Factory::getDefaultInstance() - Code Metrics - Inspection of "Make a better use of the Factory class" - Respect/Validation - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#899)

by Henrique

created 2018-01-14 15:26 UTC

Factory::getDefaultInstance() A

↳ Parent: Factory

Complexity

Conditions	2
Paths	2

Size

Total Lines	7
Code Lines	3

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	3
CRAP Score	2.0625

Importance

Changes

Metric	Value
cc	2
eloc	3
nc	2
nop	0
dl	0
loc	7
ccs	3
cts	4
cp	0.75
crap	2.0625
rs	9.4285
c	0
b	0
f	0

<?php

/*
 * This file is part of Respect/Validation.
 *
 * (c) Alexandre Gomes Gaigalas <[email protected]>
 *
 * For the full copyright and license information, please view the "LICENSE.md"
 * file that was distributed with this source code.
 */

declare(strict_types=1);

namespace Respect\Validation;

use function array_map;
use function array_merge;
use function array_unique;
use function class_exists;
use function lcfirst;
use function Respect\Stringifier\stringify;

use ReflectionClass;
use ReflectionObject;
use Respect\Validation\Exceptions\ComponentException;
use Respect\Validation\Exceptions\InvalidClassException;
use Respect\Validation\Exceptions\ValidationException;

/**
 * Factory of objects.
 *
 * @author Henrique Moody <[email protected]>
 *
 * @since 0.8.0
 */
final class Factory
{
    private const DEFAULT_RULES_NAMESPACES = [
        'Respect\\Validation\\Rules',
        'Respect\\Validation\\Rules\\Locale',
        'Respect\\Validation\\Rules\\SubdivisionCode',
    ];

    private const DEFAULT_EXCEPTIONS_NAMESPACES = [
        'Respect\\Validation\\Exceptions',
        'Respect\\Validation\\Exceptions\\Locale',
        'Respect\\Validation\\Exceptions\\SubdivisionCode',
    ];

    /**
     * Default instance of the Factory.
     *
     * @var Factory
     */
    private static $defaultInstance;

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

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

    /**
     * Initializes the factory with the defined namespaces.
     *
     * If the default namespace is not in the array, it will be add to the end
     * of the array.
     *
     * @param string[] $rulesNamespaces
     * @param string[] $exceptionsNamespaces
     */
    public function __construct(array $rulesNamespaces, array $exceptionsNamespaces)
    {
        $this->rulesNamespaces = $this->filterNamespaces($rulesNamespaces, self::DEFAULT_RULES_NAMESPACES);
        $this->exceptionsNamespaces = $this->filterNamespaces($exceptionsNamespaces, self::DEFAULT_EXCEPTIONS_NAMESPACES);
    }

    /**
     * Define the default instance of the Factory.
     *
     * @param Factory $defaultInstance
     */
    public static function setDefaultInstance(self $defaultInstance): void
    {
        self::$defaultInstance = $defaultInstance;
    }

    /**
     * Returns the default instance of the Factory.
     *
     * @return Factory
     */
    public static function getDefaultInstance(): self
    {
        if (null === self::$defaultInstance) {
            self::$defaultInstance = new self(self::DEFAULT_RULES_NAMESPACES, self::DEFAULT_EXCEPTIONS_NAMESPACES);
        }

        return self::$defaultInstance;
    }

    /**
     * Creates a rule.
     *
     * @param string $ruleName
     * @param array $arguments
     *
     * @throws ComponentException
     *
     * @return Validatable
     */
    public function rule(string $ruleName, array $arguments = []): Validatable
    {
        foreach ($this->rulesNamespaces as $namespace) {
            $className = sprintf('%s\\%s', $namespace, ucfirst($ruleName));
            if (!class_exists($className)) {
                continue;
            }

            return $this->createReflectionClass($className, Validatable::class)->newInstanceArgs($arguments);
        }

        throw new ComponentException(sprintf('"%s" is not a valid rule name', $ruleName));
    }

    /**
     * Creates an exception.
     *
     *
     * @param Validatable $validatable
     * @param mixed $input
     * @param array $extraParams
     *
     * @throws ComponentException
     *
     * @return ValidationException
     */
    public function exception(Validatable $validatable, $input, array $extraParams = []): ValidationException
    {
        $reflection = new ReflectionObject($validatable);
        $ruleName = $reflection->getShortName();
        foreach ($this->exceptionsNamespaces as $namespace) {
            $exceptionName = sprintf('%s\\%sException', $namespace, $ruleName);
            if (!class_exists($exceptionName)) {
                continue;
            }

            $name = $validatable->getName() ?: stringify($input);
            $params = ['input' => $input] + $extraParams + $this->extractPropertiesValues($validatable, $reflection);

            return $this->createValidationException($exceptionName, $name, $params);
        }

        throw new ComponentException(sprintf('Cannot find exception for "%s" rule', lcfirst($ruleName)));
    }

    /**
     * Creates a reflection based on class name.
     *
     *
     * @param string $name
     * @param string $parentName
     *
     * @throws InvalidClassException
     *
     * @return ReflectionClass
     */
    private function createReflectionClass(string $name, string $parentName): ReflectionClass
    {
        $reflection = new ReflectionClass($name);
        if (!$reflection->isSubclassOf($parentName)) {
            throw new InvalidClassException(sprintf('"%s" must be an instance of "%s"', $name, $parentName));
        }

        if (!$reflection->isInstantiable()) {
            throw new InvalidClassException(sprintf('"%s" must be instantiable', $name));
        }

        return $reflection;
    }

    /**
     * Filters namespaces.
     *
     * Ensure namespaces are in the right format and contain the default namespaces.
     *
     * @param array $namespaces
     * @param array $defaultNamespaces
     *
     * @return array
     */
    private function filterNamespaces(array $namespaces, array $defaultNamespaces): array
    {
        $filter = function (string $namespace): string {
            return trim($namespace, '\\');
        };

        return array_unique(
            array_merge(
                array_map($filter, $namespaces),
                array_map($filter, $defaultNamespaces)
            )
        );
    }

    /**
     * Creates a Validation exception.
     *
     * @param string $exceptionName
     * @param mixed $name
     * @param array $params
     *
     * @return ValidationException
     */
    private function createValidationException(string $exceptionName, $name, array $params): ValidationException
    {
        $exception = $this->createReflectionClass($exceptionName, ValidationException::class)->newInstance();
        $exception->configure($name, $params);
        if (isset($params['template'])) {
            $exception->setTemplate($params['template']);
        }

        return $exception;
    }

    /**
     * @param Validatable $validatable
     * @param ReflectionObject $reflection
     *
     * @return array
     */
    private function extractPropertiesValues(Validatable $validatable, ReflectionObject $reflection): array
    {
        $values = [];
        foreach ($reflection->getProperties() as $property) {
            $property->setAccessible(true);

            $values[$property->getName()] = $property->getValue($validatable);
        }

        return $values;
    }
}


1		<?php
2
3		/*
4		* This file is part of Respect/Validation.
5		*
6		* (c) Alexandre Gomes Gaigalas <[email protected]>
7		*
8		* For the full copyright and license information, please view the "LICENSE.md"
9		* file that was distributed with this source code.
10		*/
11
12		declare(strict_types=1);
13
14		namespace Respect\Validation;
15
16		use function array_map;
17		use function array_merge;
18		use function array_unique;
19		use function class_exists;
20		use function lcfirst;
21		use function Respect\Stringifier\stringify;
		0 ignored issues – show introduced 2018-01-09 19:40 UTC by Report Bug Copy Issue Report The function `Respect\Stringifier\stringify` was not found. Maybe you did not declare it correctly or list all dependencies? Loading history...
22		use ReflectionClass;
23		use ReflectionObject;
24		use Respect\Validation\Exceptions\ComponentException;
25		use Respect\Validation\Exceptions\InvalidClassException;
26		use Respect\Validation\Exceptions\ValidationException;
27
28		/**
29		* Factory of objects.
30		*
31		* @author Henrique Moody <[email protected]>
32		*
33		* @since 0.8.0
34		*/
35		final class Factory
36		{
37		private const DEFAULT_RULES_NAMESPACES = [
38		'Respect\\Validation\\Rules',
39		'Respect\\Validation\\Rules\\Locale',
40		'Respect\\Validation\\Rules\\SubdivisionCode',
41		];
42
43		private const DEFAULT_EXCEPTIONS_NAMESPACES = [
44		'Respect\\Validation\\Exceptions',
45		'Respect\\Validation\\Exceptions\\Locale',
46		'Respect\\Validation\\Exceptions\\SubdivisionCode',
47		];
48
49		/**
50		* Default instance of the Factory.
51		*
52		* @var Factory
53		*/
54		private static $defaultInstance;
55
56		/**
57		* @var string[]
58		*/
59		private $rulesNamespaces = [];
60
61		/**
62		* @var string[]
63		*/
64		private $exceptionsNamespaces = [];
65
66		/**
67		* Initializes the factory with the defined namespaces.
68		*
69		* If the default namespace is not in the array, it will be add to the end
70		* of the array.
71		*
72		* @param string[] $rulesNamespaces
73		* @param string[] $exceptionsNamespaces
74		*/
75	13	public function __construct(array $rulesNamespaces, array $exceptionsNamespaces)
76		{
77	13	$this->rulesNamespaces = $this->filterNamespaces($rulesNamespaces, self::DEFAULT_RULES_NAMESPACES);
78	13	$this->exceptionsNamespaces = $this->filterNamespaces($exceptionsNamespaces, self::DEFAULT_EXCEPTIONS_NAMESPACES);
79	13	}
80
81		/**
82		* Define the default instance of the Factory.
83		*
84		* @param Factory $defaultInstance
85		*/
86	1	public static function setDefaultInstance(self $defaultInstance): void
87		{
88	1	self::$defaultInstance = $defaultInstance;
89	1	}
90
91		/**
92		* Returns the default instance of the Factory.
93		*
94		* @return Factory
95		*/
96	4	public static function getDefaultInstance(): self
97		{
98	4	if (null === self::$defaultInstance) {
99		self::$defaultInstance = new self(self::DEFAULT_RULES_NAMESPACES, self::DEFAULT_EXCEPTIONS_NAMESPACES);
100		}
101
102	4	return self::$defaultInstance;
103		}
104
105		/**
106		* Creates a rule.
107		*
108		* @param string $ruleName
109		* @param array $arguments
110		*
111		* @throws ComponentException
112		*
113		* @return Validatable
114		*/
115	8	public function rule(string $ruleName, array $arguments = []): Validatable
116		{
117	8	foreach ($this->rulesNamespaces as $namespace) {
118	8	$className = sprintf('%s\\%s', $namespace, ucfirst($ruleName));
119	8	if (!class_exists($className)) {
120	3	continue;
121		}
122
123	6	return $this->createReflectionClass($className, Validatable::class)->newInstanceArgs($arguments);
124		}
125
126	2	throw new ComponentException(sprintf('"%s" is not a valid rule name', $ruleName));
127		}
128
129		/**
130		* Creates an exception.
131		*
132		*
133		* @param Validatable $validatable
134		* @param mixed $input
135		* @param array $extraParams
136		*
137		* @throws ComponentException
138		*
139		* @return ValidationException
140		*/
141	6	public function exception(Validatable $validatable, $input, array $extraParams = []): ValidationException
142		{
143	6	$reflection = new ReflectionObject($validatable);
144	6	$ruleName = $reflection->getShortName();
145	6	foreach ($this->exceptionsNamespaces as $namespace) {
146	6	$exceptionName = sprintf('%s\\%sException', $namespace, $ruleName);
147	6	if (!class_exists($exceptionName)) {
148	2	continue;
149		}
150
151	5	$name = $validatable->getName() ?: stringify($input);
152	5	$params = ['input' => $input] + $extraParams + $this->extractPropertiesValues($validatable, $reflection);
153
154	5	return $this->createValidationException($exceptionName, $name, $params);
155		}
156
157	1	throw new ComponentException(sprintf('Cannot find exception for "%s" rule', lcfirst($ruleName)));
158		}
159
160		/**
161		* Creates a reflection based on class name.
162		*
163		*
164		* @param string $name
165		* @param string $parentName
166		*
167		* @throws InvalidClassException
168		*
169		* @return ReflectionClass
170		*/
171	11	private function createReflectionClass(string $name, string $parentName): ReflectionClass
172		{
173	11	$reflection = new ReflectionClass($name);
174	11	if (!$reflection->isSubclassOf($parentName)) {
175	1	throw new InvalidClassException(sprintf('"%s" must be an instance of "%s"', $name, $parentName));
176		}
177
178	10	if (!$reflection->isInstantiable()) {
179	1	throw new InvalidClassException(sprintf('"%s" must be instantiable', $name));
180		}
181
182	9	return $reflection;
183		}
184
185		/**
186		* Filters namespaces.
187		*
188		* Ensure namespaces are in the right format and contain the default namespaces.
189		*
190		* @param array $namespaces
191		* @param array $defaultNamespaces
192		*
193		* @return array
194		*/
195		private function filterNamespaces(array $namespaces, array $defaultNamespaces): array
196		{
197	13	$filter = function (string $namespace): string {
198	13	return trim($namespace, '\\');
199	13	};
200
201	13	return array_unique(
202	13	array_merge(
203	13	array_map($filter, $namespaces),
204	13	array_map($filter, $defaultNamespaces)
205		)
206		);
207		}
208
209		/**
210		* Creates a Validation exception.
211		*
212		* @param string $exceptionName
213		* @param mixed $name
214		* @param array $params
215		*
216		* @return ValidationException
217		*/
218	5	private function createValidationException(string $exceptionName, $name, array $params): ValidationException
219		{
220	5	$exception = $this->createReflectionClass($exceptionName, ValidationException::class)->newInstance();
221	5	$exception->configure($name, $params);
222	5	if (isset($params['template'])) {
223	1	$exception->setTemplate($params['template']);
224		}
225
226	5	return $exception;
227		}
228
229		/**
230		* @param Validatable $validatable
231		* @param ReflectionObject $reflection
232		*
233		* @return array
234		*/
235	5	private function extractPropertiesValues(Validatable $validatable, ReflectionObject $reflection): array
236		{
237	5	$values = [];
238	5	foreach ($reflection->getProperties() as $property) {
239	5	$property->setAccessible(true);
240
241	5	$values[$property->getName()] = $property->getValue($validatable);
242		}
243
244	5	return $values;
245		}
246		}
247

Respect / Validation

Scrutinizer GitHub App not installed

Pull Request — master (#899)

Factory::getDefaultInstance() A

Complexity

Size

Duplication

Code Coverage

Importance

Duplication Side-by-Side

Filter issues like