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<?php |
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namespace RichanFongdasen\Varnishable\Concerns; |
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use Carbon\Carbon; |
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use Symfony\Component\HttpFoundation\Response; |
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trait ManageLastModifiedHeader |
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{ |
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/** |
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* Last modified header value. |
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* |
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* @var \Carbon\Carbon|null |
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*/ |
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protected $lastModified = null; |
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/** |
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* Add Last-Modified header to the current response. |
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* |
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* @param \Symfony\Component\HttpFoundation\Response $response |
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* |
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* @return void |
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*/ |
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protected function addLastModifiedHeader(Response $response) |
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{ |
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$lastModified = $this->getLastModifiedHeader(); |
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if ($this->getConfig('use_last_modified') && ($lastModified !== null)) { |
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$response->setLastModified($lastModified); |
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} |
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} |
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/** |
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* Disable Last-Modified header for the current response. |
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* |
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* @return void |
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*/ |
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public function disableLastModified() |
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{ |
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$this->setConfig('use_last_modified', false); |
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} |
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/** |
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* Enable Last-Modified header for the current response. |
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* |
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* @return void |
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*/ |
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public function enableLastModified() |
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{ |
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$this->setConfig('use_last_modified', true); |
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} |
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/** |
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* Get last modified header for the current response. |
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* |
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* @return \Carbon\Carbon|null |
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*/ |
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public function getLastModifiedHeader() |
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{ |
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return $this->lastModified; |
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} |
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/** |
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* Set last modified header for the current response. |
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* |
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* @param \Carbon\Carbon|string $current |
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*/ |
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public function setLastModifiedHeader($current) |
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{ |
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if (!($current instanceof Carbon)) { |
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$current = new Carbon($current); |
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} |
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if (($this->lastModified === null) || ($current->getTimestamp() > $this->lastModified->getTimestamp())) { |
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$this->lastModified = $current; |
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} |
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} |
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/** |
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* Get configuration value for a specific key. |
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* |
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* @param string $key |
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* |
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* @return mixed |
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*/ |
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abstract public function getConfig($key); |
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/** |
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* Set configuration value for a specific key. |
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* |
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* @param string $key |
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* @param mixed $value |
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* |
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* @return void |
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*/ |
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abstract public function setConfig($key, $value); |
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} |
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richan-fongdasen /
laravel-varnishable
