GoogleTokenGenerator::TL()   B
last analyzed

Complexity

Conditions 10
Paths 40

Size

Total Lines 38
Code Lines 28

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
eloc 28
dl 0
loc 38
c 0
b 0
f 0
rs 7.6666
cc 10
nc 40
nop 1

How to fix   Complexity   

Long Method

Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.

For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.

Commonly applied refactorings include:

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<?php
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namespace Stichoza\GoogleTranslate\Tokens;
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/**
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 * Google Token Generator.
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 *
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 * Thanks to @helen5106 and @tehmaestro and few other cool guys
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 * at https://github.com/Stichoza/google-translate-php/issues/32
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 */
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class GoogleTokenGenerator implements TokenProviderInterface
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{
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    /**
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     * Generate and return a token.
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     *
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     * @param string $source Source language
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     * @param string $target Target language
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     * @param string $text   Text to translate
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     *
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     * @return mixed A token
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     */
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    public function generateToken($source, $target, $text)
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    {
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        return $this->TL($text);
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    }
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    /**
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     * Generate a valid Google Translate request token.
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     *
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     * @param string $a text to translate
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     *
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     * @return string
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     */
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    private function TL($a)
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    {
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        $tkk = $this->TKK();
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        $b = $tkk[0];
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        for ($d = [], $e = 0, $f = 0; $f < mb_strlen($a, 'UTF-8'); $f++) {
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            $g = $this->charCodeAt($a, $f);
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            if (128 > $g) {
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                $d[$e++] = $g;
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            } else {
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                if (2048 > $g) {
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                    $d[$e++] = $g >> 6 | 192;
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                } else {
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                    if (55296 == ($g & 64512) && $f + 1 < mb_strlen($a, 'UTF-8') && 56320 == ($this->charCodeAt($a, $f + 1) & 64512)) {
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                        $g = 65536 + (($g & 1023) << 10) + ($this->charCodeAt($a, ++$f) & 1023);
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                        $d[$e++] = $g >> 18 | 240;
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                        $d[$e++] = $g >> 12 & 63 | 128;
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                    } else {
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                        $d[$e++] = $g >> 12 | 224;
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                    }
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                    $d[$e++] = $g >> 6 & 63 | 128;
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                }
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                $d[$e++] = $g & 63 | 128;
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            }
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        }
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        $a = $b;
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        for ($e = 0; $e < count($d); $e++) {
0 ignored issues
show
Performance Best Practice introduced by
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.

If the size of the collection does not change during the iteration, it is generally a good practice to compute it beforehand, and not on each iteration:

for ($i=0; $i<count($array); $i++) { // calls count() on each iteration
}

// Better
for ($i=0, $c=count($array); $i<$c; $i++) { // calls count() just once
}
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            $a += $d[$e];
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            $a = $this->RL($a, '+-a^+6');
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        }
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        $a = $this->RL($a, '+-3^+b+-f');
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        $a ^= $tkk[1] ? $tkk[1] + 0 : 0;
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        if (0 > $a) {
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            $a = ($a & 2147483647) + 2147483648;
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        }
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        $a = fmod($a, pow(10, 6));
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        return $a.'.'.($a ^ $b);
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    }
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    /**
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     * @return array
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     */
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    private function TKK()
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    {
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        return ['406398', (561666268 + 1526272306)];
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    }
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    /**
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     * Process token data by applying multiple operations.
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     * (Params are safe, no need for multibyte functions)
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     *
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     * @param int $a
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     * @param string $b
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     *
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     * @return int
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     */
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    private function RL($a, $b)
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    {
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        for ($c = 0; $c < strlen($b) - 2; $c += 3) {
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            $d = $b[$c + 2];
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            $d = 'a' <= $d ? ord($d[0]) - 87 : intval($d);
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            $d = '+' == $b[$c + 1] ? $this->unsignedRightShift($a, $d) : $a << $d;
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            $a = '+' == $b[$c] ? ($a + $d & 4294967295) : $a ^ $d;
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        }
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        return $a;
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    }
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    /**
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     * Unsigned right shift implementation
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     * https://msdn.microsoft.com/en-us/library/342xfs5s(v=vs.94).aspx
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     * http://stackoverflow.com/a/43359819/2953830
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     *
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     * @param $a
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     * @param $b
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     *
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     * @return number
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     */
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    private function unsignedRightShift($a, $b)
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    {
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        if ($b >= 32 || $b < -32) {
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            $m = (int)($b / 32);
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            $b = $b - ($m * 32);
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        }
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        if ($b < 0) {
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            $b = 32 + $b;
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        }
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        if ($b == 0) {
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            return (($a >> 1) & 0x7fffffff) * 2 + (($a >> $b) & 1);
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        }
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        if ($a < 0) {
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            $a = ($a >> 1);
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            $a &= 2147483647;
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            $a |= 0x40000000;
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            $a = ($a >> ($b - 1));
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        } else { 
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            $a = ($a >> $b);
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        }
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        return $a;
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    }
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    /**
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     * Get the Unicode of the character at the specified index in a string.
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     *
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     * @param string $str
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     * @param int    $index
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     *
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     * @return null|number
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     */
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    private function charCodeAt($str, $index)
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    {
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        $char = mb_substr($str, $index, 1, 'UTF-8');
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        if (mb_check_encoding($char, 'UTF-8')) {
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            $ret = mb_convert_encoding($char, 'UTF-32BE', 'UTF-8');
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            $result = hexdec(bin2hex($ret));
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            return $result;
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        }
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        return;
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    }
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}
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