Genkgo\Mail\Mime\Boundary

Complexity

Total Complexity

9

Size/Duplication

Total Lines	67
Duplicated Lines	0 %

Coupling/Cohesion

Components	0
Dependencies	0

Test Coverage

Coverage

95.24%

Importance

Changes

0

5 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	6	1
A	__toString()	0	4	1
A	newRandomBoundary()	0	4	1
A	assert()	0	6	2
A	validate()	0	17	4

<?php
declare(strict_types=1);

namespace Genkgo\Mail\Mime;

final class Boundary
{
    /**
     * @var string
     */
    private $identifier;

    /**
     * Boundary constructor.
     * @param string $identifier
     */
    public function __construct(string $identifier)
    {
        $this->assert($identifier);

        $this->identifier = $identifier;
    }

    /**
     * @return string
     */
    public function __toString(): string
    {
        return $this->identifier;
    }

    /**
     * @return Boundary
     */
    public static function newRandomBoundary()
    {
        return new self('_part_' . bin2hex(random_bytes(6)));
    }

    /**
     * @param string $value
     */
    private function assert(string $value): void
    {
        if ($this->validate($value) === false) {
            throw new \InvalidArgumentException('Invalid header value ' . $value);
        }
    }

    /**
     * @param $value
     * @return bool
     */
    private function validate(string $value): bool
    {
        if ($value === '') {
            return false;
        }

        $length = strlen($value);
        if ($length > 70) {
            return false;
        }

        if ($value[$length - 1] === ' ') {
            return false;
        }

        return preg_match('/[^A-Za-z0-9\'\,\(\)\+\_\,\-\.\/\:\=\? ]/', $value) !== 1;
    }

}