CouponSheetAbstract::isExpired()   A
last analyzed

Complexity

Conditions 3
Paths 2

Size

Total Lines 8

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 5
CRAP Score 3

Importance

Changes 0
Metric Value
dl 0
loc 8
ccs 5
cts 5
cp 1
rs 10
c 0
b 0
f 0
cc 3
nc 2
nop 0
crap 3
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<?php
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namespace Germania\Coupons;
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class CouponSheetAbstract implements CouponSheetInterface
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{
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    /**
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     * @var int|string
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     */
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    public $id;
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    /**
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     * @var int|string
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     */
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    public $quantity;
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    /**
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     * @var string
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     */
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    public $slug;
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    /**
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     * @var string
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     */
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    public $name;
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    /**
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     * @var DateTime|null
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     */
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    public $valid_from;
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    /**
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     * @var DateTime|null
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     */
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    public $valid_until;
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    /**
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     * @var string
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     */
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    public $coupons;
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    /**
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     * @return int
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     * @implements CouponSheetInterface
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     */
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    public function getId() {
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        return $this->id;
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    }
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    /**
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     * @return int
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     * @implements CouponSheetInterface
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     */
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    public function getQuantity() {
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        return $this->quantity;
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    }
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    /**
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     * @return string
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     * @implements CouponSheetInterface
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     */
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    public function getSlug(){
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        return $this->slug;
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    }
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    /**
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     * @return string
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     * @implements CouponSheetInterface
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     */
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    public function getName() {
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        return $this->name;
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    }
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    /**
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     * @return DateTime
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     * @implements CouponSheetInterface
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     */
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    public function getValidFrom() {
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        return $this->valid_from;
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    }
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    /**
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     * @return DateTime
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     * @implements CouponSheetInterface
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     */
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    public function getValidUntil() {
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        return $this->valid_until;
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    }
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    /**
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     * @return CouponInterface[]
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     * @implements CouponSheetInterface
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     */
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    public function getCoupons() {
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        return $this->coupons;
0 ignored issues
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Bug Best Practice introduced by
The return type of return $this->coupons; (string) is incompatible with the return type declared by the interface Germania\Coupons\CouponSheetInterface::getCoupons of type Germania\Coupons\CouponInterface[].

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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     * @return bool
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     * @implements ValidCouponInterface
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     */
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    public function isValid()
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    {
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        if (!$valid_from = $this->getValidFrom()
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        or  !$valid_from instanceOf \DateTimeInterface )
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            return false;
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        // is valid_from in future?
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        if ( time() < $valid_from->getTimestamp())
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            return false;
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        // So there's only to check if expired.
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        return !$this->isExpired();
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    }
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    /**
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     * @return bool
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     * @implements ValidCouponInterface
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     */
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    public function isExpired()
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    {
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        if (!$valid_until = $this->getValidUntil()
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        or  !$valid_until instanceOf \DateTimeInterface)
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            return false;
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        return (time() > $valid_until->getTimestamp() );
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    }
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}
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