Completed
Push — master ( 6ab7bd...834806 )
by Дмитрий
05:03
created

ClassDefinition::setFilepath()   A

Complexity

Conditions 1
Paths 1

Size

Total Lines 4
Code Lines 2

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 3
CRAP Score 1

Importance

Changes 0
Metric Value
cc 1
eloc 2
nc 1
nop 1
dl 0
loc 4
ccs 3
cts 3
cp 1
crap 1
rs 10
c 0
b 0
f 0
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
13
/**
14
 * Class ClassDefinition
15
 * @package PHPSA\Definition
16
 */
17
class ClassDefinition extends ParentDefinition
18
{
19
    /**
20
     * @var int
21
     */
22
    protected $type;
23
24
    /**
25
     * Class methods
26
     *
27
     * @var ClassMethod[]
28
     */
29
    protected $methods = array();
30
31
    /**
32
     * Class properties
33
     *
34
     * @var Node\Stmt\Property[]
35
     */
36
    protected $properties = array();
37
38
    /**
39
     * Class constants
40
     *
41
     * @var Node\Stmt\Const_[]
42
     */
43
    protected $constants = array();
44
45
    /**
46
     * @todo Use Finder
47
     *
48
     * @var string
49
     */
50
    protected $filepath;
51
52
    /**
53
     * @var string|null
54
     */
55
    protected $extendsClass;
56
57
    /**
58
     * @var ClassDefinition|null
59
     */
60
    protected $extendsClassDefinition;
0 ignored issues
show
Comprehensibility Naming introduced by
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.

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61
62
    /**
63
     * @var array
64
     */
65
    protected $interfaces = array();
66
67
    /**
68
     * @param string $name
69
     * @param integer $type
70
     */
71 389
    public function __construct($name, $type)
72
    {
73 389
        $this->name = $name;
74 389
        $this->type = $type;
75 389
    }
76
77
    /**
78
     * @param ClassMethod $methodDefintion
79
     */
80 13
    public function addMethod(ClassMethod $methodDefintion)
81
    {
82 13
        $this->methods[$methodDefintion->getName()] = $methodDefintion;
83 13
    }
84
85
    /**
86
     * @param Node\Stmt\Property $property
87
     */
88 2
    public function addProperty(Node\Stmt\Property $property)
89
    {
90 2
        $this->properties[$property->props[0]->name] = $property;
91 2
    }
92
93
    /**
94
     * @param Node\Stmt\ClassConst $const
95
     */
96
    public function addConst(Node\Stmt\ClassConst $const)
97
    {
98
        $this->constants[$const->consts[0]->name] = $const;
99
    }
100
101
    /**
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     * @param Context $context
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     * @return $this
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     */
105 12
    public function compile(Context $context)
106
    {
107 12
        if ($this->compiled) {
108
            return true;
0 ignored issues
show
Bug Best Practice introduced by
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.

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109
        }
110
111 12
        $this->compiled = true;
112 12
        $context->setFilepath($this->filepath);
113 12
        $context->setScope($this);
114
115 12
        foreach ($this->methods as $method) {
116 12
            $context->clearSymbols();
117
118 12
            if (!$method->isStatic()) {
119 12
                $thisPtr = new Variable('this', $this, CompiledExpression::OBJECT);
120 12
                $thisPtr->incGets();
121 12
                $context->addVariable($thisPtr);
122 12
            }
123
124 12
            $method->compile($context);
125
126 12
            $symbols = $context->getSymbols();
127 12
            if (count($symbols) > 0) {
128 12
                foreach ($symbols as $name => $variable) {
129 12
                    if ($variable->isUnused()) {
130 1
                        $context->warning(
131 1
                            'unused-' . $variable->getSymbolType(),
132 1
                            sprintf(
133 1
                                'Unused ' . $variable->getSymbolType() . ' $%s in method %s()',
134 1
                                $variable->getName(),
135 1
                                $method->getName()
136 1
                            )
137 1
                        );
138 1
                    }
139 12
                }
140 12
            }
141 12
        }
142
143 12
        return $this;
0 ignored issues
show
Bug Best Practice introduced by
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...
144
    }
145
146
    /**
147
     * @param string $name
148
     * @param boolean|false $inherit
149
     * @return bool
150
     */
151 1
    public function hasMethod($name, $inherit = false)
152
    {
153 1
        if (isset($this->methods[$name])) {
154 1
            return true;
155
        }
156
157 1
        if ($inherit && $this->extendsClassDefinition && $this->extendsClassDefinition->hasMethod($name, $inherit)) {
158
            $method = $this->extendsClassDefinition->getMethod($name, $inherit);
159
            return $method && ($method->isPublic() || $method->isProtected());
160
        }
161
162 1
        return false;
163
    }
164
165
    /**
166
     * @param $name
167
     * @return bool
168
     */
169
    public function hasConst($name)
170
    {
171
        return isset($this->constants[$name]);
172
    }
173
174
    /**
175
     * @param $name
176
     * @param boolean|false $inherit
177
     * @return ClassMethod|null
178
     */
179 1
    public function getMethod($name, $inherit = false)
180
    {
181 1
        if (isset($this->methods[$name])) {
182 1
            return $this->methods[$name];
183
        }
184
185
        if ($inherit && $this->extendsClassDefinition) {
186
            return $this->extendsClassDefinition->getMethod($name, $inherit);
187
        }
188
189
        return null;
190
    }
191
192
    /**
193
     * @param $name
194
     * @param bool $inherit
195
     * @return bool
196
     */
197 1
    public function hasProperty($name, $inherit = false)
198
    {
199 1
        if (isset($this->properties[$name])) {
200 1
            return isset($this->properties[$name]);
201
        }
202
203 1
        return $inherit && $this->extendsClassDefinition && $this->extendsClassDefinition->hasProperty($name, true);
204
    }
205
206
    /**
207
     * @param string $name
208
     * @param bool $inherit
209
     * @return Node\Stmt\Property
210
     */
211
    public function getProperty($name, $inherit = false)
212
    {
213
        assert($this->hasProperty($name, $inherit));
214
215
        if (isset($this->properties[$name])) {
216
            return $this->properties[$name];
217
        }
218
219
        if ($inherit && $this->extendsClassDefinition) {
220
            return $this->extendsClassDefinition->getProperty($name, true);
221
        }
222
223
        return null;
224
    }
225
226
    /**
227
     * @return string
228
     */
229 12
    public function getFilepath()
230
    {
231 12
        return $this->filepath;
232
    }
233
234
    /**
235
     * @param string $filepath
236
     */
237 12
    public function setFilepath($filepath)
238
    {
239 12
        $this->filepath = $filepath;
240 12
    }
241
242
    /**
243
     * @return bool
244
     */
245
    public function isAbstract()
246
    {
247
        return (bool) ($this->type & Node\Stmt\Class_::MODIFIER_ABSTRACT);
248
    }
249
250
    /**
251
     * @param null|string $extendsClass
252
     */
253
    public function setExtendsClass($extendsClass)
254
    {
255
        $this->extendsClass = $extendsClass;
256
    }
257
258
    /**
259
     * @return null|ClassDefinition
260
     */
261
    public function getExtendsClassDefinition()
262
    {
263
        return $this->extendsClassDefinition;
264
    }
265
266
    /**
267
     * @param ClassDefinition $extendsClassDefinition
268
     */
269
    public function setExtendsClassDefinition(ClassDefinition $extendsClassDefinition)
0 ignored issues
show
Comprehensibility Naming introduced by
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...
270
    {
271
        $this->extendsClassDefinition = $extendsClassDefinition;
272
    }
273
274
    /**
275
     * @param array $interface
276
     */
277
    public function addInterface($interface)
278
    {
279
        $this->interfaces[] = $interface;
280
    }
281
282
    /**
283
     * @return null|string
284
     */
285 12
    public function getExtendsClass()
286
    {
287 12
        return $this->extendsClass;
288
    }
289
}
290