feat: add auth via google

app/controllers/users_controller.ts

@@ -0,0 +1,56 @@
+import User from '#models/user';
+import type { HttpContext } from '@adonisjs/core/http';
+import logger from '@adonisjs/core/services/logger';
+
+export default class UsersController {
+  private redirectTo = '/';
+
+  google = ({ ally }: HttpContext) => ally.use('google').redirect();
+
+  async callbackAuth({ ally, auth, response, session }: HttpContext) {
+    const google = ally.use('google');
+    if (google.accessDenied()) {
+      // TODO: translate error messages + show them in UI
+      session.flash('flash', 'Access was denied');
+      return response.redirect(this.redirectTo);
+    }
+
+    if (google.stateMisMatch()) {
+      session.flash('flash', 'Request expired. Retry again');
+      return response.redirect(this.redirectTo);
+    }
+
+    if (google.hasError()) {
+      session.flash('flash', google.getError() || 'Something went wrong');
+      return response.redirect(this.redirectTo);
+    }
+
+    const { email, id: providerId, name, nickName, avatarUrl, token } = await google.user();
+    const user = await User.updateOrCreate(
+      {
+        email,
+      },
+      {
+        email,
+        providerId,
+        name,
+        nickName,
+        avatarUrl,
+        token,
+      }
+    );
+
+    await auth.use('web').login(user);
+    session.flash('flash', 'Successfully authenticated');
+    logger.info(`[${user.email}] auth success`);
+
+    response.redirect('/');
+  }
+
+  async logout({ auth, response, session }: HttpContext) {
+    await auth.use('web').logout();
+    session.flash('flash', 'Successfully disconnected');
+    logger.info(`[${auth.user?.email}] disconnected successfully`);
+    response.redirect('/');
+  }
+}