1 files changed, 531 insertions, 0 deletions
diff --git a/vendor/github.com/go-openapi/jsonpointer/pointer.go b/vendor/github.com/go-openapi/jsonpointer/pointer.go
new file mode 100644
index 000000000..d970c7cf4
--- /dev/null
+++ b/vendor/github.com/go-openapi/jsonpointer/pointer.go
@@ -0,0 +1,531 @@
+// Copyright 2013 sigu-399 ( https://github.com/sigu-399 )
+//
+// 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.
+
+// author       sigu-399
+// author-github  https://github.com/sigu-399
+// author-mail    sigu.399@gmail.com
+//
+// repository-name  jsonpointer
+// repository-desc  An implementation of JSON Pointer - Go language
+//
+// description    Main and unique file.
+//
+// created        25-02-2013
+
+package jsonpointer
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"reflect"
+	"strconv"
+	"strings"
+
+	"github.com/go-openapi/swag"
+)
+
+const (
+	emptyPointer     = ``
+	pointerSeparator = `/`
+
+	invalidStart = `JSON pointer must be empty or start with a "` + pointerSeparator
+	notFound     = `Can't find the pointer in the document`
+)
+
+var jsonPointableType = reflect.TypeOf(new(JSONPointable)).Elem()
+var jsonSetableType = reflect.TypeOf(new(JSONSetable)).Elem()
+
+// JSONPointable is an interface for structs to implement when they need to customize the
+// json pointer process
+type JSONPointable interface {
+	JSONLookup(string) (any, error)
+}
+
+// JSONSetable is an interface for structs to implement when they need to customize the
+// json pointer process
+type JSONSetable interface {
+	JSONSet(string, any) error
+}
+
+// New creates a new json pointer for the given string
+func New(jsonPointerString string) (Pointer, error) {
+
+	var p Pointer
+	err := p.parse(jsonPointerString)
+	return p, err
+
+}
+
+// Pointer the json pointer reprsentation
+type Pointer struct {
+	referenceTokens []string
+}
+
+// "Constructor", parses the given string JSON pointer
+func (p *Pointer) parse(jsonPointerString string) error {
+
+	var err error
+
+	if jsonPointerString != emptyPointer {
+		if !strings.HasPrefix(jsonPointerString, pointerSeparator) {
+			err = errors.New(invalidStart)
+		} else {
+			referenceTokens := strings.Split(jsonPointerString, pointerSeparator)
+			p.referenceTokens = append(p.referenceTokens, referenceTokens[1:]...)
+		}
+	}
+
+	return err
+}
+
+// Get uses the pointer to retrieve a value from a JSON document
+func (p *Pointer) Get(document any) (any, reflect.Kind, error) {
+	return p.get(document, swag.DefaultJSONNameProvider)
+}
+
+// Set uses the pointer to set a value from a JSON document
+func (p *Pointer) Set(document any, value any) (any, error) {
+	return document, p.set(document, value, swag.DefaultJSONNameProvider)
+}
+
+// GetForToken gets a value for a json pointer token 1 level deep
+func GetForToken(document any, decodedToken string) (any, reflect.Kind, error) {
+	return getSingleImpl(document, decodedToken, swag.DefaultJSONNameProvider)
+}
+
+// SetForToken gets a value for a json pointer token 1 level deep
+func SetForToken(document any, decodedToken string, value any) (any, error) {
+	return document, setSingleImpl(document, value, decodedToken, swag.DefaultJSONNameProvider)
+}
+
+func isNil(input any) bool {
+	if input == nil {
+		return true
+	}
+
+	kind := reflect.TypeOf(input).Kind()
+	switch kind { //nolint:exhaustive
+	case reflect.Ptr, reflect.Map, reflect.Slice, reflect.Chan:
+		return reflect.ValueOf(input).IsNil()
+	default:
+		return false
+	}
+}
+
+func getSingleImpl(node any, decodedToken string, nameProvider *swag.NameProvider) (any, reflect.Kind, error) {
+	rValue := reflect.Indirect(reflect.ValueOf(node))
+	kind := rValue.Kind()
+	if isNil(node) {
+		return nil, kind, fmt.Errorf("nil value has not field %q", decodedToken)
+	}
+
+	switch typed := node.(type) {
+	case JSONPointable:
+		r, err := typed.JSONLookup(decodedToken)
+		if err != nil {
+			return nil, kind, err
+		}
+		return r, kind, nil
+	case *any: // case of a pointer to interface, that is not resolved by reflect.Indirect
+		return getSingleImpl(*typed, decodedToken, nameProvider)
+	}
+
+	switch kind { //nolint:exhaustive
+	case reflect.Struct:
+		nm, ok := nameProvider.GetGoNameForType(rValue.Type(), decodedToken)
+		if !ok {
+			return nil, kind, fmt.Errorf("object has no field %q", decodedToken)
+		}
+		fld := rValue.FieldByName(nm)
+		return fld.Interface(), kind, nil
+
+	case reflect.Map:
+		kv := reflect.ValueOf(decodedToken)
+		mv := rValue.MapIndex(kv)
+
+		if mv.IsValid() {
+			return mv.Interface(), kind, nil
+		}
+		return nil, kind, fmt.Errorf("object has no key %q", decodedToken)
+
+	case reflect.Slice:
+		tokenIndex, err := strconv.Atoi(decodedToken)
+		if err != nil {
+			return nil, kind, err
+		}
+		sLength := rValue.Len()
+		if tokenIndex < 0 || tokenIndex >= sLength {
+			return nil, kind, fmt.Errorf("index out of bounds array[0,%d] index '%d'", sLength-1, tokenIndex)
+		}
+
+		elem := rValue.Index(tokenIndex)
+		return elem.Interface(), kind, nil
+
+	default:
+		return nil, kind, fmt.Errorf("invalid token reference %q", decodedToken)
+	}
+
+}
+
+func setSingleImpl(node, data any, decodedToken string, nameProvider *swag.NameProvider) error {
+	rValue := reflect.Indirect(reflect.ValueOf(node))
+
+	if ns, ok := node.(JSONSetable); ok { // pointer impl
+		return ns.JSONSet(decodedToken, data)
+	}
+
+	if rValue.Type().Implements(jsonSetableType) {
+		return node.(JSONSetable).JSONSet(decodedToken, data)
+	}
+
+	switch rValue.Kind() { //nolint:exhaustive
+	case reflect.Struct:
+		nm, ok := nameProvider.GetGoNameForType(rValue.Type(), decodedToken)
+		if !ok {
+			return fmt.Errorf("object has no field %q", decodedToken)
+		}
+		fld := rValue.FieldByName(nm)
+		if fld.IsValid() {
+			fld.Set(reflect.ValueOf(data))
+		}
+		return nil
+
+	case reflect.Map:
+		kv := reflect.ValueOf(decodedToken)
+		rValue.SetMapIndex(kv, reflect.ValueOf(data))
+		return nil
+
+	case reflect.Slice:
+		tokenIndex, err := strconv.Atoi(decodedToken)
+		if err != nil {
+			return err
+		}
+		sLength := rValue.Len()
+		if tokenIndex < 0 || tokenIndex >= sLength {
+			return fmt.Errorf("index out of bounds array[0,%d] index '%d'", sLength, tokenIndex)
+		}
+
+		elem := rValue.Index(tokenIndex)
+		if !elem.CanSet() {
+			return fmt.Errorf("can't set slice index %s to %v", decodedToken, data)
+		}
+		elem.Set(reflect.ValueOf(data))
+		return nil
+
+	default:
+		return fmt.Errorf("invalid token reference %q", decodedToken)
+	}
+
+}
+
+func (p *Pointer) get(node any, nameProvider *swag.NameProvider) (any, reflect.Kind, error) {
+
+	if nameProvider == nil {
+		nameProvider = swag.DefaultJSONNameProvider
+	}
+
+	kind := reflect.Invalid
+
+	// Full document when empty
+	if len(p.referenceTokens) == 0 {
+		return node, kind, nil
+	}
+
+	for _, token := range p.referenceTokens {
+
+		decodedToken := Unescape(token)
+
+		r, knd, err := getSingleImpl(node, decodedToken, nameProvider)
+		if err != nil {
+			return nil, knd, err
+		}
+		node = r
+	}
+
+	rValue := reflect.ValueOf(node)
+	kind = rValue.Kind()
+
+	return node, kind, nil
+}
+
+func (p *Pointer) set(node, data any, nameProvider *swag.NameProvider) error {
+	knd := reflect.ValueOf(node).Kind()
+
+	if knd != reflect.Ptr && knd != reflect.Struct && knd != reflect.Map && knd != reflect.Slice && knd != reflect.Array {
+		return errors.New("only structs, pointers, maps and slices are supported for setting values")
+	}
+
+	if nameProvider == nil {
+		nameProvider = swag.DefaultJSONNameProvider
+	}
+
+	// Full document when empty
+	if len(p.referenceTokens) == 0 {
+		return nil
+	}
+
+	lastI := len(p.referenceTokens) - 1
+	for i, token := range p.referenceTokens {
+		isLastToken := i == lastI
+		decodedToken := Unescape(token)
+
+		if isLastToken {
+
+			return setSingleImpl(node, data, decodedToken, nameProvider)
+		}
+
+		rValue := reflect.Indirect(reflect.ValueOf(node))
+		kind := rValue.Kind()
+
+		if rValue.Type().Implements(jsonPointableType) {
+			r, err := node.(JSONPointable).JSONLookup(decodedToken)
+			if err != nil {
+				return err
+			}
+			fld := reflect.ValueOf(r)
+			if fld.CanAddr() && fld.Kind() != reflect.Interface && fld.Kind() != reflect.Map && fld.Kind() != reflect.Slice && fld.Kind() != reflect.Ptr {
+				node = fld.Addr().Interface()
+				continue
+			}
+			node = r
+			continue
+		}
+
+		switch kind { //nolint:exhaustive
+		case reflect.Struct:
+			nm, ok := nameProvider.GetGoNameForType(rValue.Type(), decodedToken)
+			if !ok {
+				return fmt.Errorf("object has no field %q", decodedToken)
+			}
+			fld := rValue.FieldByName(nm)
+			if fld.CanAddr() && fld.Kind() != reflect.Interface && fld.Kind() != reflect.Map && fld.Kind() != reflect.Slice && fld.Kind() != reflect.Ptr {
+				node = fld.Addr().Interface()
+				continue
+			}
+			node = fld.Interface()
+
+		case reflect.Map:
+			kv := reflect.ValueOf(decodedToken)
+			mv := rValue.MapIndex(kv)
+
+			if !mv.IsValid() {
+				return fmt.Errorf("object has no key %q", decodedToken)
+			}
+			if mv.CanAddr() && mv.Kind() != reflect.Interface && mv.Kind() != reflect.Map && mv.Kind() != reflect.Slice && mv.Kind() != reflect.Ptr {
+				node = mv.Addr().Interface()
+				continue
+			}
+			node = mv.Interface()
+
+		case reflect.Slice:
+			tokenIndex, err := strconv.Atoi(decodedToken)
+			if err != nil {
+				return err
+			}
+			sLength := rValue.Len()
+			if tokenIndex < 0 || tokenIndex >= sLength {
+				return fmt.Errorf("index out of bounds array[0,%d] index '%d'", sLength, tokenIndex)
+			}
+
+			elem := rValue.Index(tokenIndex)
+			if elem.CanAddr() && elem.Kind() != reflect.Interface && elem.Kind() != reflect.Map && elem.Kind() != reflect.Slice && elem.Kind() != reflect.Ptr {
+				node = elem.Addr().Interface()
+				continue
+			}
+			node = elem.Interface()
+
+		default:
+			return fmt.Errorf("invalid token reference %q", decodedToken)
+		}
+
+	}
+
+	return nil
+}
+
+// DecodedTokens returns the decoded tokens
+func (p *Pointer) DecodedTokens() []string {
+	result := make([]string, 0, len(p.referenceTokens))
+	for _, t := range p.referenceTokens {
+		result = append(result, Unescape(t))
+	}
+	return result
+}
+
+// IsEmpty returns true if this is an empty json pointer
+// this indicates that it points to the root document
+func (p *Pointer) IsEmpty() bool {
+	return len(p.referenceTokens) == 0
+}
+
+// Pointer to string representation function
+func (p *Pointer) String() string {
+
+	if len(p.referenceTokens) == 0 {
+		return emptyPointer
+	}
+
+	pointerString := pointerSeparator + strings.Join(p.referenceTokens, pointerSeparator)
+
+	return pointerString
+}
+
+func (p *Pointer) Offset(document string) (int64, error) {
+	dec := json.NewDecoder(strings.NewReader(document))
+	var offset int64
+	for _, ttk := range p.DecodedTokens() {
+		tk, err := dec.Token()
+		if err != nil {
+			return 0, err
+		}
+		switch tk := tk.(type) {
+		case json.Delim:
+			switch tk {
+			case '{':
+				offset, err = offsetSingleObject(dec, ttk)
+				if err != nil {
+					return 0, err
+				}
+			case '[':
+				offset, err = offsetSingleArray(dec, ttk)
+				if err != nil {
+					return 0, err
+				}
+			default:
+				return 0, fmt.Errorf("invalid token %#v", tk)
+			}
+		default:
+			return 0, fmt.Errorf("invalid token %#v", tk)
+		}
+	}
+	return offset, nil
+}
+
+func offsetSingleObject(dec *json.Decoder, decodedToken string) (int64, error) {
+	for dec.More() {
+		offset := dec.InputOffset()
+		tk, err := dec.Token()
+		if err != nil {
+			return 0, err
+		}
+		switch tk := tk.(type) {
+		case json.Delim:
+			switch tk {
+			case '{':
+				if err = drainSingle(dec); err != nil {
+					return 0, err
+				}
+			case '[':
+				if err = drainSingle(dec); err != nil {
+					return 0, err
+				}
+			}
+		case string:
+			if tk == decodedToken {
+				return offset, nil
+			}
+		default:
+			return 0, fmt.Errorf("invalid token %#v", tk)
+		}
+	}
+	return 0, fmt.Errorf("token reference %q not found", decodedToken)
+}
+
+func offsetSingleArray(dec *json.Decoder, decodedToken string) (int64, error) {
+	idx, err := strconv.Atoi(decodedToken)
+	if err != nil {
+		return 0, fmt.Errorf("token reference %q is not a number: %v", decodedToken, err)
+	}
+	var i int
+	for i = 0; i < idx && dec.More(); i++ {
+		tk, err := dec.Token()
+		if err != nil {
+			return 0, err
+		}
+
+		if delim, isDelim := tk.(json.Delim); isDelim {
+			switch delim {
+			case '{':
+				if err = drainSingle(dec); err != nil {
+					return 0, err
+				}
+			case '[':
+				if err = drainSingle(dec); err != nil {
+					return 0, err
+				}
+			}
+		}
+	}
+
+	if !dec.More() {
+		return 0, fmt.Errorf("token reference %q not found", decodedToken)
+	}
+	return dec.InputOffset(), nil
+}
+
+// drainSingle drains a single level of object or array.
+// The decoder has to guarantee the beginning delim (i.e. '{' or '[') has been consumed.
+func drainSingle(dec *json.Decoder) error {
+	for dec.More() {
+		tk, err := dec.Token()
+		if err != nil {
+			return err
+		}
+		if delim, isDelim := tk.(json.Delim); isDelim {
+			switch delim {
+			case '{':
+				if err = drainSingle(dec); err != nil {
+					return err
+				}
+			case '[':
+				if err = drainSingle(dec); err != nil {
+					return err
+				}
+			}
+		}
+	}
+
+	// Consumes the ending delim
+	if _, err := dec.Token(); err != nil {
+		return err
+	}
+	return nil
+}
+
+// Specific JSON pointer encoding here
+// ~0 => ~
+// ~1 => /
+// ... and vice versa
+
+const (
+	encRefTok0 = `~0`
+	encRefTok1 = `~1`
+	decRefTok0 = `~`
+	decRefTok1 = `/`
+)
+
+// Unescape unescapes a json pointer reference token string to the original representation
+func Unescape(token string) string {
+	step1 := strings.ReplaceAll(token, encRefTok1, decRefTok1)
+	step2 := strings.ReplaceAll(step1, encRefTok0, decRefTok0)
+	return step2
+}
+
+// Escape escapes a pointer reference token string
+func Escape(token string) string {
+	step1 := strings.ReplaceAll(token, decRefTok0, encRefTok0)
+	step2 := strings.ReplaceAll(step1, decRefTok1, encRefTok1)
+	return step2
+}