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|
<?php
/**
* Redundant attachments
*
* This plugin provides a redundant storage for temporary uploaded
* attachment files. They are stored in both the database backed
* as well as on the local file system.
*
* This plugin relies on the core filesystem_attachments plugin
* and combines it with the functionality of the database_attachments plugin.
*
* @author Thomas Bruederli <roundcube@gmail.com>
*
*/
require_once('plugins/filesystem_attachments/filesystem_attachments.php');
class redundant_attachments extends filesystem_attachments
{
// A prefix for the cache key used in the session and in the key field of the cache table
private $cache_prefix = "ATTACH.";
/**
* Default constructor
*/
function init()
{
parent::init();
$this->db = rcmail::get_instance()->get_dbh();
}
/**
* Helper method to generate a unique key for the given attachment file
*/
private function _key($args)
{
$uname = $args['path'] ? $args['path'] : $args['name'];
return $this->cache_prefix . $args['group'] . md5(mktime() . $uname . $_SESSION['user_id']);
}
/**
* Save a newly uploaded attachment
*/
function upload($args)
{
$args = parent::upload($args);
$key = $this->_key($args);
$data = base64_encode(file_get_contents($args['path']));
$status = $this->db->query(
"INSERT INTO ".get_table_name('cache')."
(created, user_id, cache_key, data)
VALUES (".$this->db->now().", ?, ?, ?)",
$_SESSION['user_id'],
$key,
$data);
if ($status) {
$args['id'] = $key;
$args['status'] = true;
unset($args['path']);
}
return $args;
}
/**
* Save an attachment from a non-upload source (draft or forward)
*/
function save($args)
{
$args = parent::save($args);
if ($args['path'])
$args['data'] = file_get_contents($args['path']);
$data = base64_encode($args['data']);
$key = $this->_key($args);
$status = $this->db->query(
"INSERT INTO ".get_table_name('cache')."
(created, user_id, cache_key, data)
VALUES (".$this->db->now().", ?, ?, ?)",
$_SESSION['user_id'],
$key,
$data);
if ($status) {
$args['id'] = $key;
$args['status'] = true;
}
return $args;
}
/**
* Remove an attachment from storage
* This is triggered by the remove attachment button on the compose screen
*/
function remove($args)
{
$args['status'] = false;
$status = $this->db->query(
"DELETE FROM ".get_table_name('cache')."
WHERE user_id=?
AND cache_key=?",
$_SESSION['user_id'],
$args['id']);
if ($status)
$args['status'] = true;
return parent::remove($args);
}
/**
* When composing an html message, image attachments may be shown
* For this plugin, $this->get() will check the file and
* return it's contents
*/
function display($args)
{
return $this->get($args);
}
/**
* When displaying or sending the attachment the file contents are fetched
* using this method. This is also called by the attachment_display hook.
*/
function get($args)
{
// attempt to get file from local file system
$args = parent::get($args);
if ($args['path'] && ($args['status'] = file_exists($args['path'])))
return $args;
// fetch from database if not found on FS
$sql_result = $this->db->query(
"SELECT cache_id, data
FROM ".get_table_name('cache')."
WHERE user_id=?
AND cache_key=?",
$_SESSION['user_id'],
$args['id']);
if ($sql_arr = $this->db->fetch_assoc($sql_result)) {
$args['data'] = base64_decode($sql_arr['data']);
$args['status'] = true;
}
return $args;
}
/**
* Delete all temp files associated with this user
*/
function cleanup($args)
{
$prefix = $this->cache_prefix . $args['group'];
$this->db->query(
"DELETE FROM ".get_table_name('cache')."
WHERE user_id=?
AND cache_key like '{$prefix}%'",
$_SESSION['user_id']);
parent::cleanup($args);
}
}
|
