HandlersList::accepts() - Code Metrics - FlyingDR/handlers-list - Measure and Improve Code Quality continuously with Scrutinizer

HandlersList::accepts() B
last analyzed 2021-02-27 12:06 UTC

↳ Parent: HandlersList

Complexity

Conditions	7
Paths	6

Size

Total Lines	18
Code Lines	10

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	8
CRAP Score	7.392

Importance

Changes

Metric	Value
eloc	10
c	0
b	0
f	0
dl	0
loc	18
ccs	8
cts	10
cp	0.8
rs	8.8333
cc	7
nc	6
nop	1
crap	7.392

<?php

declare(strict_types=1);

namespace Flying\HandlersList;

use Flying\HandlersList\Exception\InvalidHandlerConstraintException;
use Flying\HandlersList\Exception\InvalidHandlerException;

class HandlersList implements HandlersListInterface
{
    /**
     * @var object[]
     */
    private array $handlers;
    private ?string $constraint = null;

    /**
     * @param iterable<object> $handlers
     * @throws InvalidHandlerException
     */
    public function __construct(iterable $handlers = [], ?string $constraint = null)
    {
        $this->setConstraint($constraint);
        $this->store($handlers);
        $this->update();
    }

    public function accepts($class): bool
    {
        if (\is_object($class)) {
            return $this->constraint ? \is_a($class, $this->constraint, true) : true;
        }

        if (\is_string($class) && \class_exists($class)) {
            if ($this->constraint === null) {
                return true;
            }
            try {
                return (new \ReflectionClass($class))->implementsInterface($this->constraint);
            } catch (\ReflectionException $e) {
                return false;
            }
        }

        return false;
    }

    public function isEmpty(): bool
    {
        return empty($this->handlers);
    }

    public function contains(object $handler): bool
    {
        return \in_array($handler, $this->handlers, true);
    }

    /**
     * @return object[]
     */
    public function filter(callable $test): array
    {
        return array_values(array_filter($this->handlers, $test));
    }

    /**
     * Find handler by reducing list of available handlers using given test function
     *
     * @param callable $test Test function should accept object as single argument and return boolean
     * @return object|null
     */
    public function find(callable $test): ?object
    {
        return array_reduce(
            $this->handlers,
            fn(?object $found, object $current) => $found ?? ($test($current) ? $current : null)
        );
    }

    public function set(iterable $handlers): self
    {
        $this->store($handlers);
        $this->update();
        return $this;
    }

    public function add(object $handler): self
    {
        if (!$this->contains($handler)) {
            $this->handlers[] = $this->validate($handler);
            $this->update();
        }
        return $this;
    }

    public function remove(object $handler): self
    {
        $this->handlers = array_filter($this->handlers, fn(object $h) => $h !== $handler);
        $this->update();
        return $this;
    }

    public function clear(): self
    {
        $this->handlers = [];
        $this->update();
        return $this;
    }

    public function getConstraint(): ?string
    {
        return $this->constraint;
    }

    public function toArray(): array
    {
        return $this->handlers;
    }

    public function getIterator(): \Iterator
    {
        return new \ArrayIterator($this->handlers);
    }

    public function count(): int
    {
        return \count($this->handlers);
    }

    protected function setConstraint(?string $constraint): void
    {
        if (\is_string($constraint)) {
            try {
                new \ReflectionClass($constraint);
            } catch (\ReflectionException $e) {
                throw new InvalidHandlerConstraintException(sprintf('Given handler class constraint "%s" does not exists', $constraint));
            }
        }

        $this->constraint = $constraint;
    }

    protected function store(iterable $handlers): void
    {
        /** @noinspection PhpParamsInspection */
        $this->handlers = array_map(function($h) {
            return $this->validate($h);
        }, is_array($handlers) ? $handlers : iterator_to_array($handlers, false));
    }

    /**
     * @param mixed $handler
     * @return object
     * @throws InvalidHandlerException
     */
    protected function validate($handler): object
    {
        if (!is_object($handler)) {
            throw new InvalidHandlerException(sprintf('Handler should be an object, "%s" given instead', gettype($handler)));
        }

        if ($this->constraint === null) {
            return $handler;
        }

        if (!is_a($handler, $this->constraint)) {
            throw new InvalidHandlerException(sprintf('Handler "%s" should be instance of "%s"', get_class($handler), $this->constraint));
        }

        return $handler;
    }

    /**
     * Update handlers list and related parameters after modification
     */
    protected function update(): void
    {
        usort($this->handlers, static function($a, $b) {
            $ap = $a instanceof PrioritizedHandlerInterface ? $a->getHandlerPriority() : 0;
            $bp = $b instanceof PrioritizedHandlerInterface ? $b->getHandlerPriority() : 0;
            if ($ap > $bp) {
                return -1;
            }
            if ($ap < $bp) {
                return 1;
            }
            return 0;
        });
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace Flying\HandlersList;
6
7		use Flying\HandlersList\Exception\InvalidHandlerConstraintException;
8		use Flying\HandlersList\Exception\InvalidHandlerException;
9
10		class HandlersList implements HandlersListInterface
11		{
12		/**
13		* @var object[]
14		*/
15		private array $handlers;
16		private ?string $constraint = null;
17
18		/**
19		* @param iterable<object> $handlers
20		* @throws InvalidHandlerException
21		*/
22	64	public function __construct(iterable $handlers = [], ?string $constraint = null)
23		{
24	64	$this->setConstraint($constraint);
25	62	$this->store($handlers);
26	56	$this->update();
27	56	}
28
29	30	public function accepts($class): bool
30		{
31	30	if (\is_object($class)) {
32	10	return $this->constraint ? \is_a($class, $this->constraint, true) : true;
33		}
34
35	20	if (\is_string($class) && \class_exists($class)) {
36	10	if ($this->constraint === null) {
37	4	return true;
38		}
39		try {
40	6	return (new \ReflectionClass($class))->implementsInterface($this->constraint);
41		} catch (\ReflectionException $e) {
42		return false;
43		}
44		}
45
46	10	return false;
47		}
48
49	4	public function isEmpty(): bool
50		{
51	4	return empty($this->handlers);
52		}
53
54	9	public function contains(object $handler): bool
55		{
56	9	return \in_array($handler, $this->handlers, true);
57		}
58
59		/**
60		* @return object[]
61		*/
62	2	public function filter(callable $test): array
63		{
64	2	return array_values(array_filter($this->handlers, $test));
65		}
66
67		/**
68		* Find handler by reducing list of available handlers using given test function
69		*
70		* @param callable $test Test function should accept object as single argument and return boolean
71		* @return object\|null
72		*/
73	2	public function find(callable $test): ?object
74		{
75	2	return array_reduce(
76	2	$this->handlers,
77	2	fn(?object $found, object $current) => $found ?? ($test($current) ? $current : null)
78	2	);
79		}
80
81	3	public function set(iterable $handlers): self
82		{
83	3	$this->store($handlers);
84	3	$this->update();
85	3	return $this;
86		}
87
88	5	public function add(object $handler): self
89		{
90	5	if (!$this->contains($handler)) {
91	5	$this->handlers[] = $this->validate($handler);
92	5	$this->update();
93		}
94	5	return $this;
95		}
96
97	3	public function remove(object $handler): self
98		{
99	3	$this->handlers = array_filter($this->handlers, fn(object $h) => $h !== $handler);
100	3	$this->update();
101	3	return $this;
102		}
103
104	3	public function clear(): self
105		{
106	3	$this->handlers = [];
107	3	$this->update();
108	3	return $this;
109		}
110
111	6	public function getConstraint(): ?string
112		{
113	6	return $this->constraint;
114		}
115
116	16	public function toArray(): array
117		{
118	16	return $this->handlers;
119		}
120
121	4	public function getIterator(): \Iterator
122		{
123	4	return new \ArrayIterator($this->handlers);
124		}
125
126	12	public function count(): int
127		{
128	12	return \count($this->handlers);
129		}
130
131	64	protected function setConstraint(?string $constraint): void
132		{
133	64	if (\is_string($constraint)) {
134		try {
135	30	new \ReflectionClass($constraint);
136	2	} catch (\ReflectionException $e) {
137	2	throw new InvalidHandlerConstraintException(sprintf('Given handler class constraint "%s" does not exists', $constraint));
138		}
139		}
140
141	62	$this->constraint = $constraint;
142	62	}
143
144	62	protected function store(iterable $handlers): void
145		{
146		/** @noinspection PhpParamsInspection */
147	62	$this->handlers = array_map(function($h) {
148	27	return $this->validate($h);
149	62	}, is_array($handlers) ? $handlers : iterator_to_array($handlers, false));
150	56	}
151
152		/**
153		* @param mixed $handler
154		* @return object
155		* @throws InvalidHandlerException
156		*/
157	30	protected function validate($handler): object
158		{
159	30	if (!is_object($handler)) {
160	2	throw new InvalidHandlerException(sprintf('Handler should be an object, "%s" given instead', gettype($handler)));
161		}
162
163	28	if ($this->constraint === null) {
164	16	return $handler;
165		}
166
167	12	if (!is_a($handler, $this->constraint)) {
168	4	throw new InvalidHandlerException(sprintf('Handler "%s" should be instance of "%s"', get_class($handler), $this->constraint));
169		}
170
171	10	return $handler;
172		}
173
174		/**
175		* Update handlers list and related parameters after modification
176		*/
177	56	protected function update(): void
178		{
179	56	usort($this->handlers, static function($a, $b) {
180	16	$ap = $a instanceof PrioritizedHandlerInterface ? $a->getHandlerPriority() : 0;
181	16	$bp = $b instanceof PrioritizedHandlerInterface ? $b->getHandlerPriority() : 0;
182	16	if ($ap > $bp) {
183		return -1;
184		}
185	16	if ($ap < $bp) {
186	2	return 1;
187		}
188	14	return 0;
189	56	});
190	56	}
191		}
192

FlyingDR / handlers-list

HandlersList::accepts() B last analyzed 2021-02-27 12:06 UTC

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HandlersList::accepts() B
last analyzed 2021-02-27 12:06 UTC