203 lines
4.6 KiB
PHP
203 lines
4.6 KiB
PHP
<?php
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/**
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* PrivateBin
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*
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* a zero-knowledge paste bin
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*
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* @link https://github.com/PrivateBin/PrivateBin
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* @copyright 2012 Sébastien SAUVAGE (sebsauvage.net)
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* @license https://www.opensource.org/licenses/zlib-license.php The zlib/libpng License
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* @version 1.3.5
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*/
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namespace PrivateBin\Data;
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/**
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* AbstractData
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*
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* Abstract model for PrivateBin data access, implemented as a singleton.
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*/
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abstract class AbstractData
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{
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/**
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* singleton instance
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*
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* @access protected
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* @static
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* @var AbstractData
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*/
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protected static $_instance = null;
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/**
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* enforce singleton, disable constructor
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*
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* Instantiate using {@link getInstance()}, privatebin is a singleton object.
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*
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* @access protected
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*/
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protected function __construct()
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{
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}
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/**
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* enforce singleton, disable cloning
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*
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* Instantiate using {@link getInstance()}, privatebin is a singleton object.
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*
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* @access private
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*/
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private function __clone()
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{
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}
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/**
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* get instance of singleton
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*
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* @access public
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* @static
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* @param array $options
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* @return AbstractData
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*/
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public static function getInstance(array $options)
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{
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}
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/**
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* Create a paste.
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*
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* @access public
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* @param string $pasteid
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* @param array $paste
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* @return bool
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*/
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abstract public function create($pasteid, array $paste);
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/**
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* Read a paste.
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*
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* @access public
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* @param string $pasteid
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* @return array|false
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*/
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abstract public function read($pasteid);
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/**
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* Delete a paste and its discussion.
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*
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* @access public
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* @param string $pasteid
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*/
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abstract public function delete($pasteid);
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/**
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* Test if a paste exists.
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*
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* @access public
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* @param string $pasteid
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* @return bool
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*/
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abstract public function exists($pasteid);
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/**
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* Create a comment in a paste.
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*
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* @access public
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* @param string $pasteid
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* @param string $parentid
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* @param string $commentid
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* @param array $comment
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* @return bool
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*/
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abstract public function createComment($pasteid, $parentid, $commentid, array $comment);
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/**
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* Read all comments of paste.
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*
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* @access public
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* @param string $pasteid
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* @return array
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*/
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abstract public function readComments($pasteid);
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/**
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* Test if a comment exists.
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*
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* @access public
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* @param string $pasteid
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* @param string $parentid
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* @param string $commentid
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* @return bool
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*/
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abstract public function existsComment($pasteid, $parentid, $commentid);
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/**
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* Returns up to batch size number of paste ids that have expired
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*
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* @access protected
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* @param int $batchsize
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* @return array
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*/
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abstract protected function _getExpiredPastes($batchsize);
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/**
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* Perform a purge of old pastes, at most the given batchsize is deleted.
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*
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* @access public
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* @param int $batchsize
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*/
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public function purge($batchsize)
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{
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if ($batchsize < 1) {
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return;
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}
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$pastes = $this->_getExpiredPastes($batchsize);
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if (count($pastes)) {
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foreach ($pastes as $pasteid) {
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$this->delete($pasteid);
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}
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}
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}
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/**
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* Get next free slot for comment from postdate.
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*
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* @access protected
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* @param array $comments
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* @param int|string $postdate
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* @return int|string
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*/
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protected function getOpenSlot(array &$comments, $postdate)
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{
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if (array_key_exists($postdate, $comments)) {
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$parts = explode('.', $postdate, 2);
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if (!array_key_exists(1, $parts)) {
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$parts[1] = 0;
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}
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++$parts[1];
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return $this->getOpenSlot($comments, implode('.', $parts));
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}
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return $postdate;
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}
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/**
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* Upgrade pre-version 1 pastes with attachment to version 1 format.
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*
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* @access protected
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* @static
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* @param array $paste
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* @return array
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*/
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protected static function upgradePreV1Format(array $paste)
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{
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if (array_key_exists('attachment', $paste['meta'])) {
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$paste['attachment'] = $paste['meta']['attachment'];
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unset($paste['meta']['attachment']);
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if (array_key_exists('attachmentname', $paste['meta'])) {
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$paste['attachmentname'] = $paste['meta']['attachmentname'];
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unset($paste['meta']['attachmentname']);
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}
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}
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return $paste;
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}
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}
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