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json.go
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json.go
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package asset
import (
"encoding/json"
"io"
"regexp"
)
type JsonGenericAssetFormat struct{}
type JsonValueKind int
const (
JsonValueKindUnknown JsonValueKind = iota
JsonValueKindNull
JsonValueKindNumber
JsonValueKindString
JsonValueKindBoolean
JsonValueKindObject
JsonValueKindArray
)
type JsonArray []*JsonValue
type JsonObject map[string]*JsonValue
type JsonValue struct {
Kind JsonValueKind
Value any
Parent *JsonValue
}
var _ Format = &JsonGenericAssetFormat{}
var jsonGenericAssetFormatRegex, _ = regexp.Compile(`\.json$`)
func (format *JsonGenericAssetFormat) Handles(ref Ref) bool {
return jsonGenericAssetFormatRegex.MatchString(ref.URI)
}
func (format *JsonGenericAssetFormat) Types() []Type {
return []Type{TypeJson}
}
func (format *JsonGenericAssetFormat) Load(asset *Asset) error {
decoder := json.NewDecoder(asset.SourceReader)
var setValue func(out *JsonValue) error
setValue = func(out *JsonValue) error {
for {
token, err := decoder.Token()
if err != nil {
return err
}
switch tt := token.(type) {
case json.Number:
out.Kind = JsonValueKindNumber
out.Value, err = tt.Float64()
return err
case string:
out.Kind = JsonValueKindString
out.Value = tt
return nil
case float64:
out.Kind = JsonValueKindNumber
out.Value = tt
return nil
case nil:
out.Kind = JsonValueKindNull
out.Value = nil
return nil
case bool:
out.Kind = JsonValueKindBoolean
out.Value = tt
return nil
case json.Delim:
switch tt {
case '[':
out.Kind = JsonValueKindArray
jsonArray := JsonArray{}
for {
value := JsonValue{}
err := setValue(&value)
if err != nil {
return err
}
if value.Kind == JsonValueKindUnknown {
out.Value = jsonArray
return nil
}
jsonArray = append(jsonArray, &value)
}
case '{':
out.Kind = JsonValueKindObject
jsonObject := JsonObject{}
for {
property, err := decoder.Token()
if err != nil {
return err
}
if delim, isEnd := property.(json.Delim); isEnd && delim == '}' {
out.Value = jsonObject
return nil
}
value := JsonValue{}
err = setValue(&value)
if err != nil {
return err
}
jsonObject[property.(string)] = &value
}
default:
return nil
}
default:
return nil
}
}
}
asset.LoadStatus.Start()
root := JsonValue{}
err := setValue(&root)
if err == io.EOF {
err = nil
}
if err != nil {
asset.LoadStatus.Fail(err)
} else {
asset.LoadStatus.Success()
asset.Data = root
}
return err
}
func (format *JsonGenericAssetFormat) Unload(asset *Asset) error {
asset.LoadStatus.Reset()
return nil
}
func (format *JsonGenericAssetFormat) Activate(asset *Asset) error {
asset.ActivateStatus.Success()
return nil
}
func (format *JsonGenericAssetFormat) Deactivate(asset *Asset) error {
asset.ActivateStatus.Reset()
return nil
}