StaticMethodCollector::CollectInterfacesFromImplementation() - Code Metrics - Inspection of "adjusting indentation" - SignpostMarv/daft-interface-collector - Measure and Improve Code Quality continuously with Scrutinizer

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by SignpostMarv

created 2018-07-03 21:59 UTC

CollectInterfacesFromImplementation() A

↳ Parent: StaticMethodCollector

Complexity

Conditions	3
Paths	3

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	8
CRAP Score	3

Importance

Changes

Metric	Value
cc	3
nc	3
nop	1
dl	0
loc	12
ccs	8
cts	8
cp	1
crap	3
rs	9.8666
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
{
    /**
    * @var array<string, array<string, string[]>>
    */
    private $staticMethods = [];

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

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

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

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

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

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

        /**
        * @var array<string, array<string, string[]>> $filteredMethods
        */
        $filteredMethods = $this->FilterNonZeroArray($filteredMethods);

        $this->staticMethods = $filteredMethods;

        /**
        * @var string[] $filteredInterfaces
        */
        $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 $implementation) : bool {
                    return
                        class_exists($implementation) &&
                        ! in_array($implementation, $this->processedSources, true);
                }
            ) as $implementation
        ) {
            $this->processedSources[] = $implementation;

            foreach ($this->interfaces as $interface) {
                if (
                    ! in_array($implementation, $this->alreadyYielded, true) &&
                    is_a($implementation, $interface, true)
                ) {
                    yield $implementation;
                    $this->alreadyYielded[] = $implementation;
                    break;
                }
            }

            yield from $this->CollectInterfacesFromImplementation($implementation);
        }
    }

    private function CollectInterfacesFromImplementation(string $implementation) : Generator
    {
        $interfaces = array_keys($this->staticMethods);
        /**
        * @var string $interface
        */
        foreach ($this->FilterIsA($implementation, $interfaces) as $interface) {
            foreach ($this->staticMethods[$interface] as $method => $types) {
                yield from $this->CollectInterfacesFromImplementationTypes(
                    $implementation,
                    $method,
                    $types
                );
            }
        }
    }

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

        foreach ($methodResult as $result) {
            if (in_array($result, $this->alreadyYielded, true)) {
                continue;
            }
            /**
            * @var string $type
            */
            foreach ($this->FilterIsA($result, $types) as $type) {
                yield $result;
                $this->alreadyYielded[] = $result;
            }

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

    private function FilterIsA(string $implementation, array $interfaces) : array
    {
        return array_filter($interfaces, function (string $interface) use ($implementation) : bool {
            return is_a($implementation, $interface, true);
        });
    }

    /**
    * @return string[]|array<string, mixed>
    */
    private function FilterArrayOfInterfaces(array $interfaces, int $flag = 0) : array
    {
        $strings = array_filter($interfaces, 'is_string', $flag);

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

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

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

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

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

    private 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));
        };
    }

    private function FilterReflectionMethod(ReflectionMethod $refMethod) : bool
    {
        return
            $refMethod->isStatic() &&
            $refMethod->isPublic() &&
            0 === $refMethod->getNumberOfRequiredParameters() &&
            $this->FilterReflectionReturnType($refMethod->getReturnType());
    }

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

        return 'array' === $refReturnName || is_a($refReturnName, Traversable::class, true);
    }

    /**
    * @return array<string, string[]>
    */
    private 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;
    }

    /**
    * @var array[]
    */
    private function FilterNonZeroArray(array $in) : array
    {
        return array_filter(
            $in,
            function (array $val) : bool {
                return count($val) > 0;
            }
        );
    }
}


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

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CollectInterfacesFromImplementation() A

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