feat: add helper process (#2753)

apps/electron/src/main/ui/google-auth.ts

@@ -0,0 +1,60 @@
+import { app, BrowserWindow, shell } from 'electron';
+import { parse } from 'url';
+
+import { logger } from '../logger';
+
+const redirectUri = 'https://affine.pro/client/auth-callback';
+
+export const oauthEndpoint = `https://accounts.google.com/o/oauth2/v2/auth?client_id=${process.env.AFFINE_GOOGLE_CLIENT_ID}&redirect_uri=${redirectUri}&response_type=code&scope=openid https://www.googleapis.com/auth/userinfo.email profile&access_type=offline&customParameters={"prompt":"select_account"}`;
+
+const tokenEndpoint = 'https://oauth2.googleapis.com/token';
+
+export const getExchangeTokenParams = (code: string) => {
+  const postData = {
+    code,
+    client_id: process.env.AFFINE_GOOGLE_CLIENT_ID || '',
+    client_secret: process.env.AFFINE_GOOGLE_CLIENT_SECRET || '',
+    redirect_uri: redirectUri,
+    grant_type: 'authorization_code',
+  };
+  const requestInit: RequestInit = {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/x-www-form-urlencoded',
+    },
+    body: new URLSearchParams(postData).toString(),
+  };
+  return { requestInit, url: tokenEndpoint };
+};
+
+export function getGoogleOauthCode() {
+  return new Promise<ReturnType<typeof getExchangeTokenParams>>(
+    (resolve, reject) => {
+      shell.openExternal(oauthEndpoint).catch(e => {
+        logger.error('Failed to open external url', e);
+        reject(e);
+      });
+      const handleOpenUrl = async (_: any, url: string) => {
+        const mainWindow = BrowserWindow.getAllWindows().find(
+          w => !w.isDestroyed()
+        );
+        const urlObj = parse(url.replace('??', '?'), true);
+        if (!mainWindow || !url.startsWith('affine://auth-callback')) return;
+        const code = urlObj.query['code'] as string;
+        if (!code) return;
+
+        logger.info('google sign in code received from callback', code);
+
+        app.removeListener('open-url', handleOpenUrl);
+        resolve(getExchangeTokenParams(code));
+      };
+
+      app.on('open-url', handleOpenUrl);
+
+      setTimeout(() => {
+        reject(new Error('Timed out'));
+        app.removeListener('open-url', handleOpenUrl);
+      }, 30000);
+    }
+  );
+}