ChainRenderer::getRenderer() - Code Metrics - Inspection of "Merge pull request #12 from moufmouf/new-2.0" - thecodingmachine/html.renderer - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — 2.0 ( 1bba9f...1e5061 )

by David

created 2018-08-19 21:15 UTC

ChainRenderer::getRenderer() F

↳ Parent: ChainRenderer

Complexity

Conditions	22
Paths	209

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	62
rs	3.2208
c	0
b	0
f	0
nc	209
cc	22
nop	2

How to fix Long Method Complexity

<?php
/*
 * Copyright (c) 2013 David Negrier
 *
 * See the file LICENSE.txt for copying permission.
 */

namespace Mouf\Html\Renderer;

use Psr\Container\ContainerInterface;
use Psr\SimpleCache\CacheInterface;

/**
 * This class is a renderer that renders objects using other renderers.
 * This renderer will automatically detect the renderers to be included.
 * They must extend the ChainableRendererInterface interface.
 *
 * @author David Négrier <[email protected]>
 */
class ChainRenderer implements CanSetTemplateRendererInterface
{

    /**
     * @var ChainableRendererInterface|null
     */
    private $templateRenderer;
    /**
     * @var ChainableRendererInterface[]
     */
    private $packageRenderers = [];
    /**
     * @var ChainableRendererInterface[]
     */
    private $customRenderers = [];

    private $cacheService;

    private $initDone = false;
    /**
     * @var string[]
     */
    private $customRendererInstanceNames;
    /**
     * @var string
     */
    private $templateRendererInstanceName;
    /**
     * @var string[]
     */
    private $packageRendererInstanceNames;
    /**
     * @var string
     */
    private $uniqueName;
    /**
     * @var ContainerInterface
     */
    private $container;

    /**
     *
     * @param string[] $customRendererInstanceNames An array of names of custom renderers (container identifiers)
     * @param string[] $packageRendererInstanceNames An array of names of package renderers (container identifiers)
     * @param CacheInterface $cacheService This service is used to speed up the mapping between the object and the template.
     * @param string $uniqueName The unique name for this instance (used for caching purpose)
     */
    public function __construct(ContainerInterface $container, array $customRendererInstanceNames, array $packageRendererInstanceNames, CacheInterface $cacheService, string $uniqueName)
    {
        $this->container = $container;
        $this->customRendererInstanceNames = $customRendererInstanceNames;
        $this->packageRendererInstanceNames = $packageRendererInstanceNames;
        $this->cacheService = $cacheService;
        $this->uniqueName = $uniqueName;
    }

    /**
     * (non-PHPdoc)
     * @see \Mouf\Html\Renderer\RendererInterface::render()
     */
    public function render($object, string $context = null): void
    {
        $renderer = $this->getRenderer($object, $context);
        if ($renderer == null) {
            throw new NoRendererFoundException("Renderer not found. Unable to find renderer for object of class '".get_class($object)."'. Path tested: ".$this->getRendererDebugMessage($object, $context));
        }
        $renderer->render($object, $context);
    }

    /**
     * @param object $object
     * @param string|null $context
     * @return ChainableRendererInterface|null
     */
    private function getRenderer($object, string $context = null): ?ChainableRendererInterface
    {
        $cacheKey = "chainRendererByClass_".md5($this->uniqueName."/".$this->templateRendererInstanceName."/".get_class($object)."/".$context);

        $cachedInstanceName = $this->cacheService->get($cacheKey);
        if ($cachedInstanceName !== null) {
            return $this->container->get($cachedInstanceName);
        }

        $this->initRenderersList();

        $isCachable = true;
        $foundRenderer = null;
        $source = null;
$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}
        $foundInstanceName = null;

        do {
            foreach ($this->customRenderers as $instanceName => $renderer) {
                $result = $renderer->canRender($object, $context);
                if ($result === ChainableRendererInterface::CAN_RENDER_OBJECT || $result === ChainableRendererInterface::CANNOT_RENDER_OBJECT) {
                    $isCachable = false;
                }
                if ($result === ChainableRendererInterface::CAN_RENDER_OBJECT || $result === ChainableRendererInterface::CAN_RENDER_CLASS) {
                    $foundRenderer = $renderer;
                    $foundInstanceName = $instanceName;
                    break 2;
                }
            }

            if ($this->templateRendererInstanceName && !$this->templateRenderer) {
                $this->templateRenderer = $this->container->get($this->templateRendererInstanceName);
            }
            if ($this->templateRenderer) {
                $result = $this->templateRenderer->canRender($object, $context);
                if ($result === ChainableRendererInterface::CAN_RENDER_OBJECT || $result === ChainableRendererInterface::CANNOT_RENDER_OBJECT) {
                    $isCachable = false;
                }
                if ($result === ChainableRendererInterface::CAN_RENDER_OBJECT || $result === ChainableRendererInterface::CAN_RENDER_CLASS) {
                    $foundRenderer = $this->templateRenderer;
                    break;
                }
            }

            foreach ($this->packageRenderers as $instanceName => $renderer) {
                $result = $renderer->canRender($object, $context);
                if ($result === ChainableRendererInterface::CAN_RENDER_OBJECT || $result === ChainableRendererInterface::CANNOT_RENDER_OBJECT) {
                    $isCachable = false;
                }
                if ($result === ChainableRendererInterface::CAN_RENDER_OBJECT || $result === ChainableRendererInterface::CAN_RENDER_CLASS) {
                    $foundRenderer = $renderer;
                    $foundInstanceName = $instanceName;
                    break 2;
                }
            }
        } while (false);

        if ($isCachable && $foundRenderer) {
            $this->cacheService->set($cacheKey, $foundInstanceName);
        }

        return $foundRenderer;
    }

    /**
     * Returns a string explaining the steps done to find the renderer.
     *
     * @param  object $object
     * @param  string $context
     * @return string
     */
    private function getRendererDebugMessage($object, string $context = null): string
    {
        $debugMessage = '';

        $this->initRenderersList();

        do {
            foreach ($this->customRenderers as $renderer) {
                /* @var $renderer ChainableRendererInterface */

                $debugMessage .= $renderer->debugCanRender($object, $context);
                $result = $renderer->canRender($object, $context);
                if ($result === ChainableRendererInterface::CAN_RENDER_OBJECT || $result === ChainableRendererInterface::CAN_RENDER_CLASS) {
                    break 2;
                }
            }

            /* @var $renderer ChainableRendererInterface */
            if ($this->templateRenderer) {
                $debugMessage .= $this->templateRenderer->debugCanRender($object, $context);
                $result = $this->templateRenderer->canRender($object, $context);
                if ($result === ChainableRendererInterface::CAN_RENDER_OBJECT || $result === ChainableRendererInterface::CAN_RENDER_CLASS) {
                    break;
                }
            }

            foreach ($this->packageRenderers as $renderer) {
                /* @var $renderer ChainableRendererInterface */

                $debugMessage .= $renderer->debugCanRender($object, $context);
                $result = $renderer->canRender($object, $context);
                if ($result === ChainableRendererInterface::CAN_RENDER_OBJECT || $result === ChainableRendererInterface::CAN_RENDER_CLASS) {
                    break 2;
                }
            }
        } while (false);
        
        return $debugMessage;
    }
    
    /**
     * Initializes the renderers list (from cache if available)
     */
    private function initRenderersList(): void
    {
        if (!$this->initDone) {
            foreach ($this->customRendererInstanceNames as $instanceName) {
                $this->customRenderers[$instanceName] = $this->container->get($instanceName);
            }
            foreach ($this->packageRendererInstanceNames as $instanceName) {
                $this->packageRenderers[$instanceName] = $this->container->get($instanceName);
            }

            // Note: We ignore template renderers on purpose.
            $this->initDone = true;
        }
    }

    /**
     * Sets the renderer associated to the template.
     * There should be only one if these renderers.
     * It is the role of the template to subscribe to this renderer.
     *
     * @param string $templateRendererInstanceName The name of the template renderer in the container
     */
    public function setTemplateRendererInstanceName(string $templateRendererInstanceName): void
    {
        $this->templateRendererInstanceName = $templateRendererInstanceName;
    }
}


1			<?php
2			/*
3			* Copyright (c) 2013 David Negrier
4			*
5			* See the file LICENSE.txt for copying permission.
6			*/
7
8			namespace Mouf\Html\Renderer;
9
10			use Psr\Container\ContainerInterface;
11			use Psr\SimpleCache\CacheInterface;
12
13			/**
14			* This class is a renderer that renders objects using other renderers.
15			* This renderer will automatically detect the renderers to be included.
16			* They must extend the ChainableRendererInterface interface.
17			*
18			* @author David Négrier <[email protected]>
19			*/
20			class ChainRenderer implements CanSetTemplateRendererInterface
21			{
22
23			/**
24			* @var ChainableRendererInterface\|null
25			*/
26			private $templateRenderer;
27			/**
28			* @var ChainableRendererInterface[]
29			*/
30			private $packageRenderers = [];
31			/**
32			* @var ChainableRendererInterface[]
33			*/
34			private $customRenderers = [];
35
36			private $cacheService;
37
38			private $initDone = false;
39			/**
40			* @var string[]
41			*/
42			private $customRendererInstanceNames;
43			/**
44			* @var string
45			*/
46			private $templateRendererInstanceName;
47			/**
48			* @var string[]
49			*/
50			private $packageRendererInstanceNames;
51			/**
52			* @var string
53			*/
54			private $uniqueName;
55			/**
56			* @var ContainerInterface
57			*/
58			private $container;
59
60			/**
61			*
62			* @param string[] $customRendererInstanceNames An array of names of custom renderers (container identifiers)
63			* @param string[] $packageRendererInstanceNames An array of names of package renderers (container identifiers)
64			* @param CacheInterface $cacheService This service is used to speed up the mapping between the object and the template.
65			* @param string $uniqueName The unique name for this instance (used for caching purpose)
66			*/
67			public function __construct(ContainerInterface $container, array $customRendererInstanceNames, array $packageRendererInstanceNames, CacheInterface $cacheService, string $uniqueName)
68			{
69			$this->container = $container;
70			$this->customRendererInstanceNames = $customRendererInstanceNames;
71			$this->packageRendererInstanceNames = $packageRendererInstanceNames;
72			$this->cacheService = $cacheService;
73			$this->uniqueName = $uniqueName;
74			}
75
76			/**
77			* (non-PHPdoc)
78			* @see \Mouf\Html\Renderer\RendererInterface::render()
79			*/
80			public function render($object, string $context = null): void
81			{
82			$renderer = $this->getRenderer($object, $context);
83			if ($renderer == null) {
84			throw new NoRendererFoundException("Renderer not found. Unable to find renderer for object of class '".get_class($object)."'. Path tested: ".$this->getRendererDebugMessage($object, $context));
85			}
86			$renderer->render($object, $context);
87			}
88
89			/**
90			* @param object $object
91			* @param string\|null $context
92			* @return ChainableRendererInterface\|null
93			*/
94			private function getRenderer($object, string $context = null): ?ChainableRendererInterface
95			{
96			$cacheKey = "chainRendererByClass_".md5($this->uniqueName."/".$this->templateRendererInstanceName."/".get_class($object)."/".$context);
97
98			$cachedInstanceName = $this->cacheService->get($cacheKey);
99			if ($cachedInstanceName !== null) {
100			return $this->container->get($cachedInstanceName);
101			}
102
103			$this->initRenderersList();
104
105			$isCachable = true;
106			$foundRenderer = null;
107			$source = null;
			0 ignored issues – show Unused Code introduced 2018-08-16 21:39 UTC by Report Bug Copy Issue Report `$source` 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...
108			$foundInstanceName = null;
109
110			do {
111			foreach ($this->customRenderers as $instanceName => $renderer) {
112			$result = $renderer->canRender($object, $context);
113			if ($result === ChainableRendererInterface::CAN_RENDER_OBJECT \|\| $result === ChainableRendererInterface::CANNOT_RENDER_OBJECT) {
114			$isCachable = false;
115			}
116			if ($result === ChainableRendererInterface::CAN_RENDER_OBJECT \|\| $result === ChainableRendererInterface::CAN_RENDER_CLASS) {
117			$foundRenderer = $renderer;
118			$foundInstanceName = $instanceName;
119			break 2;
120			}
121			}
122
123			if ($this->templateRendererInstanceName && !$this->templateRenderer) {
124			$this->templateRenderer = $this->container->get($this->templateRendererInstanceName);
125			}
126			if ($this->templateRenderer) {
127			$result = $this->templateRenderer->canRender($object, $context);
128			if ($result === ChainableRendererInterface::CAN_RENDER_OBJECT \|\| $result === ChainableRendererInterface::CANNOT_RENDER_OBJECT) {
129			$isCachable = false;
130			}
131			if ($result === ChainableRendererInterface::CAN_RENDER_OBJECT \|\| $result === ChainableRendererInterface::CAN_RENDER_CLASS) {
132			$foundRenderer = $this->templateRenderer;
133			break;
134			}
135			}
136
137			foreach ($this->packageRenderers as $instanceName => $renderer) {
138			$result = $renderer->canRender($object, $context);
139			if ($result === ChainableRendererInterface::CAN_RENDER_OBJECT \|\| $result === ChainableRendererInterface::CANNOT_RENDER_OBJECT) {
140			$isCachable = false;
141			}
142			if ($result === ChainableRendererInterface::CAN_RENDER_OBJECT \|\| $result === ChainableRendererInterface::CAN_RENDER_CLASS) {
143			$foundRenderer = $renderer;
144			$foundInstanceName = $instanceName;
145			break 2;
146			}
147			}
148			} while (false);
149
150			if ($isCachable && $foundRenderer) {
151			$this->cacheService->set($cacheKey, $foundInstanceName);
152			}
153
154			return $foundRenderer;
155			}
156
157			/**
158			* Returns a string explaining the steps done to find the renderer.
159			*
160			* @param object $object
161			* @param string $context
162			* @return string
163			*/
164			private function getRendererDebugMessage($object, string $context = null): string
165			{
166			$debugMessage = '';
167
168			$this->initRenderersList();
169
170			do {
171			foreach ($this->customRenderers as $renderer) {
172			/* @var $renderer ChainableRendererInterface */
173
174			$debugMessage .= $renderer->debugCanRender($object, $context);
175			$result = $renderer->canRender($object, $context);
176			if ($result === ChainableRendererInterface::CAN_RENDER_OBJECT \|\| $result === ChainableRendererInterface::CAN_RENDER_CLASS) {
177			break 2;
178			}
179			}
180
181			/* @var $renderer ChainableRendererInterface */
182			if ($this->templateRenderer) {
183			$debugMessage .= $this->templateRenderer->debugCanRender($object, $context);
184			$result = $this->templateRenderer->canRender($object, $context);
185			if ($result === ChainableRendererInterface::CAN_RENDER_OBJECT \|\| $result === ChainableRendererInterface::CAN_RENDER_CLASS) {
186			break;
187			}
188			}
189
190			foreach ($this->packageRenderers as $renderer) {
191			/* @var $renderer ChainableRendererInterface */
192
193			$debugMessage .= $renderer->debugCanRender($object, $context);
194			$result = $renderer->canRender($object, $context);
195			if ($result === ChainableRendererInterface::CAN_RENDER_OBJECT \|\| $result === ChainableRendererInterface::CAN_RENDER_CLASS) {
196			break 2;
197			}
198			}
199			} while (false);
200
201			return $debugMessage;
202			}
203
204			/**
205			* Initializes the renderers list (from cache if available)
206			*/
207			private function initRenderersList(): void
208			{
209			if (!$this->initDone) {
210			foreach ($this->customRendererInstanceNames as $instanceName) {
211			$this->customRenderers[$instanceName] = $this->container->get($instanceName);
212			}
213			foreach ($this->packageRendererInstanceNames as $instanceName) {
214			$this->packageRenderers[$instanceName] = $this->container->get($instanceName);
215			}
216
217			// Note: We ignore template renderers on purpose.
218			$this->initDone = true;
219			}
220			}
221
222			/**
223			* Sets the renderer associated to the template.
224			* There should be only one if these renderers.
225			* It is the role of the template to subscribe to this renderer.
226			*
227			* @param string $templateRendererInstanceName The name of the template renderer in the container
228			*/
229			public function setTemplateRendererInstanceName(string $templateRendererInstanceName): void
230			{
231			$this->templateRendererInstanceName = $templateRendererInstanceName;
232			}
233			}
234

thecodingmachine / html.renderer

Push — 2.0 ( 1bba9f...1e5061 )

ChainRenderer::getRenderer() F

Complexity

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Duplication

Importance

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