AbstractConditionViewHelper::renderElseChild() - Code Metrics - Inspection of "[!!!] DO NOT MERGE - Fluid 3.0 diff" - TYPO3/Fluid - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#470)

by Claus

created 2019-08-25 13:26 UTC

AbstractConditionViewHelper::renderElseChild() A

↳ Parent: AbstractConditionViewHelper

Complexity

Conditions	5
Paths	5

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	5
nc	5
nop	0
dl	0
loc	19
rs	9.3222
c	0
b	0
f	0

<?php
declare(strict_types=1);
namespace TYPO3Fluid\Fluid\Core\ViewHelper;

/*
 * This file belongs to the package "TYPO3 Fluid".
 * See LICENSE.txt that was shipped with this package.
 */

use TYPO3Fluid\Fluid\Component\ComponentInterface;
use TYPO3Fluid\Fluid\ViewHelpers\ElseViewHelper;
use TYPO3Fluid\Fluid\ViewHelpers\ThenViewHelper;

/**
 * This view helper is an abstract ViewHelper which implements an if/else condition.
 *
 * = Usage =
 *
 * To create a custom Condition ViewHelper, you need to subclass this class, and
 * implement your own render() method. Inside there, you should call $this->renderThenChild()
 * if the condition evaluated to TRUE, and $this->renderElseChild() if the condition evaluated
 * to FALSE.
 *
 * Every Condition ViewHelper has a "then" and "else" argument, so it can be used like:
 * <[aConditionViewHelperName] .... then="condition true" else="condition false" />,
 * or as well use the "then" and "else" child nodes.
 *
 * @see \TYPO3Fluid\Fluid\ViewHelpers\IfViewHelper for a more detailed explanation and a simple usage example.
 * Make sure to NOT OVERRIDE the constructor.
 */
abstract class AbstractConditionViewHelper extends AbstractViewHelper
{
    protected $escapeOutput = false;

    /**
     * @return void
     */
    public function initializeArguments()
    {
        $this->registerArgument('then', 'mixed', 'Value to be returned if the condition if met.');
        $this->registerArgument('else', 'mixed', 'Value to be returned if the condition if not met.');
    }

    /**
     * Renders <f:then> child if $condition is true, otherwise renders <f:else> child.
     * Method which only gets called if the template is not compiled. For static calling,
     * the then/else nodes are converted to closures and condition evaluation closures.
     *
     * @return mixed
     */
    public function render()
    {
        if ($this->condition()) {
            return $this->renderThenChild();
        }
        return $this->renderElseChild();
    }

    /**
     * Override this method for a custom decision whether or not to render the ViewHelper
     *
     * @return bool
     */
    protected function condition(): bool
    {
        return true;
    }

    /**
     * Returns value of "then" attribute.
     * If then attribute is not set, iterates through child nodes and renders ThenViewHelper.
     * If then attribute is not set and no ThenViewHelper and no ElseViewHelper is found, all child nodes are rendered
     *
     * @return mixed rendered ThenViewHelper or contents of <f:if> if no ThenViewHelper was found
     */
    protected function renderThenChild()
    {
        if ($this->hasArgument('then')) {
            return $this->arguments['then'];
        }
        $elseViewHelperEncountered = false;
        foreach ($this->getChildren() as $childNode) {
            if ($childNode instanceof ThenViewHelper) {
                $data = $childNode->evaluate($this->renderingContext);
                return $data;
            }
            if ($childNode instanceof ElseViewHelper) {
                $elseViewHelperEncountered = true;
            }
        }

        if ($elseViewHelperEncountered) {
            return null;
        }

        return $this->evaluateChildren($this->renderingContext);
    }

    /**
     * Returns value of "else" attribute.
     * If else attribute is not set, iterates through child nodes and renders ElseViewHelper.
     * If else attribute is not set and no ElseViewHelper is found, an empty string will be returned.
     *
     * @return string rendered ElseViewHelper or an empty string if no ThenViewHelper was found
     */
    protected function renderElseChild()
    {
        if ($this->hasArgument('else')) {
            return $this->arguments['else'];
        }

        /** @var ComponentInterface|null $elseNode */
        $elseNode = null;
$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}
        foreach ($this->getChildren() as $childNode) {
            if ($childNode instanceof ElseViewHelper) {
                $conditionArgument = $childNode->getArguments()->setRenderingContext($this->renderingContext)['if'];
                if ($conditionArgument) {
                    return $childNode->evaluate($this->renderingContext);
                }
            }
        }

        return null;
    }
}


1			<?php
2			declare(strict_types=1);
3			namespace TYPO3Fluid\Fluid\Core\ViewHelper;
4
5			/*
6			* This file belongs to the package "TYPO3 Fluid".
7			* See LICENSE.txt that was shipped with this package.
8			*/
9
10			use TYPO3Fluid\Fluid\Component\ComponentInterface;
11			use TYPO3Fluid\Fluid\ViewHelpers\ElseViewHelper;
12			use TYPO3Fluid\Fluid\ViewHelpers\ThenViewHelper;
13
14			/**
15			* This view helper is an abstract ViewHelper which implements an if/else condition.
16			*
17			* = Usage =
18			*
19			* To create a custom Condition ViewHelper, you need to subclass this class, and
20			* implement your own render() method. Inside there, you should call $this->renderThenChild()
21			* if the condition evaluated to TRUE, and $this->renderElseChild() if the condition evaluated
22			* to FALSE.
23			*
24			* Every Condition ViewHelper has a "then" and "else" argument, so it can be used like:
25			* <[aConditionViewHelperName] .... then="condition true" else="condition false" />,
26			* or as well use the "then" and "else" child nodes.
27			*
28			* @see \TYPO3Fluid\Fluid\ViewHelpers\IfViewHelper for a more detailed explanation and a simple usage example.
29			* Make sure to NOT OVERRIDE the constructor.
30			*/
31			abstract class AbstractConditionViewHelper extends AbstractViewHelper
32			{
33			protected $escapeOutput = false;
34
35			/**
36			* @return void
37			*/
38			public function initializeArguments()
39			{
40			$this->registerArgument('then', 'mixed', 'Value to be returned if the condition if met.');
41			$this->registerArgument('else', 'mixed', 'Value to be returned if the condition if not met.');
42			}
43
44			/**
45			* Renders <f:then> child if $condition is true, otherwise renders <f:else> child.
46			* Method which only gets called if the template is not compiled. For static calling,
47			* the then/else nodes are converted to closures and condition evaluation closures.
48			*
49			* @return mixed
50			*/
51			public function render()
52			{
53			if ($this->condition()) {
54			return $this->renderThenChild();
55			}
56			return $this->renderElseChild();
57			}
58
59			/**
60			* Override this method for a custom decision whether or not to render the ViewHelper
61			*
62			* @return bool
63			*/
64			protected function condition(): bool
65			{
66			return true;
67			}
68
69			/**
70			* Returns value of "then" attribute.
71			* If then attribute is not set, iterates through child nodes and renders ThenViewHelper.
72			* If then attribute is not set and no ThenViewHelper and no ElseViewHelper is found, all child nodes are rendered
73			*
74			* @return mixed rendered ThenViewHelper or contents of <f:if> if no ThenViewHelper was found
75			*/
76			protected function renderThenChild()
77			{
78			if ($this->hasArgument('then')) {
79			return $this->arguments['then'];
80			}
81			$elseViewHelperEncountered = false;
82			foreach ($this->getChildren() as $childNode) {
83			if ($childNode instanceof ThenViewHelper) {
84			$data = $childNode->evaluate($this->renderingContext);
85			return $data;
86			}
87			if ($childNode instanceof ElseViewHelper) {
88			$elseViewHelperEncountered = true;
89			}
90			}
91
92			if ($elseViewHelperEncountered) {
93			return null;
94			}
95
96			return $this->evaluateChildren($this->renderingContext);
97			}
98
99			/**
100			* Returns value of "else" attribute.
101			* If else attribute is not set, iterates through child nodes and renders ElseViewHelper.
102			* If else attribute is not set and no ElseViewHelper is found, an empty string will be returned.
103			*
104			* @return string rendered ElseViewHelper or an empty string if no ThenViewHelper was found
105			*/
106			protected function renderElseChild()
107			{
108			if ($this->hasArgument('else')) {
109			return $this->arguments['else'];
110			}
111
112			/** @var ComponentInterface\|null $elseNode */
113			$elseNode = null;
			0 ignored issues – show Unused Code introduced 2019-08-07 16:29 UTC by Report Bug Copy Issue Report `$elseNode` is not used, you could remove the assignment. This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently. $myVar = 'Value'; $higher = false; if (rand(1, 6) > 3) { $higher = true; } else { $higher = false; } Both the `$myVar` assignment in line 1 and the `$higher` assignment in line 2 are dead. The first because `$myVar` is never used and the second because `$higher` is always overwritten for every possible time line. Loading history...
114			foreach ($this->getChildren() as $childNode) {
115			if ($childNode instanceof ElseViewHelper) {
116			$conditionArgument = $childNode->getArguments()->setRenderingContext($this->renderingContext)['if'];
117			if ($conditionArgument) {
118			return $childNode->evaluate($this->renderingContext);
119			}
120			}
121			}
122
123			return null;
124			}
125			}
126

TYPO3 / Fluid

Pull Request — master (#470)

AbstractConditionViewHelper::renderElseChild() A

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