ClassDefinition::addInterface() - Code Metrics - Inspection of "Add ConstantNaming analyzer" - ovr/phpsa - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#132)

by Enrico

created 2016-09-17 10:35 UTC

ClassDefinition::addInterface() A

↳ Parent: ClassDefinition

Complexity

Conditions	1
Paths	1

Size

Total Lines	4
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	2

Importance

Changes

Metric	Value
cc	1
eloc	2
nc	1
nop	1
dl	0
loc	4
ccs	0
cts	3
cp	0
crap	2
rs	10
c	0
b	0
f	0

<?php
/**
 * @author Patsura Dmitry https://github.com/ovr <[email protected]>
 */

namespace PHPSA\Definition;

use PHPSA\CompiledExpression;
use PHPSA\Context;
use PhpParser\Node;
use PHPSA\Variable;
use PHPSA\Compiler\Event;

/**
 * Class ClassDefinition
 * @package PHPSA\Definition
 */
class ClassDefinition extends ParentDefinition
{
    /**
     * @var int
     */
    protected $type;

    /**
     * Class methods
     *
     * @var ClassMethod[]
     */
    protected $methods = array();

    /**
     * Class properties
     *
     * @var Node\Stmt\Property[]
     */
    protected $properties = array();

    /**
     * Class constants
     *
     * @var Node\Stmt\Const_[]
     */
    protected $constants = array();

    /**
     * @todo Use Finder
     *
     * @var string
     */
    protected $filepath;

    /**
     * @var Node\Stmt\Class_|null
     */
    protected $statement;

    /**
     * @var string|null
     */
    protected $extendsClass;

    /**
     * @var ClassDefinition|null
     */
    protected $extendsClassDefinition;


    /**
     * @var array
     */
    protected $interfaces = array();

    /**
     * @param string $name
     * @param Node\Stmt\Class_ $statement
     * @param integer $type
     */
    public function __construct($name, Node\Stmt\Class_ $statement = null, $type = 0)
    {
        $this->name = $name;
        $this->statement = $statement;
        $this->type = $type;
    }

    /**
     * @param ClassMethod $methodDefintion
     */
    public function addMethod(ClassMethod $methodDefintion)
    {
        $this->methods[$methodDefintion->getName()] = $methodDefintion;
    }

    /**
     * @param Node\Stmt\Property $property
     */
    public function addProperty(Node\Stmt\Property $property)
    {
        foreach ($property->props as $propertyDefinition) {
            $this->properties[$propertyDefinition->name] = $propertyDefinition;
        }
    }

    /**
     * @param Node\Stmt\ClassConst $const
     */
    public function addConst(Node\Stmt\ClassConst $const)
    {
        $this->constants[$const->consts[0]->name] = $const;
    }

    /**
     * @param Context $context
     * @return $this
     */
    public function compile(Context $context)
    {
        if ($this->compiled) {
            return true;
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());
}
        }

        $context->getEventManager()->fire(
            Event\StatementBeforeCompile::EVENT_NAME,
            new Event\StatementBeforeCompile(
                $this->statement,
/** @return stdClass|null */
function mayReturnNull() { }

function doesNotAcceptNull(stdClass $x) { }

// With potential error.
function withoutCheck() {
    $x = mayReturnNull();
    doesNotAcceptNull($x); // Potential error here.
}

// Safe - Alternative 1
function withCheck1() {
    $x = mayReturnNull();
    if ( ! $x instanceof stdClass) {
        throw new \LogicException('$x must be defined.');
    }
    doesNotAcceptNull($x);
}

// Safe - Alternative 2
function withCheck2() {
    $x = mayReturnNull();
    if ($x instanceof stdClass) {
        doesNotAcceptNull($x);
    }
}
                $context
            )
        );

        $this->compiled = true;
        $context->setFilepath($this->filepath);
        $context->setScope($this);

        foreach ($this->constants as $const) {
            $context->getEventManager()->fire(
                Event\StatementBeforeCompile::EVENT_NAME,
                new Event\StatementBeforeCompile(
                    $const,
                    $context
                )
            );
        }

        foreach ($this->methods as $method) {
            $context->clearSymbols();

            if (!$method->isStatic()) {
                $thisPtr = new Variable('this', $this, CompiledExpression::OBJECT);
                $thisPtr->incGets();
                $context->addVariable($thisPtr);
            }

            $method->compile($context);

            $symbols = $context->getSymbols();
            if (count($symbols) > 0) {
                foreach ($symbols as $name => $variable) {
                    if ($variable->isUnused()) {
                        $context->warning(
                            'unused-' . $variable->getSymbolType(),
                            sprintf(
                                'Unused ' . $variable->getSymbolType() . ' $%s in method %s()',
                                $variable->getName(),
                                $method->getName()
                            )
                        );
                    }
                }
            }
        }

        return $this;
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());
}
    }

    /**
     * @param string $name
     * @param boolean|false $inherit
     * @return bool
     */
    public function hasMethod($name, $inherit = false)
    {
        if (isset($this->methods[$name])) {
            return true;
        }

        if ($inherit && $this->extendsClassDefinition && $this->extendsClassDefinition->hasMethod($name, $inherit)) {
            $method = $this->extendsClassDefinition->getMethod($name, $inherit);
            return $method && ($method->isPublic() || $method->isProtected());
        }

        return false;
    }

    /**
     * @param string $name
     * @param bool $inherit
     * @return bool
     */
    public function hasConst($name, $inherit = false)
    {
        if ($inherit && $this->extendsClassDefinition && $this->extendsClassDefinition->hasConst($name, $inherit)) {
            return true;
        }

        return isset($this->constants[$name]);
    }

    /**
     * @param $name
     * @param boolean|false $inherit
     * @return ClassMethod|null
     */
    public function getMethod($name, $inherit = false)
    {
        if (isset($this->methods[$name])) {
            return $this->methods[$name];
        }

        if ($inherit && $this->extendsClassDefinition) {
            return $this->extendsClassDefinition->getMethod($name, $inherit);
        }

        return null;
    }

    /**
     * @param $name
     * @param bool $inherit
     * @return bool
     */
    public function hasProperty($name, $inherit = false)
    {
        if (isset($this->properties[$name])) {
            return isset($this->properties[$name]);
        }

        return $inherit && $this->extendsClassDefinition && $this->extendsClassDefinition->hasProperty($name, true);
    }

    /**
     * @param string $name
     * @param bool $inherit
     * @return Node\Stmt\Property
     */
    public function getProperty($name, $inherit = false)
    {
        assert($this->hasProperty($name, $inherit));

        if (isset($this->properties[$name])) {
            return $this->properties[$name];
        }

        if ($inherit && $this->extendsClassDefinition) {
            return $this->extendsClassDefinition->getProperty($name, true);
        }

        return null;
    }

    /**
     * @return string
     */
    public function getFilepath()
    {
        return $this->filepath;
    }

    /**
     * @param string $filepath
     */
    public function setFilepath($filepath)
    {
        $this->filepath = $filepath;
    }

    /**
     * @return bool
     */
    public function isAbstract()
    {
        return (bool) ($this->type & Node\Stmt\Class_::MODIFIER_ABSTRACT);
    }

    /**
     * @param null|string $extendsClass
     */
    public function setExtendsClass($extendsClass)
    {
        $this->extendsClass = $extendsClass;
    }

    /**
     * @return null|ClassDefinition
     */
    public function getExtendsClassDefinition()
    {
        return $this->extendsClassDefinition;
    }

    /**
     * @param ClassDefinition $extendsClassDefinition
     */
    public function setExtendsClassDefinition(ClassDefinition $extendsClassDefinition)

    {
        $this->extendsClassDefinition = $extendsClassDefinition;
    }

    /**
     * @param array $interface
     */
    public function addInterface($interface)
    {
        $this->interfaces[] = $interface;
    }

    /**
     * @return null|string
     */
    public function getExtendsClass()
    {
        return $this->extendsClass;
    }
}


1		<?php
2		/**
3		* @author Patsura Dmitry https://github.com/ovr <[email protected]>
4		*/
5
6		namespace PHPSA\Definition;
7
8		use PHPSA\CompiledExpression;
9		use PHPSA\Context;
10		use PhpParser\Node;
11		use PHPSA\Variable;
12		use PHPSA\Compiler\Event;
13
14		/**
15		* Class ClassDefinition
16		* @package PHPSA\Definition
17		*/
18		class ClassDefinition extends ParentDefinition
19		{
20		/**
21		* @var int
22		*/
23		protected $type;
24
25		/**
26		* Class methods
27		*
28		* @var ClassMethod[]
29		*/
30		protected $methods = array();
31
32		/**
33		* Class properties
34		*
35		* @var Node\Stmt\Property[]
36		*/
37		protected $properties = array();
38
39		/**
40		* Class constants
41		*
42		* @var Node\Stmt\Const_[]
43		*/
44		protected $constants = array();
45
46		/**
47		* @todo Use Finder
48		*
49		* @var string
50		*/
51		protected $filepath;
52
53		/**
54		* @var Node\Stmt\Class_\|null
55		*/
56		protected $statement;
57
58		/**
59		* @var string\|null
60		*/
61		protected $extendsClass;
62
63		/**
64		* @var ClassDefinition\|null
65		*/
66		protected $extendsClassDefinition;
		0 ignored issues – show Comprehensibility Naming introduced 2016-02-06 15:22 UTC by Report Bug Copy Issue Report The variable name `$extendsClassDefinition` exceeds the maximum configured length of `20`. Very long variable names usually make code harder to read. It is therefore recommended not to make variable names too verbose. Loading history...
67
68		/**
69		* @var array
70		*/
71		protected $interfaces = array();
72
73		/**
74		* @param string $name
75		* @param Node\Stmt\Class_ $statement
76		* @param integer $type
77		*/
78	448	public function __construct($name, Node\Stmt\Class_ $statement = null, $type = 0)
79		{
80	448	$this->name = $name;
81	448	$this->statement = $statement;
82	448	$this->type = $type;
83	448	}
84
85		/**
86		* @param ClassMethod $methodDefintion
87		*/
88	20	public function addMethod(ClassMethod $methodDefintion)
89		{
90	20	$this->methods[$methodDefintion->getName()] = $methodDefintion;
91	20	}
92
93		/**
94		* @param Node\Stmt\Property $property
95		*/
96	2	public function addProperty(Node\Stmt\Property $property)
97		{
98	2	foreach ($property->props as $propertyDefinition) {
99	2	$this->properties[$propertyDefinition->name] = $propertyDefinition;
100	2	}
101	2	}
102
103		/**
104		* @param Node\Stmt\ClassConst $const
105		*/
106	3	public function addConst(Node\Stmt\ClassConst $const)
107		{
108	3	$this->constants[$const->consts[0]->name] = $const;
109	3	}
110
111		/**
112		* @param Context $context
113		* @return $this
114		*/
115	20	public function compile(Context $context)
116		{
117	20	if ($this->compiled) {
118		return true;
		0 ignored issues – show Bug Best Practice introduced 2015-12-20 20:34 UTC by Report Bug Copy Issue Report The return type of `return true;` (`boolean`) is incompatible with the return type documented by `PHPSA\Definition\ClassDefinition::compile` of type `PHPSA\Definition\ClassDefinition`. 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...
119		}
120
121	20	$context->getEventManager()->fire(
122	20	Event\StatementBeforeCompile::EVENT_NAME,
123	20	new Event\StatementBeforeCompile(
124	20	$this->statement,
		0 ignored issues – show Bug introduced 2016-09-08 19:07 UTC by Report Bug Copy Issue Report It seems like `$this->statement` can be `null`; however, `__construct()` does not accept `null`, maybe add an additional type check? Unless you are absolutely sure that the expression can never be null because of other conditions, we strongly recommend to add an additional type check to your code: /** @return stdClass\|null */ function mayReturnNull() { } function doesNotAcceptNull(stdClass $x) { } // With potential error. function withoutCheck() { $x = mayReturnNull(); doesNotAcceptNull($x); // Potential error here. } // Safe - Alternative 1 function withCheck1() { $x = mayReturnNull(); if ( ! $x instanceof stdClass) { throw new \LogicException('$x must be defined.'); } doesNotAcceptNull($x); } // Safe - Alternative 2 function withCheck2() { $x = mayReturnNull(); if ($x instanceof stdClass) { doesNotAcceptNull($x); } } Loading history...
125		$context
126	20	)
127	20	);
128
129	20	$this->compiled = true;
130	20	$context->setFilepath($this->filepath);
131	20	$context->setScope($this);
132
133	20	foreach ($this->constants as $const) {
134	1	$context->getEventManager()->fire(
135	1	Event\StatementBeforeCompile::EVENT_NAME,
136	1	new Event\StatementBeforeCompile(
137	1	$const,
138		$context
139	1	)
140	1	);
141	20	}
142
143	20	foreach ($this->methods as $method) {
144	19	$context->clearSymbols();
145
146	19	if (!$method->isStatic()) {
147	19	$thisPtr = new Variable('this', $this, CompiledExpression::OBJECT);
148	19	$thisPtr->incGets();
149	19	$context->addVariable($thisPtr);
150	19	}
151
152	19	$method->compile($context);
153
154	19	$symbols = $context->getSymbols();
155	19	if (count($symbols) > 0) {
156	19	foreach ($symbols as $name => $variable) {
157	19	if ($variable->isUnused()) {
158	2	$context->warning(
159	2	'unused-' . $variable->getSymbolType(),
160	2	sprintf(
161	2	'Unused ' . $variable->getSymbolType() . ' $%s in method %s()',
162	2	$variable->getName(),
163	2	$method->getName()
164	2	)
165	2	);
166	2	}
167	19	}
168	19	}
169	20	}
170
171	20	return $this;
		0 ignored issues – show Bug Best Practice introduced 2015-11-22 15:25 UTC by Report Bug Copy Issue Report The return type of `return $this;` (`PHPSA\Definition\ClassDefinition`) is incompatible with the return type declared by the abstract method `PHPSA\Definition\AbstractDefinition::compile` of type `boolean`. 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...
172		}
173
174		/**
175		* @param string $name
176		* @param boolean\|false $inherit
177		* @return bool
178		*/
179	1	public function hasMethod($name, $inherit = false)
180		{
181	1	if (isset($this->methods[$name])) {
182	1	return true;
183		}
184
185	1	if ($inherit && $this->extendsClassDefinition && $this->extendsClassDefinition->hasMethod($name, $inherit)) {
186		$method = $this->extendsClassDefinition->getMethod($name, $inherit);
187		return $method && ($method->isPublic() \|\| $method->isProtected());
188		}
189
190	1	return false;
191		}
192
193		/**
194		* @param string $name
195		* @param bool $inherit
196		* @return bool
197		*/
198	2	public function hasConst($name, $inherit = false)
199		{
200	2	if ($inherit && $this->extendsClassDefinition && $this->extendsClassDefinition->hasConst($name, $inherit)) {
201	1	return true;
202		}
203
204	2	return isset($this->constants[$name]);
205		}
206
207		/**
208		* @param $name
209		* @param boolean\|false $inherit
210		* @return ClassMethod\|null
211		*/
212	1	public function getMethod($name, $inherit = false)
213		{
214	1	if (isset($this->methods[$name])) {
215	1	return $this->methods[$name];
216		}
217
218		if ($inherit && $this->extendsClassDefinition) {
219		return $this->extendsClassDefinition->getMethod($name, $inherit);
220		}
221
222		return null;
223		}
224
225		/**
226		* @param $name
227		* @param bool $inherit
228		* @return bool
229		*/
230	1	public function hasProperty($name, $inherit = false)
231		{
232	1	if (isset($this->properties[$name])) {
233	1	return isset($this->properties[$name]);
234		}
235
236	1	return $inherit && $this->extendsClassDefinition && $this->extendsClassDefinition->hasProperty($name, true);
237		}
238
239		/**
240		* @param string $name
241		* @param bool $inherit
242		* @return Node\Stmt\Property
243		*/
244		public function getProperty($name, $inherit = false)
245		{
246		assert($this->hasProperty($name, $inherit));
247
248		if (isset($this->properties[$name])) {
249		return $this->properties[$name];
250		}
251
252		if ($inherit && $this->extendsClassDefinition) {
253		return $this->extendsClassDefinition->getProperty($name, true);
254		}
255
256		return null;
257		}
258
259		/**
260		* @return string
261		*/
262	20	public function getFilepath()
263		{
264	20	return $this->filepath;
265		}
266
267		/**
268		* @param string $filepath
269		*/
270	20	public function setFilepath($filepath)
271		{
272	20	$this->filepath = $filepath;
273	20	}
274
275		/**
276		* @return bool
277		*/
278		public function isAbstract()
279		{
280		return (bool) ($this->type & Node\Stmt\Class_::MODIFIER_ABSTRACT);
281		}
282
283		/**
284		* @param null\|string $extendsClass
285		*/
286		public function setExtendsClass($extendsClass)
287		{
288		$this->extendsClass = $extendsClass;
289		}
290
291		/**
292		* @return null\|ClassDefinition
293		*/
294		public function getExtendsClassDefinition()
295		{
296		return $this->extendsClassDefinition;
297		}
298
299		/**
300		* @param ClassDefinition $extendsClassDefinition
301		*/
302	1	public function setExtendsClassDefinition(ClassDefinition $extendsClassDefinition)
		0 ignored issues – show Comprehensibility Naming introduced 2016-02-06 15:22 UTC by Report Bug Copy Issue Report The variable name `$extendsClassDefinition` exceeds the maximum configured length of `20`. Very long variable names usually make code harder to read. It is therefore recommended not to make variable names too verbose. Loading history...
303		{
304	1	$this->extendsClassDefinition = $extendsClassDefinition;
305	1	}
306
307		/**
308		* @param array $interface
309		*/
310		public function addInterface($interface)
311		{
312		$this->interfaces[] = $interface;
313		}
314
315		/**
316		* @return null\|string
317		*/
318	20	public function getExtendsClass()
319		{
320	20	return $this->extendsClass;
321		}
322		}
323

ovr / phpsa

Pull Request — master (#132)

ClassDefinition::addInterface() A

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