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json.go
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json.go
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package limacharlie
import (
"encoding/json"
"strconv"
"strings"
)
type Dict map[string]interface{}
type List []interface{}
func (d *Dict) UnmarshalJSON(data []byte) error {
c, err := UnmarshalCleanJSON(string(data))
if err != nil {
return err
}
*d = c
return nil
}
func (l *List) UnmarshalJSON(data []byte) error {
c, err := UnmarshalCleanJSONList(string(data))
if err != nil {
return err
}
*l = c
return nil
}
func UnmarshalCleanJSON(data string) (map[string]interface{}, error) {
d := json.NewDecoder(strings.NewReader(data))
d.UseNumber()
out := map[string]interface{}{}
if err := d.Decode(&out); err != nil {
return nil, err
}
if err := unmarshalCleanJSONMap(out); err != nil {
return nil, err
}
return out, nil
}
func UnmarshalCleanJSONList(data string) ([]interface{}, error) {
d := json.NewDecoder(strings.NewReader(data))
d.UseNumber()
out := []interface{}{}
if err := d.Decode(&out); err != nil {
return nil, err
}
if err := unmarshalCleanJSONList(out); err != nil {
return nil, err
}
return out, nil
}
func unmarshalCleanJSONMap(out map[string]interface{}) error {
for k, v := range out {
switch val := v.(type) {
case map[string]interface{}:
if err := unmarshalCleanJSONMap(val); err != nil {
return err
}
case []interface{}:
if err := unmarshalCleanJSONList(val); err != nil {
return err
}
default:
var err error
out[k], err = unmarshalCleanJSONElement(val)
if err != nil {
return err
}
}
}
return nil
}
func unmarshalCleanJSONList(out []interface{}) error {
for i, v := range out {
switch val := v.(type) {
case map[string]interface{}:
if err := unmarshalCleanJSONMap(val); err != nil {
return err
}
case []interface{}:
if err := unmarshalCleanJSONList(val); err != nil {
return err
}
default:
var err error
out[i], err = unmarshalCleanJSONElement(val)
if err != nil {
return err
}
}
}
return nil
}
func unmarshalCleanJSONElement(out interface{}) (interface{}, error) {
if val, ok := out.(json.Number); ok {
// This is a Number, we need to check if it has
// a float component originally to see if we should
// type it as an int64 or a float64.
original := val.String()
if !strings.Contains(original, ".") {
// No dot component, return as uint64 so
// that it gets serialized back to a notation
// without a dot in it.
if !strings.HasPrefix(original, "-") {
// We cannot use val.Int64() because it does not
// support Unsigned 64 bit ints.
i, err := strconv.ParseUint(original, 10, 64)
if err != nil {
return nil, err
}
out = i
} else {
// Looks like a signed value.
i, err := val.Int64()
if err != nil {
return nil, err
}
out = i
}
} else {
// There is a dot, assume a float.
i, err := val.Float64()
if err != nil {
return nil, err
}
out = i
}
}
return out, nil
}
func (d Dict) UnMarshalToStruct(out interface{}) error {
tmp, err := json.Marshal(d)
if err != nil {
return err
}
if err := json.Unmarshal(tmp, out); err != nil {
return err
}
return nil
}
func (d *Dict) ImportFromStruct(in interface{}) (Dict, error) {
tmp, err := json.Marshal(in)
if err != nil {
return nil, err
}
if err := json.Unmarshal(tmp, d); err != nil {
return nil, err
}
return *d, nil
}