Viewing file:  db_prefs.php (12.32 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
<?php
/**
* db_prefs.php
*
* This contains functions for manipulating user preferences
* stored in a database, accessed though the Pear DB layer.
*
* Database:
*
* The preferences table should have three columns:
* user char \ primary
* prefkey char / key
* prefval blob
*
* CREATE TABLE userprefs (user CHAR(128) NOT NULL DEFAULT '',
* prefkey CHAR(64) NOT NULL DEFAULT '',
* prefval BLOB NOT NULL DEFAULT '',
* primary key (user,prefkey));
*
* Configuration of databasename, username and password is done
* by using conf.pl or the administrator plugin
*
* @copyright 1999-2010 The SquirrelMail Project Team
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
* @version $Id: db_prefs.php 13962 2010-07-21 07:05:29Z pdontthink $
* @package squirrelmail
* @subpackage prefs
* @since 1.1.3
*/
/** Unknown database */
define('SMDB_UNKNOWN', 0);
/** MySQL */
define('SMDB_MYSQL', 1);
/** PostgreSQL */
define('SMDB_PGSQL', 2);
if (!include_once('DB.php')) {
// same error also in abook_database.php
require_once(SM_PATH . 'functions/display_messages.php');
$error = _("Could not include PEAR database functions required for the database backend.") . "<br />\n";
$error .= sprintf(_("Is PEAR installed, and is the include path set correctly to find %s?"),
'<tt>DB.php</tt>') . "<br />\n";
$error .= _("Please contact your system administrator and report this error.");
error_box($error, $color);
exit;
}
global $prefs_are_cached, $prefs_cache;
/**
* @ignore
*/
function cachePrefValues($username) {
global $prefs_are_cached, $prefs_cache;
sqgetGlobalVar('prefs_are_cached', $prefs_are_cached, SQ_SESSION );
if ($prefs_are_cached) {
sqgetGlobalVar('prefs_cache', $prefs_cache, SQ_SESSION );
return;
}
sqsession_unregister('prefs_cache');
sqsession_unregister('prefs_are_cached');
$db = new dbPrefs;
if(isset($db->error)) {
printf( _("Preference database error (%s). Exiting abnormally"),
$db->error);
exit;
}
$db->fillPrefsCache($username);
if (isset($db->error)) {
printf( _("Preference database error (%s). Exiting abnormally"),
$db->error);
exit;
}
$prefs_are_cached = true;
sqsession_register($prefs_cache, 'prefs_cache');
sqsession_register($prefs_are_cached, 'prefs_are_cached');
}
/**
* Completely undocumented class - someone document it!
* @package squirrelmail
*/
class dbPrefs {
var $table = 'userprefs';
var $user_field = 'user';
var $key_field = 'prefkey';
var $val_field = 'prefval';
var $dbh = NULL;
var $error = NULL;
var $db_type = SMDB_UNKNOWN;
var $default = Array('theme_default' => 0,
'show_html_default' => '0');
function open() {
global $prefs_dsn, $prefs_table;
global $prefs_user_field, $prefs_key_field, $prefs_val_field;
if(isset($this->dbh)) {
return true;
}
if (preg_match('/^mysql/', $prefs_dsn)) {
$this->db_type = SMDB_MYSQL;
} elseif (preg_match('/^pgsql/', $prefs_dsn)) {
$this->db_type = SMDB_PGSQL;
}
if (!empty($prefs_table)) {
$this->table = $prefs_table;
}
if (!empty($prefs_user_field)) {
$this->user_field = $prefs_user_field;
}
// the default user field is "user", which in PostgreSQL
// is an identifier and causes errors if not escaped
//
if ($this->db_type == SMDB_PGSQL) {
$this->user_field = '"' . $this->user_field . '"';
}
if (!empty($prefs_key_field)) {
$this->key_field = $prefs_key_field;
}
if (!empty($prefs_val_field)) {
$this->val_field = $prefs_val_field;
}
$dbh = DB::connect($prefs_dsn, true);
if(DB::isError($dbh)) {
$this->error = DB::errorMessage($dbh);
return false;
}
$this->dbh = $dbh;
return true;
}
function failQuery($res = NULL) {
if($res == NULL) {
printf(_("Preference database error (%s). Exiting abnormally"),
$this->error);
} else {
printf(_("Preference database error (%s). Exiting abnormally"),
DB::errorMessage($res));
}
exit;
}
function getKey($user, $key, $default = '') {
global $prefs_cache;
$result = do_hook_function('get_pref_override', array($user, $key));
//FIXME: testing below for !$result means that a plugin cannot fetch its own pref value of 0, '0', '', FALSE, or anything else that evaluates to boolean FALSE.
if (!$result) {
cachePrefValues($user);
if (isset($prefs_cache[$key])) {
$result = $prefs_cache[$key];
} else {
//FIXME: is there justification for having these TWO hooks so close together? who uses these?
$result = do_hook_function('get_pref', array($user, $key));
//FIXME: testing below for !$result means that a plugin cannot fetch its own pref value of 0, '0', '', FALSE, or anything else that evaluates to boolean FALSE.
if (!$result) {
if (isset($this->default[$key])) {
$result = $this->default[$key];
} else {
$result = $default;
}
}
}
}
return $result;
}
function deleteKey($user, $key) {
global $prefs_cache;
if (!$this->open()) {
return false;
}
$query = sprintf("DELETE FROM %s WHERE %s='%s' AND %s='%s'",
$this->table,
$this->user_field,
$this->dbh->quoteString($user),
$this->key_field,
$this->dbh->quoteString($key));
$res = $this->dbh->simpleQuery($query);
if(DB::isError($res)) {
$this->failQuery($res);
}
unset($prefs_cache[$key]);
return true;
}
function setKey($user, $key, $value) {
if (!$this->open()) {
return false;
}
if ($this->db_type == SMDB_MYSQL) {
$query = sprintf("REPLACE INTO %s (%s, %s, %s) ".
"VALUES('%s','%s','%s')",
$this->table,
$this->user_field,
$this->key_field,
$this->val_field,
$this->dbh->quoteString($user),
$this->dbh->quoteString($key),
$this->dbh->quoteString($value));
$res = $this->dbh->simpleQuery($query);
if(DB::isError($res)) {
$this->failQuery($res);
}
} elseif ($this->db_type == SMDB_PGSQL) {
$this->dbh->simpleQuery("BEGIN TRANSACTION");
$query = sprintf("DELETE FROM %s WHERE %s='%s' AND %s='%s'",
$this->table,
$this->user_field,
$this->dbh->quoteString($user),
$this->key_field,
$this->dbh->quoteString($key));
$res = $this->dbh->simpleQuery($query);
if (DB::isError($res)) {
$this->dbh->simpleQuery("ROLLBACK TRANSACTION");
$this->failQuery($res);
}
$query = sprintf("INSERT INTO %s (%s, %s, %s) VALUES ('%s', '%s', '%s')",
$this->table,
$this->user_field,
$this->key_field,
$this->val_field,
$this->dbh->quoteString($user),
$this->dbh->quoteString($key),
$this->dbh->quoteString($value));
$res = $this->dbh->simpleQuery($query);
if (DB::isError($res)) {
$this->dbh->simpleQuery("ROLLBACK TRANSACTION");
$this->failQuery($res);
}
$this->dbh->simpleQuery("COMMIT TRANSACTION");
} else {
$query = sprintf("DELETE FROM %s WHERE %s='%s' AND %s='%s'",
$this->table,
$this->user_field,
$this->dbh->quoteString($user),
$this->key_field,
$this->dbh->quoteString($key));
$res = $this->dbh->simpleQuery($query);
if (DB::isError($res)) {
$this->failQuery($res);
}
$query = sprintf("INSERT INTO %s (%s, %s, %s) VALUES ('%s', '%s', '%s')",
$this->table,
$this->user_field,
$this->key_field,
$this->val_field,
$this->dbh->quoteString($user),
$this->dbh->quoteString($key),
$this->dbh->quoteString($value));
$res = $this->dbh->simpleQuery($query);
if (DB::isError($res)) {
$this->failQuery($res);
}
}
return true;
}
function fillPrefsCache($user) {
global $prefs_cache;
if (!$this->open()) {
return;
}
$prefs_cache = array();
$query = sprintf("SELECT %s as prefkey, %s as prefval FROM %s ".
"WHERE %s = '%s'",
$this->key_field,
$this->val_field,
$this->table,
$this->user_field,
$this->dbh->quoteString($user));
$res = $this->dbh->query($query);
if (DB::isError($res)) {
$this->failQuery($res);
}
while ($row = $res->fetchRow(DB_FETCHMODE_ASSOC)) {
$prefs_cache[$row['prefkey']] = $row['prefval'];
}
}
} /* end class dbPrefs */
/**
* returns the value for the pref $string
* @ignore
*/
function getPref($data_dir, $username, $string, $default = '') {
$db = new dbPrefs;
if(isset($db->error)) {
printf( _("Preference database error (%s). Exiting abnormally"),
$db->error);
exit;
}
return $db->getKey($username, $string, $default);
}
/**
* Remove the pref $string
* @ignore
*/
function removePref($data_dir, $username, $string) {
global $prefs_cache;
$db = new dbPrefs;
if(isset($db->error)) {
$db->failQuery();
}
$db->deleteKey($username, $string);
if (isset($prefs_cache[$string])) {
unset($prefs_cache[$string]);
}
sqsession_register($prefs_cache , 'prefs_cache');
return;
}
/**
* sets the pref, $string, to $set_to
* @ignore
*/
function setPref($data_dir, $username, $string, $set_to) {
global $prefs_cache;
if (isset($prefs_cache[$string]) && ($prefs_cache[$string] == $set_to)) {
return;
}
if ($set_to === '') {
removePref($data_dir, $username, $string);
return;
}
$db = new dbPrefs;
if(isset($db->error)) {
$db->failQuery();
}
$db->setKey($username, $string, $set_to);
$prefs_cache[$string] = $set_to;
assert_options(ASSERT_ACTIVE, 1);
assert_options(ASSERT_BAIL, 1);
assert ('$set_to == $prefs_cache[$string]');
sqsession_register($prefs_cache , 'prefs_cache');
return;
}
/**
* This checks if the prefs are available
* @ignore
*/
function checkForPrefs($data_dir, $username) {
$db = new dbPrefs;
if(isset($db->error)) {
$db->failQuery();
}
}
/**
* Writes the Signature
* @ignore
*/
function setSig($data_dir, $username, $number, $string) {
if ($number == "g") {
$key = '___signature___';
} else {
$key = sprintf('___sig%s___', $number);
}
setPref($data_dir, $username, $key, $string);
return;
}
/**
* Gets the signature
* @ignore
*/
function getSig($data_dir, $username, $number) {
if ($number == "g") {
$key = '___signature___';
} else {
$key = sprintf('___sig%d___', $number);
}
return getPref($data_dir, $username, $key);
}
|