package json import ( "errors" "time" "github.com/imdario/mergo" "github.com/micro/go-micro/v2/config/encoder" "github.com/micro/go-micro/v2/config/encoder/json" "github.com/micro/go-micro/v2/config/reader" "github.com/micro/go-micro/v2/config/source" ) type jsonReader struct { opts reader.Options json encoder.Encoder } func (j *jsonReader) Merge(changes ...*source.ChangeSet) (*source.ChangeSet, error) { var merged map[string]interface{} for _, m := range changes { if m == nil { continue } if len(m.Data) == 0 { continue } codec, ok := j.opts.Encoding[m.Format] if !ok { // fallback codec = j.json } var data map[string]interface{} if err := codec.Decode(m.Data, &data); err != nil { return nil, err } if err := mergo.Map(&merged, data, mergo.WithOverride); err != nil { return nil, err } } b, err := j.json.Encode(merged) if err != nil { return nil, err } cs := &source.ChangeSet{ Timestamp: time.Now(), Data: b, Source: "json", Format: j.json.String(), } cs.Checksum = cs.Sum() return cs, nil } func (j *jsonReader) Values(ch *source.ChangeSet) (reader.Values, error) { if ch == nil { return nil, errors.New("changeset is nil") } if ch.Format != "json" { return nil, errors.New("unsupported format") } return newValues(ch, j.opts) } func (j *jsonReader) String() string { return "json" } // NewReader creates a json reader func NewReader(opts ...reader.Option) reader.Reader { options := reader.NewOptions(opts...) return &jsonReader{ json: json.NewEncoder(), opts: options, } }