Stichoza\GoogleTranslate\Tokens\GoogleTokenGenerator

Complexity

Total Complexity

18

Size/Duplication

Total Lines	112
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	0

Importance

Changes

0

5 Methods

Rating	Name	Duplication	Size	Complexity
A	generateToken()	0	4	1
A	TL()	0	22	5
A	TKK()	0	4	1
A	RL()	0	11	5
B	unsignedRightShift()	0	26	6

<?php

namespace Stichoza\GoogleTranslate\Tokens;

/**
 * Google Token Generator.
 *
 * Thanks to @helen5106 and @tehmaestro and few other cool guys
 * at https://github.com/Stichoza/google-translate-php/issues/32
 */
class GoogleTokenGenerator implements TokenProviderInterface
{
    /**
     * Generate and return a token.
     *
     * @param string $source Source language
     * @param string $target Target language
     * @param string $text   Text to translate
     *
     * @return mixed A token
     */
    public function generateToken($source, $target, $text)
    {
        return $this->TL($text);
    }

    /**
     * Generate a valid Google Translate request token.
     *
     * @param string $a text to translate
     *
     * @return string
     */
    private function TL($a)
    {
        $tkk = $this->TKK();
        $b = $tkk[0];

        for ($d = [], $e = 0, $f = 0; $f < strlen($a); $f++) {
            $d[$e++] = ord(substr($a, $f, 1));
        }
        $a = $b;
        for ($e = 0; $e < count($d); $e++) {

It seems like you are calling the size function count() as part of the test condition. You might want to compute the size beforehand, and not on each iteration.

            $a += $d[$e];
            $a = $this->RL($a, '+-a^+6');
        }
        $a = $this->RL($a, '+-3^+b+-f');
        $a ^= $tkk[1] ? $tkk[1] + 0 : 0;
        if (0 > $a) {
            $a = ($a & 2147483647) + 2147483648;
        }
        $a = fmod($a, pow(10, 6));

        return $a.'.'.($a ^ $b);
    }

    /**
     * @return array
     */
    private function TKK()
    {
        return ['406398', (561666268 + 1526272306)];
    }

    /**
     * Process token data by applying multiple operations.
     * (Params are safe, no need for multibyte functions)
     *
     * @param int $a
     * @param string $b
     *
     * @return int
     */
    private function RL($a, $b)
    {
        for ($c = 0; $c < strlen($b) - 2; $c += 3) {
            $d = $b[$c + 2];
            $d = 'a' <= $d ? ord($d[0]) - 87 : intval($d);
            $d = '+' == $b[$c + 1] ? $this->unsignedRightShift($a, $d) : $a << $d;
            $a = '+' == $b[$c] ? ($a + $d & 4294967295) : $a ^ $d;
        }

        return $a;
    }

    /**
     * Unsigned right shift implementation
     * https://msdn.microsoft.com/en-us/library/342xfs5s(v=vs.94).aspx
     * http://stackoverflow.com/a/43359819/2953830
     *
     * @param $a
     * @param $b
     *
     * @return number
     */
    private function unsignedRightShift($a, $b)
    {
        if ($b >= 32 || $b < -32) {
            $m = (int)($b / 32);
            $b = $b - ($m * 32);
        }

        if ($b < 0) {
            $b = 32 + $b;
        }

        if ($b == 0) {
            return (($a >> 1) & 0x7fffffff) * 2 + (($a >> $b) & 1);
        }

        if ($a < 0) {
            $a = ($a >> 1);
            $a &= 2147483647;
            $a |= 0x40000000;
            $a = ($a >> ($b - 1));
        } else { 
            $a = ($a >> $b);
        }

        return $a;
    }
}