GroupbyIterator::values() - Code Metrics - Inspection of "Merge pull request #34 from zicht/feature/tweak-gr..." - zicht/itertools - Measure and Improve Code Quality continuously with Scrutinizer

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created 2017-07-31 11:17 UTC

GroupbyIterator::values() A

↳ Parent: GroupbyIterator

Complexity

Conditions	3
Paths	2

Size

Total Lines	10
Code Lines	6

Duplication

Lines	10
Ratio	100 %

Code Coverage

Tests	6
CRAP Score	3

Importance

Changes

Metric	Value
cc	3
eloc	6
nc	2
nop	0
dl	10
loc	10
ccs	6
cts	6
cp	1
crap	3
rs	9.4285
c	0
b	0
f	0

<?php
/**
 * @author Boudewijn Schoon <[email protected]>
 * @copyright Zicht Online <http://zicht.nl>
 */

namespace Zicht\Itertools\lib;

use Zicht\Itertools\lib\Interfaces\FiniteIterableInterface;
use Zicht\Itertools\lib\Traits\FiniteIterableTrait;

// todo: place the two classed in their own file

/**
 * Class GroupedIterator
 *
 * @package Zicht\Itertools\lib
 */
class GroupedIterator extends \IteratorIterator implements FiniteIterableInterface
{
    use FiniteIterableTrait;

    /** @var mixed */
    protected $groupKey;

    /**
     * GroupedIterator constructor.
     *
     * @param mixed $groupKey
     */
    public function __construct($groupKey)
    {
        $this->groupKey = $groupKey;
        parent::__construct(new \ArrayIterator());
    }

    /**
     * @return mixed
     */
    public function getGroupKey()
    {
        return $this->groupKey;
    }

    /**
     * Adds an element to the iterable
     *
     * @param mixed $key
     * @param mixed $value
     */
    public function append($key, $value)
    {
        $this->getInnerIterator()->append([$key, $value]);
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
    }

    /**
     * @{inheritDoc}
     */
    public function current()
    {
        return $this->getInnerIterator()->current()[1];
    }

    /**
     * @{inheritDoc}
     */
    public function key()
    {
        return $this->getInnerIterator()->current()[0];
    }

    /**
     * @{inheritDoc}
     */
    public function count()
    {
        return iterator_count($this->getInnerIterator());
    }
}

/**
 * Class GroupbyIterator
 *
 * @package Zicht\Itertools\lib
 */
class GroupbyIterator extends \IteratorIterator implements FiniteIterableInterface

{
    use FiniteIterableTrait;

    /**
     * GroupbyIterator constructor.
     *
     * @param \Closure $func
     * @param \Iterator $iterable
     */
    public function __construct(\Closure $func, \Iterator $iterable)
    {
        // todo: this implementation pre-computes everything... this is
        // not the way an iterator should work.  Please re-write.
        $groupedIterator = null;
        $previousGroupKey = null;
        $data = [];

        foreach ($iterable as $key => $value) {
            $groupKey = call_user_func($func, $value, $key);
            if ($previousGroupKey !== $groupKey || $groupedIterator === null) {
                $previousGroupKey = $groupKey;
                $groupedIterator = new GroupedIterator($groupKey);
                $data [] = $groupedIterator;
            }
            $groupedIterator->append($key, $value);
        }

        parent::__construct(new \ArrayIterator($data));
    }

    /**
     * @{inheritDoc}
     */
    public function key()
    {
        return $this->current()->getGroupKey();
    }

    /**
     * @{inheritDoc}
     */
    public function count()
    {
        return iterator_count($this->getInnerIterator());
    }

    /**
     * @{inheritDoc}
     */
    public function toArray()
    {
        $array = iterator_to_array($this);
        array_walk(
            $array,
            function (&$value) {
                /** @var GroupedIterator $value */
                $value = $value->toArray();
            }
        );
        return $array;
    }

    /**
     * @{inheritDoc}
     */
    public function values()

    {
        $values = [];
        if ($this instanceof \Traversable) {
            foreach ($this as $key => $value) {
                $values [] = $value->values();
            }
        }
        return $values;
    }
}


1			<?php
2			/**
3			* @author Boudewijn Schoon <[email protected]>
4			* @copyright Zicht Online <http://zicht.nl>
5			*/
6
7			namespace Zicht\Itertools\lib;
8
9			use Zicht\Itertools\lib\Interfaces\FiniteIterableInterface;
10			use Zicht\Itertools\lib\Traits\FiniteIterableTrait;
11
12			// todo: place the two classed in their own file
13
14			/**
15			* Class GroupedIterator
16			*
17			* @package Zicht\Itertools\lib
18			*/
19			class GroupedIterator extends \IteratorIterator implements FiniteIterableInterface
20			{
21			use FiniteIterableTrait;
22
23			/** @var mixed */
24			protected $groupKey;
25
26			/**
27			* GroupedIterator constructor.
28			*
29			* @param mixed $groupKey
30			*/
31	18		public function __construct($groupKey)
32			{
33	18		$this->groupKey = $groupKey;
34	18		parent::__construct(new \ArrayIterator());
35	18		}
36
37			/**
38			* @return mixed
39			*/
40	16		public function getGroupKey()
41			{
42	16		return $this->groupKey;
43			}
44
45			/**
46			* Adds an element to the iterable
47			*
48			* @param mixed $key
49			* @param mixed $value
50			*/
51	18		public function append($key, $value)
52			{
53	18		$this->getInnerIterator()->append([$key, $value]);
			0 ignored issues – show Bug introduced 2017-01-12 12:49 UTC by Report Bug Copy Issue Report It seems like you code against a concrete implementation and not the interface `Iterator` as the method `append()` does only exist in the following implementations of said interface: `AppendIterator`, `ArrayIterator`, `Issue523`, `RecursiveArrayIterator`, `Zicht\Itertools\lib\ChainIterator`, `Zicht\Itertools\lib\GroupedIterator`. Let’s take a look at an example: interface User { /** @return string / public function getPassword(); } class MyUser implements User { public function getPassword() { // return something } public function getDisplayName() { // return some name. } } class AuthSystem { public function authenticate(User $user) { $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName())); // do something. } } In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break. Available Fixes Change the type-hint for the parameter: class AuthSystem { public function authenticate(MyUser $user) { / ... / } } Add an additional type-check: class AuthSystem { public function authenticate(User $user) { if ($user instanceof MyUser) { $this->logger->info(/* ... /); } // or alternatively if ( ! $user instanceof MyUser) { throw new \LogicException( '$user must be an instance of MyUser, ' .'other instances are not supported.' ); } } } Note:* PHP Analyzer uses reverse abstract interpretation to narrow down the types inside the if block in such a case. Add the method to the interface: interface User { /** @return string / public function getPassword(); /* @return string */ public function getDisplayName(); } Loading history...
54	18		}
55
56			/**
57			* @{inheritDoc}
58			*/
59	16		public function current()
60			{
61	16		return $this->getInnerIterator()->current()[1];
62			}
63
64			/**
65			* @{inheritDoc}
66			*/
67	16		public function key()
68			{
69	16		return $this->getInnerIterator()->current()[0];
70			}
71
72			/**
73			* @{inheritDoc}
74			*/
75	11		public function count()
76			{
77	11		return iterator_count($this->getInnerIterator());
78			}
79			}
80
81			/**
82			* Class GroupbyIterator
83			*
84			* @package Zicht\Itertools\lib
85			*/
86			class GroupbyIterator extends \IteratorIterator implements FiniteIterableInterface
			0 ignored issues – show Coding Style Compatibility introduced 2017-05-05 10:41 UTC by Report Bug Copy Issue Report PSR1 recommends that each class should be in its own file to aid autoloaders. Having each class in a dedicated file usually plays nice with PSR autoloaders and is therefore a well established practice. If you use other autoloaders, you might not want to follow this rule. Loading history...
87			{
88			use FiniteIterableTrait;
89
90			/**
91			* GroupbyIterator constructor.
92			*
93			* @param \Closure $func
94			* @param \Iterator $iterable
95			*/
96	18		public function __construct(\Closure $func, \Iterator $iterable)
97			{
98			// todo: this implementation pre-computes everything... this is
99			// not the way an iterator should work. Please re-write.
100	18		$groupedIterator = null;
101	18		$previousGroupKey = null;
102	18		$data = [];
103
104	18		foreach ($iterable as $key => $value) {
105	18		$groupKey = call_user_func($func, $value, $key);
106	18		if ($previousGroupKey !== $groupKey \|\| $groupedIterator === null) {
107	18		$previousGroupKey = $groupKey;
108	18		$groupedIterator = new GroupedIterator($groupKey);
109	18		$data [] = $groupedIterator;
110			}
111	18		$groupedIterator->append($key, $value);
112			}
113
114	18		parent::__construct(new \ArrayIterator($data));
115	18		}
116
117			/**
118			* @{inheritDoc}
119			*/
120	16		public function key()
121			{
122	16		return $this->current()->getGroupKey();
123			}
124
125			/**
126			* @{inheritDoc}
127			*/
128	11		public function count()
129			{
130	11		return iterator_count($this->getInnerIterator());
131			}
132
133			/**
134			* @{inheritDoc}
135			*/
136	2		public function toArray()
137			{
138	2		$array = iterator_to_array($this);
139	2		array_walk(
140			$array,
141	2		function (&$value) {
142			/** @var GroupedIterator $value */
143	2		$value = $value->toArray();
144	2		}
145			);
146	2		return $array;
147			}
148
149			/**
150			* @{inheritDoc}
151			*/
152	2	View Code Duplication	public function values()
			0 ignored issues – show Duplication introduced 2017-07-31 10:37 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
153			{
154	2		$values = [];
155	2		if ($this instanceof \Traversable) {
156	2		foreach ($this as $key => $value) {
157	2		$values [] = $value->values();
158			}
159			}
160	2		return $values;
161			}
162			}
163

zicht / itertools

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GroupbyIterator::values() A

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Duplication

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