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<?php |
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namespace SilverStripe\ShareDraftContent\Extensions; |
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use SilverStripe\Control\Controller; |
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use SilverStripe\Control\Director; |
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use SilverStripe\Core\Config\Config; |
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use SilverStripe\ORM\DataExtension; |
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use SilverStripe\Security\RandomGenerator; |
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use SilverStripe\ShareDraftContent\Models\ShareToken; |
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/** |
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* @mixin SiteTree |
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*/ |
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class ShareDraftContentSiteTreeExtension extends DataExtension |
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{ |
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/** |
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* The number of days a shared link should be valid for, before expiring. |
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* |
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* @config |
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* |
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* @var int |
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*/ |
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private static $valid_for_days = 30; |
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/** |
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* @var array |
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*/ |
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private static $db = array( |
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'ShareTokenSalt' => 'Varchar(16)', |
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); |
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/** |
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* @var array |
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*/ |
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private static $has_many = array( |
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'ShareTokens' => ShareToken::class, |
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); |
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/** |
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* @var array |
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*/ |
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private static $allowed_actions = array( |
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'MakeShareDraftLink' |
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); |
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/** |
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* @return string |
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*/ |
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public function ShareTokenLink() |
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{ |
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$shareToken = $this->getNewShareToken(); |
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return Controller::join_links( |
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Director::absoluteBaseURL(), |
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'preview', |
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$this->generateKey($shareToken->Token), |
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$shareToken->Token |
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); |
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} |
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/** |
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* @return ShareToken |
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*/ |
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protected function getNewShareToken() |
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{ |
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if (!$this->owner->ShareTokenSalt) { |
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$this->owner->ShareTokenSalt = $this->getNewToken(); |
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$this->owner->write(); |
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} |
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$found = null; |
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$token = null; |
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$tries = 1; |
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$limit = 5; |
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while (!$found && ($tries++ < $limit)) { |
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$token = $this->getNewToken(); |
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$found = ShareToken::get()->filter(array( |
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"Token" => $token, |
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"PageID" => $this->owner->ID, |
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))->first(); |
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} |
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$config = Config::forClass(__CLASS__); |
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$validForDays = $config->valid_for_days; |
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$token = ShareToken::create(array( |
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"Token" => $token, |
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"ValidForDays" => $validForDays, |
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"PageID" => $this->owner->ID, |
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)); |
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$token->write(); |
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return $token; |
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} |
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/** |
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* @return string |
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*/ |
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protected function getNewToken() |
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{ |
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$generator = new RandomGenerator(); |
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return substr($generator->randomToken('sha256'), 0, 16); |
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} |
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/** |
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* @param string $salt |
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* |
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* @return string |
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*/ |
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public function generateKey($salt) |
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{ |
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return hash_pbkdf2('sha256', $salt, $this->owner->SharedTokenSalt, 1000, 16); |
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} |
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/** |
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* @return string |
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*/ |
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public function getShareDraftLinkAction() |
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{ |
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return $this->owner->Link('MakeShareDraftLink'); |
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} |
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} |
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silverstripe /
silverstripe-sharedraftcontent
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