Context isolation for the debug log window

ts/windows/debuglog/preload.ts

@@ -0,0 +1,44 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import React from 'react';
+import ReactDOM from 'react-dom';
+import { contextBridge, ipcRenderer } from 'electron';
+
+// It is important to call this as early as possible
+import '../context';
+
+import { SignalWindow } from '../configure';
+import { DebugLogWindow } from '../../components/DebugLogWindow';
+import * as debugLog from '../../logging/debuglogs';
+
+contextBridge.exposeInMainWorld('SignalWindow', {
+  ...SignalWindow,
+  renderWindow: () => {
+    const environmentText: Array<string> = [SignalWindow.getEnvironment()];
+
+    const appInstance = SignalWindow.getAppInstance();
+    if (appInstance) {
+      environmentText.push(appInstance);
+    }
+
+    ReactDOM.render(
+      React.createElement(DebugLogWindow, {
+        closeWindow: () => ipcRenderer.send('close-debug-log'),
+        downloadLog: (logText: string) =>
+          ipcRenderer.send('show-debug-log-save-dialog', logText),
+        i18n: SignalWindow.i18n,
+        fetchLogs() {
+          return debugLog.fetch(
+            SignalWindow.getNodeVersion(),
+            SignalWindow.getVersion()
+          );
+        },
+        uploadLogs(logs: string) {
+          return debugLog.upload(logs, SignalWindow.getVersion());
+        },
+      }),
+      document.getElementById('app')
+    );
+  },
+});