TenantHostnameScope.php

<?php

namespace App\Http\Middleware;

use App\Tenant;
use Closure;
use HipsterJazzbo\Landlord\Facades\Landlord;

class TenantHostnameScope
{
    public function handle($request, Closure $next)
    {
        // Fetch the current subdomain
        $subdomain = $this->getSubdomain($request);
        
        // Check if any tenant has this hostname
        $tenant = Tenant::where("hostname", $subdomain)->first();

        if (!$tenant) {
            abort(404);
        }

        // Scope all subsequent queries to that tenant
        Landlord::addTenant($tenant);

        return $next($request);
    }

    protected function getSubdomain($request)
    {
        $parts = explode(".", $request->getHost());

        if (!count($parts) === 3) {
            abort(404);
        }

        return array_first($parts);
    }
}