Translated error messages

src/util/error_i18n.ts

@@ -0,0 +1,19 @@
+import {InjectedIntl} from 'react-intl';
+import {TopolaError} from './error';
+
+/**
+ * Returns a translated message for the given error. If the message can't be
+ * translated, the original error.message is returned.
+ */
+export function getI18nMessage(error: Error, intl: InjectedIntl): string {
+  if (!(error instanceof TopolaError)) {
+    return error.message;
+  }
+  return intl.formatMessage(
+    {
+      id: `error.${error.code}`,
+      defaultMessage: error.message,
+    },
+    error.args,
+  );
+}