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<?php
/*
+-----------------------------------------------------------------------+
| program/include/cache.inc |
| |
| This file is part of the RoundCube Webmail client |
| Copyright (C) 2005, RoundCube Dev, - Switzerland |
| Licensed under the GNU GPL |
| |
| PURPOSE: |
| Provide access to the application cache |
| |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
$Id$
*/
function rcube_read_cache($key)
{
global $DB, $CACHE_KEYS;
// query db
$sql_result = $DB->query("SELECT cache_id, data
FROM ".get_table_name('cache')."
WHERE user_id=?
AND cache_key=?",
$_SESSION['user_id'],
$key);
// get cached data
if ($sql_arr = $DB->fetch_assoc($sql_result))
{
$data = $sql_arr['data'];
$CACHE_KEYS[$key] = $sql_arr['cache_id'];
}
else
$data = FALSE;
return $data;
}
function rcube_write_cache($key, $data, $session_cache=FALSE)
{
global $DB, $CACHE_KEYS, $sess_id;
// check if we already have a cache entry for this key
if (!isset($CACHE_KEYS[$key]))
{
$sql_result = $DB->query("SELECT cache_id
FROM ".get_table_name('cache')."
WHERE user_id=?
AND cache_key=?",
$_SESSION['user_id'],
$key);
if ($sql_arr = $DB->fetch_assoc($sql_result))
$CACHE_KEYS[$key] = $sql_arr['cache_id'];
else
$CACHE_KEYS[$key] = FALSE;
}
// update existing cache record
if ($CACHE_KEYS[$key])
{
$DB->query("UPDATE ".get_table_name('cache')."
SET created=NOW(),
data=?
WHERE user_id=?
AND cache_key=?",
$data,
$_SESSION['user_id'],
$key);
}
// add new cache record
else
{
$DB->query("INSERT INTO ".get_table_name('cache')."
(created, user_id, session_id, cache_key, data)
VALUES (NOW(), ?, ?, ?, ?)",
$_SESSION['user_id'],
$session_cache ? $sess_id : 'NULL',
$key,
$data);
}
}
function rcube_clear_cache($key)
{
global $DB;
$DB->query("DELETE FROM ".get_table_name('cache')."
WHERE user_id=?
AND cache_key=?",
$_SESSION['user_id'],
$key);
}
?>
|
