Erdemkeren\TemporaryAccess\TokenGenerator

Complexity

Total Complexity

6

Size/Duplication

Total Lines	82
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	1

Test Coverage

Coverage

100%

Importance

Changes

0

6 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	4	1
A	generate()	0	6	1
A	fromPlain()	0	4	1
A	fromEncrypted()	0	4	1
A	encrypt()	0	4	1
A	makeToken()	0	4	1

<?php

namespace Erdemkeren\TemporaryAccess;

use Erdemkeren\TemporaryAccess\Contracts\TokenGeneratorInterface;

final class TokenGenerator implements TokenGeneratorInterface
{
    /**
     * The key to be used to encrypt the plain token.
     *
     * @var string
     */
    private $key;

    /**
     * TokenGenerator constructor.
     *
     * @param string $key The key to be used by the hash algorithm.
     */
    public function __construct($key)
    {
        $this->key = $key;
    }

    /**
     * Generate a new token.
     *
     * @param  int $length The length of the plain text to be generated.
     *
     * @return GenericToken
     */
    public function generate($length = 6)
    {
        $plainText = str_random($length);

        return $this->makeToken($this->encrypt($plainText), $plainText);
    }

    /**
     * Generate a token from the given plain text.
     *
     * @param  string $plainText The plain text.
     *
     * @return GenericToken
     */
    public function fromPlain($plainText)
    {
        return $this->makeToken($this->encrypt($plainText), $plainText);
    }

    /**
     * Generate a token from the given encrypted text.
     *
     * @param  string $encryptedText The encrypted text.
     *
     * @return GenericToken
     */
    public function fromEncrypted($encryptedText)
    {
        return $this->makeToken($encryptedText);
    }

    /**
     * Get the hashed version of the generated token.
     *
     * @param  string $plainText
     *
     * @return string
     */
    private function encrypt($plainText)
    {
        return hash_hmac('sha256', $plainText, $this->key);
    }

    /**
     * Create a new token instance with the given parameters.
     *
     * @param  string      $encryptedText
     * @param  string|null $plainText
     *
     * @return GenericToken
     */
    private function makeToken($encryptedText, $plainText = null)
    {
        return new GenericToken($encryptedText, $plainText);
    }
}