qv/cmd/web/helpers.go

package main

import (
	api "code.dlmw.ch/dlmw/qv/internal"
	"code.dlmw.ch/dlmw/qv/internal/validator"
	"encoding/json"
	"errors"
	"github.com/go-playground/form/v4"
	"net/http"
)

func (app *application) serverError(w http.ResponseWriter, r *http.Request, err error) {
	w.WriteHeader(http.StatusInternalServerError)
	var response = api.ErrorResponse{
		Code:    http.StatusInternalServerError,
		Details: nil,
		Message: "There was an error in the request",
	}
	json.NewEncoder(w).Encode(response)
}

func (app *application) clientError(w http.ResponseWriter, status int, message string) {
	w.WriteHeader(status)
	var response = api.ErrorResponse{
		Code: http.StatusUnprocessableEntity,
		Details: &map[string]interface{}{
			"error": message,
		},
		Message: "There was an error in the request",
	}
	json.NewEncoder(w).Encode(response)
}

func (app *application) unprocessableEntityError(w http.ResponseWriter, v validator.Validator) {
	w.WriteHeader(http.StatusUnprocessableEntity)
	var response = api.ErrorResponse{
		Code: http.StatusUnprocessableEntity,
		Details: &map[string]interface{}{
			"fields": v.FieldErrors,
		},
		Message: "Election data is invalid",
	}
	json.NewEncoder(w).Encode(response)
}

func (app *application) decodePostForm(r *http.Request, dst any) error {
	err := r.ParseForm()
	if err != nil {
		return err
	}

	err = app.formDecoder.Decode(dst, r.PostForm)
	if err != nil {
		var invalidDecoderError *form.InvalidDecoderError
		if errors.As(err, &invalidDecoderError) {
			panic(err)
		}

		return err
	}

	return nil
}