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package dto
import (
"encoding/json"
"fmt"
"log/slog"
"net/http"
"github.com/go-playground/validator/v10"
)
var validate = validator.New(validator.WithRequiredStructEnabled())
func ReadDto(r *http.Request, o interface{}) Response {
decoder := json.NewDecoder(r.Body)
if err := decoder.Decode(o); err != nil {
return &ErrorResponse{
Code: http.StatusBadRequest,
Message: fmt.Errorf("Invalid request (%w)", err).Error(),
}
}
if err := validate.Struct(o); err != nil {
return &ErrorResponse{
Code: http.StatusBadRequest,
Message: err.Error(),
}
}
return nil
}
func WrapResponseFunc(dtoFunc func(http.ResponseWriter, *http.Request) error) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
WriteDto(w, r, dtoFunc(w, r))
}
}
func WriteDto(w http.ResponseWriter, r *http.Request, err error) {
if o, ok := err.(Response); ok {
data, err := json.Marshal(o)
if err != nil {
w.WriteHeader(500)
slog.Error("could not serialise JSON", "error", err)
return
}
w.Header().Add("Content-Type", "application/json")
w.WriteHeader(o.Status())
w.Write(data)
} else {
w.WriteHeader(500)
slog.Error("internal server error handling request", "error", err)
}
}
|
