GoogleTokenGenerator::rl() - Code Metrics - Inspection of "Update GoogleTokenGenerator" - Stichoza/google-translate-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#145)

unknown

created 2020-07-31 23:05 UTC

GoogleTokenGenerator::rl() A

↳ Parent: GoogleTokenGenerator

Complexity

Conditions	5
Paths	9

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	10
rs	9.6111
c	0
b	0
f	0
cc	5
nc	9
nop	2

<?php

namespace Stichoza\GoogleTranslate\Tokens;

/**
 * Google token generator.
 *
 * @link https://github.com/Stichoza/google-translate-php/issues/32 Thanks to @helen5106 and @tehmaestro and few other cool guys
 * {@inheritDoc}
 */
class GoogleTokenGenerator implements TokenProviderInterface
{
    /**
     * @var array Token keys
     */
    protected const TKK = ['406398', 2087938574];
    
    /**
     * @var string Character encoding
     */
    protected $encoding;
    
    /**
     * @var string[] Generated tokens
     */
    protected $tokens = [];
    
    /**
     * Creates new instance.
     * 
     * @param string $encoding Character encoding
     * @return void

     */
    public function __construct(string $encoding = 'UTF-8')
    {
        $this->encoding = $encoding;
    }
    
    /**
     * Generate and return a token.
     *
     * @param string $source Source language
     * @param string $target Target language
     * @param string $text Text to translate
     * @return string Token
     */
    public function generateToken(string $source, string $target, string $text): string
    {
        $hash = md5($text);
        if (isset($this->tokens[$hash])) {
            return $this->tokens[$hash];
        }
        
        $b = static::TKK[0];
        for ($d = [], $e = 0, $f = 0; $f < $this->length($text); $f++) {
            $g = $this->charCodeAt($text, $f);
            if (128 > $g) {
                $d[$e++] = $g;
            } else {
                if (2048 > $g) {
                    $d[$e++] = $g >> 6 | 192;
                } else {
                    if (55296 === ($g & 64512) && $f + 1 < $this->length($text) && 56320 === ($this->charCodeAt($text, $f + 1) & 64512)) {
                        $g = 65536 + (($g & 1023) << 10) + ($this->charCodeAt($text, ++$f) & 1023);
                        $d[$e++] = $g >> 18 | 240;
                        $d[$e++] = $g >> 12 & 63 | 128;
                    } else {
                        $d[$e++] = $g >> 12 | 224;
                    }
                    $d[$e++] = $g >> 6 & 63 | 128;
                }
                $d[$e++] = $g & 63 | 128;
            }
        }
        $text = $b;
        for ($e = 0; $e < count($d); $e++) {
for ($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
}
            $text = $this->rl($text + $d[$e], '+-a^+6');
        }
        $text = $this->rl($text, '+-3^+b+-f');
        $text ^= static::TKK[1];
        if (0 > $text) {
            $text = ($text & 2147483647) + 2147483648;
        }
        $text = fmod($text, pow(10, 6));
        
        $this->tokens[$hash] = $text . '.' . ($text ^ $b);
        
        return $this->tokens[$hash];
    }

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

    /**
     * JS unsigned right shift(`>>>`) implementation.
     * 
     * @link https://msdn.microsoft.com/en-us/library/342xfs5s(v=vs.94).aspx
     * @link http://stackoverflow.com/a/43359819/2953830
     * @param int $a
     * @param int $b
     * @return int
     */
    private function unsignedRightShift($a, $b): int
    {
        if ($b >= 32 || $b < -32) {
            $b -= intval($b / 32) * 32;
        }
        if ($b < 0) {
            $b += 32;
        }
        
        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;
    }

    /**
     * Get JS `charCodeAt()` equivalent result.
     *
     * @param string $str
     * @param int    $index
     * @return int
     */
    private function charCodeAt(string $str, int $index): int
    {
        return mb_ord(mb_substr($str, $index, 1, $this->encoding), $this->encoding);
    }

    /**
     * Get JS equivalent string `length`.
     *
     * @param string $str
     * @return int
     */
    private function length(string $str): int
    {
        return mb_strlen($str, $this->encoding);
    }
}


1			<?php
2
3			namespace Stichoza\GoogleTranslate\Tokens;
4
5			/**
6			* Google token generator.
7			*
8			* @link https://github.com/Stichoza/google-translate-php/issues/32 Thanks to @helen5106 and @tehmaestro and few other cool guys
9			* {@inheritDoc}
10			*/
11			class GoogleTokenGenerator implements TokenProviderInterface
12			{
13			/**
14			* @var array Token keys
15			*/
16			protected const TKK = ['406398', 2087938574];
17
18			/**
19			* @var string Character encoding
20			*/
21			protected $encoding;
22
23			/**
24			* @var string[] Generated tokens
25			*/
26			protected $tokens = [];
27
28			/**
29			* Creates new instance.
30			*
31			* @param string $encoding Character encoding
32			* @return void
			0 ignored issues – show Comprehensibility Best Practice introduced 2020-07-31 23:06 UTC by Report Bug Copy Issue Report Adding a `@return` annotation to constructors is generally not recommended as a constructor does not have a meaningful return value. Adding a `@return` annotation to a constructor is not recommended, since a constructor does not have a meaningful return value. Please refer to the PHP core documentation on constructors. Loading history...
33			*/
34			public function __construct(string $encoding = 'UTF-8')
35			{
36			$this->encoding = $encoding;
37			}
38
39			/**
40			* Generate and return a token.
41			*
42			* @param string $source Source language
43			* @param string $target Target language
44			* @param string $text Text to translate
45			* @return string Token
46			*/
47			public function generateToken(string $source, string $target, string $text): string
48			{
49			$hash = md5($text);
50			if (isset($this->tokens[$hash])) {
51			return $this->tokens[$hash];
52			}
53
54			$b = static::TKK[0];
55			for ($d = [], $e = 0, $f = 0; $f < $this->length($text); $f++) {
56			$g = $this->charCodeAt($text, $f);
57			if (128 > $g) {
58			$d[$e++] = $g;
59			} else {
60			if (2048 > $g) {
61			$d[$e++] = $g >> 6 \| 192;
62			} else {
63			if (55296 === ($g & 64512) && $f + 1 < $this->length($text) && 56320 === ($this->charCodeAt($text, $f + 1) & 64512)) {
64			$g = 65536 + (($g & 1023) << 10) + ($this->charCodeAt($text, ++$f) & 1023);
65			$d[$e++] = $g >> 18 \| 240;
66			$d[$e++] = $g >> 12 & 63 \| 128;
67			} else {
68			$d[$e++] = $g >> 12 \| 224;
69			}
70			$d[$e++] = $g >> 6 & 63 \| 128;
71			}
72			$d[$e++] = $g & 63 \| 128;
73			}
74			}
75			$text = $b;
76			for ($e = 0; $e < count($d); $e++) {
			0 ignored issues – show Performance Best Practice introduced 2020-07-31 23:06 UTC by Report Bug Copy Issue Report It seems like you are calling the size function `count()` as part of the test condition. You might want to compute the size beforehand, and not on each iteration. If the size of the collection does not change during the iteration, it is generally a good practice to compute it beforehand, and not on each iteration: for ($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 } Loading history...
77			$text = $this->rl($text + $d[$e], '+-a^+6');
78			}
79			$text = $this->rl($text, '+-3^+b+-f');
80			$text ^= static::TKK[1];
81			if (0 > $text) {
82			$text = ($text & 2147483647) + 2147483648;
83			}
84			$text = fmod($text, pow(10, 6));
85
86			$this->tokens[$hash] = $text . '.' . ($text ^ $b);
87
88			return $this->tokens[$hash];
89			}
90
91			/**
92			* Process token data by applying multiple operations.
93			* (Parameters are safe, no need for multibyte functions)
94			*
95			* @param int $a
96			* @param string $b
97			* @return int
98			*/
99			private function rl(int $a, string $b): int
100			{
101			for ($c = 0; $c < strlen($b) - 2; $c += 3) {
102			$d = $b[$c + 2];
103			$d = 'a' <= $d ? ord($d[0]) - 87 : (int) $d;
104			$d = '+' === $b[$c + 1] ? $this->unsignedRightShift($a, $d) : $a << $d;
105			$a = '+' === $b[$c] ? ($a + $d & 4294967295) : $a ^ $d;
106			}
107			return $a;
108			}
109
110			/**
111			* JS unsigned right shift(`>>>`) implementation.
112			*
113			* @link https://msdn.microsoft.com/en-us/library/342xfs5s(v=vs.94).aspx
114			* @link http://stackoverflow.com/a/43359819/2953830
115			* @param int $a
116			* @param int $b
117			* @return int
118			*/
119			private function unsignedRightShift($a, $b): int
120			{
121			if ($b >= 32 \|\| $b < -32) {
122			$b -= intval($b / 32) * 32;
123			}
124			if ($b < 0) {
125			$b += 32;
126			}
127
128			if ($b === 0) {
129			return (($a >> 1) & 0x7fffffff) * 2 + (($a >> $b) & 1);
130			}
131
132			if ($a < 0) {
133			$a = $a >> 1;
134			$a &= 2147483647;
135			$a \|= 0x40000000;
136			$a = ($a >> ($b - 1));
137			} else {
138			$a = $a >> $b;
139			}
140
141			return $a;
142			}
143
144			/**
145			* Get JS `charCodeAt()` equivalent result.
146			*
147			* @param string $str
148			* @param int $index
149			* @return int
150			*/
151			private function charCodeAt(string $str, int $index): int
152			{
153			return mb_ord(mb_substr($str, $index, 1, $this->encoding), $this->encoding);
154			}
155
156			/**
157			* Get JS equivalent string `length`.
158			*
159			* @param string $str
160			* @return int
161			*/
162			private function length(string $str): int
163			{
164			return mb_strlen($str, $this->encoding);
165			}
166			}
167

Stichoza / google-translate-php

Pull Request — master (#145)

GoogleTokenGenerator::rl() A

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