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package api
import (
"fmt"
"log"
"net/http"
"github.com/ponzu-cms/ponzu/system/item"
"github.com/tidwall/gjson"
"github.com/tidwall/sjson"
)
func omit(res http.ResponseWriter, req *http.Request, it interface{}, data []byte) ([]byte, error) {
// is it Omittable
om, ok := it.(item.Omittable)
if !ok {
return data, nil
}
return omitFields(res, req, om, data, "data")
}
func omitFields(res http.ResponseWriter, req *http.Request, om item.Omittable, data []byte, pathPrefix string) ([]byte, error) {
// get fields to omit from json data
fields, err := om.Omit(res, req)
if err != nil {
return nil, err
}
// remove each field from json, all responses contain json object(s) in top-level "data" array
n := int(gjson.GetBytes(data, pathPrefix+".#").Int())
for i := 0; i < n; i++ {
for k := range fields {
var err error
data, err = sjson.DeleteBytes(data, fmt.Sprintf("%s.%d.%s", pathPrefix, i, fields[k]))
if err != nil {
log.Println("Erorr omitting field:", fields[k], "from item.Omittable:", om)
return nil, err
}
}
}
return data, nil
}
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