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<?php
/**
* Filesystem Attachments
*
* This plugin which provides database backed storage for temporary
* attachment file handling. The primary advantage of this plugin
* is its compatibility with round-robin dns multi-server roundcube
* installations.
*
* This plugin relies on the core filesystem_attachments plugin
*
* @author Ziba Scott <ziba@umich.edu>
*
*/
require_once('plugins/filesystem_attachments/filesystem_attachments.php');
class database_attachments extends filesystem_attachments
{
// A prefix for the cache key used in the session and in the key field of the cache table
private $cache_prefix = "db_attach";
/**
* Helper method to generate a unique key for the given attachment file
*/
private function _key($filepath)
{
return $this->cache_prefix.md5(mktime().$filepath.$_SESSION['user_id']);
}
/**
* Save a newly uploaded attachment
*/
function upload($args)
{
$args['status'] = false;
$rcmail = rcmail::get_instance();
$key = $this->_key($args['path']);
$data = base64_encode(file_get_contents($args['path']));
$status = $rcmail->db->query(
"INSERT INTO ".get_table_name('cache')."
(created, user_id, cache_key, data)
VALUES (".$rcmail->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['status'] = false;
$rcmail = rcmail::get_instance();
$key = $this->_key($args['name']);
if ($args['path'])
$args['data'] = file_get_contents($args['path']);
$data = base64_encode($args['data']);
$status = $rcmail->db->query(
"INSERT INTO ".get_table_name('cache')."
(created, user_id, cache_key, data)
VALUES (".$rcmail->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;
$rcmail = rcmail::get_instance();
$status = $rcmail->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 $args;
}
/**
* When composing an html message, image attachments may be shown
* For this plugin, $this->get_attachment will check the file and
* return it's contents
*/
function display($args)
{
return $this->get_attachment($args);
}
/**
* When displaying or sending the attachment the file contents are fetched
* using this method. This is also called by the display_attachment hook.
*/
function get_attachment($args)
{
$rcmail = rcmail::get_instance();
$sql_result = $rcmail->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 = $rcmail->db->fetch_assoc($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)
{
$rcmail = rcmail::get_instance();
$rcmail->db->query(
"DELETE FROM ".get_table_name('cache')."
WHERE user_id=?
AND cache_key like '{$this->cache_prefix}%'",
$_SESSION['user_id']);
}
}
|
