<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 * Functions for displaying user preferences pages
 *
 * @package phpMyAdmin
 */

/**
 * Loads user preferences
 *
 * Returns false or an array:
 * * config_data - path => value pairs
 * * mtime - last modification time
 *
 * @uses PMA_array_merge_recursive
 * @uses PMA_backquote()
 * @uses PMA_DBI_fetch_single_row()
 * @uses PMA_getRelationsParam()
 * @uses PMA_sqlAddslashes()
 * @uses $GLOBALS['controllink']
 * @return false|array
 */
function PMA_load_userprefs()
{
    $cfgRelation = PMA_getRelationsParam();
    if (!$cfgRelation['userconfigwork']) {
        return false;
    }
    $query_table = PMA_backquote($cfgRelation['db']) . '.' . PMA_backquote($cfgRelation['userconfig']);
    $query = '
        SELECT `config_data`, UNIX_TIMESTAMP(`timevalue`) ts
        FROM ' . $query_table . '
          WHERE `username` = \'' . PMA_sqlAddslashes($cfgRelation['user']) . '\'';
    $row = PMA_DBI_fetch_single_row($query, 'ASSOC', $GLOBALS['controllink']);
    if (!$row) {
        return false;
    }
    $config_data = unserialize($row['config_data']);
    return array(
        'config_data' => $config_data,
        'mtime' => $row['ts']);
}

/**
 * Saves user preferences
 *
 * @uses $GLOBALS['controllink']
 * @uses $_SESSION['cache']['userprefs']
 * @uses ConfigFile::getConfigArray()
 * @uses ConfigFile::getInstance()
 * @uses PMA_backquote()
 * @uses PMA_DBI_fetch_value
 * @uses PMA_DBI_getError()
 * @uses PMA_DBI_try_query()
 * @uses PMA_Message::addMessage()
 * @uses PMA_Message::error()
 * @uses PMA_Message::rawError()
 * @uses PMA_sqlAddslashes()
 * @uses PMA_getRelationsParam()
 * @return true|PMA_Message
 */
function PMA_save_userprefs()
{
    $cfgRelation = PMA_getRelationsParam();
    $cf = ConfigFile::getInstance();

    $config_data = serialize($cf->getConfigArray());

    $query_table = PMA_backquote($cfgRelation['db']) . '.' . PMA_backquote($cfgRelation['userconfig']);
    $query = '
        SELECT `username`
        FROM ' . $query_table . '
          WHERE `username` = \'' . PMA_sqlAddslashes($cfgRelation['user']) . '\'';

    $has_config = PMA_DBI_fetch_value($query, 0, 0, $GLOBALS['controllink']);
    if ($has_config) {
        $query = '
            UPDATE ' . $query_table . '
            SET `config_data` = \'' . PMA_sqlAddslashes($config_data) . '\'
            WHERE `username` = \'' . PMA_sqlAddslashes($cfgRelation['user']) . '\'';
    } else {
        $query = '
            INSERT INTO ' . $query_table . ' (`username`, `config_data`)
            VALUES (\'' . PMA_sqlAddslashes($cfgRelation['user']) . '\',
                \'' . PMA_sqlAddslashes($config_data) . '\')';
    }
    if (isset($_SESSION['cache']['userprefs'])) {
        unset($_SESSION['cache']['userprefs']);
    }
    if (!PMA_DBI_try_query($query, $GLOBALS['controllink'])) {
        $message = PMA_Message::error(__('Could not save configuration'));
        $message->addMessage('<br /><br />');
        $message->addMessage(PMA_Message::rawError(PMA_DBI_getError($GLOBALS['controllink'])));
        return $message;
    }
    return true;
}

/**
 * Returns a user preferences array filtered by $cfg['UserprefsDisallow']
 * (blacklist) and keys from user preferences form (whitelist)
 *
 * @uses PMA_array_write()
 * @uses PMA_read_userprefs_fieldnames()
 * @param array $config_data path => value pairs
 * @return array
 */
function PMA_apply_userprefs(array $config_data)
{
    $cfg = array();
    $blacklist = array_flip($GLOBALS['cfg']['UserprefsDisallow']);
    $whitelist = array_flip(PMA_read_userprefs_fieldnames());
    foreach ($config_data as $path => $value) {
        if (!isset($whitelist[$path]) || isset($blacklist[$path])) {
            continue;
        }
        PMA_array_write($path, $cfg, $value);
    }
    return $cfg;
}
?>