Introduce PSR-4 autoloading

lib/data/AbstractData.php

@@ -0,0 +1,176 @@
+<?php
+/**
+ * PrivateBin
+ *
+ * a zero-knowledge paste bin
+ *
+ * @link      https://github.com/PrivateBin/PrivateBin
+ * @copyright 2012 Sébastien SAUVAGE (sebsauvage.net)
+ * @license   https://www.opensource.org/licenses/zlib-license.php The zlib/libpng License
+ * @version   0.22
+ */
+
+namespace PrivateBin\data;
+
+/**
+ * privatebin_abstract
+ *
+ * Abstract model for PrivateBin data access, implemented as a singleton.
+ */
+abstract class AbstractData
+{
+    /**
+     * singleton instance
+     *
+     * @access protected
+     * @static
+     * @var privatebin_abstract
+     */
+    protected static $_instance = null;
+
+    /**
+     * enforce singleton, disable constructor
+     *
+     * Instantiate using {@link getInstance()}, privatebin is a singleton object.
+     *
+     * @access protected
+     */
+    protected function __construct() {}
+
+    /**
+     * enforce singleton, disable cloning
+     *
+     * Instantiate using {@link getInstance()}, privatebin is a singleton object.
+     *
+     * @access private
+     */
+    private function __clone() {}
+
+    /**
+     * get instance of singleton
+     *
+     * @access public
+     * @static
+     * @param  array $options
+     * @return privatebin_abstract
+     */
+    public static function getInstance($options) {}
+
+    /**
+     * Create a paste.
+     *
+     * @access public
+     * @param  string $pasteid
+     * @param  array  $paste
+     * @return bool
+     */
+    abstract public function create($pasteid, $paste);
+
+    /**
+     * Read a paste.
+     *
+     * @access public
+     * @param  string $pasteid
+     * @return stdClass|false
+     */
+    abstract public function read($pasteid);
+
+    /**
+     * Delete a paste and its discussion.
+     *
+     * @access public
+     * @param  string $pasteid
+     * @return void
+     */
+    abstract public function delete($pasteid);
+
+    /**
+     * Test if a paste exists.
+     *
+     * @access public
+     * @param  string $pasteid
+     * @return bool
+     */
+    abstract public function exists($pasteid);
+
+    /**
+     * Create a comment in a paste.
+     *
+     * @access public
+     * @param  string $pasteid
+     * @param  string $parentid
+     * @param  string $commentid
+     * @param  array  $comment
+     * @return bool
+     */
+    abstract public function createComment($pasteid, $parentid, $commentid, $comment);
+
+    /**
+     * Read all comments of paste.
+     *
+     * @access public
+     * @param  string $pasteid
+     * @return array
+     */
+    abstract public function readComments($pasteid);
+
+    /**
+     * Test if a comment exists.
+     *
+     * @access public
+     * @param  string $pasteid
+     * @param  string $parentid
+     * @param  string $commentid
+     * @return void
+     */
+    abstract public function existsComment($pasteid, $parentid, $commentid);
+
+    /**
+     * Returns up to batch size number of paste ids that have expired
+     *
+     * @access protected
+     * @param  int $batchsize
+     * @return array
+     */
+    abstract protected function _getExpiredPastes($batchsize);
+
+    /**
+     * Perform a purge of old pastes, at most the given batchsize is deleted.
+     *
+     * @access public
+     * @param  int $batchsize
+     * @return void
+     */
+    public function purge($batchsize)
+    {
+        if ($batchsize < 1) return;
+        $pastes = $this->_getExpiredPastes($batchsize);
+        if (count($pastes))
+        {
+            foreach ($pastes as $pasteid)
+            {
+                $this->delete($pasteid);
+            }
+        }
+    }
+
+    /**
+     * Get next free slot for comment from postdate.
+     *
+     * @access public
+     * @param  array $comments
+     * @param  int|string $postdate
+     * @return int|string
+     */
+    protected function getOpenSlot(&$comments, $postdate)
+    {
+        if (array_key_exists($postdate, $comments))
+        {
+            $parts = explode('.', $postdate, 2);
+            if (!array_key_exists(1, $parts)) $parts[1] = 0;
+            ++$parts[1];
+            return $this->getOpenSlot($comments, implode('.', $parts));
+        }
+        return $postdate;
+    }
+}