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99 lines
2.4 KiB
Go
99 lines
2.4 KiB
Go
package mapping
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import (
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"encoding/json"
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"errors"
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"io"
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"io/ioutil"
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"gopkg.in/yaml.v2"
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)
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// To make .json & .yaml consistent, we just use json as the tag key.
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const yamlTagKey = "json"
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var (
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// ErrUnsupportedType is an error that indicates the config format is not supported.
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ErrUnsupportedType = errors.New("only map-like configs are suported")
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yamlUnmarshaler = NewUnmarshaler(yamlTagKey)
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)
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// UnmarshalYamlBytes unmarshals content into v.
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func UnmarshalYamlBytes(content []byte, v interface{}) error {
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return unmarshalYamlBytes(content, v, yamlUnmarshaler)
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}
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// UnmarshalYamlReader unmarshals content from reader into v.
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func UnmarshalYamlReader(reader io.Reader, v interface{}) error {
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return unmarshalYamlReader(reader, v, yamlUnmarshaler)
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}
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func unmarshalYamlBytes(content []byte, v interface{}, unmarshaler *Unmarshaler) error {
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var o interface{}
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if err := yamlUnmarshal(content, &o); err != nil {
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return err
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}
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if m, ok := o.(map[string]interface{}); ok {
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return unmarshaler.Unmarshal(m, v)
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}
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return ErrUnsupportedType
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}
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func unmarshalYamlReader(reader io.Reader, v interface{}, unmarshaler *Unmarshaler) error {
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content, err := ioutil.ReadAll(reader)
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if err != nil {
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return err
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}
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return unmarshalYamlBytes(content, v, unmarshaler)
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}
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// yamlUnmarshal YAML to map[string]interface{} instead of map[interface{}]interface{}.
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func yamlUnmarshal(in []byte, out interface{}) error {
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var res interface{}
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if err := yaml.Unmarshal(in, &res); err != nil {
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return err
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}
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*out.(*interface{}) = cleanupMapValue(res)
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return nil
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}
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func cleanupInterfaceMap(in map[interface{}]interface{}) map[string]interface{} {
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res := make(map[string]interface{})
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for k, v := range in {
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res[Repr(k)] = cleanupMapValue(v)
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}
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return res
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}
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func cleanupInterfaceNumber(in interface{}) json.Number {
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return json.Number(Repr(in))
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}
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func cleanupInterfaceSlice(in []interface{}) []interface{} {
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res := make([]interface{}, len(in))
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for i, v := range in {
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res[i] = cleanupMapValue(v)
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}
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return res
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}
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func cleanupMapValue(v interface{}) interface{} {
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switch v := v.(type) {
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case []interface{}:
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return cleanupInterfaceSlice(v)
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case map[interface{}]interface{}:
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return cleanupInterfaceMap(v)
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case bool, string:
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return v
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case int, uint, int8, uint8, int16, uint16, int32, uint32, int64, uint64, float32, float64:
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return cleanupInterfaceNumber(v)
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default:
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return Repr(v)
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}
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}
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