AuthServiceProvider.php
<?php

namespace App\Providers;

// use Illuminate\Support\Facades\Gate;
use Illuminate\Foundation\Support\Providers\AuthServiceProvider as ServiceProvider;
use App\Models\Enums\UserRole;
use Illuminate\Support\Facades\Gate;

class AuthServiceProvider extends ServiceProvider
{
    /**
     * The model to policy mappings for the application.
     *
     * @var array<class-string, class-string>
     */
    protected $policies = [
        // 'App\Models\Model' => 'App\Policies\ModelPolicy',
    ];

    /**
     * Register any authentication / authorization services.
     */
    public function boot(): void
    {
        $this->registerPolicies();

        // Posts permissions
        Gate::define('posts.list', function ($user) {
            return in_array($user->role, [
                UserRole::ADMIN,
                UserRole::PUBLISHER,
                UserRole::AUTHOR,
            ]);
        });

        Gate::define('posts.edit', function ($user) {
            return in_array($user->role, [
                UserRole::ADMIN,
                UserRole::PUBLISHER,
                UserRole::AUTHOR,
            ]);
        });

        Gate::define('posts.publish', function ($user) {
            return in_array($user->role, [
                UserRole::ADMIN,
                UserRole::PUBLISHER,
                UserRole::AUTHOR,
            ]);
        });

        Gate::define('posts.delete', function ($user) {
            return in_array($user->role, [
                UserRole::ADMIN,
                UserRole::PUBLISHER,
                UserRole::AUTHOR,
            ]);
        });

        // Topics permissions
        Gate::define('topics.list', function ($user) {
            return in_array($user->role, [
                UserRole::ADMIN,
                UserRole::PUBLISHER,
                UserRole::AUTHOR,
            ]);
        });

        Gate::define('topics.edit', function ($user) {
            return in_array($user->role, [
                UserRole::ADMIN,
                UserRole::PUBLISHER,
                UserRole::AUTHOR,
            ]);
        });

        Gate::define('topics.publish', function ($user) {
            return in_array($user->role, [
                UserRole::ADMIN,
                UserRole::PUBLISHER,
                UserRole::AUTHOR,
            ]);
        });

        Gate::define('topics.delete', function ($user) {
            return in_array($user->role, [
                UserRole::ADMIN,
                UserRole::PUBLISHER,
                UserRole::AUTHOR,
            ]);
        });

        // Authors permissions
        Gate::define('authors.list', function ($user) {
            return in_array($user->role, [
                UserRole::ADMIN,
                UserRole::PUBLISHER,
            ]);
        });

        Gate::define('authors.edit', function ($user) {
            return in_array($user->role, [
                UserRole::ADMIN,
                UserRole::PUBLISHER,
            ]);
        });

        // Users permissions
        Gate::define('users.list', function ($user) {
            return $user->role === UserRole::ADMIN;
        });

        Gate::define('users.edit', function ($user) {
            return $user->role === UserRole::ADMIN;
        });

        // Settings permissions
        Gate::define('settings.edit', function ($user) {
            return in_array($user->role, [
                UserRole::ADMIN,
                UserRole::PUBLISHER,
            ]);
        });
    }
}