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<?php |
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namespace SilverStripe\ControllerPolicy; |
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use SilverStripe\Forms\FieldList; |
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use SilverStripe\Forms\LiteralField; |
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use SilverStripe\Forms\TextField; |
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use SilverStripe\ORM\DataExtension; |
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use SilverStripe\Security\Permission; |
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use SilverStripe\Security\Security; |
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/** |
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* This extension leverages the CachingPolicy's ability to customise the max-age per originator. |
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* The configuration option is surfaced to the CMS UI. The extension needs to be added |
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* to the object related to the policed controller. |
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*/ |
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class PageControlledPolicy extends DataExtension |
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{ |
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/** |
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* @var array |
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*/ |
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private static $db = [ |
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'MaxAge' => 'Varchar' |
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]; |
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/** |
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* Extension point for the CachingPolicy. |
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* |
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* @param int $cacheAge The original cache age value (in seconds) |
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* @return int|null The new cache age value (in seconds) |
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*/ |
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public function getCacheAge($cacheAge) |
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{ |
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if ($this->owner->MaxAge != '') { |
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return (int)($this->owner->MaxAge * 60); |
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} |
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} |
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/** |
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* @param FieldList $fields |
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*/ |
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public function updateCMSFields(FieldList $fields) |
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{ |
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// Only admins are allowed to modify this. |
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$member = Security::getCurrentUser(); |
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if (!$member || !Permission::checkMember($member, 'ADMIN')) { |
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return; |
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} |
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$fields->addFieldsToTab('Root.Caching', [ |
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LiteralField::create('Instruction', '<p>The following field controls the length of time the page will ' . |
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'be cached for. You will not be able to see updates to this page for at most the specified ' . |
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'amount of minutes. Leave empty to set back to the default configured for your site. Set ' . |
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'to 0 to explicitly disable caching for this page.</p>'), |
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TextField::create('MaxAge', 'Custom cache timeout [minutes]') |
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]); |
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} |
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} |
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silverstripe /
silverstripe-controllerpolicy
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