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<?php |
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/** |
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* File containing the {@link Request_RefreshParams} class. |
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* @package Application Utils |
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* @subpackage Request |
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* @see Request_RefreshParams |
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*/ |
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declare(strict_types=1); |
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namespace AppUtils; |
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/** |
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* Collects request parameters that can be used to refresh |
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* a page, maintaining all parameters needed to return to |
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* the same page. |
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* |
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* @package Application Utils |
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* @subpackage Request |
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* @author Sebastian Mordziol <[email protected]> |
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*/ |
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class Request_RefreshParams implements Interface_Optionable |
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{ |
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use Traits_Optionable; |
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/** |
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* @var array<string,mixed> |
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*/ |
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private $overrides = array(); |
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/** |
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* @var Request_RefreshParams_Exclude[] |
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*/ |
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private $excludes = array(); |
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public function getDefaultOptions() : array |
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{ |
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return array( |
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'exclude-session-name' => true, |
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'exclude-quickform-submitter' => true |
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); |
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} |
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/** |
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* Whether to automatically exclude the session variable |
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* from the parameters. |
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* |
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* @param bool $exclude |
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* @return Request_RefreshParams |
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*/ |
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public function setExcludeSessionName(bool $exclude=true) : Request_RefreshParams |
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{ |
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$this->setOption('exclude-session-name', $exclude); |
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return $this; |
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} |
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/** |
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* Whether to automatically exclude the HTML_QuickForm2 |
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* request variable used to track whether a form has been |
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* submitted. |
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* |
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* @param bool $exclude |
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* @return Request_RefreshParams |
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*/ |
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public function setExcludeQuickform(bool $exclude) : Request_RefreshParams |
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{ |
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$this->setOption('exclude-quickform-submitter', $exclude); |
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return $this; |
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} |
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public function excludeParamByName(string $paramName) : Request_RefreshParams |
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{ |
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if($paramName !== '') |
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{ |
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$this->excludes[] = new Request_RefreshParams_Exclude_Name($paramName); |
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} |
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return $this; |
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} |
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/** |
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* Exclude a request using a callback function. |
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* |
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* The function gets two parameters: |
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* |
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* - The name of the request parameter |
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* - The value of the request parameter |
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* |
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* If the callback returns a boolean true, the |
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* parameter will be excluded. |
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* |
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* @param callable $callback |
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* @return Request_RefreshParams |
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*/ |
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public function excludeParamByCallback($callback) : Request_RefreshParams |
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{ |
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$this->excludes[] = new Request_RefreshParams_Exclude_Callback($callback); |
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return $this; |
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} |
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/** |
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* Excludes a request parameter by name. |
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* |
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* @param array $paramNames |
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* @return Request_RefreshParams |
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*/ |
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public function excludeParamsByName(array $paramNames) : Request_RefreshParams |
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{ |
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foreach($paramNames as $name) |
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{ |
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$this->excludeParamByName((string)$name); |
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} |
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return $this; |
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} |
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/** |
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* Overrides a parameter: even if it exists, this |
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* value will be used instead - even if it is on |
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* the list of excluded parameters. |
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* |
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* @param string $paramName |
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* @param mixed $paramValue |
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* @return Request_RefreshParams |
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*/ |
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public function overrideParam(string $paramName, $paramValue) : Request_RefreshParams |
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{ |
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$this->overrides[$paramName] = $paramValue; |
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return $this; |
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} |
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/** |
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* Overrides an array of parameters. |
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* |
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* @param array $params |
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* @return Request_RefreshParams |
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*/ |
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public function overrideParams(array $params) : Request_RefreshParams |
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{ |
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foreach($params as $name => $value) |
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{ |
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$this->overrideParam((string)$name, $value); |
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} |
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return $this; |
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} |
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/** |
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* Resolves all the parameter exclusions that should |
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* be applied to the list of parameters. This includes |
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* the manually added exclusions and the dynamic exclusions |
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* like the session name. |
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* |
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* @return Request_RefreshParams_Exclude[] |
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*/ |
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private function resolveExcludes() : array |
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{ |
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$excludes = $this->excludes; |
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$this->autoExcludeSessionName($excludes); |
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$this->autoExcludeQuickform($excludes); |
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return $excludes; |
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} |
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/** |
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* Automatically excludes the session name from the |
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* parameters, if present. |
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* |
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* @param Request_RefreshParams_Exclude[] $excludes |
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*/ |
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private function autoExcludeSessionName(array &$excludes) : void |
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{ |
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if($this->getBoolOption('exclude-session-name')) |
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{ |
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$excludes[] = new Request_RefreshParams_Exclude_Name(session_name()); |
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} |
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} |
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/** |
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* Automatically excludes the HTML_QuickForm2 submit |
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* tracking variable, when enabled. |
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* |
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* @param Request_RefreshParams_Exclude[] $excludes |
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*/ |
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private function autoExcludeQuickform(array &$excludes) : void |
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{ |
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if($this->getBoolOption('exclude-quickform-submitter')) |
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{ |
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$excludes[] = new Request_RefreshParams_Exclude_Callback(function(string $paramName) |
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{ |
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return strstr($paramName, '_qf__') !== false; |
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}); |
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} |
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} |
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/** |
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* Retrieves the list of parameters matching the |
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* current settings. |
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* |
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* @return array<string,mixed> |
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*/ |
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public function getParams() : array |
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{ |
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$params = $this->removeExcluded($_REQUEST); |
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// Note: using this loop instead of array_merge, |
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// because array_merge has weird behavior when |
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// using numeric keys. |
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foreach($this->overrides as $name => $val) |
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{ |
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$params[$name] = $val; |
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} |
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return $params; |
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} |
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/** |
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* Removes all excluded parameters from the array. |
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* |
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* @param array<string,mixed> $params |
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* @return array<string,mixed> |
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*/ |
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private function removeExcluded(array $params) : array |
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{ |
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$result = array(); |
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foreach($params as $name => $value) |
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{ |
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$name = (string)$name; |
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if(!$this->isExcluded($name, $value)) |
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{ |
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$result[$name] = $value; |
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} |
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} |
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return $result; |
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} |
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/** |
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* Checks all configured exclusions to see if the |
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* parameter should be excluded or not. |
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* |
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* @param string $paramName |
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* @param mixed $paramValue |
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* @return bool |
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*/ |
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public function isExcluded(string $paramName, $paramValue) : bool |
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{ |
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$excludes = $this->resolveExcludes(); |
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foreach($excludes as $exclude) |
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{ |
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if($exclude->isExcluded($paramName, $paramValue)) |
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{ |
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return true; |
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} |
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} |
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return false; |
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} |
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} |
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