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// Copyright 2015 xeipuuv ( https://github.com/xeipuuv )
//
// 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 xeipuuv
// author-github https://github.com/xeipuuv
// author-mail xeipuuv@gmail.com
//
// repository-name gojsonschema
// repository-desc An implementation of JSON Schema, based on IETF's draft v4 - Go language.
//
// description Various utility functions.
//
// created 26-02-2013
package gojsonschema
import (
"encoding/json"
"fmt"
"math"
"reflect"
"strconv"
)
func isKind(what interface{}, kind reflect.Kind) bool {
target := what
if isJsonNumber(what) {
// JSON Numbers are strings!
target = *mustBeNumber(what)
}
return reflect.ValueOf(target).Kind() == kind
}
func existsMapKey(m map[string]interface{}, k string) bool {
_, ok := m[k]
return ok
}
func isStringInSlice(s []string, what string) bool {
for i := range s {
if s[i] == what {
return true
}
}
return false
}
func marshalToJsonString(value interface{}) (*string, error) {
mBytes, err := json.Marshal(value)
if err != nil {
return nil, err
}
sBytes := string(mBytes)
return &sBytes, nil
}
func isJsonNumber(what interface{}) bool {
switch what.(type) {
case json.Number:
return true
}
return false
}
func checkJsonNumber(what interface{}) (isValidFloat64 bool, isValidInt64 bool, isValidInt32 bool) {
jsonNumber := what.(json.Number)
f64, errFloat64 := jsonNumber.Float64()
s64 := strconv.FormatFloat(f64, 'f', -1, 64)
_, errInt64 := strconv.ParseInt(s64, 10, 64)
isValidFloat64 = errFloat64 == nil
isValidInt64 = errInt64 == nil
_, errInt32 := strconv.ParseInt(s64, 10, 32)
isValidInt32 = isValidInt64 && errInt32 == nil
return
}
// same as ECMA Number.MAX_SAFE_INTEGER and Number.MIN_SAFE_INTEGER
const (
max_json_float = float64(1<<53 - 1) // 9007199254740991.0 2^53 - 1
min_json_float = -float64(1<<53 - 1) //-9007199254740991.0 -2^53 - 1
)
func isFloat64AnInteger(f float64) bool {
if math.IsNaN(f) || math.IsInf(f, 0) || f < min_json_float || f > max_json_float {
return false
}
return f == float64(int64(f)) || f == float64(uint64(f))
}
func mustBeInteger(what interface{}) *int {
if isJsonNumber(what) {
number := what.(json.Number)
_, _, isValidInt32 := checkJsonNumber(number)
if isValidInt32 {
int64Value, err := number.Int64()
if err != nil {
return nil
}
int32Value := int(int64Value)
return &int32Value
} else {
return nil
}
}
return nil
}
func mustBeNumber(what interface{}) *float64 {
if isJsonNumber(what) {
number := what.(json.Number)
float64Value, err := number.Float64()
if err == nil {
return &float64Value
} else {
return nil
}
}
return nil
}
// formats a number so that it is displayed as the smallest string possible
func resultErrorFormatJsonNumber(n json.Number) string {
if int64Value, err := n.Int64(); err == nil {
return fmt.Sprintf("%d", int64Value)
}
float64Value, _ := n.Float64()
return fmt.Sprintf("%g", float64Value)
}
// formats a number so that it is displayed as the smallest string possible
func resultErrorFormatNumber(n float64) string {
if isFloat64AnInteger(n) {
return fmt.Sprintf("%d", int64(n))
}
return fmt.Sprintf("%g", n)
}
func convertDocumentNode(val interface{}) interface{} {
if lval, ok := val.([]interface{}); ok {
res := []interface{}{}
for _, v := range lval {
res = append(res, convertDocumentNode(v))
}
return res
}
if mval, ok := val.(map[interface{}]interface{}); ok {
res := map[string]interface{}{}
for k, v := range mval {
res[k.(string)] = convertDocumentNode(v)
}
return res
}
return val
}
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