Paginator::backward() - Code Metrics - Inspection of "Merge branch 'master' into annotations" - overblog/GraphQLBundle - Measure and Improve Code Quality continuously with Scrutinizer

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by Jérémiah

created 2018-09-01 12:23 UTC

Paginator::backward() A

↳ Parent: Paginator

Complexity

Conditions	1
Paths	1

Size

Total Lines

Duplication

Lines	6
Ratio	35.29 %

Code Coverage

Tests	10
CRAP Score	1

Importance

Changes

Metric	Value
dl	6
loc	17
ccs	10
cts	10
cp	1
rs	9.7
c	0
b	0
f	0
cc	1
nc	1
nop	3
crap	1

<?php

namespace Overblog\GraphQLBundle\Relay\Connection;

use Overblog\GraphQLBundle\Definition\Argument;
use Overblog\GraphQLBundle\Relay\Connection\Output\Connection;
use Overblog\GraphQLBundle\Relay\Connection\Output\ConnectionBuilder;

class Paginator
{
    const MODE_REGULAR = false;
    const MODE_PROMISE = true;

    /** @var callable */
    private $fetcher;

    /** @var bool */
    private $promise;

    /** @var int */
    private $totalCount;

    /**
     * @param callable $fetcher
     * @param bool     $promise
     */
    public function __construct(callable $fetcher, $promise = self::MODE_REGULAR)
    {
        $this->fetcher = $fetcher;
        $this->promise = $promise;
    }

    /**
     * @param Argument     $args
     * @param int|callable $total
     * @param array        $callableArgs
     *
     * @return Connection|object A connection or a promise
     */
    public function backward($args, $total, array $callableArgs = [])
    {
        $total = $this->computeTotalCount($total, $callableArgs);
/**
 * @return array|string
 */
function returnsDifferentValues($x) {
    if ($x) {
        return 'foo';
    }

    return array();
}

$x = returnsDifferentValues($y);
if (is_array($x)) {
    // $x is an array.
}

        $args = $this->protectArgs($args);
        $limit = $args['last'];
        $offset = \max(0, ConnectionBuilder::getOffsetWithDefault($args['before'], $total) - $limit);

        $entities = \call_user_func($this->fetcher, $offset, $limit);

        return $this->handleEntities($entities, function ($entities) use ($args, $offset, $total) {

            return ConnectionBuilder::connectionFromArraySlice($entities, $args, [
                'sliceStart' => $offset,
                'arrayLength' => $total,
            ]);
        });
    }

    /**
     * @param Argument $args
     *
     * @return Connection|object A connection or a promise
     */
    public function forward($args)
    {
        $args = $this->protectArgs($args);
        $limit = $args['first'];
        $offset = ConnectionBuilder::getOffsetWithDefault($args['after'], 0);

        // If we don't have a cursor or if it's not valid, then we must not use the slice method
        if (!\is_numeric(ConnectionBuilder::cursorToOffset($args['after'])) || !$args['after']) {
            $entities = \call_user_func($this->fetcher, $offset, $limit ? $limit + 1 : $limit);

            return $this->handleEntities($entities, function ($entities) use ($args) {
                return ConnectionBuilder::connectionFromArray($entities, $args);
            });
        } else {
            $entities = \call_user_func($this->fetcher, $offset, $limit ? $limit + 2 : $limit);

            return $this->handleEntities($entities, function ($entities) use ($args, $offset) {

                return ConnectionBuilder::connectionFromArraySlice($entities, $args, [
                    'sliceStart' => $offset,
                    'arrayLength' => $offset + \count($entities),
                ]);
            });
        }
    }

    /**
     * @param Argument     $args
     * @param int|callable $total
     * @param array        $callableArgs
     *
     * @return Connection|object A connection or a promise
     */
    public function auto($args, $total, $callableArgs = [])
    {
        $args = $this->protectArgs($args);

        if ($args['last']) {
            $connection = $this->backward($args, $total, $callableArgs);
        } else {
            $connection = $this->forward($args);
        }

        if ($this->promise) {
            return $connection->then(function (Connection $connection) use ($total, $callableArgs) {
                $connection->totalCount = $this->computeTotalCount($total, $callableArgs);


                return $connection;
            });
        } else {
            $connection->totalCount = $this->computeTotalCount($total, $callableArgs);


            return $connection;
        }
    }

    /**
     * @param array|object $entities An array of entities to paginate or a promise
     * @param callable     $callback
     *
     * @return Connection|object A connection or a promise
     */
    private function handleEntities($entities, callable $callback)
    {
        if ($this->promise) {
            return $entities->then($callback);
        }

        return \call_user_func($callback, $entities);
    }

    /**
     * @param Argument|array $args
     *
     * @return Argument
     */
    private function protectArgs($args)
    {
        return $args instanceof Argument ? $args : new Argument($args);
    }

    /**
     * @param int   $total
     * @param array $callableArgs
     *
     * @return int|mixed
     */
    private function computeTotalCount($total, array $callableArgs = [])
    {
        if (null !== $this->totalCount) {
            return $this->totalCount;
        }

        $this->totalCount = \is_callable($total) ? \call_user_func_array($total, $callableArgs) : $total;

        return $this->totalCount;
    }
}


1			<?php
2
3			namespace Overblog\GraphQLBundle\Relay\Connection;
4
5			use Overblog\GraphQLBundle\Definition\Argument;
6			use Overblog\GraphQLBundle\Relay\Connection\Output\Connection;
7			use Overblog\GraphQLBundle\Relay\Connection\Output\ConnectionBuilder;
8
9			class Paginator
10			{
11			const MODE_REGULAR = false;
12			const MODE_PROMISE = true;
13
14			/** @var callable */
15			private $fetcher;
16
17			/** @var bool */
18			private $promise;
19
20			/** @var int */
21			private $totalCount;
22
23			/**
24			* @param callable $fetcher
25			* @param bool $promise
26			*/
27	14		public function __construct(callable $fetcher, $promise = self::MODE_REGULAR)
28			{
29	14		$this->fetcher = $fetcher;
30	14		$this->promise = $promise;
31	14		}
32
33			/**
34			* @param Argument $args
35			* @param int\|callable $total
36			* @param array $callableArgs
37			*
38			* @return Connection\|object A connection or a promise
39			*/
40	7		public function backward($args, $total, array $callableArgs = [])
41			{
42	7		$total = $this->computeTotalCount($total, $callableArgs);
			0 ignored issues – show Bug introduced 2017-09-13 09:45 UTC by Report Bug Copy Issue Report It seems like `$total` defined by `$this->computeTotalCount($total, $callableArgs)` on line `42` can also be of type `callable`; however, `Overblog\GraphQLBundle\R...or::computeTotalCount()` does only seem to accept `integer`, maybe add an additional type check? If a method or function can return multiple different values and unless you are sure that you only can receive a single value in this context, we recommend to add an additional type check: /** * @return array\|string */ function returnsDifferentValues($x) { if ($x) { return 'foo'; } return array(); } $x = returnsDifferentValues($y); if (is_array($x)) { // $x is an array. } If this a common case that PHP Analyzer should handle natively, please let us know by opening an issue. Loading history...
43
44	7		$args = $this->protectArgs($args);
45	7		$limit = $args['last'];
46	7		$offset = \max(0, ConnectionBuilder::getOffsetWithDefault($args['before'], $total) - $limit);
47
48	7		$entities = \call_user_func($this->fetcher, $offset, $limit);
49
50		View Code Duplication	return $this->handleEntities($entities, function ($entities) use ($args, $offset, $total) {
			0 ignored issues – show Duplication introduced 2017-01-17 10:07 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
51	7		return ConnectionBuilder::connectionFromArraySlice($entities, $args, [
52	7		'sliceStart' => $offset,
53	7		'arrayLength' => $total,
54			]);
55	7		});
56			}
57
58			/**
59			* @param Argument $args
60			*
61			* @return Connection\|object A connection or a promise
62			*/
63	7		public function forward($args)
64			{
65	7		$args = $this->protectArgs($args);
66	7		$limit = $args['first'];
67	7		$offset = ConnectionBuilder::getOffsetWithDefault($args['after'], 0);
68
69			// If we don't have a cursor or if it's not valid, then we must not use the slice method
70	7		if (!\is_numeric(ConnectionBuilder::cursorToOffset($args['after'])) \|\| !$args['after']) {
71	4		$entities = \call_user_func($this->fetcher, $offset, $limit ? $limit + 1 : $limit);
72
73			return $this->handleEntities($entities, function ($entities) use ($args) {
74	3		return ConnectionBuilder::connectionFromArray($entities, $args);
75	4		});
76			} else {
77	3		$entities = \call_user_func($this->fetcher, $offset, $limit ? $limit + 2 : $limit);
78
79		View Code Duplication	return $this->handleEntities($entities, function ($entities) use ($args, $offset) {
			0 ignored issues – show Duplication introduced 2017-01-17 10:07 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
80	3		return ConnectionBuilder::connectionFromArraySlice($entities, $args, [
81	3		'sliceStart' => $offset,
82	3		'arrayLength' => $offset + \count($entities),
83			]);
84	3		});
85			}
86			}
87
88			/**
89			* @param Argument $args
90			* @param int\|callable $total
91			* @param array $callableArgs
92			*
93			* @return Connection\|object A connection or a promise
94			*/
95	5		public function auto($args, $total, $callableArgs = [])
96			{
97	5		$args = $this->protectArgs($args);
98
99	5		if ($args['last']) {
100	3		$connection = $this->backward($args, $total, $callableArgs);
101			} else {
102	2		$connection = $this->forward($args);
103			}
104
105	5		if ($this->promise) {
106			return $connection->then(function (Connection $connection) use ($total, $callableArgs) {
107			$connection->totalCount = $this->computeTotalCount($total, $callableArgs);
			0 ignored issues – show Bug introduced 2017-09-13 09:45 UTC by Report Bug Copy Issue Report It seems like `$total` defined by parameter `$total` on line 95 can also be of type `callable`; however, `Overblog\GraphQLBundle\R...or::computeTotalCount()` does only seem to accept `integer`, maybe add an additional type check? This check looks at variables that have been passed in as parameters and are passed out again to other methods. If the outgoing method call has stricter type requirements than the method itself, an issue is raised. An additional type check may prevent trouble. Loading history...
108
109			return $connection;
110	1		});
111			} else {
112	4		$connection->totalCount = $this->computeTotalCount($total, $callableArgs);
			0 ignored issues – show Bug introduced 2017-09-13 09:45 UTC by Report Bug Copy Issue Report It seems like `$total` defined by parameter `$total` on line 95 can also be of type `callable`; however, `Overblog\GraphQLBundle\R...or::computeTotalCount()` does only seem to accept `integer`, maybe add an additional type check? This check looks at variables that have been passed in as parameters and are passed out again to other methods. If the outgoing method call has stricter type requirements than the method itself, an issue is raised. An additional type check may prevent trouble. Loading history...
113
114	4		return $connection;
115			}
116			}
117
118			/**
119			* @param array\|object $entities An array of entities to paginate or a promise
120			* @param callable $callback
121			*
122			* @return Connection\|object A connection or a promise
123			*/
124	14		private function handleEntities($entities, callable $callback)
125			{
126	14		if ($this->promise) {
127	1		return $entities->then($callback);
128			}
129
130	13		return \call_user_func($callback, $entities);
131			}
132
133			/**
134			* @param Argument\|array $args
135			*
136			* @return Argument
137			*/
138	14		private function protectArgs($args)
139			{
140	14		return $args instanceof Argument ? $args : new Argument($args);
141			}
142
143			/**
144			* @param int $total
145			* @param array $callableArgs
146			*
147			* @return int\|mixed
148			*/
149	8		private function computeTotalCount($total, array $callableArgs = [])
150			{
151	8		if (null !== $this->totalCount) {
152	3		return $this->totalCount;
153			}
154
155	8		$this->totalCount = \is_callable($total) ? \call_user_func_array($total, $callableArgs) : $total;
156
157	8		return $this->totalCount;
158			}
159			}
160

overblog / GraphQLBundle

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Paginator::backward() A

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