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<?php
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// $Id: drupalvb.module,v 1.11 2008/04/19 02:58:47 sun Exp $
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/**
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* @file
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* Drupal vB module database functions.
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*
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* Forked from Migrator module, http://drupal.org/project/migrator
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*/
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/**
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* Add vB database connection and connect to remote system database.
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*
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* If remote system database connection is identical to Drupal's database
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* connection, we skip switching the connection and alter the prefix only.
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*
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* @see drupalvb_db_disconnect(), drupalvb_get()
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*/
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function drupalvb_db_connect() {
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global $db_url, $db_prefix;
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if (drupalvb_db_is_valid()) {
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if (!variable_get('drupalvb_db_is_default', TRUE)) {
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$drupalvb_db_url = variable_get('drupalvb_db', '');
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if (!is_array($db_url)) {
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$db_url = array('default' => $db_url);
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}
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if (!empty($drupalvb_db_url)) {
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$db_url['drupalvb'] = $drupalvb_db_url;
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db_set_active('drupalvb');
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}
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}
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drupalvb_get_default_db_prefix();
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$db_prefix = variable_get('drupalvb_db_prefix', 'vb_');
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}
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}
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/**
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* Disconnect from remote system database.
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*
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* @see drupalvb_db_connect(), drupalvb_get()
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*/
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function drupalvb_db_disconnect() {
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if (drupalvb_db_is_valid()) {
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if (!variable_get('drupalvb_db_is_default', TRUE)) {
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db_set_active();
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}
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drupalvb_set_default_db_prefix();
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}
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}
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/**
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* Helper function to recall Drupal's default database table prefix.
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*
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* @see drupalvb_set_default_prefix()
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*/
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function drupalvb_get_default_db_prefix() {
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global $db_prefix;
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static $drupal_db_prefix;
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if (!isset($drupal_db_prefix)) {
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$drupal_db_prefix = $db_prefix;
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}
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return $drupal_db_prefix;
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}
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/**
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* Helper function to reset Drupal's default database table prefix.
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*
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* @see drupalvb_get_default_prefix()
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*/
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function drupalvb_set_default_db_prefix() {
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global $db_prefix;
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$db_prefix = drupalvb_get_default_db_prefix();
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}
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/**
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* Check if a configured remote system database connection is valid.
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*
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* @see drupalvb_settings_system()
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*/
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function drupalvb_db_is_valid() {
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static $valid;
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if (isset($valid)) {
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return $valid;
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}
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$valid = FALSE;
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$connection_string = variable_get('drupalvb_db', '');
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$db = parse_url($connection_string);
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if (!empty($db['scheme']) && !empty($db['host']) && !empty($db['user']) && !empty($db['pass']) && !empty($db['path'])) {
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foreach (array('user', 'pass', 'host', 'path') as $value) {
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$db[$value] = urldecode($db[$value]);
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}
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// Drupal can't switch database layers, so we fix it if it differs from the
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// globally used type.
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if ($db['scheme'] != $GLOBALS['db_type']) {
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variable_set('drupalvb_db', preg_replace('/^'. $db['scheme'] .'/', $GLOBALS['db_type'], $connection_string));
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}
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switch ($GLOBALS['db_type']) {
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case 'mysql':
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$connection = @mysql_connect($db['host'], $db['user'], $db['pass'], TRUE, 2);
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if ($connection && mysql_select_db(substr($db['path'], 1))) {
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$valid = TRUE;
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}
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@mysql_close($connection);
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break;
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case 'mysqli':
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$connection = mysqli_init();
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@mysqli_real_connect($connection, $db['host'], $db['user'], $db['pass'], substr($db['path'], 1), $db['port'], NULL, MYSQLI_CLIENT_FOUND_ROWS);
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if ($connection) {
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$valid = TRUE;
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}
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@mysqli_close($connection);
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break;
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}
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}
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if (!$valid && user_access('administer drupalvb')) {
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drupal_set_message(t('Invalid database connection for vBulletin. Please configure the connection in <a href="!settings">Drupal vB\'s settings</a>', array('!settings' => url('admin/settings/drupalvb/database'))), 'error');
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}
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return $valid;
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}
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/**
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* Generic database callback for querying pre-defined data from remote system.
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*
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* @param string $op
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* The get-operation to perform in the remote system.
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*/
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function drupalvb_get($op) {
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$function = 'drupalvb_get_'. $op;
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if (!function_exists($function)) {
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return FALSE;
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}
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drupalvb_db_connect();
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$args = func_get_args();
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array_shift($args);
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$result = call_user_func_array($function, $args);
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drupalvb_db_disconnect();
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return $result;
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}
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/**
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* Query remote system database.
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*
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* @see db_query()
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*/
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function drupalvb_db_query($query) {
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drupalvb_db_connect();
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$args = func_get_args();
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array_shift($args);
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$query = db_prefix_tables($query);
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if (isset($args[0]) and is_array($args[0])) { // 'All arguments in one array' syntax
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$args = $args[0];
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}
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_db_query_callback($args, TRUE);
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$query = preg_replace_callback(DB_QUERY_REGEXP, '_db_query_callback', $query);
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$result = _db_query($query);
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drupalvb_db_disconnect();
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return $result;
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}
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/**
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* Query remote system database with range.
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*
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* @see db_query_range
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*/
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function drupalvb_db_query_range($query) {
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drupalvb_db_connect();
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$args = func_get_args();
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$count = array_pop($args);
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$from = array_pop($args);
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array_shift($args);
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$query = db_prefix_tables($query);
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if (isset($args[0]) and is_array($args[0])) { // 'All arguments in one array' syntax
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$args = $args[0];
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}
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_db_query_callback($args, TRUE);
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$query = preg_replace_callback(DB_QUERY_REGEXP, '_db_query_callback', $query);
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$query .= ' LIMIT '. (int)$count .' OFFSET '. (int)$from;
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$result = _db_query($query);
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drupalvb_db_disconnect();
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return $result;
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}
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/**
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* Return the last insert id.
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*
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* Borrowed from Drupal 6.
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*/
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function drupalvb_db_last_insert_id($table, $field) {
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return db_result(drupalvb_db_query('SELECT LAST_INSERT_ID()'));
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}
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/**
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* Initialize DrupalvB's user mapping table upon installation.
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*
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* Note: We can't do this in a single query, because Drupal's and vB's tables
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* need not to be in the same database.
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*
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* @see drupalvb.admin-pages.inc
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*/
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function _drupalvb_init_user_map() {
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$users = $vbusers = array();
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// Fetch all users in Drupal.
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$result = db_query("SELECT uid, name FROM {users}");
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while ($user = db_fetch_array($result)) {
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$users[$user['name']] = $user['uid'];
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}
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// Fetch all users in vBulletin.
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$result = drupalvb_db_query("SELECT userid, username FROM {user}");
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// Insert all vB users who already exist in Drupal with corresponding username
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// into our mapping table.
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while ($vbuser = db_fetch_array($result)) {
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if (isset($users[$vbuser['username']])) {
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db_query("INSERT INTO {drupalvb_users} (uid, userid) VALUES (%d, %d)", $users[$vbuser['username']], $vbuser['userid']);
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}
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}
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}
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