SimpleQueryProvider::getResourceSet() - Code Metrics - Inspection of "Merge pull request #77 from CyberiaResurrection/Po..." - Algo-Web/POData - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — master ( 492d83...a726fe )

by Alex

created 2017-05-19 03:39 UTC

SimpleQueryProvider::getResourceSet() C

↳ Parent: SimpleQueryProvider

Complexity

Conditions	12
Paths	104

Size

Total Lines	43
Code Lines	31

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	43
rs	5.0933
c	0
b	0
f	0
cc	12
eloc	31
nc	104
nop	6

How to fix Complexity

<?php

namespace POData\Providers\Query;

use POData\Providers\Expression\MySQLExpressionProvider;
use POData\Providers\Metadata\ResourceProperty;
use POData\Providers\Metadata\ResourceSet;
use POData\UriProcessor\QueryProcessor\ExpressionParser\FilterInfo;
use POData\UriProcessor\QueryProcessor\OrderByParser\InternalOrderByInfo;
use POData\UriProcessor\ResourcePathProcessor\SegmentParser\KeyDescriptor;

abstract class SimpleQueryProvider implements IQueryProvider
{
    /**
     * @var Connection
     */
    protected $db;

    public function __construct($db)
    {
        $this->db = $db;
    }

    /**
     * Query all data from DB.
     *
     * @param string     $sql        SQL query
     * @param array|null $parameters Parameters for SQL query
     *
     * @return array[]|null Array of associated arrays (column name => column value)
     */
    abstract protected function queryAll($sql, $parameters = null);

    /**
     * Query one value from DB.
     *
     * @param string     $sql        SQL query
     * @param array|null $parameters Parameters for SQL query
     *
     * @return mixed Value
     */
    abstract protected function queryScalar($sql, $parameters = null);

    /* Stubbed Implementaiton Here */
    public function getQueryProvider()
    {
        return new QueryProvider();
    }

    public function handlesOrderedPaging()
    {
        return true;
    }

    public function getExpressionProvider()
    {
        return new MySQLExpressionProvider();
    }

    /**
     * Get entity name by class name.
     *
     * @param string $entityClassName Class name
     *
     * @return string Entity name
     */
    protected function getEntityName($entityClassName)
    {
        preg_match_all('/\\\([a-zA-Z]+)/', $entityClassName, $matches);
        if (!empty($matches[1])) {
            return $matches[1][count($matches[1]) - 1];
        }

        return $entityClassName;
    }

    /**
     * Get table name by entity name.
     *
     * @param string $entityName Entity name
     *
     * @return string Table name
     */
    protected function getTableName($entityName)
    {
        $tableName = $entityName;
        preg_match_all('/[A-Z][a-z]+/', $entityName, $matches);
        if (!empty($matches[0])) {
            $tableName = implode('_', $matches[0]);
        }

        return strtolower($tableName);
    }

    /**
     * Get part of SQL query with ORDER BY condition.
     *
     * @param InternalOrderByInfo $orderBy Order by condition
     *
     * @return string ORDER BY condition
     */
    protected function getOrderByExpressionAsString(InternalOrderByInfo $orderBy)
    {
        $result = '';
        foreach ($orderBy->getOrderByInfo()->getOrderByPathSegments() as $order) {
            foreach ($order->getSubPathSegments() as $subOrder) {
                $result .= $result ? ', ' : '';
                $result .= $subOrder->getName();
                $result .= $order->isAscending() ? ' ASC' : ' DESC';
            }
        }

        return $result;
    }

    /**
     * Common method for getResourceFromRelatedResourceSet() and getResourceFromResourceSet().
     *
     * @param KeyDescriptor|null $keyDescriptor
     */
    protected function getResource(
        ResourceSet $resourceSet,
        $keyDescriptor,
        array $whereCondition = []
    ) {
        $where = '';
        $parameters = [];
        $index = 0;
        if ($keyDescriptor) {
            foreach ($keyDescriptor->getValidatedNamedValues() as $key => $value) {
                ++$index;
                //Keys have already been validated, so this is not a SQL injection surface
                $where .= $where ? ' AND ' : '';
                $where .= $key . ' = :param' . $index;
                $parameters[':param' . $index] = $value[0];
            }
        }
        foreach ($whereCondition as $fieldName => $fieldValue) {
            ++$index;
            $where .= $where ? ' AND ' : '';
            $where .= $fieldName . ' = :param' . $index;
            $parameters[':param' . $index] = $fieldValue;
        }
        $where = $where ? ' WHERE ' . $where : '';
        $entityClassName = $resourceSet->getResourceType()->getInstanceType()->name;
        $entityName = $this->getEntityName($entityClassName);
        $sql = 'SELECT * FROM ' . $this->getTableName($entityName) . $where . ' LIMIT 1';
        $result = $this->queryAll($sql, $parameters);
        if ($result) {
            $result = $result[0];
        }

        return $entityClassName::fromRecord($result);
    }

    /**
     * For queries like http://localhost/NorthWind.svc/Customers.
     */
    public function getResourceSet(
        QueryType $queryType,
        ResourceSet $resourceSet,
        $filterInfo = null,
        $orderBy = null,
        $top = null,
        $skip = null
    ) {
        $result = new QueryResult();
        $entityClassName = $resourceSet->getResourceType()->getInstanceType()->name;
        $entityName = $this->getEntityName($entityClassName);
        $tableName = $this->getTableName($entityName);
        $option = null;
        if ($queryType == QueryType::ENTITIES_WITH_COUNT()) {
if (rand(1, 6) > 3) {
//print "Check failed";
} else {
    print "Check succeeded";
}
            //tell mysql we want to know the count prior to the LIMIT
            //$option = 'SQL_CALC_FOUND_ROWS';

        }
        $where = $filterInfo ? ' WHERE ' . $filterInfo->getExpressionAsString() : '';
        $order = $orderBy ? ' ORDER BY ' . $this->getOrderByExpressionAsString($orderBy) : '';
        $sqlCount = 'SELECT COUNT(*) FROM ' . $tableName . $where;
        if ($queryType == QueryType::ENTITIES() || $queryType == QueryType::ENTITIES_WITH_COUNT()) {
            $sql = 'SELECT ' . $option . ' * FROM ' . $tableName . $where . $order
                    .($top ? ' LIMIT ' . $top : '') . ($skip ? ' OFFSET ' . $skip : '');
            $data = $this->queryAll($sql);

            if ($queryType == QueryType::ENTITIES_WITH_COUNT()) {
                //get those found rows
                //$result->count = $this->queryScalar('SELECT FOUND_ROWS()');

                $result->count = $this->queryScalar($sqlCount);
            }
            $result->results = array_map($entityClassName . '::fromRecord', $data);
        } elseif ($queryType == QueryType::COUNT()) {
            $top = null !== $top ? intval($top) : $top;
            $skip = null !== $skip ? intval($skip) : $skip;
            $result->count = QueryResult::adjustCountForPaging(
class Id
{
    public $id;

    public function __construct($id)
    {
        $this->id = $id;
    }

}

class Account
{
    /** @var  Id $id */
    public $id;
}

$account_id = false;

if (starsAreRight()) {
    $account_id = new Id(42);
}

$account = new Account();
if ($account instanceof Id)
{
    $account->id = $account_id;
}
                $this->queryScalar($sqlCount),
                $top,
                $skip
            );
        }

        return $result;
    }

    /**
     * For queries like http://localhost/NorthWind.svc/Customers(‘ALFKI’).
     */
    public function getResourceFromResourceSet(
        ResourceSet $resourceSet,
        KeyDescriptor $keyDescriptor
    ) {
        return $this->getResource($resourceSet, $keyDescriptor);
    }

    /**
     * For queries like http://localhost/NorthWind.svc/Customers(‘ALFKI’)/Orders.
     */
    public function getRelatedResourceSet(
        QueryType $queryType,
        ResourceSet $sourceResourceSet,
        $sourceEntityInstance,
        ResourceSet $targetResourceSet,
        ResourceProperty $targetProperty,
        $filterInfo = null,
        $orderBy = null,
        $top = null,
        $skip = null
    ) {
        // Correct filter
        $srcClass = get_class($sourceEntityInstance);
        $filterFieldName = $this->getTableName($this->getEntityName($srcClass)) . '_id';
        $navigationPropertiesUsedInTheFilterClause = null;
        $filterExpAsDataSourceExp = '';
        if ($filterInfo) {
            $navigationPropertiesUsedInTheFilterClause = $filterInfo->getNavigationPropertiesUsed();
            $filterExpAsDataSourceExp = $filterInfo->getExpressionAsString();
        }
        $filterExpAsDataSourceExp .= $filterExpAsDataSourceExp ? ' AND ' : '';
        $filterExpAsDataSourceExp .= $filterFieldName . ' = ' . $sourceEntityInstance->id;
        $completeFilterInfo = new FilterInfo($navigationPropertiesUsedInTheFilterClause, $filterExpAsDataSourceExp);
/**
 * @return array|string
 */
function returnsDifferentValues($x) {
    if ($x) {
        return 'foo';
    }

    return array();
}

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

        return $this->getResourceSet($queryType, $targetResourceSet, $completeFilterInfo, $orderBy, $top, $skip);
    }

    /**
     * For queries like http://localhost/NorthWind.svc/Customers(‘ALFKI’)/Orders(10643).
     */
    public function getResourceFromRelatedResourceSet(

        ResourceSet $sourceResourceSet,
        $sourceEntityInstance,
        ResourceSet $targetResourceSet,
        ResourceProperty $targetProperty,
        KeyDescriptor $keyDescriptor
    ) {
        $entityClassName = $sourceResourceSet->getResourceType()->getInstanceType()->name;
        $entityName = $this->getEntityName($entityClassName);
        $fieldName = $this->getTableName($entityName) . '_id';

        return $this->getResource($targetResourceSet, $keyDescriptor, [
            $fieldName => $sourceEntityInstance->id,
        ]);
    }

    /**
     * For queries like http://localhost/NorthWind.svc/Orders(10643)/Customer.
     */
    public function getRelatedResourceReference(

        ResourceSet $sourceResourceSet,
        $sourceEntityInstance,
        ResourceSet $targetResourceSet,
        ResourceProperty $targetProperty
    ) {
        $entityClassName = $targetResourceSet->getResourceType()->getInstanceType()->name;
        $entityName = $this->getEntityName($entityClassName);
        $fieldName = $this->getTableName($entityName) . '_id';

        return $this->getResource($targetResourceSet, null, [
            'id' => $sourceEntityInstance->$fieldName,
        ]);
    }
}


1		<?php
2
3		namespace POData\Providers\Query;
4
5		use POData\Providers\Expression\MySQLExpressionProvider;
6		use POData\Providers\Metadata\ResourceProperty;
7		use POData\Providers\Metadata\ResourceSet;
8		use POData\UriProcessor\QueryProcessor\ExpressionParser\FilterInfo;
9		use POData\UriProcessor\QueryProcessor\OrderByParser\InternalOrderByInfo;
10		use POData\UriProcessor\ResourcePathProcessor\SegmentParser\KeyDescriptor;
11
12		abstract class SimpleQueryProvider implements IQueryProvider
13		{
14		/**
15		* @var Connection
16		*/
17		protected $db;
18
19		public function __construct($db)
20		{
21		$this->db = $db;
22		}
23
24		/**
25		* Query all data from DB.
26		*
27		* @param string $sql SQL query
28		* @param array\|null $parameters Parameters for SQL query
29		*
30		* @return array[]\|null Array of associated arrays (column name => column value)
31		*/
32		abstract protected function queryAll($sql, $parameters = null);
33
34		/**
35		* Query one value from DB.
36		*
37		* @param string $sql SQL query
38		* @param array\|null $parameters Parameters for SQL query
39		*
40		* @return mixed Value
41		*/
42		abstract protected function queryScalar($sql, $parameters = null);
43
44		/* Stubbed Implementaiton Here */
45		public function getQueryProvider()
46		{
47		return new QueryProvider();
48		}
49
50		public function handlesOrderedPaging()
51		{
52		return true;
53		}
54
55		public function getExpressionProvider()
56		{
57		return new MySQLExpressionProvider();
58		}
59
60		/**
61		* Get entity name by class name.
62		*
63		* @param string $entityClassName Class name
64		*
65		* @return string Entity name
66		*/
67		protected function getEntityName($entityClassName)
68		{
69		preg_match_all('/\\\([a-zA-Z]+)/', $entityClassName, $matches);
70		if (!empty($matches[1])) {
71		return $matches[1][count($matches[1]) - 1];
72		}
73
74		return $entityClassName;
75		}
76
77		/**
78		* Get table name by entity name.
79		*
80		* @param string $entityName Entity name
81		*
82		* @return string Table name
83		*/
84		protected function getTableName($entityName)
85		{
86		$tableName = $entityName;
87		preg_match_all('/[A-Z][a-z]+/', $entityName, $matches);
88		if (!empty($matches[0])) {
89		$tableName = implode('_', $matches[0]);
90		}
91
92		return strtolower($tableName);
93		}
94
95		/**
96		* Get part of SQL query with ORDER BY condition.
97		*
98		* @param InternalOrderByInfo $orderBy Order by condition
99		*
100		* @return string ORDER BY condition
101		*/
102		protected function getOrderByExpressionAsString(InternalOrderByInfo $orderBy)
103		{
104		$result = '';
105		foreach ($orderBy->getOrderByInfo()->getOrderByPathSegments() as $order) {
106		foreach ($order->getSubPathSegments() as $subOrder) {
107		$result .= $result ? ', ' : '';
108		$result .= $subOrder->getName();
109		$result .= $order->isAscending() ? ' ASC' : ' DESC';
110		}
111		}
112
113		return $result;
114		}
115
116		/**
117		* Common method for getResourceFromRelatedResourceSet() and getResourceFromResourceSet().
118		*
119		* @param KeyDescriptor\|null $keyDescriptor
120		*/
121		protected function getResource(
122		ResourceSet $resourceSet,
123		$keyDescriptor,
124		array $whereCondition = []
125		) {
126		$where = '';
127		$parameters = [];
128		$index = 0;
129		if ($keyDescriptor) {
130		foreach ($keyDescriptor->getValidatedNamedValues() as $key => $value) {
131		++$index;
132		//Keys have already been validated, so this is not a SQL injection surface
133		$where .= $where ? ' AND ' : '';
134		$where .= $key . ' = :param' . $index;
135		$parameters[':param' . $index] = $value[0];
136		}
137		}
138		foreach ($whereCondition as $fieldName => $fieldValue) {
139		++$index;
140		$where .= $where ? ' AND ' : '';
141		$where .= $fieldName . ' = :param' . $index;
142		$parameters[':param' . $index] = $fieldValue;
143		}
144		$where = $where ? ' WHERE ' . $where : '';
145		$entityClassName = $resourceSet->getResourceType()->getInstanceType()->name;
146		$entityName = $this->getEntityName($entityClassName);
147		$sql = 'SELECT * FROM ' . $this->getTableName($entityName) . $where . ' LIMIT 1';
148		$result = $this->queryAll($sql, $parameters);
149		if ($result) {
150		$result = $result[0];
151		}
152
153		return $entityClassName::fromRecord($result);
154		}
155
156		/**
157		* For queries like http://localhost/NorthWind.svc/Customers.
158		*/
159		public function getResourceSet(
160		QueryType $queryType,
161		ResourceSet $resourceSet,
162		$filterInfo = null,
163		$orderBy = null,
164		$top = null,
165		$skip = null
166		) {
167		$result = new QueryResult();
168		$entityClassName = $resourceSet->getResourceType()->getInstanceType()->name;
169		$entityName = $this->getEntityName($entityClassName);
170		$tableName = $this->getTableName($entityName);
171		$option = null;
172		if ($queryType == QueryType::ENTITIES_WITH_COUNT()) {
		0 ignored issues – show Unused Code introduced 2016-11-04 10:20 UTC by Report Bug Copy Issue Report This `if` statement is empty and can be removed. This check looks for the bodies of `if` statements that have no statements or where all statements have been commented out. This may be the result of changes for debugging or the code may simply be obsolete. These `if` bodies can be removed. If you have an empty if but statements in the `else` branch, consider inverting the condition. if (rand(1, 6) > 3) { //print "Check failed"; } else { print "Check succeeded"; } could be turned into if (rand(1, 6) <= 3) { print "Check succeeded"; } This is much more concise to read. Loading history...
173		//tell mysql we want to know the count prior to the LIMIT
174		//$option = 'SQL_CALC_FOUND_ROWS';
		0 ignored issues – show Unused Code Comprehensibility introduced 2016-11-04 10:20 UTC by Report Bug Copy Issue Report `50%` of this comment could be valid code. Did you maybe forget this after debugging? Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it. The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production. This check looks for comments that seem to be mostly valid code and reports them. Loading history...
175		}
176		$where = $filterInfo ? ' WHERE ' . $filterInfo->getExpressionAsString() : '';
177		$order = $orderBy ? ' ORDER BY ' . $this->getOrderByExpressionAsString($orderBy) : '';
178		$sqlCount = 'SELECT COUNT(*) FROM ' . $tableName . $where;
179		if ($queryType == QueryType::ENTITIES() \|\| $queryType == QueryType::ENTITIES_WITH_COUNT()) {
180		$sql = 'SELECT ' . $option . ' * FROM ' . $tableName . $where . $order
181		.($top ? ' LIMIT ' . $top : '') . ($skip ? ' OFFSET ' . $skip : '');
182		$data = $this->queryAll($sql);
183
184		if ($queryType == QueryType::ENTITIES_WITH_COUNT()) {
185		//get those found rows
186		//$result->count = $this->queryScalar('SELECT FOUND_ROWS()');
		0 ignored issues – show Unused Code Comprehensibility introduced 2016-11-04 10:20 UTC by Report Bug Copy Issue Report `62%` of this comment could be valid code. Did you maybe forget this after debugging? Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it. The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production. This check looks for comments that seem to be mostly valid code and reports them. Loading history...
187		$result->count = $this->queryScalar($sqlCount);
188		}
189		$result->results = array_map($entityClassName . '::fromRecord', $data);
190		} elseif ($queryType == QueryType::COUNT()) {
191		$top = null !== $top ? intval($top) : $top;
192		$skip = null !== $skip ? intval($skip) : $skip;
193		$result->count = QueryResult::adjustCountForPaging(
		0 ignored issues – show Documentation Bug introduced 2016-11-04 10:20 UTC by Report Bug Copy Issue Report It seems like `\POData\Providers\Query\...sqlCount), $top, $skip)` can also be of type `double`. However, the property `$count` is declared as type `integer\|null`. Maybe add an additional type check? Our type inference engine has found a suspicous assignment of a value to a property. This check raises an issue when a value that can be of a mixed type is assigned to a property that is type hinted more strictly. For example, imagine you have a variable `$accountId` that can either hold an Id object or false (if there is no account id yet). Your code now assigns that value to the `id` property of an instance of the `Account` class. This class holds a proper account, so the id value must no longer be false. Either this assignment is in error or a type check should be added for that assignment. class Id { public $id; public function __construct($id) { $this->id = $id; } } class Account { /** @var Id $id */ public $id; } $account_id = false; if (starsAreRight()) { $account_id = new Id(42); } $account = new Account(); if ($account instanceof Id) { $account->id = $account_id; } Loading history...
194		$this->queryScalar($sqlCount),
195		$top,
196		$skip
197		);
198		}
199
200		return $result;
201		}
202
203		/**
204		* For queries like http://localhost/NorthWind.svc/Customers(‘ALFKI’).
205		*/
206		public function getResourceFromResourceSet(
207		ResourceSet $resourceSet,
208		KeyDescriptor $keyDescriptor
209		) {
210		return $this->getResource($resourceSet, $keyDescriptor);
211		}
212
213		/**
214		* For queries like http://localhost/NorthWind.svc/Customers(‘ALFKI’)/Orders.
215		*/
216		public function getRelatedResourceSet(
217		QueryType $queryType,
218		ResourceSet $sourceResourceSet,
219		$sourceEntityInstance,
220		ResourceSet $targetResourceSet,
221		ResourceProperty $targetProperty,
222		$filterInfo = null,
223		$orderBy = null,
224		$top = null,
225		$skip = null
226		) {
227		// Correct filter
228		$srcClass = get_class($sourceEntityInstance);
229		$filterFieldName = $this->getTableName($this->getEntityName($srcClass)) . '_id';
230		$navigationPropertiesUsedInTheFilterClause = null;
231		$filterExpAsDataSourceExp = '';
232		if ($filterInfo) {
233		$navigationPropertiesUsedInTheFilterClause = $filterInfo->getNavigationPropertiesUsed();
234		$filterExpAsDataSourceExp = $filterInfo->getExpressionAsString();
235		}
236		$filterExpAsDataSourceExp .= $filterExpAsDataSourceExp ? ' AND ' : '';
237		$filterExpAsDataSourceExp .= $filterFieldName . ' = ' . $sourceEntityInstance->id;
238		$completeFilterInfo = new FilterInfo($navigationPropertiesUsedInTheFilterClause, $filterExpAsDataSourceExp);
		0 ignored issues – show Bug introduced 2016-11-04 10:20 UTC by Report Bug Copy Issue Report It seems like `$navigationPropertiesUsedInTheFilterClause` defined by `null` on line `230` can also be of type `null`; however, `POData\UriProcessor\Quer...lterInfo::__construct()` does only seem to accept `array`, 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...
239
240		return $this->getResourceSet($queryType, $targetResourceSet, $completeFilterInfo, $orderBy, $top, $skip);
241		}
242
243		/**
244		* For queries like http://localhost/NorthWind.svc/Customers(‘ALFKI’)/Orders(10643).
245		*/
246	View Code Duplication	public function getResourceFromRelatedResourceSet(
		0 ignored issues – show Duplication introduced 2016-11-04 10:20 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...
247		ResourceSet $sourceResourceSet,
248		$sourceEntityInstance,
249		ResourceSet $targetResourceSet,
250		ResourceProperty $targetProperty,
251		KeyDescriptor $keyDescriptor
252		) {
253		$entityClassName = $sourceResourceSet->getResourceType()->getInstanceType()->name;
254		$entityName = $this->getEntityName($entityClassName);
255		$fieldName = $this->getTableName($entityName) . '_id';
256
257		return $this->getResource($targetResourceSet, $keyDescriptor, [
258		$fieldName => $sourceEntityInstance->id,
259		]);
260		}
261
262		/**
263		* For queries like http://localhost/NorthWind.svc/Orders(10643)/Customer.
264		*/
265	View Code Duplication	public function getRelatedResourceReference(
		0 ignored issues – show Duplication introduced 2016-11-04 10:20 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...
266		ResourceSet $sourceResourceSet,
267		$sourceEntityInstance,
268		ResourceSet $targetResourceSet,
269		ResourceProperty $targetProperty
270		) {
271		$entityClassName = $targetResourceSet->getResourceType()->getInstanceType()->name;
272		$entityName = $this->getEntityName($entityClassName);
273		$fieldName = $this->getTableName($entityName) . '_id';
274
275		return $this->getResource($targetResourceSet, null, [
276		'id' => $sourceEntityInstance->$fieldName,
277		]);
278		}
279		}
280

Algo-Web / POData

Push — master ( 492d83...a726fe )

SimpleQueryProvider::getResourceSet() C

Complexity

Size

Duplication

Importance

How to fix Complexity

Long Method

Duplication Side-by-Side

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