Move all files under /app to typescript

app/global_errors.ts

@@ -0,0 +1,64 @@
+// Copyright 2018-2020 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { app, dialog, clipboard } from 'electron';
+
+import * as Errors from '../js/modules/types/errors';
+import { redactAll } from '../ts/util/privacy';
+import { LocaleMessagesType } from '../ts/types/I18N';
+import { reallyJsonStringify } from '../ts/util/reallyJsonStringify';
+
+// We use hard-coded strings until we're able to update these strings from the locale.
+let quitText = 'Quit';
+let copyErrorAndQuitText = 'Copy error and quit';
+
+function handleError(prefix: string, error: Error): void {
+  if (console._error) {
+    console._error(`${prefix}:`, Errors.toLogFormat(error));
+  }
+  console.error(`${prefix}:`, Errors.toLogFormat(error));
+
+  if (app.isReady()) {
+    // title field is not shown on macOS, so we don't use it
+    const buttonIndex = dialog.showMessageBoxSync({
+      buttons: [quitText, copyErrorAndQuitText],
+      defaultId: 0,
+      detail: redactAll(error.stack || ''),
+      message: prefix,
+      noLink: true,
+      type: 'error',
+    });
+
+    if (buttonIndex === 1) {
+      clipboard.writeText(`${prefix}\n\n${redactAll(error.stack || '')}`);
+    }
+  } else {
+    dialog.showErrorBox(prefix, error.stack || '');
+  }
+
+  app.exit(1);
+}
+
+export const updateLocale = (messages: LocaleMessagesType): void => {
+  quitText = messages.quit.message;
+  copyErrorAndQuitText = messages.copyErrorAndQuit.message;
+};
+
+function _getError(reason: unknown): Error {
+  if (reason instanceof Error) {
+    return reason;
+  }
+
+  const errorString = reallyJsonStringify(reason);
+  return new Error(`Promise rejected with a non-error: ${errorString}`);
+}
+
+export const addHandler = (): void => {
+  process.on('uncaughtException', (reason: unknown) => {
+    handleError('Unhandled Error', _getError(reason));
+  });
+
+  process.on('unhandledRejection', (reason: unknown) => {
+    handleError('Unhandled Promise Rejection', _getError(reason));
+  });
+};