<?php

/*

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

 * Copyright (C) 2006-2009 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.

 */

// Page management smart form

function page_Admin_PageManager()

{

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

  global $lang;

  global $cache;

  if ( $session->auth_level < USER_LEVEL_ADMIN || $session->user_level < USER_LEVEL_ADMIN )

  {

    $login_link = makeUrlNS('Special', 'Login/' . $paths->nslist['Special'] . 'Administration', 'level=' . USER_LEVEL_ADMIN, true);

    echo '<h3>' . $lang->get('adm_err_not_auth_title') . '</h3>';

    echo '<p>' . $lang->get('adm_err_not_auth_body', array( 'login_link' => $login_link )) . '</p>';

    return;

  }

  require_once(ENANO_ROOT . '/includes/pageutils.php');

  echo '<h3>' . $lang->get('acppm_heading_main') . '</h3>';

  $show_select = true;

  if ( isset($_REQUEST['action']) || isset($_REQUEST['source']) )

  {

    if ( isset($_REQUEST['action']) )

    {

      $act =& $_REQUEST['action'];

      $act = strtolower($act);

    }

    else if ( isset($_REQUEST['source']) && $_REQUEST['source'] == 'ajax' )

    {

      $act = 'select';

    }

    switch ( $act )

    {

      case 'save':

      case 'select':

        // First step is to determine the page ID and namespace

        if ( isset($_REQUEST['pid_search']) )

        {

          list($page_id, $namespace) = RenderMan::strToPageID($_REQUEST['page_id']);

          $name = $db->escape(dirtify_page_id($page_id));

          $page_id = $db->escape(sanitize_page_id($page_id));

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

          $name = strtolower($name);

          $page_id = strtolower($page_id);

          $sql = "SELECT * FROM " . table_prefix . "pages WHERE ( " . ENANO_SQLFUNC_LOWERCASE . "(urlname) LIKE '%$page_id%' OR " . ENANO_SQLFUNC_LOWERCASE . "(name) LIKE '%$name%' ) ORDER BY name ASC;";

        }

        else

        {

          // pid_search was not set, assume absolute page ID

          list($page_id, $namespace) = RenderMan::strToPageID($_REQUEST['page_id']);

          $page_id = $db->escape(sanitize_page_id($page_id));

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

          $sql = "SELECT * FROM " . table_prefix . "pages WHERE urlname = '$page_id' AND namespace = '$namespace';";

        }

        if ( !($q = $db->sql_query($sql)) )

        {

          $db->_die('PageManager selecting dataset for page');

        }

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

        {

          echo '<div class="error-box">

                  ' . $lang->get('acppm_err_page_not_found') . '

                </div>';

          break;

        }

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

        {

          // Ambiguous results

          if ( isset($_REQUEST['pid_search']) )

          {

            echo '<h3>' . $lang->get('acppm_msg_results_ambiguous_title') . '</h3>';

            echo '<p>' . $lang->get('acppm_msg_results_ambiguous_body') . '</p>';

            echo '<ul>';

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

            {

              echo '<li>';

              $pathskey = $paths->nslist[$row['namespace']] . $row['urlname'];

              $edit_url = makeUrlNS('Special', 'Administration', "module={$paths->nslist['Admin']}PageManager&action=select&page_id=$pathskey", true);

              $view_url = makeUrlNS($row['namespace'], $row['urlname']);

              $page_name = htmlspecialchars(get_page_title_ns( $row['urlname'], $row['namespace'] ));

              $view_link = $lang->get('acppm_ambig_btn_viewpage');

              echo "<a href=\"$edit_url\">$page_name</a> (<a onclick=\"window.open(this.href); return false;\" href=\"$view_url\">$view_link</a>)";

              echo '</li>';

            }

            echo '</ul>';

            $show_select = false;

            break;

          }

          else

          {

            echo '<p>' . $lang->get('acppm_err_ambig_absolute') . '</p>';

            break;

          }

        }

        // From this point on we can assume that exactly one matching page was found.

        $dataset = $db->fetchrow();

        $page_id = $dataset['urlname'];

        $namespace = $dataset['namespace'];

        // This is used to re-determine the page ID after submit.

        $pathskey = $paths->nslist[$namespace] . sanitize_page_id($page_id);

        // The extra switch allows us to break out of the save routine if needed

        switch ( $act )

        {

          case 'save':

            $errors = array();

            $page_id_changed = false;

            $namespace_changed = false;

            // Backup the dataset to avoid redundantly updating values

            $dataset_backup = $dataset;

            // We've elected to save the page. The angle of attack here is to validate each form field,

            // and if the field validates successfully, change the value in $dataset accordingly.

            // Field: page name

            $page_name = $_POST['page_name'];

            $page_name = trim($page_name);

            if ( empty($page_name) )

            {

              $errors[] = $lang->get('acppm_err_invalid_page_name');

            }

            else

            {

              $dataset['name'] = $page_name;

            }

            // Field: page URL string

            $page_urlname = $_POST['page_urlname'];

            $page_urlname = trim($_POST['page_urlname']);

            if ( empty($page_urlname) && get_main_page() !== '' )

            {

              $errors[] = $lang->get('acppm_err_invalid_url_string');

            }

            else

            {

              $page_id_changed = ( $_POST['page_urlname'] !== $dataset['urlname'] );

              $dataset['urlname'] = sanitize_page_id($page_urlname);

            }

            // Field: namespace

            $namespace_new = $_POST['page_namespace'];

            if ( !isset($paths->nslist[ $namespace ]) )

            {

              $errors[] = $lang->get('acppm_err_invalid_namespace');

            }

            else

            {

              $namespace_changed = ( $_POST['page_namespace'] !== $dataset['namespace'] );

              $dataset['namespace'] = $namespace_new;

            }

            // Field: comments enabled

            $dataset['comments_on'] = ( isset($_POST['comments_on']) ) ? 1 : 0;

            // Field: page visible

            $dataset['visible'] = ( isset($_POST['visible']) ) ? 1 : 0;

            // Field: standalone page

            $dataset['special'] = ( isset($_POST['special']) ) ? 1 : 0;

            // Field: page protection

            $protect_level = $_POST['protected'];

            if ( !in_array($protect_level, array('0', '1', '2')) )

            {

              $errors[] = $lang->get('acppm_err_invalid_protection');

            }

            else

            {

              $dataset['protected'] = intval($protect_level);

            }

            // Field: wiki mode

            $wiki_mode = $_POST['wikimode'];

            if ( !in_array($wiki_mode, array('0', '1', '2')) )

            {

              $errors[] = $lang->get('acppm_err_invalid_wiki_mode');

            }

            else

            {

              $dataset['wiki_mode'] = intval($wiki_mode);

            }

            if ( count($errors) < 1 )

            {

              // We're free of errors. Build a SQL query to update the page table.

              $particles = array();

              foreach ( $dataset as $key => $value )

              {

                if ( $value === $dataset_backup[$key] || ( is_int($value) && $value === intval($dataset_backup[$key]) ) )

                  continue;

                if ( is_int($value) )

                {

                  $particle = "$key = $value";

                }

                else

                {

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

                  $particle = "$key = '$value'";

                }

                $particles[] = $particle;

                unset($particle);

              }

              $page_id_new = $db->escape($dataset['urlname']);

              $namespace_new = $db->escape($dataset['namespace']);

              // Only run the update query if at least one field was changed.

              if ( count($particles) > 0 )

              {

                $particles = implode(', ', $particles);

                $page_id_db = $db->escape($page_id);

                $namespace_db = $db->escape($namespace);

                $sql = 'UPDATE ' . table_prefix . "pages SET $particles WHERE urlname = '$page_id_db' AND namespace = '$namespace_db';";

                if ( !$db->sql_query($sql) )

                  $db->_die('PageManager running primary update query');

                // Did we change the page ID or namespace? If so we need to also change logs, comments, tags, etc.

                if ( $page_id_changed || $namespace_changed )

                {

                  $sql = array(

                      'UPDATE ' . table_prefix . "logs SET page_id = '$page_id_new', namespace = '$namespace_new' WHERE page_id = '$page_id_db' AND namespace = '$namespace_db';",

                      'UPDATE ' . table_prefix . "tags SET page_id = '$page_id_new', namespace = '$namespace_new' WHERE page_id = '$page_id_db' AND namespace = '$namespace_db';",

                      'UPDATE ' . table_prefix . "comments SET page_id = '$page_id_new', namespace = '$namespace_new' WHERE page_id = '$page_id_db' AND namespace = '$namespace_db';",

                      'UPDATE ' . table_prefix . "page_text SET page_id = '$page_id_new', namespace = '$namespace_new' WHERE page_id = '$page_id_db' AND namespace = '$namespace_db';",

                      'UPDATE ' . table_prefix . "categories SET page_id = '$page_id_new', namespace = '$namespace_new' WHERE page_id = '$page_id_db' AND namespace = '$namespace_db';"

                    );

                  foreach ( $sql as $q )

                  {

                    if ( !$db->sql_query($q) )

                      $db->_die('PageManager running slave update query after page ID/namespace change');

                  }

                  // If we're going File -> other, remove files

                  if ( $namespace_db === 'File' )

                  {

                    PageUtils::delete_page_files($page_id);

                  }

                }

                // Did we change the name of the page? If so, make PageProcessor log it

                if ( $dataset_backup['name'] != $dataset['name'] )

                {

                  $page = new PageProcessor($page_id_new, $namespace_new);

                  $page->rename_page($dataset['name']);

                }

                // Finally, clear the metadata cache

                $cache->purge('page_meta');

              }

              // Did the user ask to delete the page?

              // I know it's a bit pointless to delete the page only after validating and processing the whole form, but what the heck :)

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

              {

                PageUtils::deletepage($page_id_new, $namespace_new, $lang->get('acppm_delete_reason'));

              }

              echo '<div class="info-box">' . $lang->get('acppm_msg_save_success', array( 'viewpage_url' => makeUrlNS($dataset['namespace'], $dataset['urlname']) )) . '</div>';

              break 2;

            }

            break;

        }

        $tpl_code = <<<TPLCODE

        <div class="tblholder">

          <table border="0" cellspacing="1" cellpadding="4">

            <tr>

              <th colspan="2">

                {lang:acppm_heading_editing} "{PAGE_NAME}"

              </th>

            </tr>

            <tr>

              <td class="row2">

                {lang:acppm_lbl_page_name}

              </td>

              <td class="row1">

                <input type="text" name="page_name" value="{PAGE_NAME}" size="40" />

              </td>

            </tr>

            <tr>

              <td class="row2">

                {lang:acppm_lbl_page_urlname}<br />

                <small>{lang:acppm_lbl_page_urlname_hint}</small>

              </td>

              <td class="row1">

                <input type="text" name="page_urlname" value="{PAGE_URLNAME}" size="40" />

              </td>

            </tr>

            <tr>

              <td class="row2">

                {lang:acppm_lbl_namespace}

              </td>

              <td class="row1">

                <select name="page_namespace">

                {NAMESPACE_LIST}</select>

                <!-- BEGIN is_file -->

                <br />

                {lang:acppm_msg_file_ns_warning}

                <!-- END is_file -->

              </td>

            </tr>

            <tr>

              <th colspan="2" class="subhead">

                {lang:acppm_heading_advanced}

              </th>

            </tr>

            <tr>

              <td class="row2">

                {lang:acppm_lbl_enable_comments_title}

              </td>

              <td class="row1">

                <label>

                  <input type="checkbox" name="comments_on" <!-- BEGIN comments_enabled -->checked="checked" <!-- END comments_enabled -->/>

                  {lang:acppm_lbl_enable_comments}

                </label>

                <br />

                <small>{lang:acppm_lbl_enable_comments_hint}</small>

              </td>

            </tr>

            <tr>

              <td class="row2">

                {lang:acppm_lbl_special_title}

              </td>

              <td class="row1">

                <label>

                  <input type="checkbox" name="special" <!-- BEGIN special -->checked="checked" <!-- END special -->/>

                  {lang:acppm_lbl_special}

                </label>

                <br />

                <small>{lang:acppm_lbl_special_hint}</small>

              </td>

            </tr>

            <tr>

              <td class="row2">

                {lang:acppm_lbl_visible_title}

              </td>

              <td class="row1">

                <label>

                  <input type="checkbox" name="visible" <!-- BEGIN visible -->checked="checked" <!-- END visible -->/>

                  {lang:acppm_lbl_visible}

                </label>

                <br />

                <small>{lang:acppm_lbl_visible_hint}</small>

              </td>

            </tr>

            <tr>

              <td class="row2">

                {lang:acppm_lbl_protected_title}

              </td>

              <td class="row1">

                <label>

                  <input type="radio" name="protected" value="0" <!-- BEGIN protected_off -->checked="checked" <!-- END protected_off -->/>

                  {lang:acppm_lbl_protected_off}

                </label>

                <br />

                <label>

                  <input type="radio" name="protected" value="1" <!-- BEGIN protected_on -->checked="checked" <!-- END protected_on -->/>

                  {lang:acppm_lbl_protected_on}

                </label>

                <br />

                <label>

                  <input type="radio" name="protected" value="2" <!-- BEGIN protected_semi -->checked="checked" <!-- END protected_semi -->/>

                  {lang:acppm_lbl_protected_semi}

                </label>

                <br />

                <small>{lang:acppm_lbl_protected_hint}</small>

              </td>

            </tr>

            <tr>

              <td class="row2">

                {lang:acppm_lbl_wikimode_title}

              </td>

              <td class="row1">

                <label>

                  <input type="radio" name="wikimode" value="0" <!-- BEGIN wikimode_off -->checked="checked" <!-- END wikimode_off -->/>

                  {lang:acppm_lbl_wikimode_off}

                </label>

                <br />

                <label>

                  <input type="radio" name="wikimode" value="1" <!-- BEGIN wikimode_on -->checked="checked" <!-- END wikimode_on -->/>

                  {lang:acppm_lbl_wikimode_on}

                </label>

                <br />

                <label>

                  <input type="radio" name="wikimode" value="2" <!-- BEGIN wikimode_global -->checked="checked" <!-- END wikimode_global -->/>

                  {lang:acppm_lbl_wikimode_global}

                </label>

                <br />

                <small>{lang:acppm_lbl_wikimode_hint}</small>

              </td>

            </tr>

            <tr>

              <td class="row2">

                {lang:acppm_lbl_delete_title}

              </td>

              <td class="row1">

                <label>

                  <input type="checkbox" name="delete" />

                  {lang:acppm_lbl_delete}

                </label>

                <br />

                <small>{lang:acppm_lbl_delete_hint}</small>

              </td>

            </tr>

            <tr>

              <th colspan="2" class="subhead">

                <button name="action" value="save">

                  <b>{lang:etc_save_changes}</b>

                </button>

                <button name="action" value="nil">

                  <b>{lang:etc_cancel}</b>

                </button>

              </th>

            </tr>

          </table>

        </div>

        <input type="hidden" name="page_id" value="{PATHS_KEY}" />

TPLCODE;

        $parser = $template->makeParserText($tpl_code);

        $ns_list = '';

        foreach ( $paths->nslist as $ns => $prefix ) 

        {

          // FIXME: Plugins need to specify whether they want Enano's regular PageProcessor

          // to handle these pages, and whether such pages from namespaces created by plugins

          // can be stored in the database or not.

          if ( $ns == 'Special' || $ns == 'Admin' || $ns == 'Anonymous' )

            continue;

          $ns = htmlspecialchars($ns);

          $prefix = htmlspecialchars($prefix);

          if ( empty($prefix) )

            $prefix = $lang->get('acppm_ns_article');

          $sel = ( $dataset['namespace'] == $ns ) ? ' selected="selected"' : '';

          $ns_list .= "  <option value=\"$ns\"$sel>$prefix</option>\n                ";

        }

        $parser->assign_vars(array(

            'PAGE_NAME' => htmlspecialchars($dataset['name']),

            'PAGE_URLNAME' => htmlspecialchars($dataset['urlname']),

            'NAMESPACE_LIST' => $ns_list,

            'PATHS_KEY' => $pathskey

          ));

        $parser->assign_bool(array(

            'comments_enabled' => ( $dataset['comments_on'] == 1 ),

            'special' => ( $dataset['special'] == 1 ),

            'visible' => ( $dataset['visible'] == 1 ),

            'protected_off'   => ( $dataset['protected'] == 0 ),

            'protected_on'    => ( $dataset['protected'] == 1 ),

            'protected_semi'  => ( $dataset['protected'] == 2 ),

            'wikimode_off'    => ( $dataset['wiki_mode'] == 0 ),

            'wikimode_on'     => ( $dataset['wiki_mode'] == 1 ),

            'wikimode_global' => ( $dataset['wiki_mode'] == 2 ),

            'is_file'         => ( $dataset['namespace'] == 'File' )

          ));

        if ( isset($errors) )

        {

          echo '<div class="error-box">';

          echo $lang->get('acppm_err_header');

          echo '<ul>';

          echo '<li>' . implode('</li><li>', $errors) . '</li>';

          echo '</ul>';

          echo '</div>';

        }

        $form_action = makeUrlNS('Special', 'Administration', "module={$paths->nslist['Admin']}PageManager", true);

        echo "<form action=\"$form_action\" method=\"post\">";

        echo $parser->run();

        echo "</form>";

        $show_select = false;

        break;

    }

  }

  if ( $show_select )

  {

    echo '<p>' . $lang->get('acppm_hint') . '</p>';

    // Show the search form

    $form_action = makeUrlNS('Special', 'Administration', "module={$paths->nslist['Admin']}PageManager", true);

    echo "<form action=\"$form_action\" method=\"post\">";

    echo $lang->get('acppm_lbl_field_search') . ' ';

    echo $template->pagename_field('page_id') . ' ';