ReflectionUtils::parseUsesAndAliases() - Code Metrics - Inspection of "Added ability to use aliases and classes without F..." - spatie/data-transfer-object - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#67)

unknown

created 2019-10-04 10:25 UTC

ReflectionUtils::parseUsesAndAliases() D

↳ Parent: ReflectionUtils

Complexity

Conditions	24
Paths	64

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	77
rs	4.1666
c	0
b	0
f	0
cc	24
nc	64
nop	2

How to fix Long Method Complexity

<?php

declare(strict_types=1);

namespace Spatie\DataTransferObject;

use ReflectionClass;
use RuntimeException;

class ReflectionUtils
{

    private const SKIPPED = [
        'string',
        'int',
        'integer',
        'float',
        'bool',
        'double',
        'array',
        'object',
        'callable',
        'callback',
        'iterable',
        'void',
        'null',
        'mixed',
    ];

    /**
     * @param string $type
     * @return bool
     */
    public static function isSkipped(string $type): bool
    {
        return in_array(strtolower($type), self::SKIPPED, true);
    }

    /**
     * @param ReflectionClass $class
     * @return array
     */
    public static function getUsesAndAliases(ReflectionClass $class): array
    {
        try {
            if ($class->isAnonymous()) {
                throw new RuntimeException('Anonymous classes are not supported.');
            }
            static $cache = [];
            if (! isset($cache[$name = $class->getName()])) {
                if ($class->isInternal()) {
                    $cache[$name] = [];
                } else {
                    $code = file_get_contents($class->getFileName());
                    $cache = self::parseUsesAndAliases($code, $name) + $cache;
                }
            }
            return $cache[$name];
        } catch (\Exception $exception) {


        }

        return [];
    }

    /**
     * @param string $code
     * @param string|null $forClass
     * @return array
     */
    private static function parseUsesAndAliases(string $code, string $forClass = null): array
    {
        try {
            $tokens = token_get_all($code, TOKEN_PARSE);
        } catch (\Exception $e) {
            $tokens = [];
        }
        $namespace = $class = $classLevel = $level = null;
        $res = $uses = [];

        while ($token = current($tokens)) {
            next($tokens);
            switch (is_array($token) ? $token[0] : $token) {
                case T_NAMESPACE:
                    $namespace = ltrim(self::fetch($tokens, [T_STRING, T_NS_SEPARATOR]).'\\', '\\');
                    $uses = [];
                    break;

                case T_CLASS:
                case T_INTERFACE:
                case T_TRAIT:
                    if ($name = self::fetch($tokens, T_STRING)) {
                        $class = $namespace.$name;
                        $classLevel = $level + 1;
                        $res[$class] = $uses;
                        if ($class === $forClass) {
                            return $res;
                        }
                    }
                    break;

                case T_USE:
                    while (! $class && ($name = self::fetch($tokens, [T_STRING, T_NS_SEPARATOR]))) {
''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
                        $name = ltrim($name, '\\');
                        if (self::fetch($tokens, '{')) {
''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
                            while ($suffix = self::fetch($tokens, [T_STRING, T_NS_SEPARATOR])) {
                                /* @noinspection NotOptimalIfConditionsInspection */
                                if (self::fetch($tokens, T_AS)) {
''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
                                    $uses[self::fetch($tokens, T_STRING)] = $name.$suffix;
                                } else {
                                    $tmp = explode('\\', $suffix);
                                    $uses[end($tmp)] = $name.$suffix;
                                }
                                if (! self::fetch($tokens, ',')) {
''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
                                    break;
                                }
                            }

                        } elseif (self::fetch($tokens, T_AS)) {
''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
                            $uses[self::fetch($tokens, T_STRING)] = $name;

                        } else {
                            $tmp = explode('\\', $name);
                            $uses[end($tmp)] = $name;
                        }
                        if (! self::fetch($tokens, ',')) {
''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
                            break;
                        }
                    }
                    break;

                case T_CURLY_OPEN:
                case T_DOLLAR_OPEN_CURLY_BRACES:
                case '{':
                    $level++;
                    break;

                case '}':
                    if ($level === $classLevel) {
                        $class = $classLevel = null;
                    }
                    $level--;
            }
        }

        return $res;
    }

    private static function fetch(&$tokens, $take): ?string
    {
        $res = null;
        while ($token = current($tokens)) {
            [$token, $s] = is_array($token) ? $token : [$token, $token];

            if (in_array($token, (array) $take, true)) {
                $res .= $s;
            } elseif (! in_array($token, [T_DOC_COMMENT, T_WHITESPACE, T_COMMENT], true)) {
                break;
            }
            next($tokens);
        }
        return $res;
    }
}


1			<?php
2
3			declare(strict_types=1);
4
5			namespace Spatie\DataTransferObject;
6
7			use ReflectionClass;
8			use RuntimeException;
9
10			class ReflectionUtils
11			{
12
13			private const SKIPPED = [
14			'string',
15			'int',
16			'integer',
17			'float',
18			'bool',
19			'double',
20			'array',
21			'object',
22			'callable',
23			'callback',
24			'iterable',
25			'void',
26			'null',
27			'mixed',
28			];
29
30			/**
31			* @param string $type
32			* @return bool
33			*/
34			public static function isSkipped(string $type): bool
35			{
36			return in_array(strtolower($type), self::SKIPPED, true);
37			}
38
39			/**
40			* @param ReflectionClass $class
41			* @return array
42			*/
43			public static function getUsesAndAliases(ReflectionClass $class): array
44			{
45			try {
46			if ($class->isAnonymous()) {
47			throw new RuntimeException('Anonymous classes are not supported.');
48			}
49			static $cache = [];
50			if (! isset($cache[$name = $class->getName()])) {
51			if ($class->isInternal()) {
52			$cache[$name] = [];
53			} else {
54			$code = file_get_contents($class->getFileName());
55			$cache = self::parseUsesAndAliases($code, $name) + $cache;
56			}
57			}
58			return $cache[$name];
59			} catch (\Exception $exception) {
			0 ignored issues – show Coding Style Comprehensibility introduced 2019-10-04 10:20 UTC by Report Bug Copy Issue Report Consider adding a comment why this CATCH block is empty. Loading history...
60
61			}
62
63			return [];
64			}
65
66			/**
67			* @param string $code
68			* @param string\|null $forClass
69			* @return array
70			*/
71			private static function parseUsesAndAliases(string $code, string $forClass = null): array
72			{
73			try {
74			$tokens = token_get_all($code, TOKEN_PARSE);
75			} catch (\Exception $e) {
76			$tokens = [];
77			}
78			$namespace = $class = $classLevel = $level = null;
79			$res = $uses = [];
80
81			while ($token = current($tokens)) {
82			next($tokens);
83			switch (is_array($token) ? $token[0] : $token) {
84			case T_NAMESPACE:
85			$namespace = ltrim(self::fetch($tokens, [T_STRING, T_NS_SEPARATOR]).'\\', '\\');
86			$uses = [];
87			break;
88
89			case T_CLASS:
90			case T_INTERFACE:
91			case T_TRAIT:
92			if ($name = self::fetch($tokens, T_STRING)) {
93			$class = $namespace.$name;
94			$classLevel = $level + 1;
95			$res[$class] = $uses;
96			if ($class === $forClass) {
97			return $res;
98			}
99			}
100			break;
101
102			case T_USE:
103			while (! $class && ($name = self::fetch($tokens, [T_STRING, T_NS_SEPARATOR]))) {
			0 ignored issues – show Bug Best Practice introduced 2019-10-04 10:20 UTC by Report Bug Copy Issue Report The expression `$class` of type `string\|null` is loosely compared to `false`; this is ambiguous if the string can be empty. You might want to explicitly use `=== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `string` values, the empty string `''` is a special case, in particular the following results might be unexpected: '' == false // true '' == null // true 'ab' == false // false 'ab' == null // false // It is often better to use strict comparison '' === false // false '' === null // false Loading history...
104			$name = ltrim($name, '\\');
105			if (self::fetch($tokens, '{')) {
			0 ignored issues – show Bug Best Practice introduced 2019-10-04 10:20 UTC by Report Bug Copy Issue Report The expression `self::fetch($tokens, '{')` of type `string\|null` is loosely compared to `true`; this is ambiguous if the string can be empty. You might want to explicitly use `!== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `string` values, the empty string `''` is a special case, in particular the following results might be unexpected: '' == false // true '' == null // true 'ab' == false // false 'ab' == null // false // It is often better to use strict comparison '' === false // false '' === null // false Loading history...
106			while ($suffix = self::fetch($tokens, [T_STRING, T_NS_SEPARATOR])) {
107			/* @noinspection NotOptimalIfConditionsInspection */
108			if (self::fetch($tokens, T_AS)) {
			0 ignored issues – show Bug Best Practice introduced 2019-10-04 10:20 UTC by Report Bug Copy Issue Report The expression `self::fetch($tokens, T_AS)` of type `string\|null` is loosely compared to `true`; this is ambiguous if the string can be empty. You might want to explicitly use `!== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `string` values, the empty string `''` is a special case, in particular the following results might be unexpected: '' == false // true '' == null // true 'ab' == false // false 'ab' == null // false // It is often better to use strict comparison '' === false // false '' === null // false Loading history...
109			$uses[self::fetch($tokens, T_STRING)] = $name.$suffix;
110			} else {
111			$tmp = explode('\\', $suffix);
112			$uses[end($tmp)] = $name.$suffix;
113			}
114			if (! self::fetch($tokens, ',')) {
			0 ignored issues – show Bug Best Practice introduced 2019-10-04 10:20 UTC by Report Bug Copy Issue Report The expression `self::fetch($tokens, ',')` of type `string\|null` is loosely compared to `false`; this is ambiguous if the string can be empty. You might want to explicitly use `=== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `string` values, the empty string `''` is a special case, in particular the following results might be unexpected: '' == false // true '' == null // true 'ab' == false // false 'ab' == null // false // It is often better to use strict comparison '' === false // false '' === null // false Loading history...
115			break;
116			}
117			}
118
119			} elseif (self::fetch($tokens, T_AS)) {
			0 ignored issues – show Bug Best Practice introduced 2019-10-04 10:20 UTC by Report Bug Copy Issue Report The expression `self::fetch($tokens, T_AS)` of type `string\|null` is loosely compared to `true`; this is ambiguous if the string can be empty. You might want to explicitly use `!== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `string` values, the empty string `''` is a special case, in particular the following results might be unexpected: '' == false // true '' == null // true 'ab' == false // false 'ab' == null // false // It is often better to use strict comparison '' === false // false '' === null // false Loading history...
120			$uses[self::fetch($tokens, T_STRING)] = $name;
121
122			} else {
123			$tmp = explode('\\', $name);
124			$uses[end($tmp)] = $name;
125			}
126			if (! self::fetch($tokens, ',')) {
			0 ignored issues – show Bug Best Practice introduced 2019-10-04 10:20 UTC by Report Bug Copy Issue Report The expression `self::fetch($tokens, ',')` of type `string\|null` is loosely compared to `false`; this is ambiguous if the string can be empty. You might want to explicitly use `=== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `string` values, the empty string `''` is a special case, in particular the following results might be unexpected: '' == false // true '' == null // true 'ab' == false // false 'ab' == null // false // It is often better to use strict comparison '' === false // false '' === null // false Loading history...
127			break;
128			}
129			}
130			break;
131
132			case T_CURLY_OPEN:
133			case T_DOLLAR_OPEN_CURLY_BRACES:
134			case '{':
135			$level++;
136			break;
137
138			case '}':
139			if ($level === $classLevel) {
140			$class = $classLevel = null;
141			}
142			$level--;
143			}
144			}
145
146			return $res;
147			}
148
149			private static function fetch(&$tokens, $take): ?string
150			{
151			$res = null;
152			while ($token = current($tokens)) {
153			[$token, $s] = is_array($token) ? $token : [$token, $token];
			0 ignored issues – show Bug introduced 2019-10-04 10:20 UTC by Report Bug Copy Issue Report The variable `$s` 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...
154			if (in_array($token, (array) $take, true)) {
155			$res .= $s;
156			} elseif (! in_array($token, [T_DOC_COMMENT, T_WHITESPACE, T_COMMENT], true)) {
157			break;
158			}
159			next($tokens);
160			}
161			return $res;
162			}
163			}
164

spatie / data-transfer-object

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Pull Request — master (#67)

ReflectionUtils::parseUsesAndAliases() D

Complexity

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Duplication

Importance

How to fix Long Method Complexity

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