feat: add basic admin dashboard

app/controllers/admin_controller.ts

@@ -0,0 +1,42 @@
+import UsersController from '#controllers/users_controller';
+import User from '#models/user';
+import { inject } from '@adonisjs/core';
+import type { HttpContext } from '@adonisjs/core/http';
+import db from '@adonisjs/lucid/services/db';
+
+class UserWithRelationCountDto {
+  constructor(private user: User) {}
+
+  public toJson() {
+    return {
+      id: this.user.id,
+      email: this.user.email,
+      fullname: this.user.name,
+      avatarUrl: this.user.avatarUrl,
+      isAdmin: this.user.isAdmin,
+      createdAt: this.user.createdAt,
+      updatedAt: this.user.updatedAt,
+      count: {
+        link: Number(this.user.$extras.totalLinks),
+        collection: Number(this.user.$extras.totalCollections),
+      },
+    };
+  }
+}
+
+@inject()
+export default class AdminController {
+  constructor(protected usersController: UsersController) {}
+
+  async index({ inertia }: HttpContext) {
+    const users = await this.usersController.getAllUsersWithTotalRelations();
+    const links = await db.from('links').count('* as total');
+    const collections = await db.from('collections').count('* as total');
+
+    return inertia.render('admin/dashboard', {
+      users: users.map((user) => new UserWithRelationCountDto(user).toJson()),
+      totalLinks: Number(links[0].total),
+      totalCollections: Number(collections[0].total),
+    });
+  }
+}

app/controllers/users_controller.ts

@@ -1,6 +1,7 @@
 import User from '#models/user';
 import type { HttpContext } from '@adonisjs/core/http';
 import logger from '@adonisjs/core/services/logger';
+import db from '@adonisjs/lucid/services/db';
 import { RouteName } from '@izzyjs/route/types';
 
 export default class UsersController {
@@ -30,6 +31,7 @@ export default class UsersController {
       return response.redirectToNamedRoute(this.redirectTo);
     }
 
+    const userCount = await db.from('users').count('* as total');
     const {
       email,
       id: providerId,
@@ -50,6 +52,7 @@ export default class UsersController {
         avatarUrl,
         token,
         providerType: 'google',
+        isAdmin: userCount[0].total === '0',
       }
     );
 
@@ -66,4 +69,10 @@ export default class UsersController {
     logger.info(`[${auth.user?.email}] disconnected successfully`);
     response.redirectToNamedRoute(this.redirectTo);
   }
+
+  async getAllUsersWithTotalRelations() {
+    return User.query()
+      .withCount('collections', (q) => q.as('totalCollections'))
+      .withCount('links', (q) => q.as('totalLinks'));
+  }
 }