func (j *jsonReader) Parse(changes ...*ChangeSet) (*ChangeSet, error) {
var merged map[string]interface{}
for _, m := range changes {
if len(m.Data) == 0 {
m.Data = []byte(`{}`)
}
var data map[string]interface{}
if err := json.Unmarshal(m.Data, &data); err != nil {
return nil, err
}
if err := mergo.MapWithOverwrite(&merged, data); err != nil {
return nil, err
}
}
b, err := json.Marshal(merged)
if err != nil {
return nil, err
}
h, err := hash.Hash(merged, nil)
if err != nil {
return nil, err
}
return &ChangeSet{
Timestamp: time.Now(),
Data: b,
Checksum: fmt.Sprintf("%x", h),
Source: "json",
}, nil
}
// MergeMap TODO: Slow function: It wants to change fast function
func MergeMap(src, dst map[string]interface{}) map[string]interface{} {
mergo.MapWithOverwrite(&dst, src)
return dst
}