StaticMethodCollector::__construct() - Code Metrics - Inspection of "php-cs-fixer" - SignpostMarv/daft-interface-collector - Measure and Improve Code Quality continuously with Scrutinizer

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by SignpostMarv

created 2019-01-14 20:12 UTC

StaticMethodCollector::__construct() A

↳ Parent: StaticMethodCollector

Complexity

Conditions	2
Paths	2

Size

Total Lines	21
Code Lines	7

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	8
CRAP Score	2

Importance

Changes

Metric	Value
cc	2
eloc	7
nc	2
nop	3
dl	0
loc	21
ccs	8
cts	8
cp	1
crap	2
rs	10
c	0
b	0
f	0

<?php

declare(strict_types=1);
/**
* @author SignpostMarv
*/

namespace SignpostMarv\DaftInterfaceCollector;

use Closure;
use Generator;
use ReflectionClass;
use ReflectionMethod;
use ReflectionNamedType;
use ReflectionType;
use Traversable;

class StaticMethodCollector
{
    const DEFAULT_INT_ARRAY_FILTER_FLAG = 0;

    const DEFAULT_BOOL_AUTORESET = true;

    const INT_FILTER_NON_EMPTY_ARRAY = 0;

    const EXPECTED_NUMBER_OF_REQUIRED_PARAMETERS = 0;

    /**
    * @var array<int, string>
    */
    protected $processedSources = [];

    /**
    * @var string[]
    */
    protected $alreadyYielded = [];

    /**
    * @var bool
    */
    protected $autoReset;

    /**
    * @var array<string, array<string, array<int, string>>>
    */
    private $staticMethods = [];

    /**
    * @var string[]
    */
    private $interfaces = [];

    public function __construct(
        array $staticMethods,
        array $interfaces,
        bool $autoReset = self::DEFAULT_BOOL_AUTORESET
    ) {
        $filteredMethods = [];

        foreach ($this->FilterArrayOfInterfaceOffsets($staticMethods) as $interface => $methods) {
            $filteredMethods[$interface] = $this->FilterMethods($interface, $methods);
        }

        $this->staticMethods = $this->FilterNonZeroArray($filteredMethods);

        /**
        * @var string[]
        */
        $filteredInterfaces = $this->FilterArrayOfInterfacesOrClasses($interfaces);

        $this->interfaces = $filteredInterfaces;

        $this->autoReset = $autoReset;
    }

    public function Collect(string ...$implementations) : Generator
    {
        if ($this->autoReset) {
            $this->processedSources = [];
            $this->alreadyYielded = [];
        }

        yield from $this->CollectInterfaces(...$implementations);
    }

    protected function CollectInterfaces(string ...$implementations) : Generator
    {
        foreach (
            array_filter(
                $implementations,
                function (string $implementation) : bool {
                    return
                        ! static::IsStringInArray($implementation, $this->processedSources);
                }
            ) as $implementation
        ) {
            $this->processedSources[] = $implementation;
            yield from $this->CollectInterfacesFromImplementationCheckInterfaces($implementation);
            yield from $this->CollectInterfacesFromImplementation($implementation);
        }
    }

    final protected function CollectInterfacesFromImplementationCheckInterfaces(
        string $implementation
    ) : Generator {
        $checking = array_filter(
            $this->interfaces,
            function (string $interface) use ($implementation) : bool {
                return static::IsStringA($implementation, $interface);
            }
        );

        if (
            count($checking) > self::INT_FILTER_NON_EMPTY_ARRAY &&
            ! static::IsStringInArray($implementation, $this->alreadyYielded)
        ) {
            yield $implementation;
            $this->alreadyYielded[] = $implementation;
        }
    }

    final protected function CollectInterfacesFromImplementation(string $implementation) : Generator
    {
        $interfaces = array_keys($this->staticMethods);

        foreach ($this->FilterIsA($implementation, $interfaces) as $interface) {
            foreach ($this->staticMethods[$interface] as $method => $types) {
                yield from $this->CollectInterfacesFromImplementationTypes(
                    $implementation,
                    $method,
                    $types
                );
            }
        }
    }

    /**
    * @param array<int, string> $types
    */
    final protected function CollectInterfacesFromImplementationTypes(
        string $implementation,
        string $method,
        array $types
    ) : Generator {
        /**
        * @var iterable<string>
        */
        $methodResult = $implementation::$method();

        foreach ($methodResult as $result) {
            if (static::IsStringInArray($result, $this->alreadyYielded)) {
                continue;
            }

            foreach ($this->FilterIsA($result, $types) as $type) {
                yield $result;
                $this->alreadyYielded[] = $result;
            }

            yield from $this->CollectInterfaces($result);
        }
    }

    /**
    * @param array<int, string> $interfaces
    *
    * @return array<int, string>
    */
    final protected function FilterIsA(string $implementation, array $interfaces) : array
    {
        /**
        * @var array<int, string>
        */
        $out = array_filter($interfaces, function (string $interface) use ($implementation) : bool {
            return static::IsStringA($implementation, $interface);
        });

        return $out;
    }

    /**
    * @return string[]|array<string, mixed>
    */
    final protected function FilterArrayOfInterfaces(
        array $interfaces,
        int $flag = self::DEFAULT_INT_ARRAY_FILTER_FLAG
    ) : array {
        $strings = array_filter($interfaces, 'is_string', $flag);

        return array_filter($strings, 'interface_exists', $flag);
    }

    /**
    * @return string[]
    */
    final protected function FilterArrayOfInterfacesOrClasses(array $interfaces) : array
    {
        /**
        * @var string[]
        */
        $strings = array_filter($interfaces, 'is_string');

        return array_filter($strings, function (string $maybe) : bool {
            return interface_exists($maybe) || class_exists($maybe);
        });
    }

    /**
    * @return array<string, array>
    */
    final protected function FilterArrayOfInterfaceOffsets(array $interfaces) : array
    {
        /**
        * @var array<string, array>
        */
        $strings = $this->FilterArrayOfInterfaces($interfaces, ARRAY_FILTER_USE_KEY);

        return array_filter($strings, 'is_array');
    }

    final protected function MakeMethodFilter(string $interface) : Closure
    {
        return function (string $maybe) use ($interface) : bool {
            $ref = new ReflectionClass($interface);

            return
                $ref->hasMethod($maybe) &&
                $this->FilterReflectionMethod($ref->getMethod($maybe));
        };
    }

    final protected function FilterReflectionMethod(ReflectionMethod $refMethod) : bool
    {
        return
            $refMethod->isStatic() &&
            $refMethod->isPublic() &&
            self::EXPECTED_NUMBER_OF_REQUIRED_PARAMETERS === $refMethod->getNumberOfRequiredParameters() &&
            $this->FilterReflectionReturnType($refMethod->getReturnType());
    }

    final protected function FilterReflectionReturnType(? ReflectionType $refReturn) : bool
    {
        $refReturnName = ($refReturn instanceof ReflectionNamedType) ? $refReturn->getName() : '';

        return 'array' === $refReturnName || static::IsStringA($refReturnName, Traversable::class);
    }

    /**
    * @return array<string, string[]>
    */
    final protected function FilterMethods(string $interface, array $methods) : array
    {
        /**
        * @var array<string, string[]>
        */
        $filteredMethods = $this->FilterNonZeroArray(array_map(
            [$this, 'FilterArrayOfInterfacesOrClasses'],
            array_filter(
                array_filter($methods, 'is_string', ARRAY_FILTER_USE_KEY),
                $this->MakeMethodFilter($interface),
                ARRAY_FILTER_USE_KEY
            )
        ));

        return $filteredMethods;
    }

    /**
    * @return array<string, array<string, array<int, string>>>
    */
    final protected function FilterNonZeroArray(array $in) : array
    {
        /**
        * @var array<string, array<string, array<int, string>>>
        */
        $out = array_filter(
            $in,
            function (array $val) : bool {
                return count($val) > self::INT_FILTER_NON_EMPTY_ARRAY;
            }
        );

        return $out;
    }

    protected static function IsStringInArray(string $maybe, array $array) : bool
    {
        return in_array($maybe, $array, true);
    }

    protected static function IsStringA(string $maybe, string $thing) : bool
    {
        return is_a($maybe, $thing, true);
    }
}


1		<?php
2
3		declare(strict_types=1);
4		/**
5		* @author SignpostMarv
6		*/
7
8		namespace SignpostMarv\DaftInterfaceCollector;
9
10		use Closure;
11		use Generator;
12		use ReflectionClass;
13		use ReflectionMethod;
14		use ReflectionNamedType;
15		use ReflectionType;
16		use Traversable;
17
18		class StaticMethodCollector
19		{
20		const DEFAULT_INT_ARRAY_FILTER_FLAG = 0;
21
22		const DEFAULT_BOOL_AUTORESET = true;
23
24		const INT_FILTER_NON_EMPTY_ARRAY = 0;
25
26		const EXPECTED_NUMBER_OF_REQUIRED_PARAMETERS = 0;
27
28		/**
29		* @var array<int, string>
30		*/
31		protected $processedSources = [];
32
33		/**
34		* @var string[]
35		*/
36		protected $alreadyYielded = [];
37
38		/**
39		* @var bool
40		*/
41		protected $autoReset;
42
43		/**
44		* @var array<string, array<string, array<int, string>>>
45		*/
46		private $staticMethods = [];
47
48		/**
49		* @var string[]
50		*/
51		private $interfaces = [];
52
53	8	public function __construct(
54		array $staticMethods,
55		array $interfaces,
56		bool $autoReset = self::DEFAULT_BOOL_AUTORESET
57		) {
58	8	$filteredMethods = [];
59
60	8	foreach ($this->FilterArrayOfInterfaceOffsets($staticMethods) as $interface => $methods) {
61	8	$filteredMethods[$interface] = $this->FilterMethods($interface, $methods);
62		}
63
64	8	$this->staticMethods = $this->FilterNonZeroArray($filteredMethods);
65
66		/**
67		* @var string[]
68		*/
69	8	$filteredInterfaces = $this->FilterArrayOfInterfacesOrClasses($interfaces);
70
71	8	$this->interfaces = $filteredInterfaces;
72
73	8	$this->autoReset = $autoReset;
74	8	}
75
76	4	public function Collect(string ...$implementations) : Generator
77		{
78	4	if ($this->autoReset) {
79	2	$this->processedSources = [];
80	2	$this->alreadyYielded = [];
81		}
82
83	4	yield from $this->CollectInterfaces(...$implementations);
84	4	}
85
86	8	protected function CollectInterfaces(string ...$implementations) : Generator
87		{
88		foreach (
89	8	array_filter(
90	8	$implementations,
91		function (string $implementation) : bool {
92		return
93	8	! static::IsStringInArray($implementation, $this->processedSources);
94	8	}
95		) as $implementation
96		) {
97	8	$this->processedSources[] = $implementation;
98	8	yield from $this->CollectInterfacesFromImplementationCheckInterfaces($implementation);
99	8	yield from $this->CollectInterfacesFromImplementation($implementation);
100		}
101	8	}
102
103	8	final protected function CollectInterfacesFromImplementationCheckInterfaces(
104		string $implementation
105		) : Generator {
106	8	$checking = array_filter(
107	8	$this->interfaces,
108		function (string $interface) use ($implementation) : bool {
109	8	return static::IsStringA($implementation, $interface);
110	8	}
111		);
112
113		if (
114	8	count($checking) > self::INT_FILTER_NON_EMPTY_ARRAY &&
115	8	! static::IsStringInArray($implementation, $this->alreadyYielded)
116		) {
117		yield $implementation;
118		$this->alreadyYielded[] = $implementation;
119		}
120	8	}
121
122	8	final protected function CollectInterfacesFromImplementation(string $implementation) : Generator
123		{
124	8	$interfaces = array_keys($this->staticMethods);
125
126	8	foreach ($this->FilterIsA($implementation, $interfaces) as $interface) {
127	8	foreach ($this->staticMethods[$interface] as $method => $types) {
128	8	yield from $this->CollectInterfacesFromImplementationTypes(
129	8	$implementation,
130	8	$method,
131	8	$types
132		);
133		}
134		}
135	8	}
136
137		/**
138		* @param array<int, string> $types
139		*/
140	8	final protected function CollectInterfacesFromImplementationTypes(
141		string $implementation,
142		string $method,
143		array $types
144		) : Generator {
145		/**
146		* @var iterable<string>
147		*/
148	8	$methodResult = $implementation::$method();
149
150	8	foreach ($methodResult as $result) {
151	8	if (static::IsStringInArray($result, $this->alreadyYielded)) {
152	2	continue;
153		}
154
155	8	foreach ($this->FilterIsA($result, $types) as $type) {
156	8	yield $result;
157	8	$this->alreadyYielded[] = $result;
158		}
159
160	8	yield from $this->CollectInterfaces($result);
161		}
162	8	}
163
164		/**
165		* @param array<int, string> $interfaces
166		*
167		* @return array<int, string>
168		*/
169	8	final protected function FilterIsA(string $implementation, array $interfaces) : array
170		{
171		/**
172		* @var array<int, string>
173		*/
174		$out = array_filter($interfaces, function (string $interface) use ($implementation) : bool {
175	8	return static::IsStringA($implementation, $interface);
176	8	});
177
178	8	return $out;
179		}
180
181		/**
182		* @return string[]\|array<string, mixed>
183		*/
184	8	final protected function FilterArrayOfInterfaces(
185		array $interfaces,
186		int $flag = self::DEFAULT_INT_ARRAY_FILTER_FLAG
187		) : array {
188	8	$strings = array_filter($interfaces, 'is_string', $flag);
189
190	8	return array_filter($strings, 'interface_exists', $flag);
191		}
192
193		/**
194		* @return string[]
195		*/
196	8	final protected function FilterArrayOfInterfacesOrClasses(array $interfaces) : array
197		{
198		/**
199		* @var string[]
200		*/
201	8	$strings = array_filter($interfaces, 'is_string');
202
203		return array_filter($strings, function (string $maybe) : bool {
204	8	return interface_exists($maybe) \|\| class_exists($maybe);
205	8	});
206		}
207
208		/**
209		* @return array<string, array>
210		*/
211	8	final protected function FilterArrayOfInterfaceOffsets(array $interfaces) : array
212		{
213		/**
214		* @var array<string, array>
215		*/
216	8	$strings = $this->FilterArrayOfInterfaces($interfaces, ARRAY_FILTER_USE_KEY);
217
218	8	return array_filter($strings, 'is_array');
219		}
220
221	8	final protected function MakeMethodFilter(string $interface) : Closure
222		{
223		return function (string $maybe) use ($interface) : bool {
224	8	$ref = new ReflectionClass($interface);
225
226		return
227	8	$ref->hasMethod($maybe) &&
228	8	$this->FilterReflectionMethod($ref->getMethod($maybe));
229	8	};
230		}
231
232	8	final protected function FilterReflectionMethod(ReflectionMethod $refMethod) : bool
233		{
234		return
235	8	$refMethod->isStatic() &&
236	8	$refMethod->isPublic() &&
237	8	self::EXPECTED_NUMBER_OF_REQUIRED_PARAMETERS === $refMethod->getNumberOfRequiredParameters() &&
238	8	$this->FilterReflectionReturnType($refMethod->getReturnType());
239		}
240
241	8	final protected function FilterReflectionReturnType(? ReflectionType $refReturn) : bool
242		{
243	8	$refReturnName = ($refReturn instanceof ReflectionNamedType) ? $refReturn->getName() : '';
244
245	8	return 'array' === $refReturnName \|\| static::IsStringA($refReturnName, Traversable::class);
246		}
247
248		/**
249		* @return array<string, string[]>
250		*/
251	8	final protected function FilterMethods(string $interface, array $methods) : array
252		{
253		/**
254		* @var array<string, string[]>
255		*/
256	8	$filteredMethods = $this->FilterNonZeroArray(array_map(
257	8	[$this, 'FilterArrayOfInterfacesOrClasses'],
258	8	array_filter(
259	8	array_filter($methods, 'is_string', ARRAY_FILTER_USE_KEY),
260	8	$this->MakeMethodFilter($interface),
261	8	ARRAY_FILTER_USE_KEY
262		)
263		));
264
265	8	return $filteredMethods;
266		}
267
268		/**
269		* @return array<string, array<string, array<int, string>>>
270		*/
271	8	final protected function FilterNonZeroArray(array $in) : array
272		{
273		/**
274		* @var array<string, array<string, array<int, string>>>
275		*/
276	8	$out = array_filter(
277	8	$in,
278		function (array $val) : bool {
279	8	return count($val) > self::INT_FILTER_NON_EMPTY_ARRAY;
280	8	}
281		);
282
283	8	return $out;
284		}
285
286	8	protected static function IsStringInArray(string $maybe, array $array) : bool
287		{
288	8	return in_array($maybe, $array, true);
289		}
290
291	8	protected static function IsStringA(string $maybe, string $thing) : bool
292		{
293	8	return is_a($maybe, $thing, true);
294		}
295		}
296

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StaticMethodCollector::__construct() A

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