feat: initial commit

internal/http/handler/webui/common/error_page.go

@@ -0,0 +1,48 @@
+package common
+
+import (
+	"log/slog"
+	"net/http"
+
+	"forge.cadoles.com/wpetit/kouiz/internal/http/handler/webui/common/component"
+	"github.com/a-h/templ"
+	"github.com/pkg/errors"
+)
+
+type HTTPError interface {
+	error
+	StatusCode() int
+}
+
+type UserFacingError interface {
+	error
+	UserMessage() string
+}
+
+func HandleError(w http.ResponseWriter, r *http.Request, err error) {
+	vmodel := component.ErrorPageVModel{}
+
+	statusCode := http.StatusInternalServerError
+
+	var httpErr HTTPError
+	if errors.As(err, &httpErr) {
+		statusCode = httpErr.StatusCode()
+	}
+
+	w.WriteHeader(statusCode)
+
+	var userFacingErr UserFacingError
+	if errors.As(err, &userFacingErr) {
+		vmodel.Message = userFacingErr.UserMessage()
+	} else {
+		vmodel.Message = http.StatusText(statusCode)
+	}
+
+	if httpErr == nil && userFacingErr == nil {
+		slog.ErrorContext(r.Context(), "unexpected error", slog.Any("error", errors.WithStack(err)))
+	}
+
+	errorPage := component.ErrorPage(vmodel)
+
+	templ.Handler(errorPage).ServeHTTP(w, r)
+}