GroupBuilder - Code Metrics - Inspection of "Add raw functions support and improve builders" - rambler-digital-solutions/hydrogen - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( b7ef6a...58a002 )

by Kirill

created 2018-09-05 02:03 UTC

GroupBuilder A

↳ Parent: Project

Complexity

Total Complexity

Size/Duplication

Total Lines	78
Duplicated Lines	0 %

Coupling/Cohesion

Components	0
Dependencies	8

Test Coverage

Coverage

80.77%

Importance

Changes

Metric	Value
wmc	10
lcom	0
cbo	8
dl	0
loc	78
ccs	21
cts	26
cp	0.8077
rs	10
c	0
b	0
f	0

4 Methods

Rating	Name	Size	Complexity
A	apply()	12	3
A	applyGroup()	4	1
A	applyWhere()	11	2
A	getInnerSelections()	16	4

<?php
/**
 * This file is part of Hydrogen package.
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
declare(strict_types=1);

namespace RDS\Hydrogen\Processor\DatabaseProcessor;

use Doctrine\ORM\Query\Expr\Andx;
use Doctrine\ORM\QueryBuilder;
use phpDocumentor\Reflection\Types\Static_;
use RDS\Hydrogen\Criteria\Criterion;
use RDS\Hydrogen\Criteria\CriterionInterface;
use RDS\Hydrogen\Criteria\WhereGroup;
use RDS\Hydrogen\Criteria\Where;
use RDS\Hydrogen\Processor\DatabaseProcessor\Common\Expression;

/**
 * Class GroupBuilder
 */
class GroupBuilder extends Builder
{
    /**
     * @var string[]|Criterion[]
     */
    protected const ALLOWED_INNER_TYPES = [
        Where::class      => 'applyWhere',
        WhereGroup::class => 'applyGroup'
    ];

    /**
     * @param QueryBuilder $builder
     * @param CriterionInterface|WhereGroup $group
     * @return iterable|null
     */
    public function apply($builder, CriterionInterface $group): ?iterable
    {
        $expression = $builder->expr()->andX();

        foreach ($this->getInnerSelections($group) as $criterion => $fn) {

            yield from $fn($builder, $expression, $criterion);
        }

        return $group->isAnd()
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.
    }
}
            ? $builder->andWhere($expression)
            : $builder->orWhere($expression);
    }

    /**
     * @param QueryBuilder $builder
     * @param Andx $context
     * @param WhereGroup $group
     * @return \Generator
     */
    protected function applyGroup(QueryBuilder $builder, Andx $context, WhereGroup $group): \Generator

    {
        return $this->apply($builder, $group);
    }

    /**
     * @param QueryBuilder $builder
     * @param Andx $context
     * @param Where $where
     * @return \Generator
     */
    protected function applyWhere(QueryBuilder $builder, Andx $context, Where $where): \Generator
    {
        $expression = new Expression($builder, $where->getOperator(), $where->getValue());
        yield from $result = $expression->create($where->getField());

        if ($where->isAnd()) {
            $context->add($result->getReturn());
        } else {
            $builder->orWhere($result->getReturn());
        }
    }

    /**
     * @param WhereGroup $group
     * @return iterable|callable[]
     */
    protected function getInnerSelections(WhereGroup $group): iterable
    {
        $query = $group->getQuery();

        foreach ($query->getCriteria() as $criterion) {
            foreach (static::ALLOWED_INNER_TYPES as $typeOf => $fn) {
                if ($criterion instanceof $typeOf) {
                    yield $criterion => [$this, $fn];
                    continue 2;
                }
            }

            $error = 'Groups not allowed for %s criterion';
            throw new \LogicException(\sprintf($error, \get_class($criterion)));
        }
    }
}


1		<?php
2		/**
3		* This file is part of Hydrogen package.
4		*
5		* For the full copyright and license information, please view the LICENSE
6		* file that was distributed with this source code.
7		*/
8		declare(strict_types=1);
9
10		namespace RDS\Hydrogen\Processor\DatabaseProcessor;
11
12		use Doctrine\ORM\Query\Expr\Andx;
13		use Doctrine\ORM\QueryBuilder;
14		use phpDocumentor\Reflection\Types\Static_;
15		use RDS\Hydrogen\Criteria\Criterion;
16		use RDS\Hydrogen\Criteria\CriterionInterface;
17		use RDS\Hydrogen\Criteria\WhereGroup;
18		use RDS\Hydrogen\Criteria\Where;
19		use RDS\Hydrogen\Processor\DatabaseProcessor\Common\Expression;
20
21		/**
22		* Class GroupBuilder
23		*/
24		class GroupBuilder extends Builder
25		{
26		/**
27		* @var string[]\|Criterion[]
28		*/
29		protected const ALLOWED_INNER_TYPES = [
30		Where::class => 'applyWhere',
31		WhereGroup::class => 'applyGroup'
32		];
33
34		/**
35		* @param QueryBuilder $builder
36		* @param CriterionInterface\|WhereGroup $group
37		* @return iterable\|null
38		*/
39	2	public function apply($builder, CriterionInterface $group): ?iterable
40		{
41	2	$expression = $builder->expr()->andX();
42
43	2	foreach ($this->getInnerSelections($group) as $criterion => $fn) {
		0 ignored issues – show Compatibility introduced 2018-09-05 02:06 UTC by Report Bug Copy Issue Report `$group` of type `object<RDS\Hydrogen\Criteria\CriterionInterface>` is not a sub-type of `object<RDS\Hydrogen\Criteria\WhereGroup>`. It seems like you assume a concrete implementation of the interface `RDS\Hydrogen\Criteria\CriterionInterface` to be always present. This check looks for parameters that are defined as one type in their type hint or doc comment but seem to be used as a narrower type, i.e an implementation of an interface or a subclass. Consider changing the type of the parameter or doing an instanceof check before assuming your parameter is of the expected type. Loading history...
44	2	yield from $fn($builder, $expression, $criterion);
45		}
46
47	2	return $group->isAnd()
		0 ignored issues – show Bug introduced 2018-09-05 02:06 UTC by Report Bug Copy Issue Report It seems like you code against a concrete implementation and not the interface `RDS\Hydrogen\Criteria\CriterionInterface` as the method `isAnd()` does only exist in the following implementations of said interface: `RDS\Hydrogen\Criteria\Having`, `RDS\Hydrogen\Criteria\HavingGroup`, `RDS\Hydrogen\Criteria\Where`, `RDS\Hydrogen\Criteria\WhereGroup`. 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... Bug Best Practice introduced 2018-09-05 02:06 UTC by Report Bug Copy Issue Report The return type of `return $group->isAnd() ?...->orWhere($expression);` (`Doctrine\ORM\QueryBuilder`) is incompatible with the return type declared by the interface `RDS\Hydrogen\Processor\BuilderInterface::apply` of type `RDS\Hydrogen\Processor\iterable\|null`. 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...
48		? $builder->andWhere($expression)
49	2	: $builder->orWhere($expression);
50		}
51
52		/**
53		* @param QueryBuilder $builder
54		* @param Andx $context
55		* @param WhereGroup $group
56		* @return \Generator
57		*/
58		protected function applyGroup(QueryBuilder $builder, Andx $context, WhereGroup $group): \Generator
		0 ignored issues – show Unused Code introduced 2018-09-05 02:06 UTC by Report Bug Copy Issue Report The parameter `$context` is not used and could be removed. This check looks from parameters that have been defined for a function or method, but which are not used in the method body. Loading history...
59		{
60		return $this->apply($builder, $group);
61		}
62
63		/**
64		* @param QueryBuilder $builder
65		* @param Andx $context
66		* @param Where $where
67		* @return \Generator
68		*/
69	2	protected function applyWhere(QueryBuilder $builder, Andx $context, Where $where): \Generator
70		{
71	2	$expression = new Expression($builder, $where->getOperator(), $where->getValue());
72	2	yield from $result = $expression->create($where->getField());
73
74	2	if ($where->isAnd()) {
75	2	$context->add($result->getReturn());
76		} else {
77	2	$builder->orWhere($result->getReturn());
78		}
79	2	}
80
81		/**
82		* @param WhereGroup $group
83		* @return iterable\|callable[]
84		*/
85	2	protected function getInnerSelections(WhereGroup $group): iterable
86		{
87	2	$query = $group->getQuery();
88
89	2	foreach ($query->getCriteria() as $criterion) {
90	2	foreach (static::ALLOWED_INNER_TYPES as $typeOf => $fn) {
91	2	if ($criterion instanceof $typeOf) {
92	2	yield $criterion => [$this, $fn];
93	2	continue 2;
94		}
95		}
96
97		$error = 'Groups not allowed for %s criterion';
98		throw new \LogicException(\sprintf($error, \get_class($criterion)));
99		}
100	2	}
101		}
102

rambler-digital-solutions / hydrogen

Push — master ( b7ef6a...58a002 )

GroupBuilder A

Complexity

Size/Duplication

Coupling/Cohesion

Test Coverage

Importance

4 Methods

Available Fixes

Duplication Side-by-Side

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