ScoperAutoloadGenerator::__construct() - Code Metrics - Inspection of "Allow to whitelist functions (#241)" - humbug/php-scoper - Measure and Improve Code Quality continuously with Scrutinizer

Test Setup Failed

Push — master ( 683e75...bdd6cd )

by Théo

created 2018-07-03 20:35 UTC

ScoperAutoloadGenerator::__construct() A

↳ Parent: ScoperAutoloadGenerator

Complexity

Conditions	1
Paths	1

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	4
CRAP Score	1

Importance

Changes

Metric	Value
cc	1
nc	1
nop	1
dl	0
loc	4
ccs	4
cts	4
cp	1
crap	1
rs	10
c	0
b	0
f	0

<?php

declare(strict_types=1);

/*
 * This file is part of the humbug/php-scoper package.
 *
 * Copyright (c) 2017 Théo FIDRY <[email protected]>,
 *                    Pádraic Brady <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Humbug\PhpScoper\Autoload;

use Humbug\PhpScoper\PhpParser\NodeVisitor\Collection\WhitelistedFunctionCollection;
use Humbug\PhpScoper\Whitelist;
use PhpParser\Node\Name\FullyQualified;
use const PHP_EOL;
use function array_map;
use function array_unshift;
use function count;
use function iterator_to_array;
use function sprintf;
use function str_repeat;
use function str_replace;

final class ScoperAutoloadGenerator
{
    private $whitelist;

    public function __construct(Whitelist $whitelist)
    {
        $this->whitelist = $whitelist;
    }

    public function dump(string $prefix): string
    {
        $whitelistedFunctions = $this->whitelist->getWhitelistedFunctions();

        $hasNamespacedFunctions = $this->hasNamespacedFunctions($whitelistedFunctions);

        $statements = implode(PHP_EOL, $this->createClassAliasStatements($prefix, $hasNamespacedFunctions)).PHP_EOL.PHP_EOL;
        $statements .= implode(PHP_EOL, $this->createFunctionAliasStatements($whitelistedFunctions, $hasNamespacedFunctions));

        if ($hasNamespacedFunctions) {
            $dump = <<<PHP
<?php

// scoper-autoload.php @generated by PhpScoper

namespace {
    \$loader = require_once __DIR__.'/autoload.php';
}

$statements

namespace {
    return \$loader;
}

PHP;
        } else {
            $dump = <<<PHP
<?php

// scoper-autoload.php @generated by PhpScoper

\$loader = require_once __DIR__.'/autoload.php';

$statements

return \$loader;

PHP;
        }

        $dump = $this->cleanAutoload($dump);

        return $dump;
    }

    /**
     * @return string[]
     */
    private function createClassAliasStatements(string $prefix, bool $hasNamespacedFunctions): array
    {
        $statements = array_map(
            function (string $whitelistedElement) use ($prefix): string {
                return sprintf(
                    'class_exists(\'%s\%s\');',
                    $prefix,
                    $whitelistedElement
                );
            },
            $this->whitelist->getClassWhitelistArray()
        );

        if ([] === $statements) {
            return $statements;
        }

        if ($hasNamespacedFunctions) {
            $statements = array_map(
                function (string $statement): string {
                    return str_repeat(' ', 4).$statement;
                },
                $statements
            );

            array_unshift($statements, 'namespace {');
            $statements[] = '}'.PHP_EOL;
        }

        array_unshift(
            $statements,
            <<<'EOF'
// Aliases for the whitelisted classes. For more information see:
// https://github.com/humbug/php-scoper/blob/master/README.md#class-whitelisting
EOF
        );

        return $statements;
    }

    /**
     * @return string[]
     */
    private function createFunctionAliasStatements(
        WhitelistedFunctionCollection $whitelistedFunctions,
        bool $hasNamespacedFunctions
    ): array {
        $statements = array_map(
            function (array $node) use ($hasNamespacedFunctions): string {
                /**
                 * @var FullyQualified
                 * @var FullyQualified $alias
                 */
                [$original, $alias] = $node;


                if ($hasNamespacedFunctions) {
                    $namespace = $original->slice(0, -1);

                    return sprintf(
                        <<<'PHP'
namespace %s{
    if (!function_exists('%s')) {
        function %s() {
            return \%s(...func_get_args());
        }
    }
}
PHP
                        ,
                        null === $namespace ? '' : $namespace->toString().' ',
                        $original->toString(),
                        null === $namespace ? $original->toString() : $original->slice(1)->toString(),
                        $alias->toString()
                    );
                }

                return sprintf(
                    <<<'PHP'
if (!function_exists('%1$s')) {
    function %1$s() {
        return \%2$s(...func_get_args());
    }
}
PHP
                    ,
                    $original->toString(),
                    $alias->toString()
                );
            },
            iterator_to_array($whitelistedFunctions)
        );

        if ([] === $statements) {
            return $statements;
        }

        array_unshift(
            $statements,
            <<<'EOF'
// Functions whitelisting. For more information see:
// https://github.com/humbug/php-scoper/blob/master/README.md#functions-whitelisting
EOF
        );

        return $statements;
    }

    private function hasNamespacedFunctions(WhitelistedFunctionCollection $functions): bool
    {
        foreach ($functions as [$original, $alias]) {
            /**
             * @var FullyQualified
             * @var FullyQualified $alias
             */
            if (count($original->parts) > 1) {

                return true;
            }
        }

        return false;
    }

    private function cleanAutoload(string $dump): string
    {
        $cleanedDump = $dump;

        do {
            $dump = $cleanedDump;
            $cleanedDump = str_replace("\n\n\n", "\n\n", $dump);
        } while ($cleanedDump !== $dump);

        return $dump;
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		/*
6		* This file is part of the humbug/php-scoper package.
7		*
8		* Copyright (c) 2017 Théo FIDRY <[email protected]>,
9		* Pádraic Brady <[email protected]>
10		*
11		* For the full copyright and license information, please view the LICENSE
12		* file that was distributed with this source code.
13		*/
14
15		namespace Humbug\PhpScoper\Autoload;
16
17		use Humbug\PhpScoper\PhpParser\NodeVisitor\Collection\WhitelistedFunctionCollection;
18		use Humbug\PhpScoper\Whitelist;
19		use PhpParser\Node\Name\FullyQualified;
20		use const PHP_EOL;
21		use function array_map;
22		use function array_unshift;
23		use function count;
24	1	use function iterator_to_array;
25		use function sprintf;
26	1	use function str_repeat;
27		use function str_replace;
28
29	1	final class ScoperAutoloadGenerator
30		{
31	1	private $whitelist;
32
33	1	public function __construct(Whitelist $whitelist)
34	1	{
35	1	$this->whitelist = $whitelist;
36	1	}
37
38	1	public function dump(string $prefix): string
39	1	{
40		$whitelistedFunctions = $this->whitelist->getWhitelistedFunctions();
41
42	1	$hasNamespacedFunctions = $this->hasNamespacedFunctions($whitelistedFunctions);
43
44		$statements = implode(PHP_EOL, $this->createClassAliasStatements($prefix, $hasNamespacedFunctions)).PHP_EOL.PHP_EOL;
45		$statements .= implode(PHP_EOL, $this->createFunctionAliasStatements($whitelistedFunctions, $hasNamespacedFunctions));
46
47		if ($hasNamespacedFunctions) {
48		$dump = <<<PHP
49		<?php
50
51	1	// scoper-autoload.php @generated by PhpScoper
52
53		namespace {
54		\$loader = require_once __DIR__.'/autoload.php';
55		}
56
57		$statements
58
59		namespace {
60		return \$loader;
61		}
62
63		PHP;
64		} else {
65		$dump = <<<PHP
66		<?php
67
68		// scoper-autoload.php @generated by PhpScoper
69
70		\$loader = require_once __DIR__.'/autoload.php';
71
72		$statements
73
74		return \$loader;
75
76		PHP;
77		}
78
79		$dump = $this->cleanAutoload($dump);
80
81		return $dump;
82		}
83
84		/**
85		* @return string[]
86		*/
87		private function createClassAliasStatements(string $prefix, bool $hasNamespacedFunctions): array
88		{
89		$statements = array_map(
90		function (string $whitelistedElement) use ($prefix): string {
91		return sprintf(
92		'class_exists(\'%s\%s\');',
93		$prefix,
94		$whitelistedElement
95		);
96		},
97		$this->whitelist->getClassWhitelistArray()
98		);
99
100		if ([] === $statements) {
101		return $statements;
102		}
103
104		if ($hasNamespacedFunctions) {
105		$statements = array_map(
106		function (string $statement): string {
107		return str_repeat(' ', 4).$statement;
108		},
109		$statements
110		);
111
112		array_unshift($statements, 'namespace {');
113		$statements[] = '}'.PHP_EOL;
114		}
115
116		array_unshift(
117		$statements,
118		<<<'EOF'
119		// Aliases for the whitelisted classes. For more information see:
120		// https://github.com/humbug/php-scoper/blob/master/README.md#class-whitelisting
121		EOF
122		);
123
124		return $statements;
125		}
126
127		/**
128		* @return string[]
129		*/
130		private function createFunctionAliasStatements(
131		WhitelistedFunctionCollection $whitelistedFunctions,
132		bool $hasNamespacedFunctions
133		): array {
134		$statements = array_map(
135		function (array $node) use ($hasNamespacedFunctions): string {
136		/**
137		* @var FullyQualified
138		* @var FullyQualified $alias
139		*/
140		[$original, $alias] = $node;
		0 ignored issues – show Bug introduced 2018-07-03 17:01 UTC by Report Bug Copy Issue Report The variable `$original` does not exist. Did you forget to declare it? This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug. Loading history... Bug introduced 2018-07-03 17:01 UTC by Report Bug Copy Issue Report The variable `$alias` does not exist. Did you forget to declare it? This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug. Loading history...
141
142		if ($hasNamespacedFunctions) {
143		$namespace = $original->slice(0, -1);
144
145		return sprintf(
146		<<<'PHP'
147		namespace %s{
148		if (!function_exists('%s')) {
149		function %s() {
150		return \%s(...func_get_args());
151		}
152		}
153		}
154		PHP
155		,
156		null === $namespace ? '' : $namespace->toString().' ',
157		$original->toString(),
158		null === $namespace ? $original->toString() : $original->slice(1)->toString(),
159		$alias->toString()
160		);
161		}
162
163		return sprintf(
164		<<<'PHP'
165		if (!function_exists('%1$s')) {
166		function %1$s() {
167		return \%2$s(...func_get_args());
168		}
169		}
170		PHP
171		,
172		$original->toString(),
173		$alias->toString()
174		);
175		},
176		iterator_to_array($whitelistedFunctions)
177		);
178
179		if ([] === $statements) {
180		return $statements;
181		}
182
183		array_unshift(
184		$statements,
185		<<<'EOF'
186		// Functions whitelisting. For more information see:
187		// https://github.com/humbug/php-scoper/blob/master/README.md#functions-whitelisting
188		EOF
189		);
190
191		return $statements;
192		}
193
194		private function hasNamespacedFunctions(WhitelistedFunctionCollection $functions): bool
195		{
196		foreach ($functions as [$original, $alias]) {
197		/**
198		* @var FullyQualified
199		* @var FullyQualified $alias
200		*/
201		if (count($original->parts) > 1) {
		0 ignored issues – show Bug introduced 2018-07-03 17:01 UTC by Report Bug Copy Issue Report The variable `$original` does not exist. Did you forget to declare it? This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug. Loading history...
202		return true;
203		}
204		}
205
206		return false;
207		}
208
209		private function cleanAutoload(string $dump): string
210		{
211		$cleanedDump = $dump;
212
213		do {
214		$dump = $cleanedDump;
215		$cleanedDump = str_replace("\n\n\n", "\n\n", $dump);
216		} while ($cleanedDump !== $dump);
217
218		return $dump;
219		}
220		}
221

humbug / php-scoper

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ScoperAutoloadGenerator::__construct() A

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