ClassDiscovery::evaluateCondition() - Code Metrics - Inspection of "Added fallback on common classes. Puli is now opti..." - php-http/discovery - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#58)

by Tobias

created 2016-06-10 08:50 UTC

ClassDiscovery::evaluateCondition() C

↳ Parent: ClassDiscovery

Complexity

Conditions	7
Paths	6

Size

Total Lines	22
Code Lines	13

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	5
CRAP Score	20.0204

Importance

Changes	2
Bugs	0	Features	1

Metric	Value
cc	7
eloc	13
c	2
b	0
f	1
nc	6
nop	1
dl	0
loc	22
ccs	5
cts	14
cp	0.357
crap	20.0204
rs	6.9811

<?php

namespace Http\Discovery;

use Http\Discovery\Exception\NotFoundException;
use Http\Discovery\Exception\PuliNotAvailableException;
use Http\Discovery\FallbackStrategy\HttpClients;
use Http\Discovery\FallbackStrategy\DiactorosFactory;
use Http\Discovery\FallbackStrategy\GuzzleFactory;
use Puli\Discovery\Api\Discovery;

/**
 * Registry that based find results on class existence.
 *
 * @author David de Boer <[email protected]>
 * @author Márk Sági-Kazár <[email protected]>
 */
abstract class ClassDiscovery
{
    /**
     * @var GeneratedPuliFactory
     */
    private static $puliFactory;

    /**
     * @var Discovery
     */
    private static $puliDiscovery;

    /**
     * @return GeneratedPuliFactory
     */
    public static function getPuliFactory()
    {
        if (null === self::$puliFactory) {
            if (!defined('PULI_FACTORY_CLASS')) {
                throw new PuliNotAvailableException('Puli Factory is not available');
            }

            $puliFactoryClass = PULI_FACTORY_CLASS;

            if (!class_exists($puliFactoryClass)) {
                throw new PuliNotAvailableException('Puli Factory class does not exist');
            }

            self::$puliFactory = new $puliFactoryClass();
        }

        return self::$puliFactory;
    }

    /**
     * Sets the Puli factory.
     *
     * @param object $puliFactory
     */
    public static function setPuliFactory($puliFactory)
    {
        if (!is_callable([$puliFactory, 'createRepository']) || !is_callable([$puliFactory, 'createDiscovery'])) {
            throw new \InvalidArgumentException('The Puli Factory must expose a repository and a discovery');
        }

        self::$puliFactory = $puliFactory;
        self::$puliDiscovery = null;
    }

    /**
     * Resets the factory.
     */
    public static function resetPuliFactory()
    {
        self::$puliFactory = null;
        self::$puliDiscovery = null;
    }

    /**
     * Returns the Puli discovery layer.
     *
     * @return Discovery
     */
    public static function getPuliDiscovery()
    {
        if (!isset(self::$puliDiscovery)) {
            $factory = self::getPuliFactory();
            $repository = $factory->createRepository();

            self::$puliDiscovery = $factory->createDiscovery($repository);
        }

        return self::$puliDiscovery;
    }

    /**
     * Finds a class.
     *
     * @param $type
     *
     * @return string
     *
     * @throws NotFoundException
     */
    public static function findOneByType($type)
    {
        try {
            return self::puliFindOneByType($type);
        } catch (PuliNotAvailableException $e) {
            if (false !== $class = HttpClients::findOneByType($type)) {
                return $class;
            } elseif (false !== $class = GuzzleFactory::findOneByType($type)) {
                return $class;
            } elseif (false !== $class = DiactorosFactory::findOneByType($type)) {
                return $class;
            }
            throw new NotFoundException('Could not find resource using Puli nor common Guzzle/Diactoros classes', 0, $e);
        }
    }

    /**
     * Finds a class using Puli.
     *
     * @param $type
     *
     * @return string
     *
     * @throws NotFoundException
     * @throws PuliNotAvailableException
     */
    private static function puliFindOneByType($type)
    {
        $bindings = self::getPuliDiscovery()->findBindings($type);

        foreach ($bindings as $binding) {
            if ($binding->hasParameterValue('depends')) {
                $dependency = $binding->getParameterValue('depends');

                if (!self::evaluateCondition($dependency)) {
                    continue;
                }
            }

            // TODO: check class binding
            return $binding->getClassName();
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
        }

        throw new NotFoundException(sprintf('Resource of type "%s" not found', $type));
    }

    /**
     * Finds a resource.
     *
     * @return object
     */
    public static function find()
    {
        throw new \LogicException('Not implemented');
    }

    /**
     * Evaulates conditions to boolean.
     *
     * @param mixed $condition
     *
     * @return bool
     */
    protected static function evaluateCondition($condition)
    {
        if (is_string($condition)) {
            // Should be extended for functions, extensions???
            return class_exists($condition);
        } elseif (is_callable($condition)) {
            return $condition();
        } elseif (is_bool($condition)) {
            return $condition;
        } elseif (is_array($condition)) {
            $evaluatedCondition = true;

            // Immediately stop execution if the condition is false
            for ($i = 0; $i < count($condition) && false !== $evaluatedCondition; ++$i) {
                $evaluatedCondition &= static::evaluateCondition($condition[$i]);
            }

            return $evaluatedCondition;
        }

        return false;
    }
}


1		<?php
2
3		namespace Http\Discovery;
4
5		use Http\Discovery\Exception\NotFoundException;
6		use Http\Discovery\Exception\PuliNotAvailableException;
7		use Http\Discovery\FallbackStrategy\HttpClients;
8		use Http\Discovery\FallbackStrategy\DiactorosFactory;
9		use Http\Discovery\FallbackStrategy\GuzzleFactory;
10		use Puli\Discovery\Api\Discovery;
11
12		/**
13		* Registry that based find results on class existence.
14		*
15		* @author David de Boer <[email protected]>
16		* @author Márk Sági-Kazár <[email protected]>
17		*/
18		abstract class ClassDiscovery
19		{
20		/**
21		* @var GeneratedPuliFactory
22		*/
23		private static $puliFactory;
24
25		/**
26		* @var Discovery
27		*/
28		private static $puliDiscovery;
29
30		/**
31		* @return GeneratedPuliFactory
32		*/
33	10	public static function getPuliFactory()
34		{
35	10	if (null === self::$puliFactory) {
36		if (!defined('PULI_FACTORY_CLASS')) {
37		throw new PuliNotAvailableException('Puli Factory is not available');
38		}
39
40		$puliFactoryClass = PULI_FACTORY_CLASS;
41
42		if (!class_exists($puliFactoryClass)) {
43		throw new PuliNotAvailableException('Puli Factory class does not exist');
44		}
45
46		self::$puliFactory = new $puliFactoryClass();
47		}
48
49	10	return self::$puliFactory;
50		}
51
52		/**
53		* Sets the Puli factory.
54		*
55		* @param object $puliFactory
56		*/
57	21	public static function setPuliFactory($puliFactory)
58		{
59	21	if (!is_callable([$puliFactory, 'createRepository']) \|\| !is_callable([$puliFactory, 'createDiscovery'])) {
60		throw new \InvalidArgumentException('The Puli Factory must expose a repository and a discovery');
61		}
62
63	21	self::$puliFactory = $puliFactory;
64	21	self::$puliDiscovery = null;
65	21	}
66
67		/**
68		* Resets the factory.
69		*/
70	21	public static function resetPuliFactory()
71		{
72	21	self::$puliFactory = null;
73	21	self::$puliDiscovery = null;
74	21	}
75
76		/**
77		* Returns the Puli discovery layer.
78		*
79		* @return Discovery
80		*/
81	9	public static function getPuliDiscovery()
82		{
83	9	if (!isset(self::$puliDiscovery)) {
84	9	$factory = self::getPuliFactory();
85	9	$repository = $factory->createRepository();
86
87	9	self::$puliDiscovery = $factory->createDiscovery($repository);
88	9	}
89
90	9	return self::$puliDiscovery;
91		}
92
93		/**
94		* Finds a class.
95		*
96		* @param $type
97		*
98		* @return string
99		*
100		* @throws NotFoundException
101		*/
102	8	public static function findOneByType($type)
103		{
104		try {
105	8	return self::puliFindOneByType($type);
106	1	} catch (PuliNotAvailableException $e) {
107		if (false !== $class = HttpClients::findOneByType($type)) {
108		return $class;
109		} elseif (false !== $class = GuzzleFactory::findOneByType($type)) {
110		return $class;
111		} elseif (false !== $class = DiactorosFactory::findOneByType($type)) {
112		return $class;
113		}
114		throw new NotFoundException('Could not find resource using Puli nor common Guzzle/Diactoros classes', 0, $e);
115		}
116		}
117
118		/**
119		* Finds a class using Puli.
120		*
121		* @param $type
122		*
123		* @return string
124		*
125		* @throws NotFoundException
126		* @throws PuliNotAvailableException
127		*/
128	8	private static function puliFindOneByType($type)
129		{
130	8	$bindings = self::getPuliDiscovery()->findBindings($type);
131
132	8	foreach ($bindings as $binding) {
133	7	if ($binding->hasParameterValue('depends')) {
134	1	$dependency = $binding->getParameterValue('depends');
135
136	1	if (!self::evaluateCondition($dependency)) {
137	1	continue;
138		}
139		}
140
141		// TODO: check class binding
142	7	return $binding->getClassName();
		0 ignored issues – show Bug introduced 2015-12-25 20:45 UTC by Report Bug Copy Issue Report It seems like you code against a concrete implementation and not the interface `Puli\Discovery\Api\Binding\Binding` as the method `getClassName()` does only exist in the following implementations of said interface: `Puli\Discovery\Binding\ClassBinding`. Let’s take a look at an example: interface User { /** @return string / public function getPassword(); } class MyUser implements User { public function getPassword() { // return something } public function getDisplayName() { // return some name. } } class AuthSystem { public function authenticate(User $user) { $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName())); // do something. } } In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break. Available Fixes Change the type-hint for the parameter: class AuthSystem { public function authenticate(MyUser $user) { / ... / } } Add an additional type-check: class AuthSystem { public function authenticate(User $user) { if ($user instanceof MyUser) { $this->logger->info(/* ... /); } // or alternatively if ( ! $user instanceof MyUser) { throw new \LogicException( '$user must be an instance of MyUser, ' .'other instances are not supported.' ); } } } Note:* PHP Analyzer uses reverse abstract interpretation to narrow down the types inside the if block in such a case. Add the method to the interface: interface User { /** @return string / public function getPassword(); /* @return string */ public function getDisplayName(); } Loading history...
143	1	}
144
145	1	throw new NotFoundException(sprintf('Resource of type "%s" not found', $type));
146		}
147
148		/**
149		* Finds a resource.
150		*
151		* @return object
152		*/
153		public static function find()
154		{
155		throw new \LogicException('Not implemented');
156		}
157
158		/**
159		* Evaulates conditions to boolean.
160		*
161		* @param mixed $condition
162		*
163		* @return bool
164		*/
165	1	protected static function evaluateCondition($condition)
166		{
167	1	if (is_string($condition)) {
168		// Should be extended for functions, extensions???
169		return class_exists($condition);
170	1	} elseif (is_callable($condition)) {
171		return $condition();
172	1	} elseif (is_bool($condition)) {
173	1	return $condition;
174		} elseif (is_array($condition)) {
175		$evaluatedCondition = true;
176
177		// Immediately stop execution if the condition is false
178		for ($i = 0; $i < count($condition) && false !== $evaluatedCondition; ++$i) {
179		$evaluatedCondition &= static::evaluateCondition($condition[$i]);
180		}
181
182		return $evaluatedCondition;
183		}
184
185		return false;
186		}
187		}
188

php-http / discovery

Pull Request — master (#58)

ClassDiscovery::evaluateCondition() C

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