feat: refactoring auth & add email password login (#318)

* feat: wip

* fix: issues

* feat: clean controllers and services

* fix: test

* Fix auth

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

server/src/core/auth/controllers/google-auth.controller.ts

@@ -0,0 +1,54 @@
+import {
+  Controller,
+  Get,
+  InternalServerErrorException,
+  Req,
+  Res,
+  UseGuards,
+} from '@nestjs/common';
+import { AuthGuard } from '@nestjs/passport';
+import { Response } from 'express';
+import { GoogleRequest } from '../strategies/google.auth.strategy';
+import { UserService } from '../../user/user.service';
+import { assertNotNull } from 'src/utils/assert';
+import { TokenService } from '../services/token.service';
+
+@Controller('auth/google')
+export class GoogleAuthController {
+  constructor(
+    private readonly tokenService: TokenService,
+    private readonly userService: UserService,
+  ) {}
+
+  @Get()
+  @UseGuards(AuthGuard('google'))
+  async googleAuth() {
+    // As this method is protected by Google Auth guard, it will trigger Google SSO flow
+    return;
+  }
+
+  @Get('redirect')
+  @UseGuards(AuthGuard('google'))
+  async googleAuthRedirect(@Req() req: GoogleRequest, @Res() res: Response) {
+    const { firstName, lastName, email } = req.user;
+    const displayName = [firstName, lastName].filter(assertNotNull).join(' ');
+
+    const user = await this.userService.createUser({
+      data: {
+        email,
+        displayName,
+        locale: 'en',
+      },
+    });
+
+    if (!user) {
+      throw new InternalServerErrorException(
+        'User email domain does not match an existing workspace',
+      );
+    }
+
+    const loginToken = await this.tokenService.generateLoginToken(user.email);
+
+    return res.redirect(this.tokenService.computeRedirectURI(loginToken.token));
+  }
+}