84 lines
1.5 KiB
Go
84 lines
1.5 KiB
Go
package json
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import (
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"errors"
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"time"
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"github.com/imdario/mergo"
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"github.com/micro/go-micro/config/encoder"
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"github.com/micro/go-micro/config/encoder/json"
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"github.com/micro/go-micro/config/reader"
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"github.com/micro/go-micro/config/source"
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)
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type jsonReader struct {
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opts reader.Options
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json encoder.Encoder
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}
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func (j *jsonReader) Merge(changes ...*source.ChangeSet) (*source.ChangeSet, error) {
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var merged map[string]interface{}
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for _, m := range changes {
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if m == nil {
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continue
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}
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if len(m.Data) == 0 {
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continue
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}
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codec, ok := j.opts.Encoding[m.Format]
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if !ok {
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// fallback
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codec = j.json
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}
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var data map[string]interface{}
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if err := codec.Decode(m.Data, &data); err != nil {
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return nil, err
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}
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if err := mergo.Map(&merged, data, mergo.WithOverride); err != nil {
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return nil, err
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}
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}
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b, err := j.json.Encode(merged)
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if err != nil {
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return nil, err
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}
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cs := &source.ChangeSet{
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Timestamp: time.Now(),
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Data: b,
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Source: "json",
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Format: j.json.String(),
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}
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cs.Checksum = cs.Sum()
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return cs, nil
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}
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func (j *jsonReader) Values(ch *source.ChangeSet) (reader.Values, error) {
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if ch == nil {
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return nil, errors.New("changeset is nil")
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}
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if ch.Format != "json" {
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return nil, errors.New("unsupported format")
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}
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return newValues(ch)
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}
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func (j *jsonReader) String() string {
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return "json"
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}
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// NewReader creates a json reader
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func NewReader(opts ...reader.Option) reader.Reader {
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options := reader.NewOptions(opts...)
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return &jsonReader{
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json: json.NewEncoder(),
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opts: options,
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}
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}
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