AbstractPrice::calculateSum() - Code Metrics - Inspection of "minor" - hiqdev/php-billing - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( fdb40a...87cabe )

by Andrii

created 2017-06-08 08:53 UTC

AbstractPrice::calculateSum() A

↳ Parent: AbstractPrice

Complexity

Conditions	3
Paths	3

Size

Total Lines	14
Code Lines	8

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	6
CRAP Score	3.1406

Importance

Changes

Metric	Value
dl	0
loc	14
ccs	6
cts	8
cp	0.75
rs	9.4285
c	0
b	0
f	0
cc	3
eloc	8
nc	3
nop	1
crap	3.1406

<?php
/**
 * PHP Billing Library
 *
 * @link      https://github.com/hiqdev/php-billing
 * @package   php-billing
 * @license   BSD-3-Clause
 * @copyright Copyright (c) 2017, HiQDev (http://hiqdev.com/)
 */

namespace hiqdev\php\billing\price;

use hiqdev\php\billing\EntityInterface;
use hiqdev\php\billing\target\TargetInterface;
use hiqdev\php\billing\type\TypeInterface;
use hiqdev\php\units\QuantityInterface;

/**
 * Price.
 * @see PriceInterface
 *
 * @author Andrii Vasyliev <[email protected]>
 */
abstract class AbstractPrice implements PriceInterface, EntityInterface
{
    /**
     * @var integer
     */
    protected $id;

    /**
     * @var Type
     */
    protected $type;

    /**
     * @var Target
     */
    protected $target;

    public function __construct($id, TypeInterface $type, TargetInterface $target)
    {
        $this->id = $id;
        $this->type = $type;

        $this->target = $target;

    }

    /**
     * {@inheritdoc}
     */
    public function getType()
    {
        return $this->type;
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());
}
    }

    /**
     * {@inheritdoc}
     */
    public function getTarget()
    {
        return $this->target;
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());
}
    }

    /**
     * {@inheritdoc}
     * Default sum calculation method: sum = price * usage.
     */
    public function calculateSum(QuantityInterface $quantity)
    {
        $usage = $this->calculateUsage($quantity);
        if ($usage === null) {
            return null;
        }

        $price = $this->calculatePrice($quantity);
        if ($price === null) {
            return null;
        }

        return $price->multiply($usage->getQuantity());
    }

    public static function create(array $data)
    {
        return new SinglePrice($data['id'], $data['target']);

    }

    public function jsonSerialize()
    {
        return [
            'id' => $this->id,
            'type' => $this->type,
            'target' => $this->target,
        ];
    }

    /**
     * {@inheritdoc}
     */
    abstract public function calculateUsage(QuantityInterface $quantity);

    /**
     * {@inheritdoc}
     */
    abstract public function calculatePrice(QuantityInterface $action);
}


1		<?php
2		/**
3		* PHP Billing Library
4		*
5		* @link https://github.com/hiqdev/php-billing
6		* @package php-billing
7		* @license BSD-3-Clause
8		* @copyright Copyright (c) 2017, HiQDev (http://hiqdev.com/)
9		*/
10
11		namespace hiqdev\php\billing\price;
12
13		use hiqdev\php\billing\EntityInterface;
14		use hiqdev\php\billing\target\TargetInterface;
15		use hiqdev\php\billing\type\TypeInterface;
16		use hiqdev\php\units\QuantityInterface;
17
18		/**
19		* Price.
20		* @see PriceInterface
21		*
22		* @author Andrii Vasyliev <[email protected]>
23		*/
24		abstract class AbstractPrice implements PriceInterface, EntityInterface
25		{
26		/**
27		* @var integer
28		*/
29		protected $id;
30
31		/**
32		* @var Type
33		*/
34		protected $type;
35
36		/**
37		* @var Target
38		*/
39		protected $target;
40
41	4	public function __construct($id, TypeInterface $type, TargetInterface $target)
42		{
43	4	$this->id = $id;
44	4	$this->type = $type;
		0 ignored issues – show Documentation Bug introduced 2017-06-07 12:28 UTC by Report Bug Copy Issue Report It seems like `$type` of type `object<hiqdev\php\billing\type\TypeInterface>` is incompatible with the declared type `object<hiqdev\php\billing\price\Type>` of property `$type`. Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property. Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property.. Loading history...
45	4	$this->target = $target;
		0 ignored issues – show Documentation Bug introduced 2017-06-07 12:28 UTC by Report Bug Copy Issue Report It seems like `$target` of type `object<hiqdev\php\billing\target\TargetInterface>` is incompatible with the declared type `object<hiqdev\php\billing\price\Target>` of property `$target`. Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property. Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property.. Loading history...
46	4	}
47
48		/**
49		* {@inheritdoc}
50		*/
51	5	public function getType()
52		{
53	5	return $this->type;
		0 ignored issues – show Bug Best Practice introduced 2017-06-06 10:13 UTC by Report Bug Copy Issue Report The return type of `return $this->type;` (`hiqdev\php\billing\price\Type`) is incompatible with the return type declared by the interface `hiqdev\php\billing\price\PriceInterface::getType` of type `hiqdev\php\billing\type\TypeInterface`. 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...
54		}
55
56		/**
57		* {@inheritdoc}
58		*/
59	5	public function getTarget()
60		{
61	5	return $this->target;
		0 ignored issues – show Bug Best Practice introduced 2017-06-06 10:13 UTC by Report Bug Copy Issue Report The return type of `return $this->target;` (`hiqdev\php\billing\price\Target`) is incompatible with the return type declared by the interface `hiqdev\php\billing\price\PriceInterface::getTarget` of type `hiqdev\php\billing\target\TargetInterface`. 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...
62		}
63
64		/**
65		* {@inheritdoc}
66		* Default sum calculation method: sum = price * usage.
67		*/
68	1	public function calculateSum(QuantityInterface $quantity)
69		{
70	1	$usage = $this->calculateUsage($quantity);
71	1	if ($usage === null) {
72		return null;
73		}
74
75	1	$price = $this->calculatePrice($quantity);
76	1	if ($price === null) {
77		return null;
78		}
79
80	1	return $price->multiply($usage->getQuantity());
81		}
82
83		public static function create(array $data)
84		{
85		return new SinglePrice($data['id'], $data['target']);
		0 ignored issues – show Bug introduced 2017-06-07 12:28 UTC by Report Bug Copy Issue Report The call to `SinglePrice::__construct()` misses some required arguments starting with `$target`. Loading history...
86		}
87
88		public function jsonSerialize()
89		{
90		return [
91		'id' => $this->id,
92		'type' => $this->type,
93		'target' => $this->target,
94		];
95		}
96
97		/**
98		* {@inheritdoc}
99		*/
100		abstract public function calculateUsage(QuantityInterface $quantity);
101
102		/**
103		* {@inheritdoc}
104		*/
105		abstract public function calculatePrice(QuantityInterface $action);
106		}
107

hiqdev / php-billing

Push — master ( fdb40a...87cabe )

AbstractPrice::calculateSum() A

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