ConfigResolver::extractServiceName() - Code Metrics - Inspection of "EZP-25721: Warn development upfront of ConfigResol..." - ezsystems/ezpublish-kernel - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — EZP-25721 ( 7a74c3 )

by André

created 2019-05-13 06:28 UTC

ConfigResolver::extractServiceName() B

↳ Parent: ConfigResolver

Complexity

Conditions	8
Paths	5

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	8
nc	5
nop	0
dl	0
loc	21
rs	8.4444
c	0
b	0
f	0

<?php

/**
 * File containing the ConfigResolver class.
 *
 * @copyright Copyright (C) eZ Systems AS. All rights reserved.
 * @license For full copyright and license information view LICENSE file distributed with this source code.
 */
namespace eZ\Bundle\EzPublishCoreBundle\DependencyInjection\Configuration;

use eZ\Publish\Core\MVC\Symfony\Configuration\VersatileScopeInterface;
use eZ\Publish\Core\MVC\Symfony\SiteAccess;
use eZ\Publish\Core\MVC\Symfony\SiteAccess\SiteAccessAware;
use eZ\Publish\Core\MVC\Exception\ParameterNotFoundException;
use Symfony\Component\DependencyInjection\ContainerAwareInterface;
use Symfony\Component\DependencyInjection\ContainerAwareTrait;
use Symfony\Component\DependencyInjection\ContainerBuilder;

/**
 * This class will help you get settings for a specific scope.
 * This is useful to get a setting for a specific siteaccess for example.
 *
 * It will check the different scopes available for a given namespace to find the appropriate parameter.
 * To work, the dynamic setting must comply internally to the following name format : "<namespace>.<scope>.parameter.name".
 *
 * - <namespace> is the namespace for your dynamic setting. Defaults to "ezsettings", but can be anything.
 * - <scope> is basically the siteaccess name you want your parameter value to apply to.
 *   Can also be "global" for a global override.
 *   Another scope is used internally: "default". This is the generic fallback.
 *
 * The resolve scope order is the following:
 * 1. "global"
 * 2. SiteAccess name
 * 3. "default"
 */
class ConfigResolver implements VersatileScopeInterface, SiteAccessAware, ContainerAwareInterface
{
    use ContainerAwareTrait;

    const SCOPE_GLOBAL = 'global';
    const SCOPE_DEFAULT = 'default';

    const UNDEFINED_STRATEGY_EXCEPTION = 1;
    const UNDEFINED_STRATEGY_NULL = 2;

    /**
     * @var \eZ\Publish\Core\MVC\Symfony\SiteAccess
     */
    protected $siteAccess;

    /**
     * @var array Siteaccess groups, indexed by siteaccess name
     */
    protected $groupsBySiteAccess;

    /**
     * @var string
     */
    protected $defaultNamespace;

    /**
     * @var string
     */
    protected $defaultScope;

    /**
     * @var int
     */
    protected $undefinedStrategy;

    /**
     * @var string[] List of param => [services] loaded while siteAccess->matchingType was 'uninitialized'
     */
    private $tooEarlyLoadedList = [];

    /**
     * @param array $groupsBySiteAccess SiteAccess groups, indexed by siteaccess.
     * @param string $defaultNamespace The default namespace
     * @param int $undefinedStrategy Strategy to use when encountering undefined parameters.
     *                               Must be one of
     *                                  - ConfigResolver::UNDEFINED_STRATEGY_EXCEPTION (throw an exception)
     *                                  - ConfigResolver::UNDEFINED_STRATEGY_NULL (return null)
     */
    public function __construct(
        array $groupsBySiteAccess,
        $defaultNamespace,
        $undefinedStrategy = self::UNDEFINED_STRATEGY_EXCEPTION
    ) {
        $this->groupsBySiteAccess = $groupsBySiteAccess;
        $this->defaultNamespace = $defaultNamespace;
        $this->undefinedStrategy = $undefinedStrategy;
    }

    public function setSiteAccess(SiteAccess $siteAccess = null)
    {
        $this->siteAccess = $siteAccess;
    }

    /**
     * Sets the strategy to use if an undefined parameter is being asked.
     * Can be one of:
     *  - ConfigResolver::UNDEFINED_STRATEGY_EXCEPTION (throw an exception)
     *  - ConfigResolver::UNDEFINED_STRATEGY_NULL (return null).
     *
     * Defaults to ConfigResolver::UNDEFINED_STRATEGY_EXCEPTION.
     *
     * @param int $undefinedStrategy
     */
    public function setUndefinedStrategy($undefinedStrategy)
    {
        $this->undefinedStrategy = $undefinedStrategy;
    }

    /**
     * @return int
     */
    public function getUndefinedStrategy()
    {
        return $this->undefinedStrategy;
    }

    /**
     * Checks if $paramName exists in $namespace.
     *
     * @param string $paramName
     * @param string $namespace If null, the default namespace should be used.
     * @param string $scope The scope you need $paramName value for. It's typically the siteaccess name.
     *                      If null, the current siteaccess name will be used.
     *
     * @return bool
     */
    public function hasParameter($paramName, $namespace = null, $scope = null)
    {
        $namespace = $namespace ?: $this->defaultNamespace;
        $scope = $scope ?: $this->getDefaultScope();

        $defaultScopeParamName = "$namespace." . self::SCOPE_DEFAULT . ".$paramName";
        $globalScopeParamName = "$namespace." . self::SCOPE_GLOBAL . ".$paramName";
        $relativeScopeParamName = "$namespace.$scope.$paramName";

        // Relative scope, siteaccess group wise
        $groupScopeHasParam = false;
        if (isset($this->groupsBySiteAccess[$scope])) {
            foreach ($this->groupsBySiteAccess[$scope] as $groupName) {

                $groupScopeParamName = "$namespace.$groupName.$paramName";
                if ($this->container->hasParameter($groupScopeParamName)) {
                    $groupScopeHasParam = true;
                    break;
                }
            }
        }

        return
            $this->container->hasParameter($defaultScopeParamName)
            || $groupScopeHasParam
            || $this->container->hasParameter($relativeScopeParamName)
            || $this->container->hasParameter($globalScopeParamName);
    }

    /**
     * Returns value for $paramName, in $namespace.
     *
     * @param string $paramName The parameter name, without $prefix and the current scope (i.e. siteaccess name).
     * @param string $namespace Namespace for the parameter name. If null, the default namespace will be used.
     * @param string $scope The scope you need $paramName value for. It's typically the siteaccess name.
     *                      If null, the current siteaccess name will be used.
     *
     * @throws \eZ\Publish\Core\MVC\Exception\ParameterNotFoundException
     *
     * @return mixed
     */
    public function getParameter($paramName, $namespace = null, $scope = null)
    {
        if (!$this->container instanceof ContainerBuilder && $this->siteAccess->matchingType === 'uninitialized') {
            $this->tooEarlyLoadedList[$paramName][] = $this->extractServiceName();
        }

        $namespace = $namespace ?: $this->defaultNamespace;
        $scope = $scope ?: $this->getDefaultScope();
        $triedScopes = array();

        // Global scope
        $globalScopeParamName = "$namespace." . self::SCOPE_GLOBAL . ".$paramName";
        if ($this->container->hasParameter($globalScopeParamName)) {
            return $this->container->getParameter($globalScopeParamName);
        }
        $triedScopes[] = self::SCOPE_GLOBAL;
        unset($globalScopeParamName);

        // Relative scope, siteaccess wise
        $relativeScopeParamName = "$namespace.$scope.$paramName";
        if ($this->container->hasParameter($relativeScopeParamName)) {
            return $this->container->getParameter($relativeScopeParamName);
        }
        $triedScopes[] = $scope;
        unset($relativeScopeParamName);

        // Relative scope, siteaccess group wise
        if (isset($this->groupsBySiteAccess[$scope])) {
            foreach ($this->groupsBySiteAccess[$scope] as $groupName) {

                $relativeScopeParamName = "$namespace.$groupName.$paramName";
                if ($this->container->hasParameter($relativeScopeParamName)) {
                    return $this->container->getParameter($relativeScopeParamName);
                }
            }
        }

        // Default scope
        $defaultScopeParamName = "$namespace." . self::SCOPE_DEFAULT . ".$paramName";
        if ($this->container->hasParameter($defaultScopeParamName)) {
            return $this->container->getParameter($defaultScopeParamName);
        }
        $triedScopes[] = $this->defaultNamespace;
        unset($defaultScopeParamName);

        // Undefined parameter
        switch ($this->undefinedStrategy) {
            case self::UNDEFINED_STRATEGY_NULL:
                return null;

            case self::UNDEFINED_STRATEGY_EXCEPTION:
            default:
                throw new ParameterNotFoundException($paramName, $namespace, $triedScopes);
        }
    }

    /**
     * Try to extract service name that asked for a parameter using debug_backtrace().
     *
     * @return string
     */
    private function extractServiceName()
    {
        foreach (debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 10) as $t) {
            if (!isset($t['function']) || $t['function'] === 'getParameter' || $t['function'] === __FUNCTION__) {
                continue;
            }

            // Extract service name from first service matching getXXService pattern
            // We can only reverse engineer traditional service name, namspace is stripped from class name based services
            if (\strpos($t['function'], 'get') === 0 && \strpos($t['function'], 'Service') === \strlen($t['function']) -7) {
                $serviceName = \strtolower(\preg_replace('/\B([A-Z])/', '_$1', \str_replace('_', '.', \substr($t['function'], 3, -7))));
                if ($this->container->has($serviceName)) {
                    return $serviceName;
                }

                return '->' . $t['function'] . '()';
            }
        }

        return '??';
    }

    /**
     * Changes the default namespace to look parameter into.
     *
     * @param string $defaultNamespace
     */
    public function setDefaultNamespace($defaultNamespace)
    {
        $this->defaultNamespace = $defaultNamespace;
    }

    /**
     * @return string
     */
    public function getDefaultNamespace()
    {
        return $this->defaultNamespace;
    }

    public function getDefaultScope()
    {
        return $this->defaultScope ?: $this->siteAccess->name;
    }

    public function setDefaultScope($scope)
    {
        $this->defaultScope = $scope;

        // On scope change check if siteaccess has been updated so we can log warnings if there are any
        if ($this->siteAccess->matchingType !== 'uninitialized') {
            $this->logTooEarlyLoadedParams();
        }
    }

    private function logTooEarlyLoadedParams()
    {
        if (empty($this->tooEarlyLoadedList)) {
            return;
        }

        $logger = $this->container->get('logger');
        foreach ($this->tooEarlyLoadedList as $param => $services) {
            // Ideally we we would want to skip warnings for services that use dynamic settings on setters as that means
            // paramter will get update on scope change, but we don't have a way to detect that here.
            $logger->warning(sprintf(
                'ConfigResolver was used to load parameter "%s" before SiteAccess was loaded by the following services: %s. This should be avoided; '
                . 'first try to use ConfigResolver lazily in these services instead of "$dynamic_paramter$" injection, '
                . (PHP_SAPI == 'cli' ? 'if not possible make sure your commands that rely on them are lazy loaded, ' : '')
                . 'if nothing else helps try to mark service as lazy.',
                $param,
                '"' . implode($services, '", "') . '"'
            ));
        }

        $this->tooEarlyLoadedList = [];
    }
}


1		<?php
2
3		/**
4		* File containing the ConfigResolver class.
5		*
6		* @copyright Copyright (C) eZ Systems AS. All rights reserved.
7		* @license For full copyright and license information view LICENSE file distributed with this source code.
8		*/
9		namespace eZ\Bundle\EzPublishCoreBundle\DependencyInjection\Configuration;
10
11		use eZ\Publish\Core\MVC\Symfony\Configuration\VersatileScopeInterface;
12		use eZ\Publish\Core\MVC\Symfony\SiteAccess;
13		use eZ\Publish\Core\MVC\Symfony\SiteAccess\SiteAccessAware;
14		use eZ\Publish\Core\MVC\Exception\ParameterNotFoundException;
15		use Symfony\Component\DependencyInjection\ContainerAwareInterface;
16		use Symfony\Component\DependencyInjection\ContainerAwareTrait;
17		use Symfony\Component\DependencyInjection\ContainerBuilder;
18
19		/**
20		* This class will help you get settings for a specific scope.
21		* This is useful to get a setting for a specific siteaccess for example.
22		*
23		* It will check the different scopes available for a given namespace to find the appropriate parameter.
24		* To work, the dynamic setting must comply internally to the following name format : "<namespace>.<scope>.parameter.name".
25		*
26		* - <namespace> is the namespace for your dynamic setting. Defaults to "ezsettings", but can be anything.
27		* - <scope> is basically the siteaccess name you want your parameter value to apply to.
28		* Can also be "global" for a global override.
29		* Another scope is used internally: "default". This is the generic fallback.
30		*
31		* The resolve scope order is the following:
32		* 1. "global"
33		* 2. SiteAccess name
34		* 3. "default"
35		*/
36		class ConfigResolver implements VersatileScopeInterface, SiteAccessAware, ContainerAwareInterface
37		{
38		use ContainerAwareTrait;
39
40		const SCOPE_GLOBAL = 'global';
41		const SCOPE_DEFAULT = 'default';
42
43		const UNDEFINED_STRATEGY_EXCEPTION = 1;
44		const UNDEFINED_STRATEGY_NULL = 2;
45
46		/**
47		* @var \eZ\Publish\Core\MVC\Symfony\SiteAccess
48		*/
49		protected $siteAccess;
50
51		/**
52		* @var array Siteaccess groups, indexed by siteaccess name
53		*/
54		protected $groupsBySiteAccess;
55
56		/**
57		* @var string
58		*/
59		protected $defaultNamespace;
60
61		/**
62		* @var string
63		*/
64		protected $defaultScope;
65
66		/**
67		* @var int
68		*/
69		protected $undefinedStrategy;
70
71		/**
72		* @var string[] List of param => [services] loaded while siteAccess->matchingType was 'uninitialized'
73		*/
74		private $tooEarlyLoadedList = [];
75
76		/**
77		* @param array $groupsBySiteAccess SiteAccess groups, indexed by siteaccess.
78		* @param string $defaultNamespace The default namespace
79		* @param int $undefinedStrategy Strategy to use when encountering undefined parameters.
80		* Must be one of
81		* - ConfigResolver::UNDEFINED_STRATEGY_EXCEPTION (throw an exception)
82		* - ConfigResolver::UNDEFINED_STRATEGY_NULL (return null)
83		*/
84		public function __construct(
85		array $groupsBySiteAccess,
86		$defaultNamespace,
87		$undefinedStrategy = self::UNDEFINED_STRATEGY_EXCEPTION
88		) {
89		$this->groupsBySiteAccess = $groupsBySiteAccess;
90		$this->defaultNamespace = $defaultNamespace;
91		$this->undefinedStrategy = $undefinedStrategy;
92		}
93
94		public function setSiteAccess(SiteAccess $siteAccess = null)
95		{
96		$this->siteAccess = $siteAccess;
97		}
98
99		/**
100		* Sets the strategy to use if an undefined parameter is being asked.
101		* Can be one of:
102		* - ConfigResolver::UNDEFINED_STRATEGY_EXCEPTION (throw an exception)
103		* - ConfigResolver::UNDEFINED_STRATEGY_NULL (return null).
104		*
105		* Defaults to ConfigResolver::UNDEFINED_STRATEGY_EXCEPTION.
106		*
107		* @param int $undefinedStrategy
108		*/
109		public function setUndefinedStrategy($undefinedStrategy)
110		{
111		$this->undefinedStrategy = $undefinedStrategy;
112		}
113
114		/**
115		* @return int
116		*/
117		public function getUndefinedStrategy()
118		{
119		return $this->undefinedStrategy;
120		}
121
122		/**
123		* Checks if $paramName exists in $namespace.
124		*
125		* @param string $paramName
126		* @param string $namespace If null, the default namespace should be used.
127		* @param string $scope The scope you need $paramName value for. It's typically the siteaccess name.
128		* If null, the current siteaccess name will be used.
129		*
130		* @return bool
131		*/
132		public function hasParameter($paramName, $namespace = null, $scope = null)
133		{
134		$namespace = $namespace ?: $this->defaultNamespace;
135		$scope = $scope ?: $this->getDefaultScope();
136
137		$defaultScopeParamName = "$namespace." . self::SCOPE_DEFAULT . ".$paramName";
138		$globalScopeParamName = "$namespace." . self::SCOPE_GLOBAL . ".$paramName";
139		$relativeScopeParamName = "$namespace.$scope.$paramName";
140
141		// Relative scope, siteaccess group wise
142		$groupScopeHasParam = false;
143		if (isset($this->groupsBySiteAccess[$scope])) {
144	View Code Duplication	foreach ($this->groupsBySiteAccess[$scope] as $groupName) {
		0 ignored issues – show Duplication introduced 2015-11-21 14:37 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...
145		$groupScopeParamName = "$namespace.$groupName.$paramName";
146		if ($this->container->hasParameter($groupScopeParamName)) {
147		$groupScopeHasParam = true;
148		break;
149		}
150		}
151		}
152
153		return
154		$this->container->hasParameter($defaultScopeParamName)
155		\|\| $groupScopeHasParam
156		\|\| $this->container->hasParameter($relativeScopeParamName)
157		\|\| $this->container->hasParameter($globalScopeParamName);
158		}
159
160		/**
161		* Returns value for $paramName, in $namespace.
162		*
163		* @param string $paramName The parameter name, without $prefix and the current scope (i.e. siteaccess name).
164		* @param string $namespace Namespace for the parameter name. If null, the default namespace will be used.
165		* @param string $scope The scope you need $paramName value for. It's typically the siteaccess name.
166		* If null, the current siteaccess name will be used.
167		*
168		* @throws \eZ\Publish\Core\MVC\Exception\ParameterNotFoundException
169		*
170		* @return mixed
171		*/
172		public function getParameter($paramName, $namespace = null, $scope = null)
173		{
174		if (!$this->container instanceof ContainerBuilder && $this->siteAccess->matchingType === 'uninitialized') {
175		$this->tooEarlyLoadedList[$paramName][] = $this->extractServiceName();
176		}
177
178		$namespace = $namespace ?: $this->defaultNamespace;
179		$scope = $scope ?: $this->getDefaultScope();
180		$triedScopes = array();
181
182		// Global scope
183		$globalScopeParamName = "$namespace." . self::SCOPE_GLOBAL . ".$paramName";
184		if ($this->container->hasParameter($globalScopeParamName)) {
185		return $this->container->getParameter($globalScopeParamName);
186		}
187		$triedScopes[] = self::SCOPE_GLOBAL;
188		unset($globalScopeParamName);
189
190		// Relative scope, siteaccess wise
191		$relativeScopeParamName = "$namespace.$scope.$paramName";
192		if ($this->container->hasParameter($relativeScopeParamName)) {
193		return $this->container->getParameter($relativeScopeParamName);
194		}
195		$triedScopes[] = $scope;
196		unset($relativeScopeParamName);
197
198		// Relative scope, siteaccess group wise
199		if (isset($this->groupsBySiteAccess[$scope])) {
200	View Code Duplication	foreach ($this->groupsBySiteAccess[$scope] as $groupName) {
		0 ignored issues – show Duplication introduced 2015-11-21 14:37 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...
201		$relativeScopeParamName = "$namespace.$groupName.$paramName";
202		if ($this->container->hasParameter($relativeScopeParamName)) {
203		return $this->container->getParameter($relativeScopeParamName);
204		}
205		}
206		}
207
208		// Default scope
209		$defaultScopeParamName = "$namespace." . self::SCOPE_DEFAULT . ".$paramName";
210		if ($this->container->hasParameter($defaultScopeParamName)) {
211		return $this->container->getParameter($defaultScopeParamName);
212		}
213		$triedScopes[] = $this->defaultNamespace;
214		unset($defaultScopeParamName);
215
216		// Undefined parameter
217		switch ($this->undefinedStrategy) {
218		case self::UNDEFINED_STRATEGY_NULL:
219		return null;
220
221		case self::UNDEFINED_STRATEGY_EXCEPTION:
222		default:
223		throw new ParameterNotFoundException($paramName, $namespace, $triedScopes);
224		}
225		}
226
227		/**
228		* Try to extract service name that asked for a parameter using debug_backtrace().
229		*
230		* @return string
231		*/
232		private function extractServiceName()
233		{
234		foreach (debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 10) as $t) {
235		if (!isset($t['function']) \|\| $t['function'] === 'getParameter' \|\| $t['function'] === __FUNCTION__) {
236		continue;
237		}
238
239		// Extract service name from first service matching getXXService pattern
240		// We can only reverse engineer traditional service name, namspace is stripped from class name based services
241		if (\strpos($t['function'], 'get') === 0 && \strpos($t['function'], 'Service') === \strlen($t['function']) -7) {
242		$serviceName = \strtolower(\preg_replace('/\B([A-Z])/', '_$1', \str_replace('_', '.', \substr($t['function'], 3, -7))));
243		if ($this->container->has($serviceName)) {
244		return $serviceName;
245		}
246
247		return '->' . $t['function'] . '()';
248		}
249		}
250
251		return '??';
252		}
253
254		/**
255		* Changes the default namespace to look parameter into.
256		*
257		* @param string $defaultNamespace
258		*/
259		public function setDefaultNamespace($defaultNamespace)
260		{
261		$this->defaultNamespace = $defaultNamespace;
262		}
263
264		/**
265		* @return string
266		*/
267		public function getDefaultNamespace()
268		{
269		return $this->defaultNamespace;
270		}
271
272		public function getDefaultScope()
273		{
274		return $this->defaultScope ?: $this->siteAccess->name;
275		}
276
277		public function setDefaultScope($scope)
278		{
279		$this->defaultScope = $scope;
280
281		// On scope change check if siteaccess has been updated so we can log warnings if there are any
282		if ($this->siteAccess->matchingType !== 'uninitialized') {
283		$this->logTooEarlyLoadedParams();
284		}
285		}
286
287		private function logTooEarlyLoadedParams()
288		{
289		if (empty($this->tooEarlyLoadedList)) {
290		return;
291		}
292
293		$logger = $this->container->get('logger');
294		foreach ($this->tooEarlyLoadedList as $param => $services) {
295		// Ideally we we would want to skip warnings for services that use dynamic settings on setters as that means
296		// paramter will get update on scope change, but we don't have a way to detect that here.
297		$logger->warning(sprintf(
298		'ConfigResolver was used to load parameter "%s" before SiteAccess was loaded by the following services: %s. This should be avoided; '
299		. 'first try to use ConfigResolver lazily in these services instead of "$dynamic_paramter$" injection, '
300		. (PHP_SAPI == 'cli' ? 'if not possible make sure your commands that rely on them are lazy loaded, ' : '')
301		. 'if nothing else helps try to mark service as lazy.',
302		$param,
303		'"' . implode($services, '", "') . '"'
304		));
305		}
306
307		$this->tooEarlyLoadedList = [];
308		}
309		}
310

ezsystems / ezpublish-kernel

Push — EZP-25721 ( 7a74c3 )

ConfigResolver::extractServiceName() B

Complexity

Size

Duplication

Importance

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