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Add a isValid method #33

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Add a isValid method #33

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9 changes: 9 additions & 0 deletions src/Ulid.php
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Original file line number Diff line number Diff line change
Expand Up @@ -166,4 +166,13 @@ private function decodeTime(string $time): int

return $carry;
}

public static function isValid(String $ulid)
{
if (strlen($ulid) !== static::TIME_LENGTH + static::RANDOM_LENGTH) {
return false;
}

return !preg_match('/[^abcdefghjkmnpqrstvwxyz0-9]/i', $ulid);
}
}
16 changes: 16 additions & 0 deletions tests/UlidTest.php
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Expand Up @@ -144,4 +144,20 @@ public function testAddsRandomnessWhenGeneratedMultipleTimesByFromTimestamp(): v
$this->assertEquals(substr($a, 0, -1), substr($b, 0, -1));
$this->assertNotEquals($a->getRandomness(), $b->getRandomness());
}

public function testValidateUlid(): void
{
//contain invalidate letter i at the end
$res = Ulid::isValid('01b8kyr6g8bc61ce8r6k2t16hi');
$res2 = Ulid::isValid('01b8kyr6g8bc61ce8r6k2t16hy');
$res3 = Ulid::isValid('00000000000000000000longerthan26');
$res4 = Ulid::isValid(Ulid::generate());
$res5 = Ulid::isValid(Ulid::generate(true));

$this->assertFalse($res);
$this->assertTrue($res2);
$this->assertFalse($res3);
$this->assertTrue($res4);
$this->assertTrue($res5);
}
}