
+[![GoDoc](https://godoc.org/gopkg.in/bluesuncorp/go-validate-yourself.v5?status.svg)](https://godoc.org/gopkg.in/bluesuncorp/go-validate-yourself.v5)
 
 Package validator implements value validations for structs and individual fields based on tags.
+It is even capable of Cross Field and even Cross Field Cross Struct validation.
 
 Installation
 ============
 
 Just use go get.
 
-	go get gopkg.in/bluesuncorp/go-validate-yourself.v4
+	go get gopkg.in/bluesuncorp/go-validate-yourself.v5
 
 or to update
 
-	go get -u gopkg.in/bluesuncorp/go-validate-yourself.v4
+	go get -u gopkg.in/bluesuncorp/go-validate-yourself.v5
 
 And then just import the package into your own code.
 
-	import "gopkg.in/bluesuncorp/go-validate-yourself.v4"
+	import "gopkg.in/bluesuncorp/go-validate-yourself.v5"
 
 Usage
 =====
 
-Please see http://godoc.org/gopkg.in/bluesuncorp/go-validate-yourself.v4 for detailed usage docs.
+Please see http://godoc.org/gopkg.in/bluesuncorp/go-validate-yourself.v5 for detailed usage docs.
 
 Contributing
 ============

baked_in.go

@@ -11,7 +11,7 @@ import (
 // BakedInValidators is the default map of ValidationFunc
 // you can add, remove or even replace items to suite your needs,
 // or even disregard and use your own map if so desired.
-var BakedInValidators = map[string]ValidationFunc{
+var BakedInValidators = map[string]Func{
 	"required":    hasValue,
 	"len":         hasLengthOf,
 	"min":         hasMinOf,

doc.go

@@ -1,12 +1,12 @@
 /*
 Package validator implements value validations for structs and individual fields based on tags. It can also handle Cross Field validation and even Cross Field Cross Struct validation for nested structs.
 
-Built In Validator
+Validate
 
-	myValidator = validator.NewValidator("validate", validator.BakedInValidators)
+	validate := validator.New("validate", validator.BakedInValidators)
 
-	errs := myValidator.ValidateStruct(//your struct)
-	valErr := myValidator.ValidateFieldByTag(field, "omitempty,min=1,max=10")
+	errs := validate.Struct(//your struct)
+	valErr := validate.Field(field, "omitempty,min=1,max=10")
 
 A simple example usage:
 
@@ -25,17 +25,17 @@ A simple example usage:
 	}
 
 	// errs will contain a hierarchical list of errors
-	// using the StructValidationErrors struct
+	// using the StructErrors struct
 	// or nil if no errors exist
-	errs := myValidator.ValidateStruct(user)
+	errs := validate.Struct(user)
 
 	// in this case 1 error Name is required
 	errs.Struct will be "User"
 	errs.StructErrors will be empty <-- fields that were structs
-	errs.Errors will have 1 error of type FieldValidationError
+	errs.Errors will have 1 error of type FieldError
 
 	NOTE: Anonymous Structs - they don't have names so expect the Struct name
-	within StructValidationErrors to be blank.
+	within StructErrors to be blank.
 
 Error Handling
 
@@ -45,7 +45,7 @@ The error can be used like so
 	fieldErr.Field    // "Name"
 	fieldErr.ErrorTag // "required"
 
-Both StructValidationErrors and FieldValidationError implement the Error interface but it's
+Both StructErrors and FieldError implement the Error interface but it's
 intended use is for development + debugging, not a production error message.
 
 	fieldErr.Error() // Field validation for "Name" failed on the "required" tag
@@ -67,7 +67,7 @@ I needed to know the field and what validation failed so that I could provide an
 	}
 
 The hierarchical error structure is hard to work with sometimes.. Agreed Flatten function to the rescue!
-Flatten will return a map of FieldValidationError's but the field name will be namespaced.
+Flatten will return a map of FieldError's but the field name will be namespaced.
 
 	// if UserDetail Details field failed validation
 	Field will be "Sub.Details"
@@ -89,7 +89,7 @@ Custom functions can be added
 		return true
 	}
 
-	myValidator.AddFunction("custom tag name", customFunc)
+	validate.AddFunction("custom tag name", customFunc)
 	// NOTES: using the same tag name as an existing function
 	//        will overwrite the existing one
 
@@ -97,11 +97,11 @@ Cross Field Validation
 
 Cross Field Validation can be implemented, for example Start & End Date range validation
 
-	// NOTE: when calling myValidator.validateStruct(val) val will be the top level struct passed
+	// NOTE: when calling validate.Struct(val) val will be the top level struct passed
 	//       into the function
-	//       when calling myValidator.ValidateFieldByTagAndValue(val, field, tag) val will be
+	//       when calling validate.FieldWithValue(val, field, tag) val will be
 	//       whatever you pass, struct, field...
-	//       when calling myValidator.ValidateFieldByTag(field, tag) val will be nil
+	//       when calling validate.Field(field, tag) val will be nil
 	//
 	// Because of the specific requirements and field names within each persons project that
 	// uses this library it is likely that custom functions will need to be created for your
@@ -225,29 +225,29 @@ Here is a list of the current built in validators:
 		Only valid for Numbers and time.Time types, this will validate the field value
 		against another fields value either within a struct or passed in field.
 		usage examples are for validation of a Start and End date:
-		Validation on End field using ValidateByStruct Usage(gtfield=Start)
-		Validating by field ValidateFieldByTagAndValue(start, end, "gtfield")
+		Validation on End field using validate.Struct Usage(gtfield=Start)
+		Validating by field validate.FieldWithValue(start, end, "gtfield")
 
 	gtefield
 		Only valid for Numbers and time.Time types, this will validate the field value
 		against another fields value either within a struct or passed in field.
 		usage examples are for validation of a Start and End date:
-		Validation on End field using ValidateByStruct Usage(gtefield=Start)
-		Validating by field ValidateFieldByTagAndValue(start, end, "gtefield")
+		Validation on End field using validate.Struct Usage(gtefield=Start)
+		Validating by field validate.FieldWithValue(start, end, "gtefield")
 
 	ltfield
 		Only valid for Numbers and time.Time types, this will validate the field value
 		against another fields value either within a struct or passed in field.
 		usage examples are for validation of a Start and End date:
-		Validation on End field using ValidateByStruct Usage(ltfield=Start)
-		Validating by field ValidateFieldByTagAndValue(start, end, "ltfield")
+		Validation on End field using validate.Struct Usage(ltfield=Start)
+		Validating by field validate.FieldWithValue(start, end, "ltfield")
 
 	ltefield
 		Only valid for Numbers and time.Time types, this will validate the field value
 		against another fields value either within a struct or passed in field.
 		usage examples are for validation of a Start and End date:
-		Validation on End field using ValidateByStruct Usage(ltefield=Start)
-		Validating by field ValidateFieldByTagAndValue(start, end, "ltefield")
+		Validation on End field using validate.Struct Usage(ltefield=Start)
+		Validating by field validate.FieldWithValue(start, end, "ltefield")
 
 	alpha
 		This validates that a strings value contains alpha characters only
@@ -329,6 +329,6 @@ This package panics when bad input is provided, this is by design, bad code like
 		TestField: "Test"
 	}
 
-	myValidator.ValidateStruct(t) // this will panic
+	validate.Struct(t) // this will panic
 */
 package validator

validator.go

@@ -2,7 +2,7 @@
  * Package validator
  *
  * MISC:
- * - anonymous structs - they don't have names so expect the Struct name within StructValidationErrors to be blank
+ * - anonymous structs - they don't have names so expect the Struct name within StructErrors to be blank
  *
  */
 
@@ -25,15 +25,15 @@ const (
 	tagKeySeparator = "="
 	structOnlyTag   = "structonly"
 	omitempty       = "omitempty"
-	validationFieldErrMsg  = "Field validation for \"%s\" failed on the \"%s\" tag\n"
-	validationStructErrMsg = "Struct:%s\n"
+	fieldErrMsg     = "Field validation for \"%s\" failed on the \"%s\" tag\n"
+	structErrMsg    = "Struct:%s\n"
 )
 
-// FieldValidationError contains a single field's validation error along
+// FieldError contains a single field's validation error along
 // with other properties that may be needed for error message creation
-type FieldValidationError struct {
+type FieldError struct {
 	Field string
-	ErrorTag string
+	Tag   string
 	Kind  reflect.Kind
 	Type  reflect.Type
 	Param string
@@ -41,27 +41,27 @@ type FieldValidationError struct {
 }
 
 // This is intended for use in development + debugging and not intended to be a production error message.
-// it also allows FieldValidationError to be used as an Error interface
-func (e *FieldValidationError) Error() string {
-	return fmt.Sprintf(validationFieldErrMsg, e.Field, e.ErrorTag)
+// it also allows FieldError to be used as an Error interface
+func (e *FieldError) Error() string {
+	return fmt.Sprintf(fieldErrMsg, e.Field, e.Tag)
 }
 
-// StructValidationErrors is hierarchical list of field and struct validation errors
-// for a non hierarchical representation please see the Flatten method for StructValidationErrors
-type StructValidationErrors struct {
+// StructErrors is hierarchical list of field and struct validation errors
+// for a non hierarchical representation please see the Flatten method for StructErrors
+type StructErrors struct {
 	// Name of the Struct
 	Struct string
 	// Struct Field Errors
-	Errors map[string]*FieldValidationError
+	Errors map[string]*FieldError
 	// Struct Fields of type struct and their errors
 	// key = Field Name of current struct, but internally Struct will be the actual struct name unless anonymous struct, it will be blank
-	StructErrors map[string]*StructValidationErrors
+	StructErrors map[string]*StructErrors
 }
 
 // This is intended for use in development + debugging and not intended to be a production error message.
-// it also allows StructValidationErrors to be used as an Error interface
-func (e *StructValidationErrors) Error() string {
-	buff := bytes.NewBufferString(fmt.Sprintf(validationStructErrMsg, e.Struct))
+// it also allows StructErrors to be used as an Error interface
+func (e *StructErrors) Error() string {
+	buff := bytes.NewBufferString(fmt.Sprintf(structErrMsg, e.Struct))
 
 	for _, err := range e.Errors {
 		buff.WriteString(err.Error())
@@ -74,15 +74,15 @@ func (e *StructValidationErrors) Error() string {
 	return buff.String()
 }
 
-// Flatten flattens the StructValidationErrors hierarchical structure into a flat namespace style field name
+// Flatten flattens the StructErrors hierarchical structure into a flat namespace style field name
 // for those that want/need it
-func (e *StructValidationErrors) Flatten() map[string]*FieldValidationError {
+func (e *StructErrors) Flatten() map[string]*FieldError {
 
 	if e == nil {
 		return nil
 	}
 
-	errs := map[string]*FieldValidationError{}
+	errs := map[string]*FieldError{}
 
 	for _, f := range e.Errors {
 
@@ -103,27 +103,27 @@ func (e *StructValidationErrors) Flatten() map[string]*FieldValidationError {
 	return errs
 }
 
-// ValidationFunc accepts all values needed for file and cross field validation
+// Func accepts all values needed for file and cross field validation
 // top     = top level struct when validating by struct otherwise nil
 // current = current level struct when validating by struct otherwise optional comparison value
 // f       = field value for validation
 // param   = parameter used in validation i.e. gt=0 param would be 0
-type ValidationFunc func(top interface{}, current interface{}, f interface{}, param string) bool
+type Func func(top interface{}, current interface{}, f interface{}, param string) bool
 
-// Validator implements the Validator Struct
+// Validate implements the Validate Struct
 // NOTE: Fields within are not thread safe and that is on purpose
 // Functions and Tags should all be predifined before use, so subscribe to the philosiphy
 // or make it thread safe on your end
-type Validator struct {
+type Validate struct {
 	// tagName being used.
 	tagName string
-	// validationFuncs is a map of validation functions and the tag keys
-	validationFuncs map[string]ValidationFunc
+	// validateFuncs is a map of validation functions and the tag keys
+	validationFuncs map[string]Func
 }
 
-// NewValidator creates a new Validator instance for use.
-func NewValidator(tagName string, funcs map[string]ValidationFunc) *Validator {
-	return &Validator{
+// New creates a new Validate instance for use.
+func New(tagName string, funcs map[string]Func) *Validate {
+	return &Validate{
 		tagName:         tagName,
 		validationFuncs: funcs,
 	}
@@ -131,13 +131,13 @@ func NewValidator(tagName string, funcs map[string]ValidationFunc) *Validator {
 
 // SetTag sets tagName of the Validator to one of your choosing after creation
 // perhaps to dodge a tag name conflict in a specific section of code
-func (v *Validator) SetTag(tagName string) {
+func (v *Validate) SetTag(tagName string) {
 	v.tagName = tagName
 }
 
-// AddFunction adds a ValidationFunc to a Validator's map of validators denoted by the key
+// AddFunction adds a validation Func to a Validate's map of validators denoted by the key
 // NOTE: if the key already exists, it will get replaced.
-func (v *Validator) AddFunction(key string, f ValidationFunc) error {
+func (v *Validate) AddFunction(key string, f Func) error {
 
 	if len(key) == 0 {
 		return errors.New("Function Key cannot be empty")
@@ -152,34 +152,34 @@ func (v *Validator) AddFunction(key string, f ValidationFunc) error {
 	return nil
 }
 
-// ValidateStruct validates a struct, even it's nested structs, and returns a struct containing the errors
+// Struct validates a struct, even it's nested structs, and returns a struct containing the errors
 // NOTE: Nested Arrays, or Maps of structs do not get validated only the Array or Map itself; the reason is that there is no good
 // way to represent or report which struct within the array has the error, besides can validate the struct prior to adding it to
 // the Array or Map.
-func (v *Validator) ValidateStruct(s interface{}) *StructValidationErrors {
+func (v *Validate) Struct(s interface{}) *StructErrors {
 
-	return v.validateStructRecursive(s, s, s)
+	return v.structRecursive(s, s, s)
 }
 
-// validateStructRecursive validates a struct recursivly and passes the top level and current struct around for use in validator functions and returns a struct containing the errors
-func (v *Validator) validateStructRecursive(top interface{}, current interface{}, s interface{}) *StructValidationErrors {
+// structRecursive validates a struct recursivly and passes the top level and current struct around for use in validator functions and returns a struct containing the errors
+func (v *Validate) structRecursive(top interface{}, current interface{}, s interface{}) *StructErrors {
 
 	structValue := reflect.ValueOf(s)
 	structType := reflect.TypeOf(s)
 	structName := structType.Name()
 
 	if structValue.Kind() == reflect.Ptr && !structValue.IsNil() {
-		return v.validateStructRecursive(top, current, structValue.Elem().Interface())
+		return v.structRecursive(top, current, structValue.Elem().Interface())
 	}
 
 	if structValue.Kind() != reflect.Struct && structValue.Kind() != reflect.Interface {
 		panic("interface passed for validation is not a struct")
 	}
 
-	validationErrors := &StructValidationErrors{
+	validationErrors := &StructErrors{
 		Struct:       structName,
-		Errors:       map[string]*FieldValidationError{},
-		StructErrors: map[string]*StructValidationErrors{},
+		Errors:       map[string]*FieldError{},
+		StructErrors: map[string]*StructErrors{},
 	}
 
 	var numFields = structValue.NumField()
@@ -214,7 +214,7 @@ func (v *Validator) validateStructRecursive(top interface{}, current interface{}
 
 			if valueField.Type() == reflect.TypeOf(time.Time{}) {
 
-				if fieldError := v.validateFieldByNameAndTagAndValue(top, current, valueField.Interface(), typeField.Name, tag); fieldError != nil {
+				if fieldError := v.fieldWithNameAndValue(top, current, valueField.Interface(), typeField.Name, tag); fieldError != nil {
 					validationErrors.Errors[fieldError.Field] = fieldError
 					// free up memory reference
 					fieldError = nil
@@ -226,7 +226,7 @@ func (v *Validator) validateStructRecursive(top interface{}, current interface{}
 					continue
 				}
 
-				if structErrors := v.validateStructRecursive(top, valueField.Interface(), valueField.Interface()); structErrors != nil {
+				if structErrors := v.structRecursive(top, valueField.Interface(), valueField.Interface()); structErrors != nil {
 					validationErrors.StructErrors[typeField.Name] = structErrors
 					// free up memory map no longer needed
 					structErrors = nil
@@ -235,7 +235,7 @@ func (v *Validator) validateStructRecursive(top interface{}, current interface{}
 
 		default:
 
-			if fieldError := v.validateFieldByNameAndTagAndValue(top, current, valueField.Interface(), typeField.Name, tag); fieldError != nil {
+			if fieldError := v.fieldWithNameAndValue(top, current, valueField.Interface(), typeField.Name, tag); fieldError != nil {
 				validationErrors.Errors[fieldError.Field] = fieldError
 				// free up memory reference
 				fieldError = nil
@@ -250,21 +250,21 @@ func (v *Validator) validateStructRecursive(top interface{}, current interface{}
 	return validationErrors
 }
 
-// ValidateFieldByTag allows validation of a single field, still using tag style validation to check multiple errors
-func (v *Validator) ValidateFieldByTag(f interface{}, tag string) *FieldValidationError {
+// Field allows validation of a single field, still using tag style validation to check multiple errors
+func (v *Validate) Field(f interface{}, tag string) *FieldError {
 
-	return v.ValidateFieldByTagAndValue(nil, f, tag)
+	return v.FieldWithValue(nil, f, tag)
 }
 
-// ValidateFieldByTagAndValue allows validation of a single field, possibly even against another fields value, still using tag style validation to check multiple errors
-func (v *Validator) ValidateFieldByTagAndValue(val interface{}, f interface{}, tag string) *FieldValidationError {
+// FieldWithValue allows validation of a single field, possibly even against another fields value, still using tag style validation to check multiple errors
+func (v *Validate) FieldWithValue(val interface{}, f interface{}, tag string) *FieldError {
 
-	return v.validateFieldByNameAndTagAndValue(nil, val, f, "", tag)
+	return v.fieldWithNameAndValue(nil, val, f, "", tag)
 }
 
-func (v *Validator) validateFieldByNameAndTagAndValue(val interface{}, current interface{}, f interface{}, name string, tag string) *FieldValidationError {
+func (v *Validate) fieldWithNameAndValue(val interface{}, current interface{}, f interface{}, name string, tag string) *FieldError {
 
-	// This is a double check if coming from ValidateStruct but need to be here in case function is called directly
+	// This is a double check if coming from validate.Struct but need to be here in case function is called directly
 	if tag == noValidationTag {
 		return nil
 	}
@@ -277,7 +277,7 @@ func (v *Validator) validateFieldByNameAndTagAndValue(val interface{}, current i
 	fieldKind := valueField.Kind()
 
 	if fieldKind == reflect.Ptr && !valueField.IsNil() {
-		return v.validateFieldByNameAndTagAndValue(val, current, valueField.Elem().Interface(), name, tag)
+		return v.fieldWithNameAndValue(val, current, valueField.Elem().Interface(), name, tag)
 	}
 
 	fieldType := valueField.Type()
@@ -291,7 +291,7 @@ func (v *Validator) validateFieldByNameAndTagAndValue(val interface{}, current i
 		}
 	}
 
-	var valErr *FieldValidationError
+	var valErr *FieldError
 	var err error
 	valTags := strings.Split(tag, tagSeparator)
 
@@ -305,25 +305,25 @@ func (v *Validator) validateFieldByNameAndTagAndValue(val interface{}, current i
 
 			for _, val := range orVals {
 
-				valErr, err = v.validateFieldByNameAndSingleTag(val, current, f, name, val)
+				valErr, err = v.fieldWithNameAndSingleTag(val, current, f, name, val)
 
 				if err == nil {
 					return nil
 				}
 
-				errTag += orSeparator + valErr.ErrorTag
+				errTag += orSeparator + valErr.Tag
 
 			}
 
 			errTag = strings.TrimLeft(errTag, orSeparator)
 
-			valErr.ErrorTag = errTag
+			valErr.Tag = errTag
 			valErr.Kind = fieldKind
 
 			return valErr
 		}
 
-		if valErr, err = v.validateFieldByNameAndSingleTag(val, current, f, name, valTag); err != nil {
+		if valErr, err = v.fieldWithNameAndSingleTag(val, current, f, name, valTag); err != nil {
 
 			valErr.Kind = valueField.Kind()
 			valErr.Type = fieldType
@@ -335,7 +335,7 @@ func (v *Validator) validateFieldByNameAndTagAndValue(val interface{}, current i
 	return nil
 }
 
-func (v *Validator) validateFieldByNameAndSingleTag(val interface{}, current interface{}, f interface{}, name string, valTag string) (*FieldValidationError, error) {
+func (v *Validate) fieldWithNameAndSingleTag(val interface{}, current interface{}, f interface{}, name string, valTag string) (*FieldError, error) {
 
 	vals := strings.Split(valTag, tagKeySeparator)
 	key := strings.Trim(vals[0], " ")
@@ -344,9 +344,9 @@ func (v *Validator) validateFieldByNameAndSingleTag(val interface{}, current int
 		panic(fmt.Sprintf("Invalid validation tag on field %s", name))
 	}
 
-	valErr := &FieldValidationError{
+	valErr := &FieldError{
 		Field: name,
-		ErrorTag: key,
+		Tag:   key,
 		Value: f,
 		Param: "",
 	}