ServicesManager - Code Metrics - Inspection of "Add ServicesManager" - onoi/callback-container - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#3)

by mw

created 2016-09-08 00:42 UTC

ServicesManager A

↳ Parent: Project

Complexity

Total Complexity

Size/Duplication

Total Lines	94
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	2

Test Coverage

Coverage

100%

Importance

Changes	1
Bugs	0	Features	1

Metric	Value
c	1
b	0
f	1
dl	0
loc	94
wmc	10
lcom	1
cbo	2
ccs	28
cts	28
cp	1
rs	10

7 Methods

Rating	Name	Size	Complexity
A	__construct()	3	1
A	newManager()	3	1
A	add()	14	3
A	has()	3	1
A	getBy()	8	2
A	removeBy()	3	1
A	overrideWith()	3	1

<?php

namespace Onoi\CallbackContainer;

use RuntimeException;

/**
 * Convenience class to handle services isolated from an active CallbackInstantiator
 * instance.
 *
 * @license GNU GPL v2+
 * @since 1.2
 *
 * @author mwjames
 */
class ServicesManager {

	/**
	 * @var CallbackInstantiator
	 */
	private $callbackInstantiator;

	/**
	 * @since 1.2
	 *
	 * @param CallbackInstantiator $callbackInstantiator
	 */
	public function __construct( CallbackInstantiator $callbackInstantiator ) {
		$this->callbackInstantiator = $callbackInstantiator;
	}

	/**
	 * @since 1.2
	 *
	 * @return ServicesManager
	 */
	public static function newManager() {
		return new self( new DeferredCallbackLoader() );
	}

	/**
	 * @since 1.2
	 *
	 * @param string $serviceName
	 * @param mixed $service
	 * @param string|null $type
	 */
	public function add( $serviceName, $service, $type = null ) {

		if ( !is_callable( $service ) ) {
			$service = function() use( $service ) {
				return $service;
			};
		}

		$this->callbackInstantiator->registerCallback( $serviceName, $service );
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);

		if ( $type !== null ) {
			$this->callbackInstantiator->registerExpectedReturnType( $serviceName, $type );
		}
	}

	/**
	 * @since 1.2
	 *
	 * @param string $serviceName
	 *
	 * @return boolean
	 */
	public function has( $serviceName ) {
		return $this->callbackInstantiator->isRegistered( $serviceName );
	}

	/**
	 * @since 1.2
	 *
	 * @param string $serviceName
	 *
	 * @return mixed
	 */
	public function getBy( $serviceName ) {

		if ( !$this->callbackInstantiator->isRegistered( $serviceName ) ) {
			throw new RuntimeException( "$serviceName is an unknown service." );
		}

		return $this->callbackInstantiator->singleton( $serviceName );
	}

	/**
	 * @since 1.2
	 *
	 * @param string $serviceName
	 */
	public function removeBy( $serviceName ) {
		$this->callbackInstantiator->deregister( $serviceName );
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.
    }
}
	}

	/**
	 * @since 1.2
	 *
	 * @param string $serviceName
	 * @param mixed $service
	 */
	public function overrideWith( $serviceName, $service ) {
		$this->callbackInstantiator->registerObject( $serviceName, $service );
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.
    }
}
	}

}


1		<?php
2
3		namespace Onoi\CallbackContainer;
4
5		use RuntimeException;
6
7		/**
8		* Convenience class to handle services isolated from an active CallbackInstantiator
9		* instance.
10		*
11		* @license GNU GPL v2+
12		* @since 1.2
13		*
14		* @author mwjames
15		*/
16		class ServicesManager {
17
18		/**
19		* @var CallbackInstantiator
20		*/
21		private $callbackInstantiator;
22
23		/**
24		* @since 1.2
25		*
26		* @param CallbackInstantiator $callbackInstantiator
27		*/
28	7	public function __construct( CallbackInstantiator $callbackInstantiator ) {
29	7	$this->callbackInstantiator = $callbackInstantiator;
30	7	}
31
32		/**
33		* @since 1.2
34		*
35		* @return ServicesManager
36		*/
37	7	public static function newManager() {
38	7	return new self( new DeferredCallbackLoader() );
39		}
40
41		/**
42		* @since 1.2
43		*
44		* @param string $serviceName
45		* @param mixed $service
46		* @param string\|null $type
47		*/
48	5	public function add( $serviceName, $service, $type = null ) {
49
50	5	if ( !is_callable( $service ) ) {
51	5	$service = function() use( $service ) {
52	2	return $service;
53	5	};
54	5	}
55
56	5	$this->callbackInstantiator->registerCallback( $serviceName, $service );
		0 ignored issues – show Documentation introduced 2016-09-08 00:43 UTC by Report Bug Copy Issue Report `$service` is of type `callable`, but the function expects a `object<Closure>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
57
58	5	if ( $type !== null ) {
59	1	$this->callbackInstantiator->registerExpectedReturnType( $serviceName, $type );
60	1	}
61	5	}
62
63		/**
64		* @since 1.2
65		*
66		* @param string $serviceName
67		*
68		* @return boolean
69		*/
70	5	public function has( $serviceName ) {
71	5	return $this->callbackInstantiator->isRegistered( $serviceName );
72		}
73
74		/**
75		* @since 1.2
76		*
77		* @param string $serviceName
78		*
79		* @return mixed
80		*/
81	5	public function getBy( $serviceName ) {
82
83	5	if ( !$this->callbackInstantiator->isRegistered( $serviceName ) ) {
84	1	throw new RuntimeException( "$serviceName is an unknown service." );
85		}
86
87	4	return $this->callbackInstantiator->singleton( $serviceName );
88		}
89
90		/**
91		* @since 1.2
92		*
93		* @param string $serviceName
94		*/
95	1	public function removeBy( $serviceName ) {
96	1	$this->callbackInstantiator->deregister( $serviceName );
		0 ignored issues – show Bug introduced 2016-09-08 00:43 UTC by Report Bug Copy Issue Report It seems like you code against a concrete implementation and not the interface `Onoi\CallbackContainer\CallbackInstantiator` as the method `deregister()` does only exist in the following implementations of said interface: `Onoi\CallbackContainer\DeferredCallbackLoader`. 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...
97	1	}
98
99		/**
100		* @since 1.2
101		*
102		* @param string $serviceName
103		* @param mixed $service
104		*/
105	2	public function overrideWith( $serviceName, $service ) {
106	2	$this->callbackInstantiator->registerObject( $serviceName, $service );
		0 ignored issues – show Bug introduced 2016-09-08 00:43 UTC by Report Bug Copy Issue Report It seems like you code against a concrete implementation and not the interface `Onoi\CallbackContainer\CallbackInstantiator` as the method `registerObject()` does only exist in the following implementations of said interface: `Onoi\CallbackContainer\DeferredCallbackLoader`. 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...
107	2	}
108
109		}
110

onoi / callback-container

Pull Request — master (#3)

ServicesManager A

Complexity

Size/Duplication

Coupling/Cohesion

Test Coverage

Importance

7 Methods

Available Fixes

Available Fixes

Duplication Side-by-Side

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