<?php

/*

 * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between

 * Copyright (C) 2006-2007 Dan Fuhry

 *

 * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied

 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.

 */

  require('includes/common.php');

  global $db, $session, $paths, $template, $plugins; // Common objects

  if(!isset($_GET['_mode'])) die('This script cannot be accessed directly.');

  $_ob = '';

  switch($_GET['_mode']) {

    case "checkusername":

      echo PageUtils::checkusername($_GET['name']);

      break;

    case "getsource":

      $p = ( isset($_GET['pagepass']) ) ? $_GET['pagepass'] : false;

      echo PageUtils::getsource($paths->page, $p);

      break;

    case "getpage":

      // echo PageUtils::getpage($paths->page, false, ( (isset($_GET['oldid'])) ? $_GET['oldid'] : false ));

      $revision_id = ( (isset($_GET['oldid'])) ? intval($_GET['oldid']) : 0 );

      $page = new PageProcessor( $paths->cpage['urlname_nons'], $paths->namespace, $revision_id );

      $pagepass = ( isset($_REQUEST['pagepass']) ) ? $_REQUEST['pagepass'] : '';

      $page->password = $pagepass;

      $page->send();

      break;

    case "savepage":

      $summ = ( isset($_POST['summary']) ) ? $_POST['summary'] : '';

      $minor = isset($_POST['minor']);

      $e = PageUtils::savepage($paths->cpage['urlname_nons'], $paths->namespace, $_POST['text'], $summ, $minor);

      if($e=='good')

      {

        $page = new PageProcessor($paths->cpage['urlname_nons'], $paths->namespace);

        $page->send();

      }

      else

      {

        echo 'Error saving the page: '.$e;

      }

      break;

    case "protect":

      echo PageUtils::protect($paths->cpage['urlname_nons'], $paths->namespace, (int)$_POST['level'], $_POST['reason']);

      break;

    case "histlist":

      echo PageUtils::histlist($paths->cpage['urlname_nons'], $paths->namespace);

      break;

    case "rollback":

      echo PageUtils::rollback( (int)$_GET['id'] );

      break;

    case "comments":

      $comments = new Comments($paths->cpage['urlname_nons'], $paths->namespace);

      if ( isset($_POST['data']) )

      {

        $comments->process_json($_POST['data']);

      }

      else

      {

        die('{ "mode" : "error", "error" : "No input" }');

      }

      break;

    case "rename":

      echo PageUtils::rename($paths->cpage['urlname_nons'], $paths->namespace, $_POST['newtitle']);

      break;

    case "flushlogs":

      echo PageUtils::flushlogs($paths->cpage['urlname_nons'], $paths->namespace);

      break;

    case "deletepage":

      $reason = ( isset($_POST['reason']) ) ? $_POST['reason'] : false;

      if ( empty($reason) )

        die('Please enter a reason for deleting this page.');

      echo PageUtils::deletepage($paths->cpage['urlname_nons'], $paths->namespace, $reason);

      break;

    case "delvote":

      echo PageUtils::delvote($paths->cpage['urlname_nons'], $paths->namespace);

      break;

    case "resetdelvotes":

      echo PageUtils::resetdelvotes($paths->cpage['urlname_nons'], $paths->namespace);

      break;

    case "getstyles":

      echo PageUtils::getstyles($_GET['id']);

      break;

    case "catedit":

      echo PageUtils::catedit($paths->cpage['urlname_nons'], $paths->namespace);

      break;

    case "catsave":

      echo PageUtils::catsave($paths->cpage['urlname_nons'], $paths->namespace, $_POST);

      break;

    case "setwikimode":

      echo PageUtils::setwikimode($paths->cpage['urlname_nons'], $paths->namespace, (int)$_GET['mode']);

      break;

    case "setpass":

      echo PageUtils::setpass($paths->cpage['urlname_nons'], $paths->namespace, $_POST['password']);

      break;

    case "fillusername":

      $name = (isset($_GET['name'])) ? $db->escape($_GET['name']) : false;

      if ( !$name ) 

      {

        die('userlist = new Array(); errorstring=\'Invalid URI\'');

      }

      $q = $db->sql_query('SELECT username,user_id FROM '.table_prefix.'users WHERE lcase(username) LIKE lcase(\'%'.$name.'%\');');

      if ( !$q )

      {

        die('userlist = new Array(); errorstring=\'MySQL error selecting username data: '.addslashes(mysql_error()).'\'');

      }

      if($db->numrows() < 1)

      {

        die('userlist = new Array(); errorstring=\'No usernames found\';');

      }

      echo 'var errorstring = false; userlist = new Array();';

      $i = 0;

      while($r = $db->fetchrow())

      {

        echo "userlist[$i] = '".addslashes($r['username'])."'; ";

        $i++;

      }

      $db->free_result();

      break;

    case "fillpagename":

      $name = (isset($_GET['name'])) ? $_GET['name'] : false;

      if(!$name) die('userlist = new Array(); namelist = new Array(); errorstring=\'Invalid URI\'');

      $nd = RenderMan::strToPageID($name);

      $c = 0;

      $u = Array();

      $n = Array();

      $name = sanitize_page_id($name);

      $name = str_replace('_', ' ', $name);

      for($i=0;$i<sizeof($paths->pages)/2;$i++)

      {

        if( ( 

            preg_match('#'.preg_quote($name).'(.*)#i', $paths->pages[$i]['name']) ||

            preg_match('#'.preg_quote($name).'(.*)#i', $paths->pages[$i]['urlname']) ||

            preg_match('#'.preg_quote($name).'(.*)#i', $paths->pages[$i]['urlname_nons']) ||

            preg_match('#'.preg_quote(str_replace(' ', '_', $name)).'(.*)#i', $paths->pages[$i]['name']) ||

            preg_match('#'.preg_quote(str_replace(' ', '_', $name)).'(.*)#i', $paths->pages[$i]['urlname']) ||

            preg_match('#'.preg_quote(str_replace(' ', '_', $name)).'(.*)#i', $paths->pages[$i]['urlname_nons'])

            ) &&

           ( ( $nd[1] != 'Article' && $paths->pages[$i]['namespace'] == $nd[1] ) || $nd[1] == 'Article' )

            && $paths->pages[$i]['visible']

           )

        {

          $c++;

          $u[] = $paths->pages[$i]['name'];

          $n[] = $paths->pages[$i]['urlname'];

        }

      }

      if($c > 0)

      {

        echo 'userlist = new Array(); namelist = new Array(); errorstring = false; '."\n";

        for($i=0;$i<sizeof($u);$i++) // Can't use foreach because we need the value of $i and we need to use both $u and $n

        {

          echo "userlist[$i] = '".addslashes($n[$i])."';\n";

          echo "namelist[$i] = '".addslashes(htmlspecialchars($u[$i]))."';\n";

        }

      } else {

        die('userlist = new Array(); namelist = new Array(); errorstring=\'No page matches found.\'');

      }

      break;

    case "preview":

      echo PageUtils::genPreview($_POST['text']);

      break;

    case "pagediff":

      $id1 = ( isset($_GET['diff1']) ) ? (int)$_GET['diff1'] : false;

      $id2 = ( isset($_GET['diff2']) ) ? (int)$_GET['diff2'] : false;

      if(!$id1 || !$id2) { echo '<p>Invalid request.</p>'; $template->footer(); break; }

      if(!preg_match('#^([0-9]+)$#', (string)$_GET['diff1']) ||

         !preg_match('#^([0-9]+)$#', (string)$_GET['diff2']  )) { echo '<p>SQL injection attempt</p>'; $template->footer(); break; }

      echo PageUtils::pagediff($paths->cpage['urlname_nons'], $paths->namespace, $id1, $id2);

      break;

    case "jsres":

      die('// ERROR: this section is deprecated and has moved to includes/clientside/static/enano-lib-basic.js.');

      break;

    case "rdns":

      if(!$session->get_permissions('mod_misc')) die('Go somewhere else for your reverse DNS info!');

      $ip = $_GET['ip'];

      $rdns = gethostbyaddr($ip);

      if($rdns == $ip) echo 'Unable to get reverse DNS information. Perhaps the DNS server is down or the PTR record no longer exists.';

      else echo $rdns;

      break;

    case 'acljson':

      $parms = ( isset($_POST['acl_params']) ) ? rawurldecode($_POST['acl_params']) : false;

      echo PageUtils::acl_json($parms);

      break;

    case "change_theme":

      if ( !isset($_POST['theme_id']) || !isset($_POST['style_id']) )

      {

        die('Invalid input');

      }

      if ( !preg_match('/^([a-z0-9_-]+)$/i', $_POST['theme_id']) || !preg_match('/^([a-z0-9_-]+)$/i', $_POST['style_id']) )

      {

        die('Invalid input');

      }

      if ( !file_exists(ENANO_ROOT . '/themes/' . $_POST['theme_id'] . '/css/' . $_POST['style_id'] . '.css') )

      {

        die('Can\'t find theme file: ' . ENANO_ROOT . '/themes/' . $_POST['theme_id'] . '/css/' . $_POST['style_id'] . '.css');

      }

      if ( !$session->user_logged_in )

      {

        die('You must be logged in to change your theme');

      }

      // Just in case something slipped through...

      $theme_id = $db->escape($_POST['theme_id']);

      $style_id = $db->escape($_POST['style_id']);

      $e = $db->sql_query('UPDATE ' . table_prefix . "users SET theme='$theme_id', style='$style_id' WHERE user_id=$session->user_id;");

      if ( !$e )

        die( $db->get_error() );

      die('GOOD');

      break;

    case 'get_tags':

      $json = new Services_JSON(SERVICES_JSON_LOOSE_TYPE);

      $ret = array('tags' => array(), 'user_level' => $session->user_level, 'can_add' => $session->get_permissions('tag_create'));

      $q = $db->sql_query('SELECT t.tag_id, t.tag_name, pg.pg_target IS NOT NULL AS used_in_acl, t.user FROM '.table_prefix.'tags AS t

        LEFT JOIN '.table_prefix.'page_groups AS pg

          ON ( ( pg.pg_type = ' . PAGE_GRP_TAGGED . ' AND pg.pg_target=t.tag_name ) OR ( pg.pg_type IS NULL AND pg.pg_target IS NULL ) )

        WHERE t.page_id=\'' . $db->escape($paths->cpage['urlname_nons']) . '\' AND t.namespace=\'' . $db->escape($paths->namespace) . '\';');

      if ( !$q )

        $db->_die();

      while ( $row = $db->fetchrow() )

      {

        $can_del = true;

        $perm = ( $row['user'] != $session->user_id ) ?

                'tag_delete_other' :

                'tag_delete_own';

        if ( $row['user'] == 1 && !$session->user_logged_in )

          // anonymous user trying to delete tag (hardcode blacklisted)

          $can_del = false;

        if ( !$session->get_permissions($perm) )

          $can_del = false;

        if ( $row['used_in_acl'] == 1 && !$session->get_permissions('edit_acl') && $session->user_level < USER_LEVEL_ADMIN )

          $can_del = false;

        $ret['tags'][] = array(

          'id' => $row['tag_id'],

          'name' => $row['tag_name'],

          'can_del' => $can_del,

          'acl' => ( $row['used_in_acl'] == 1 )

        );

      }

      echo $json->encode($ret);

      break;

    case 'addtag':

      $json = new Services_JSON(SERVICES_JSON_LOOSE_TYPE);

      $resp = array(

          'success' => false,

          'error' => 'No error',

          'can_del' => ( $session->get_permissions('tag_delete_own') && $session->user_logged_in ),

          'in_acl' => false

        );

      // first of course, are we allowed to tag pages?

      if ( !$session->get_permissions('tag_create') )

      {

        $resp['error'] = 'You are not permitted to tag pages.';

        die($json->encode($resp));

      }

      // sanitize the tag name

      $tag = sanitize_tag($_POST['tag']);

      $tag = $db->escape($tag);

      if ( strlen($tag) < 2 )

      {

        $resp['error'] = 'Tags must consist of at least 2 alphanumeric characters.';

        die($json->encode($resp));

      }

      // check if tag is already on page

      $q = $db->sql_query('SELECT 1 FROM '.table_prefix.'tags WHERE page_id=\'' . $db->escape($paths->cpage['urlname_nons']) . '\' AND namespace=\'' . $db->escape($paths->namespace) . '\' AND tag_name=\'' . $tag . '\';');

      if ( !$q )

        $db->_die();

      if ( $db->numrows() > 0 )

      {

        $resp['error'] = 'This page already has this tag.';

        die($json->encode($resp));

      }

      $db->free_result();

      // tricky: make sure this tag isn't being used in some page group, and thus adding it could affect page access

      $can_edit_acl = ( $session->get_permissions('edit_acl') || $session->user_level >= USER_LEVEL_ADMIN );

      $q = $db->sql_query('SELECT 1 FROM '.table_prefix.'page_groups WHERE pg_type=' . PAGE_GRP_TAGGED . ' AND pg_target=\'' . $tag . '\';');

      if ( !$q )

        $db->_die();

      if ( $db->numrows() > 0 && !$can_edit_acl )

      {

        $resp['error'] = 'This tag is used in an ACL page group, and thus can\'t be added to a page by people without administrator privileges.';

        die($json->encode($resp));

      }

      $resp['in_acl'] = ( $db->numrows() > 0 );

      $db->free_result();

      // we're good

      $q = $db->sql_query('INSERT INTO '.table_prefix.'tags(tag_name,page_id,namespace,user) VALUES(\'' . $tag . '\', \'' . $db->escape($paths->cpage['urlname_nons']) . '\', \'' . $db->escape($paths->namespace) . '\', ' . $session->user_id . ');');

      if ( !$q )

        $db->_die();

      $resp['success'] = true;

      $resp['tag'] = $tag;

      $resp['tag_id'] = $db->insert_id();

      echo $json->encode($resp);

      break;

    case 'deltag':

      $tag_id = intval($_POST['tag_id']);

      if ( empty($tag_id) )

        die('Invalid tag ID');

      $q = $db->sql_query('SELECT t.tag_id, t.user, t.page_id, t.namespace, pg.pg_target IS NOT NULL AS used_in_acl FROM '.table_prefix.'tags AS t

  LEFT JOIN '.table_prefix.'page_groups AS pg

    ON ( pg.pg_id IS NULL OR ( pg.pg_target = t.tag_name AND pg.pg_type = ' . PAGE_GRP_TAGGED . ' ) )

  WHERE t.tag_id=' . $tag_id . ';');

      if ( !$q )

        $db->_die();

      if ( $db->numrows() < 1 )

        die('Could not find a tag with that ID');

      $row = $db->fetchrow();

      $db->free_result();

      if ( $row['page_id'] == $paths->cpage['urlname_nons'] && $row['namespace'] == $paths->namespace )

        $perms =& $session;

      else

        $perms = $session->fetch_page_acl($row['page_id'], $row['namespace']);

      $perm = ( $row['user'] != $session->user_id ) ?

                'tag_delete_other' :

                'tag_delete_own';

      if ( $row['user'] == 1 && !$session->user_logged_in )

        // anonymous user trying to delete tag (hardcode blacklisted)

        die('You are not authorized to delete this tag.');

      if ( !$perms->get_permissions($perm) )

        die('You are not authorized to delete this tag.');

      if ( $row['used_in_acl'] == 1 && !$perms->get_permissions('edit_acl') && $session->user_level < USER_LEVEL_ADMIN )

        die('You are not authorized to delete this tag.');

      // We're good

      $q = $db->sql_query('DELETE FROM '.table_prefix.'tags WHERE tag_id = ' . $tag_id . ';');

      if ( !$q )

        $db->_die();

      echo 'success';

      break;

    case 'ping':

      echo 'pong';

      break;

    default:

      die('Hacking attempt');

      break;

  }

?>