AbstractRule::setName()   A
last analyzed

Complexity

Conditions 1
Paths 1

Size

Total Lines 5
Code Lines 3

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
dl 0
loc 5
c 0
b 0
f 0
rs 9.4285
cc 1
eloc 3
nc 1
nop 1
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<?php
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/**
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 * Jaeger
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 *
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 * @copyright	Copyright (c) 2015-2016, mithra62
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 * @link		http://jaeger-app.com
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 * @version		1.0
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 * @filesource 	./Validate/AbstractRule.php
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 */
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namespace JaegerApp\Validate;
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use JaegerApp\Validate\RuleInterface;
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use JaegerApp\Exceptions\ValidateException;
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/**
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 * Jaeger - Abstract Validation Rule
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 *
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 * Contains useful helper methods for the validators
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 *
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 * @package Validate
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 * @author Eric Lamb <[email protected]>
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 */
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abstract class AbstractRule implements RuleInterface
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{
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    /**
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     * The shortname of the rule
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     * Must be unique!
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     * 
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     * @var string
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     */
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    protected $name = '';
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    /**
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     * The error template
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     * 
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     * @var string
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     */
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    protected $error_message = '';
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    /**
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     * The name of the test file for upload testing
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     * 
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     * @var string
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     */
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    protected $test_file = 'test.txt';
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    /**
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     * The content the test file should contain for comparison testing
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     * 
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     * @var string
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     */
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    protected $test_string = 'm62';
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    /**
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     * Returns the path to the test file
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     */
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    protected function getTestFilePath()
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    {
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        return realpath(dirname(__FILE__) . '/' . $this->test_file);
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    }
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    /**
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     * (non-PHPdoc)
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     * 
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     * @ignore
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     *
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     * @see \mithra62\Validate\RuleInterface::getErrorMessage()
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     */
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    public function getErrorMessage()
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    {
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        if ($this->error_message == '') {
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            throw new ValidateException('Error Message is empty!');
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        }
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        return $this->error_message;
0 ignored issues
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Bug Best Practice introduced by
The return type of return $this->error_message; (string) is incompatible with the return type declared by the interface JaegerApp\Validate\RuleInterface::getErrorMessage of type array.

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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    }
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    /**
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     * Sets the error message for the rule
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     * 
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     * @param string $message            
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     * @return RuleInterface
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     */
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    public function setErrorMessage($message)
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    {
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        $this->error_message = $message;
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        return $this;
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    }
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    /**
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     * Sets the name parameter
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     * 
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     * @param string $name            
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     * @return RuleInterface
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     */
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    public function setName($name)
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    {
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        $this->name = $name;
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        return $this;
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    }
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    /**
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     * (non-PHPdoc)
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     * 
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     * @ignore
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     *
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     * @see \mithra62\Validate\RuleInterface::getName()
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     */
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    public function getName()
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    {
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        if ($this->name == '') {
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            throw new ValidateException('Rule name is empty!');
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        }
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        return $this->name;
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    }
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}