photoplaces/backend/internal/handlers/errors.go

package handlers

import (
	"encoding/json"
	"log/slog"
	"net/http"
	"sync/atomic"
)

const maxRequestBodySize = 1 << 20 // 1 MB

var isProd atomic.Bool

func InitAppEnv(env string) {
	isProd.Store(env == "production")
}

func ResetAppEnv() {
	isProd.Store(false)
}

func writeJSON(w http.ResponseWriter, status int, v interface{}) {
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(status)
	json.NewEncoder(w).Encode(v)
}

func writeError(w http.ResponseWriter, status int, msg string, err error) {
	if err != nil {
		slog.Error("handler error", "status", status, "error", err)
	}

	if status == http.StatusInternalServerError && isProd.Load() {
		msg = "internal server error"
	}

	writeJSON(w, status, map[string]string{"error": msg})
}

func writeValidationError(w http.ResponseWriter, err error) {
	details := err.Error()
	if isProd.Load() {
		slog.Error("validation error", "error", details)
		details = "validation failed"
	}
	writeJSON(w, http.StatusUnprocessableEntity, map[string]interface{}{
		"error":   "validation failed",
		"details": details,
	})
}