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<?php
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// $Id: url_access.module,v 1.1.2.2 2008/06/11 19:08:38 deviantintegral Exp $
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/**
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* @file
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* Enables the creation of pages protected by a unique path.
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*/
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/**
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* Implementation of hook_menu
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* Moved from hook_init as user_access isn't available if caching is enabled.
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*/
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function url_access_menu($may_cache) {
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if (!$may_cache) {
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global $user;
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// Node Administrators can always view nodes
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if(user_access('administer nodes')) return;
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// If we aren't on a node, return
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if (arg(0) != 'node') return;
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$nid= arg(1);
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if( ! is_numeric( $nid)) return;
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$node_info = db_fetch_array(db_query("SELECT n.uid, u.uuid FROM {url_access} u INNER JOIN {node} n ON n.nid=u.nid WHERE u.nid=%d", $nid));
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// Let the author have access
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if($user->uid == $node_info['uid']) return;
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// There's no UUID in the database, so there's nothing to block
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if (!$node_info['uuid']) return;
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$url = explode('/', trim(request_uri(), '/'));
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$url[0]= str_replace( '?q=', '', $url[0]);
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if($url[0] == 'protected') {
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$url_uuid = $url[1];
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if($url_uuid == $node_info['uuid']) {
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return;
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}
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}
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drupal_access_denied();
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exit;
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}
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}
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/**
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* Implementation of hook_nodeapi
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*/
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function url_access_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
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switch ($op) {
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case 'delete':
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$query = "DELETE FROM {url_access} WHERE nid=%d;";
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db_query($query, $node->nid);
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break;
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case 'insert':
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if(!$node->url_access) break;
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$uuid = _url_access_uuid();
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path_set_alias('node/' . $node->nid, 'protected/' . $uuid);
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$query = "INSERT INTO {url_access} VALUES('%d', '%s');";
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db_query($query, $node->nid, $uuid);
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$url = 'protected/' . $uuid;
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drupal_set_message(t('Protected URL set to !url', array('!url' => l($url, $url))));
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break;
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case 'load':
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$query = "SELECT uuid FROM {url_access} WHERE nid=%d";
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$result = db_query($query, $node->nid);
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$uuid = db_result($result);
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$node->url_access = $uuid;
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break;
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case 'update':
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if($node->url_access) {
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$query = "SELECT uuid FROM {url_access} WHERE nid=%d";
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$result = db_query($query, $node->nid);
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$uuid = db_result($result);
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if (!$uuid) {
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url_access_nodeapi($node, 'insert', $a3, $a4);
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}
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}
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else {
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$query = "SELECT uuid FROM {url_access} WHERE nid=%d";
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$result = db_query($query, $node->nid);
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$uuid = db_result($result);
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if (!$uuid) break;
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$pid = db_result(db_query("SELECT pid FROM {url_alias} WHERE dst = '%s'", 'protected/' . $uuid));
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path_admin_delete($pid);
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url_access_nodeapi($node, 'delete', $a3, $a4);
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}
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break;
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case 'validate':
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break;
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}
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}
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/**
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* Implementation of hook_form_alter
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*/
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function url_access_form_alter($form_id, &$form) {
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// We're only modifying node forms, if the type field isn't set we don't need
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// to bother; otherwise, store it for later retrieval.
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if (isset($form['type'])) {
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$type = $form['type']['#value'];
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}
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elseif (isset($form['orig_type'])) {
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$type = $form['orig_type']['#value'];
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}
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else {
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return;
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}
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switch($form_id) {
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case $type . '_node_form':
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$form['url_access_set'] = array(
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'#type' => 'fieldset',
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'#title' => t('URL Access Restrictions'),
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'#collapsible' => TRUE,
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'#collapsed' => TRUE,
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);
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$form['url_access_set']['url_access'] = array(
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'#type' => 'checkbox',
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'#title' => t('Require unique URL for access'),
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'#description' => t('If enabled, only administrators and those with the correct URL
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will be able to view this node.'),
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'#default_value' => $form['#node']->url_access,
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);
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if ($form['#node']->url_access) {
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$url = 'protected/' . $form['#node']->url_access;
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$form['url_access_set']['url_access_path'] = array(
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'#value' => t('The URL Access Path for this node is !url.', array(
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'!url' => l($url, $url)
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)),
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'#prefix' => '<p>',
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'#suffix' => '</p>',
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);
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}
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break;
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}
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}
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/**
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* Return a UUID generated by the database.
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*
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* @return
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* A string containing a 37 character UUID, including dashes.
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*/
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function _url_access_uuid() {
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$query = "SELECT UUID();";
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$result = db_query($query);
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$uuid = db_result($result);
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return $uuid;
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}
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