HT_DASHBOARD/app/Models/HtpmsCustomer/HtpmsCustomerConnectionSwitch.php

<?php

namespace App\Models\HtpmsCustomer;

use Illuminate\Support\Facades\DB;

class HtpmsCustomerConnectionSwitch
{
    public static function switch(int $customerId): void
    {
        $connectionsRoot = "database.connections";
        $connectionHtmsCustomer = "htpms_customer";

        $databaseNameKey = "{$connectionsRoot}.{$connectionHtmsCustomer}.database";
        $currentDatabaseName = config($databaseNameKey);

        $afterDatabaseName = "htpms_{$customerId}";

        if ($currentDatabaseName !== $afterDatabaseName) {
            $conf = [$databaseNameKey => $afterDatabaseName];
            config($conf);
            DB::reconnect($connectionHtmsCustomer);
        }
    }
}