Use vendored go-swagger (#8087)

* Use vendored go-swagger

* vendor go-swagger

* revert un wanteed change

* remove un-needed GO111MODULE

* Update Makefile

Co-Authored-By: techknowlogick <matti@mdranta.net>

vendor/github.com/go-openapi/validate/validator.go

@@ -0,0 +1,641 @@
+// Copyright 2015 go-swagger maintainers
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package validate
+
+import (
+	"fmt"
+	"reflect"
+
+	"github.com/go-openapi/errors"
+	"github.com/go-openapi/spec"
+	"github.com/go-openapi/strfmt"
+)
+
+// An EntityValidator is an interface for things that can validate entities
+type EntityValidator interface {
+	Validate(interface{}) *Result
+}
+
+type valueValidator interface {
+	SetPath(path string)
+	Applies(interface{}, reflect.Kind) bool
+	Validate(interface{}) *Result
+}
+
+type itemsValidator struct {
+	items        *spec.Items
+	root         interface{}
+	path         string
+	in           string
+	validators   []valueValidator
+	KnownFormats strfmt.Registry
+}
+
+func newItemsValidator(path, in string, items *spec.Items, root interface{}, formats strfmt.Registry) *itemsValidator {
+	iv := &itemsValidator{path: path, in: in, items: items, root: root, KnownFormats: formats}
+	iv.validators = []valueValidator{
+		&typeValidator{
+			Type:     spec.StringOrArray([]string{items.Type}),
+			Nullable: items.Nullable,
+			Format:   items.Format,
+			In:       in,
+			Path:     path,
+		},
+		iv.stringValidator(),
+		iv.formatValidator(),
+		iv.numberValidator(),
+		iv.sliceValidator(),
+		iv.commonValidator(),
+	}
+	return iv
+}
+
+func (i *itemsValidator) Validate(index int, data interface{}) *Result {
+	tpe := reflect.TypeOf(data)
+	kind := tpe.Kind()
+	mainResult := new(Result)
+	path := fmt.Sprintf("%s.%d", i.path, index)
+
+	for _, validator := range i.validators {
+		validator.SetPath(path)
+		if validator.Applies(i.root, kind) {
+			result := validator.Validate(data)
+			mainResult.Merge(result)
+			mainResult.Inc()
+			if result != nil && result.HasErrors() {
+				return mainResult
+			}
+		}
+	}
+	return mainResult
+}
+
+func (i *itemsValidator) commonValidator() valueValidator {
+	return &basicCommonValidator{
+		In:      i.in,
+		Default: i.items.Default,
+		Enum:    i.items.Enum,
+	}
+}
+
+func (i *itemsValidator) sliceValidator() valueValidator {
+	return &basicSliceValidator{
+		In:           i.in,
+		Default:      i.items.Default,
+		MaxItems:     i.items.MaxItems,
+		MinItems:     i.items.MinItems,
+		UniqueItems:  i.items.UniqueItems,
+		Source:       i.root,
+		Items:        i.items.Items,
+		KnownFormats: i.KnownFormats,
+	}
+}
+
+func (i *itemsValidator) numberValidator() valueValidator {
+	return &numberValidator{
+		In:               i.in,
+		Default:          i.items.Default,
+		MultipleOf:       i.items.MultipleOf,
+		Maximum:          i.items.Maximum,
+		ExclusiveMaximum: i.items.ExclusiveMaximum,
+		Minimum:          i.items.Minimum,
+		ExclusiveMinimum: i.items.ExclusiveMinimum,
+		Type:             i.items.Type,
+		Format:           i.items.Format,
+	}
+}
+
+func (i *itemsValidator) stringValidator() valueValidator {
+	return &stringValidator{
+		In:              i.in,
+		Default:         i.items.Default,
+		MaxLength:       i.items.MaxLength,
+		MinLength:       i.items.MinLength,
+		Pattern:         i.items.Pattern,
+		AllowEmptyValue: false,
+	}
+}
+
+func (i *itemsValidator) formatValidator() valueValidator {
+	return &formatValidator{
+		In: i.in,
+		//Default:      i.items.Default,
+		Format:       i.items.Format,
+		KnownFormats: i.KnownFormats,
+	}
+}
+
+type basicCommonValidator struct {
+	Path    string
+	In      string
+	Default interface{}
+	Enum    []interface{}
+}
+
+func (b *basicCommonValidator) SetPath(path string) {
+	b.Path = path
+}
+
+func (b *basicCommonValidator) Applies(source interface{}, kind reflect.Kind) bool {
+	switch source.(type) {
+	case *spec.Parameter, *spec.Schema, *spec.Header:
+		return true
+	}
+	return false
+}
+
+func (b *basicCommonValidator) Validate(data interface{}) (res *Result) {
+	if len(b.Enum) > 0 {
+		for _, enumValue := range b.Enum {
+			actualType := reflect.TypeOf(enumValue)
+			if actualType != nil { // Safeguard
+				expectedValue := reflect.ValueOf(data)
+				if expectedValue.IsValid() && expectedValue.Type().ConvertibleTo(actualType) {
+					if reflect.DeepEqual(expectedValue.Convert(actualType).Interface(), enumValue) {
+						return nil
+					}
+				}
+			}
+		}
+		return errorHelp.sErr(errors.EnumFail(b.Path, b.In, data, b.Enum))
+	}
+	return nil
+}
+
+// A HeaderValidator has very limited subset of validations to apply
+type HeaderValidator struct {
+	name         string
+	header       *spec.Header
+	validators   []valueValidator
+	KnownFormats strfmt.Registry
+}
+
+// NewHeaderValidator creates a new header validator object
+func NewHeaderValidator(name string, header *spec.Header, formats strfmt.Registry) *HeaderValidator {
+	p := &HeaderValidator{name: name, header: header, KnownFormats: formats}
+	p.validators = []valueValidator{
+		&typeValidator{
+			Type:     spec.StringOrArray([]string{header.Type}),
+			Nullable: header.Nullable,
+			Format:   header.Format,
+			In:       "header",
+			Path:     name,
+		},
+		p.stringValidator(),
+		p.formatValidator(),
+		p.numberValidator(),
+		p.sliceValidator(),
+		p.commonValidator(),
+	}
+	return p
+}
+
+// Validate the value of the header against its schema
+func (p *HeaderValidator) Validate(data interface{}) *Result {
+	result := new(Result)
+	tpe := reflect.TypeOf(data)
+	kind := tpe.Kind()
+
+	for _, validator := range p.validators {
+		if validator.Applies(p.header, kind) {
+			if err := validator.Validate(data); err != nil {
+				result.Merge(err)
+				if err.HasErrors() {
+					return result
+				}
+			}
+		}
+	}
+	return nil
+}
+
+func (p *HeaderValidator) commonValidator() valueValidator {
+	return &basicCommonValidator{
+		Path:    p.name,
+		In:      "response",
+		Default: p.header.Default,
+		Enum:    p.header.Enum,
+	}
+}
+
+func (p *HeaderValidator) sliceValidator() valueValidator {
+	return &basicSliceValidator{
+		Path:         p.name,
+		In:           "response",
+		Default:      p.header.Default,
+		MaxItems:     p.header.MaxItems,
+		MinItems:     p.header.MinItems,
+		UniqueItems:  p.header.UniqueItems,
+		Items:        p.header.Items,
+		Source:       p.header,
+		KnownFormats: p.KnownFormats,
+	}
+}
+
+func (p *HeaderValidator) numberValidator() valueValidator {
+	return &numberValidator{
+		Path:             p.name,
+		In:               "response",
+		Default:          p.header.Default,
+		MultipleOf:       p.header.MultipleOf,
+		Maximum:          p.header.Maximum,
+		ExclusiveMaximum: p.header.ExclusiveMaximum,
+		Minimum:          p.header.Minimum,
+		ExclusiveMinimum: p.header.ExclusiveMinimum,
+		Type:             p.header.Type,
+		Format:           p.header.Format,
+	}
+}
+
+func (p *HeaderValidator) stringValidator() valueValidator {
+	return &stringValidator{
+		Path:            p.name,
+		In:              "response",
+		Default:         p.header.Default,
+		Required:        true,
+		MaxLength:       p.header.MaxLength,
+		MinLength:       p.header.MinLength,
+		Pattern:         p.header.Pattern,
+		AllowEmptyValue: false,
+	}
+}
+
+func (p *HeaderValidator) formatValidator() valueValidator {
+	return &formatValidator{
+		Path: p.name,
+		In:   "response",
+		//Default:      p.header.Default,
+		Format:       p.header.Format,
+		KnownFormats: p.KnownFormats,
+	}
+}
+
+// A ParamValidator has very limited subset of validations to apply
+type ParamValidator struct {
+	param        *spec.Parameter
+	validators   []valueValidator
+	KnownFormats strfmt.Registry
+}
+
+// NewParamValidator creates a new param validator object
+func NewParamValidator(param *spec.Parameter, formats strfmt.Registry) *ParamValidator {
+	p := &ParamValidator{param: param, KnownFormats: formats}
+	p.validators = []valueValidator{
+		&typeValidator{
+			Type:     spec.StringOrArray([]string{param.Type}),
+			Nullable: param.Nullable,
+			Format:   param.Format,
+			In:       param.In,
+			Path:     param.Name,
+		},
+		p.stringValidator(),
+		p.formatValidator(),
+		p.numberValidator(),
+		p.sliceValidator(),
+		p.commonValidator(),
+	}
+	return p
+}
+
+// Validate the data against the description of the parameter
+func (p *ParamValidator) Validate(data interface{}) *Result {
+	result := new(Result)
+	tpe := reflect.TypeOf(data)
+	kind := tpe.Kind()
+
+	// TODO: validate type
+	for _, validator := range p.validators {
+		if validator.Applies(p.param, kind) {
+			if err := validator.Validate(data); err != nil {
+				result.Merge(err)
+				if err.HasErrors() {
+					return result
+				}
+			}
+		}
+	}
+	return nil
+}
+
+func (p *ParamValidator) commonValidator() valueValidator {
+	return &basicCommonValidator{
+		Path:    p.param.Name,
+		In:      p.param.In,
+		Default: p.param.Default,
+		Enum:    p.param.Enum,
+	}
+}
+
+func (p *ParamValidator) sliceValidator() valueValidator {
+	return &basicSliceValidator{
+		Path:         p.param.Name,
+		In:           p.param.In,
+		Default:      p.param.Default,
+		MaxItems:     p.param.MaxItems,
+		MinItems:     p.param.MinItems,
+		UniqueItems:  p.param.UniqueItems,
+		Items:        p.param.Items,
+		Source:       p.param,
+		KnownFormats: p.KnownFormats,
+	}
+}
+
+func (p *ParamValidator) numberValidator() valueValidator {
+	return &numberValidator{
+		Path:             p.param.Name,
+		In:               p.param.In,
+		Default:          p.param.Default,
+		MultipleOf:       p.param.MultipleOf,
+		Maximum:          p.param.Maximum,
+		ExclusiveMaximum: p.param.ExclusiveMaximum,
+		Minimum:          p.param.Minimum,
+		ExclusiveMinimum: p.param.ExclusiveMinimum,
+		Type:             p.param.Type,
+		Format:           p.param.Format,
+	}
+}
+
+func (p *ParamValidator) stringValidator() valueValidator {
+	return &stringValidator{
+		Path:            p.param.Name,
+		In:              p.param.In,
+		Default:         p.param.Default,
+		AllowEmptyValue: p.param.AllowEmptyValue,
+		Required:        p.param.Required,
+		MaxLength:       p.param.MaxLength,
+		MinLength:       p.param.MinLength,
+		Pattern:         p.param.Pattern,
+	}
+}
+
+func (p *ParamValidator) formatValidator() valueValidator {
+	return &formatValidator{
+		Path: p.param.Name,
+		In:   p.param.In,
+		//Default:      p.param.Default,
+		Format:       p.param.Format,
+		KnownFormats: p.KnownFormats,
+	}
+}
+
+type basicSliceValidator struct {
+	Path           string
+	In             string
+	Default        interface{}
+	MaxItems       *int64
+	MinItems       *int64
+	UniqueItems    bool
+	Items          *spec.Items
+	Source         interface{}
+	itemsValidator *itemsValidator
+	KnownFormats   strfmt.Registry
+}
+
+func (s *basicSliceValidator) SetPath(path string) {
+	s.Path = path
+}
+
+func (s *basicSliceValidator) Applies(source interface{}, kind reflect.Kind) bool {
+	switch source.(type) {
+	case *spec.Parameter, *spec.Items, *spec.Header:
+		return kind == reflect.Slice
+	}
+	return false
+}
+
+func (s *basicSliceValidator) Validate(data interface{}) *Result {
+	val := reflect.ValueOf(data)
+
+	size := int64(val.Len())
+	if s.MinItems != nil {
+		if err := MinItems(s.Path, s.In, size, *s.MinItems); err != nil {
+			return errorHelp.sErr(err)
+		}
+	}
+
+	if s.MaxItems != nil {
+		if err := MaxItems(s.Path, s.In, size, *s.MaxItems); err != nil {
+			return errorHelp.sErr(err)
+		}
+	}
+
+	if s.UniqueItems {
+		if err := UniqueItems(s.Path, s.In, data); err != nil {
+			return errorHelp.sErr(err)
+		}
+	}
+
+	if s.itemsValidator == nil && s.Items != nil {
+		s.itemsValidator = newItemsValidator(s.Path, s.In, s.Items, s.Source, s.KnownFormats)
+	}
+
+	if s.itemsValidator != nil {
+		for i := 0; i < int(size); i++ {
+			ele := val.Index(i)
+			if err := s.itemsValidator.Validate(i, ele.Interface()); err != nil && err.HasErrors() {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func (s *basicSliceValidator) hasDuplicates(value reflect.Value, size int) bool {
+	dict := make(map[interface{}]struct{})
+	for i := 0; i < size; i++ {
+		ele := value.Index(i)
+		if _, ok := dict[ele.Interface()]; ok {
+			return true
+		}
+		dict[ele.Interface()] = struct{}{}
+	}
+	return false
+}
+
+type numberValidator struct {
+	Path             string
+	In               string
+	Default          interface{}
+	MultipleOf       *float64
+	Maximum          *float64
+	ExclusiveMaximum bool
+	Minimum          *float64
+	ExclusiveMinimum bool
+	// Allows for more accurate behavior regarding integers
+	Type   string
+	Format string
+}
+
+func (n *numberValidator) SetPath(path string) {
+	n.Path = path
+}
+
+func (n *numberValidator) Applies(source interface{}, kind reflect.Kind) bool {
+	switch source.(type) {
+	case *spec.Parameter, *spec.Schema, *spec.Items, *spec.Header:
+		isInt := kind >= reflect.Int && kind <= reflect.Uint64
+		isFloat := kind == reflect.Float32 || kind == reflect.Float64
+		r := isInt || isFloat
+		debugLog("schema props validator for %q applies %t for %T (kind: %v) isInt=%t, isFloat=%t\n", n.Path, r, source, kind, isInt, isFloat)
+		return r
+	}
+	debugLog("schema props validator for %q applies %t for %T (kind: %v)\n", n.Path, false, source, kind)
+	return false
+}
+
+// Validate provides a validator for generic JSON numbers,
+//
+// By default, numbers are internally represented as float64.
+// Formats float, or float32 may alter this behavior by mapping to float32.
+// A special validation process is followed for integers, with optional "format":
+// this is an attempt to provide a validation with native types.
+//
+// NOTE: since the constraint specified (boundary, multipleOf) is unmarshalled
+// as float64, loss of information remains possible (e.g. on very large integers).
+//
+// Since this value directly comes from the unmarshalling, it is not possible
+// at this stage of processing to check further and guarantee the correctness of such values.
+//
+// Normally, the JSON Number.MAX_SAFE_INTEGER (resp. Number.MIN_SAFE_INTEGER)
+// would check we do not get such a loss.
+//
+// If this is the case, replace AddErrors() by AddWarnings() and IsValid() by !HasWarnings().
+//
+// TODO: consider replacing boundary check errors by simple warnings.
+//
+// TODO: default boundaries with MAX_SAFE_INTEGER are not checked (specific to json.Number?)
+func (n *numberValidator) Validate(val interface{}) *Result {
+	res := new(Result)
+
+	resMultiple := new(Result)
+	resMinimum := new(Result)
+	resMaximum := new(Result)
+
+	// Used only to attempt to validate constraint on value,
+	// even though value or constraint specified do not match type and format
+	data := valueHelp.asFloat64(val)
+
+	// Is the provided value within the range of the specified numeric type and format?
+	res.AddErrors(IsValueValidAgainstRange(val, n.Type, n.Format, "Checked", n.Path))
+
+	if n.MultipleOf != nil {
+		// Is the constraint specifier within the range of the specific numeric type and format?
+		resMultiple.AddErrors(IsValueValidAgainstRange(*n.MultipleOf, n.Type, n.Format, "MultipleOf", n.Path))
+		if resMultiple.IsValid() {
+			// Constraint validated with compatible types
+			if err := MultipleOfNativeType(n.Path, n.In, val, *n.MultipleOf); err != nil {
+				resMultiple.Merge(errorHelp.sErr(err))
+			}
+		} else {
+			// Constraint nevertheless validated, converted as general number
+			if err := MultipleOf(n.Path, n.In, data, *n.MultipleOf); err != nil {
+				resMultiple.Merge(errorHelp.sErr(err))
+			}
+		}
+	}
+
+	if n.Maximum != nil {
+		// Is the constraint specifier within the range of the specific numeric type and format?
+		resMaximum.AddErrors(IsValueValidAgainstRange(*n.Maximum, n.Type, n.Format, "Maximum boundary", n.Path))
+		if resMaximum.IsValid() {
+			// Constraint validated with compatible types
+			if err := MaximumNativeType(n.Path, n.In, val, *n.Maximum, n.ExclusiveMaximum); err != nil {
+				resMaximum.Merge(errorHelp.sErr(err))
+			}
+		} else {
+			// Constraint nevertheless validated, converted as general number
+			if err := Maximum(n.Path, n.In, data, *n.Maximum, n.ExclusiveMaximum); err != nil {
+				resMaximum.Merge(errorHelp.sErr(err))
+			}
+		}
+	}
+
+	if n.Minimum != nil {
+		// Is the constraint specifier within the range of the specific numeric type and format?
+		resMinimum.AddErrors(IsValueValidAgainstRange(*n.Minimum, n.Type, n.Format, "Minimum boundary", n.Path))
+		if resMinimum.IsValid() {
+			// Constraint validated with compatible types
+			if err := MinimumNativeType(n.Path, n.In, val, *n.Minimum, n.ExclusiveMinimum); err != nil {
+				resMinimum.Merge(errorHelp.sErr(err))
+			}
+		} else {
+			// Constraint nevertheless validated, converted as general number
+			if err := Minimum(n.Path, n.In, data, *n.Minimum, n.ExclusiveMinimum); err != nil {
+				resMinimum.Merge(errorHelp.sErr(err))
+			}
+		}
+	}
+	res.Merge(resMultiple, resMinimum, resMaximum)
+	res.Inc()
+	return res
+}
+
+type stringValidator struct {
+	Default         interface{}
+	Required        bool
+	AllowEmptyValue bool
+	MaxLength       *int64
+	MinLength       *int64
+	Pattern         string
+	Path            string
+	In              string
+}
+
+func (s *stringValidator) SetPath(path string) {
+	s.Path = path
+}
+
+func (s *stringValidator) Applies(source interface{}, kind reflect.Kind) bool {
+	switch source.(type) {
+	case *spec.Parameter, *spec.Schema, *spec.Items, *spec.Header:
+		r := kind == reflect.String
+		debugLog("string validator for %q applies %t for %T (kind: %v)\n", s.Path, r, source, kind)
+		return r
+	}
+	debugLog("string validator for %q applies %t for %T (kind: %v)\n", s.Path, false, source, kind)
+	return false
+}
+
+func (s *stringValidator) Validate(val interface{}) *Result {
+	data, ok := val.(string)
+	if !ok {
+		return errorHelp.sErr(errors.InvalidType(s.Path, s.In, "string", val))
+	}
+
+	if s.Required && !s.AllowEmptyValue && (s.Default == nil || s.Default == "") {
+		if err := RequiredString(s.Path, s.In, data); err != nil {
+			return errorHelp.sErr(err)
+		}
+	}
+
+	if s.MaxLength != nil {
+		if err := MaxLength(s.Path, s.In, data, *s.MaxLength); err != nil {
+			return errorHelp.sErr(err)
+		}
+	}
+
+	if s.MinLength != nil {
+		if err := MinLength(s.Path, s.In, data, *s.MinLength); err != nil {
+			return errorHelp.sErr(err)
+		}
+	}
+
+	if s.Pattern != "" {
+		if err := Pattern(s.Path, s.In, data, s.Pattern); err != nil {
+			return errorHelp.sErr(err)
+		}
+	}
+	return nil
+}