osb/app/Models/TLD.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Str;

use App\Models\Service\Domain;

class TLD extends Model
{
	protected $table = 'tlds';

	/* RELATIONS */

	public function domains()
	{
		return $this->hasMany(Domain::class,'tld_id');
	}

	/* STATIC */

	/**
	 * Given a domain name, return the TLD component
	 *
	 * @param string $domainname
	 * @return TLD|null
	 */
	public static function domaintld(string $domainname): ?TLD
	{
		$tld = NULL;

		foreach (self::get() as $o) {
			// Find the most specific match
			if (preg_match('/'.$o->name.'$/i',$domainname) && (! $tld || (strlen($o->name) > strlen($tld->name))))
				$tld = $o;
		}

		return $tld;
	}

	/* ATTRIBUTES */

	public function getNameAttribute($value): string
	{
		return strtoupper($value);
	}

	/* METHOD */

	/**
	 * Given a domain name, return the domain part
	 *
	 * @param string $domainname
	 * @return string|null
	 */
	public function domain_part(string $domainname): ?string
	{
		$domainname = strtoupper($domainname);

		// Quick check that this domain is part of this model
		if (! Str::endsWith($domainname,'.'.$this->name))
			return NULL;

		return Str::replaceLast('.'.$this->name,'',$domainname);
	}
}