Handler - Code Metrics - Inspection of "allow controllers to return strings and arrays whi..." - htmlburger/wpemerge - Measure and Improve Code Quality continuously with Scrutinizer

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created 2017-11-23 10:08 UTC

Handler A

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Complexity

Total Complexity

Size/Duplication

Total Lines	98
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	1

Test Coverage

Coverage

Importance

Changes

Metric	Value
dl	0
loc	98
rs	10
c	0
b	0
f	0
ccs	0
cts	37
cp	0
wmc	13
lcom	1
cbo	1

5 Methods

Rating	Name	Size	Complexity
A	__construct()	3	1
B	parse()	21	5
A	executeHandler()	12	2
A	set()	9	2
A	execute()	13	3

<?php

namespace CarbonFramework\Routing;

use Closure;
use Exception;
use CarbonFramework\Framework;

/**
 * Represent a callable or a controller method to be executed in response to a request
 */
class Handler {
	/**
	 * Actual handler
	 *
	 * @var callable|array|null
	 */
	protected $handler = null;

	/**
	 * Constructor
	 *
	 * @param string|callable $handler
	 */
	public function __construct( $handler ) {
		$this->set( $handler );
	}

	/**
	 * Parse a handler to a callable or a [class, method] array
	 *
	 * @param  string|callable     $handler
	 * @return callable|array|null
	 */
	protected function parse( $handler ) {
		if ( $handler instanceof Closure ) {
			return $handler;
		}

		if ( is_string( $handler ) )  {
			$handlerPieces = preg_split( '/@|::/', $handler, 2 );
			if ( count( $handlerPieces ) === 1 ) {
				if ( is_callable( $handlerPieces[0] ) ) {
					return $handlerPieces[0];
				}
				return null;
			}
			return array(
				'class' => $handlerPieces[0],
				'method' => $handlerPieces[1],
			);
		}

		return null;
	}

	/**
	 * Execute the handler returning raw result
	 *
	 * @return string|array|\Psr\Http\Message\ResponseInterface
	 */
	protected function executeHandler() {
		$arguments = func_get_args();
		if ( is_callable( $this->handler ) ) {
			return call_user_func_array( $this->handler, $arguments );
		}

		$class = $this->handler['class'];
		$method = $this->handler['method'];

		$controller = Framework::instantiate( $class );
		return call_user_func_array( [$controller, $method], $arguments );
	}

	/**
	 * Set the handler
	 *
	 * @param  string|callable $new_handler
	 * @return null
	 */
	public function set( $new_handler ) {
		$handler = $this->parse( $new_handler );

		if ( $handler === null ) {
			throw new Exception( 'No or invalid handler provided.' );
		}

		$this->handler = $handler;
	}

	/**
	 * Execute the handler
	 *
	 * @return \Psr\Http\Message\ResponseInterface

	 */
	public function execute() {
		$response = call_user_func_array( [$this, 'executeHandler'], func_get_args() );

		if ( is_string( $response ) ) {
			return cf_output( $response );
		}

		if ( is_array( $response ) ) {
			return cf_json( $response );
		}

		return $response;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
	}
}


1			<?php
2
3			namespace CarbonFramework\Routing;
4
5			use Closure;
6			use Exception;
7			use CarbonFramework\Framework;
8
9			/**
10			* Represent a callable or a controller method to be executed in response to a request
11			*/
12			class Handler {
13			/**
14			* Actual handler
15			*
16			* @var callable\|array\|null
17			*/
18			protected $handler = null;
19
20			/**
21			* Constructor
22			*
23			* @param string\|callable $handler
24			*/
25			public function __construct( $handler ) {
26			$this->set( $handler );
27			}
28
29			/**
30			* Parse a handler to a callable or a [class, method] array
31			*
32			* @param string\|callable $handler
33			* @return callable\|array\|null
34			*/
35			protected function parse( $handler ) {
36			if ( $handler instanceof Closure ) {
37			return $handler;
38			}
39
40			if ( is_string( $handler ) ) {
41			$handlerPieces = preg_split( '/@\|::/', $handler, 2 );
42			if ( count( $handlerPieces ) === 1 ) {
43			if ( is_callable( $handlerPieces[0] ) ) {
44			return $handlerPieces[0];
45			}
46			return null;
47			}
48			return array(
49			'class' => $handlerPieces[0],
50			'method' => $handlerPieces[1],
51			);
52			}
53
54			return null;
55			}
56
57			/**
58			* Execute the handler returning raw result
59			*
60			* @return string\|array\|\Psr\Http\Message\ResponseInterface
61			*/
62			protected function executeHandler() {
63			$arguments = func_get_args();
64			if ( is_callable( $this->handler ) ) {
65			return call_user_func_array( $this->handler, $arguments );
66			}
67
68			$class = $this->handler['class'];
69			$method = $this->handler['method'];
70
71			$controller = Framework::instantiate( $class );
72			return call_user_func_array( [$controller, $method], $arguments );
73			}
74
75			/**
76			* Set the handler
77			*
78			* @param string\|callable $new_handler
79			* @return null
80			*/
81			public function set( $new_handler ) {
82			$handler = $this->parse( $new_handler );
83
84			if ( $handler === null ) {
85			throw new Exception( 'No or invalid handler provided.' );
86			}
87
88			$this->handler = $handler;
89			}
90
91			/**
92			* Execute the handler
93			*
94			* @return \Psr\Http\Message\ResponseInterface
			0 ignored issues – show Documentation introduced 2017-11-23 10:10 UTC by Report Bug Copy Issue Report Should the return type not be `\Psr\Http\Message\ResponseInterface\|null`? This check compares the return type specified in the `@return` annotation of a function or method doc comment with the types returned by the function and raises an issue if they mismatch. Loading history...
95			*/
96			public function execute() {
97			$response = call_user_func_array( [$this, 'executeHandler'], func_get_args() );
98
99			if ( is_string( $response ) ) {
100			return cf_output( $response );
101			}
102
103			if ( is_array( $response ) ) {
104			return cf_json( $response );
105			}
106
107			return $response;
			0 ignored issues – show Bug Best Practice introduced 2017-11-23 10:10 UTC by Report Bug Copy Issue Report The return type of `return $response;` (`object\|integer\|double\|null\|boolean`) is incompatible with the return type documented by `CarbonFramework\Routing\Handler::execute` of type `Psr\Http\Message\ResponseInterface\|null`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
108			}
109			}
110

htmlburger / wpemerge

Push — master ( fa63c5...708113 )

Handler A

Complexity

Size/Duplication

Coupling/Cohesion

Test Coverage

Importance

5 Methods

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