<?php

/*

Plugin Name: Search UI/frontend

Plugin URI: http://enanocms.org/

Description: Provides the page Special:Search, which is a frontend to the Enano search engine.

Author: Dan Fuhry

Version: 1.0.3

Author URI: http://enanocms.org/

*/

/*

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

 * Version 1.0.3

 * 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.

 */

$plugins->attachHook('base_classes_initted', '

  global $paths;

    $paths->add_page(Array(

      \'name\'=>\'Rebuild search index\',

      \'urlname\'=>\'SearchRebuild\',

      \'namespace\'=>\'Special\',

      \'special\'=>0,\'visible\'=>1,\'comments_on\'=>0,\'protected\'=>1,\'delvotes\'=>0,\'delvote_ips\'=>\'\',

      ));

    $paths->add_page(Array(

      \'name\'=>\'Search\',

      \'urlname\'=>\'Search\',

      \'namespace\'=>\'Special\',

      \'special\'=>0,\'visible\'=>1,\'comments_on\'=>0,\'protected\'=>1,\'delvotes\'=>0,\'delvote_ips\'=>\'\',

      ));

    ');

function page_Special_SearchRebuild()

{

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

  if(!$session->get_permissions('mod_misc')) die_friendly('Unauthorized', '<p>You need to be an administrator to rebuild the search index</p>');

  $template->header();

  @set_time_limit(0);

  if($paths->rebuild_search_index(true))

    echo '<p>Index rebuilt!</p>';

  else

    echo '<p>Index was not rebuilt due to an error.';

  $template->footer();

}

function page_Special_Search()

{

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

  global $aggressive_optimize_html;

  $aggressive_optimize_html = false;

  if ( !$q = $paths->getParam(0) )

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

  if(isset($_GET['words_any']))

  {

    $q = '';

    if(!empty($_GET['words_any']))

    {

      $q .= $_GET['words_any'] . ' ';

    }

    if(!empty($_GET['exact_phrase']))

    {

      $q .= '"' . $_GET['exact_phrase'] . '" ';

    }

    if(!empty($_GET['exclude_words']))

    {

      $not = explode(' ', $_GET['exclude_words']);

      foreach ( $not as $i => $foo )

      {

        $not[$i] = '-' . $not[$i];

      }

      $q .= implode(' ', $not) . ' ';

    }

    if(!empty($_GET['require_words']))

    {

      $req = explode(' ', $_GET['require_words']);

      foreach ( $req as $i => $foo )

      {

        $req[$i] = '+' . $req[$i];

      }

      $q .= implode(' ', $req) . ' ';

    }

  }

  $q = trim($q);

  $template->header();

  $qin = ( isset($q) ) ? str_replace('"', '\"', htmlspecialchars($q)) : '';

  $search_form = '<form action="' . makeUrlNS('Special', 'Search') . '">

  <input type="text" tabindex="1" name="q" size="50" value="' . $qin . '" />&nbsp;<input tabindex="2" type="submit" value="Search" />&nbsp;<a href="' . makeUrlNS('Special', 'Search') . '">Advanced search</a>

  ' . ( $session->auth_level > USER_LEVEL_MEMBER ? '<input type="hidden" name="auth" value="' . $session->sid_super . '" />' : '' ) . '

  </form>';

  if ( !empty($q) )

  {

    $search_start = microtime_float();

    $results = perform_search($q, $warn, ( isset($_GET['match_case']) ));

    $warn = array_unique($warn);

    if ( file_exists( ENANO_ROOT . '/themes/' . $template->theme . '/search-result.tpl' ) )

    {

      $parser = $template->makeParser('search-result.tpl');

    }

    else

    {

      $tpl_code = <<<LONGSTRING

      <!-- Start search result -->

      <div class="search-result">

        <p>

         <h3><a href="{RESULT_URL}"><span class="search-result-annotation">{PAGE_NOTE}</span>{PAGE_TITLE}</a></h3>

          {PAGE_TEXT}

          <span class="search-result-url">{PAGE_URL}</span> - 

          <!-- BEGINNOT special_page --><span class="search-result-info">{PAGE_LENGTH} {PAGE_LENGTH_UNIT}</span> -<!-- END special_page --> 

          <span class="search-result-info">Relevance: {RELEVANCE_SCORE}%</span>

        </p>

      </div>

      <!-- Finish search result -->

LONGSTRING;

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

    }

    foreach ( $results as $i => $_ )

    {

      $result =& $results[$i];

      $result['page_text'] = str_replace(array('<highlight>', '</highlight>'), array('<span class="search-term">', '</span>'), $result['page_text']);

      if ( !empty($result['page_text']) )

        $result['page_text'] .= '<br />';

      $result['page_name'] = str_replace(array('<highlight>', '</highlight>'), array('<span class="title-search-term">', '</span>'), $result['page_name']);

      if ( $result['page_length'] >= 1048576 )

      {

        $result['page_length'] = round($result['page_length'] / 1048576, 1);

        $length_unit = 'MB';

      }

      else if ( $result['page_length'] >= 1024 )

      {

        $result['page_length'] = round($result['page_length'] / 1024, 1);

        $length_unit = 'KB';

      }

      else

      {

        $length_unit = 'bytes';

      }

      $url = makeUrlComplete($result['namespace'], $result['page_id']);

      $url = preg_replace('/\?.+$/', '', $url);

      $parser->assign_vars(array(

         'PAGE_TITLE' => $result['page_name'],

         'PAGE_TEXT' => $result['page_text'],

         'PAGE_LENGTH' => $result['page_length'],

         'RELEVANCE_SCORE' => $result['score'],

         'RESULT_URL' => makeUrlNS($result['namespace'], $result['page_id'], false, true),

         'PAGE_LENGTH_UNIT' => $length_unit,

         'PAGE_URL' => $url,

         'PAGE_NOTE' => ( isset($result['page_note']) ? $result['page_note'] . ' ' : '' )

        ));

      $has_content = ( $result['namespace'] == 'Special' );

      $code = $plugins->setHook('search_global_results');

      foreach ( $code as $cmd )

      {

        eval($cmd);

      }

      $parser->assign_bool(array(

          'special_page' => $has_content

        ));

      $result = $parser->run();

    }

    unset($result);

    $per_page = 10;

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

    $start_string = $start + 1;

    $per_string = $start_string + $per_page - 1;

    $num_results = count($results);

    if ( $per_string > $num_results )

      $per_string = $num_results;

    $search_time = microtime_float() - $search_start;

    $search_time = round($search_time, 3);

    $q_trim = ( strlen($q) > 30 ) ? substr($q, 0, 27) . '...' : $q;

    $q_trim = htmlspecialchars($q_trim);

    $result_string = ( count($results) > 0 ) ? "Results <b>$start_string</b> - <b>$per_string</b> of about <b>$num_results</b> for <b>" . $q_trim . "</b> in {$search_time}s." : 'No results.';

    echo '<div class="search-hibar">

            <div style="float: right;">

              ' . $result_string . '

            </div>

            <b>Site search</b>

          </div>

          <div class="search-lobar">

            ' . $search_form . '

          </div>';

    if ( count($warn) > 0 )

    {

      echo '<div class="warning-box" style="margin: 10px 0 0 0;">';

      echo '<b>Some problems were encountered during your search.</b><br />

            There was a problem with your search query, and as a result there may be a reduced number of search results.';

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

      echo '</div>';

    }

    if ( count($results) > 0 )

    {

      $html = paginate_array(

          $results,

          count($results),

          makeUrlNS('Special', 'Search', 'q=' . str_replace('%', '%%', htmlspecialchars(urlencode($q))) . '&start=%s'),

          $start,

          $per_page

        );

      echo $html;

    }

    else

    {

      // No results for the search

      echo '<h3 style="font-weight: normal;">Your search for <b>"' . htmlspecialchars($q) . '"</b> didn\'t turn up any results.</h3>';

      echo '<p>There are a few things you can try:</p>';

      echo '<ul>

              <li>Were you looking for a specific Special page? Special pages are not searchable. You may want to see a <a href="' . makeUrlNS('Special', 'SpecialPages') . '">list of special pages</a>.</li>

              <li>If you have the appropriate permissions, you can <a href="' . makeUrl($q) . '#do:edit">start the ' . htmlspecialchars($q) . ' page</a>.</li>

              <li>Try using fewer keywords. You can get broader results if you remove quotes from your search query.</li>

              <li>Did your search trigger any warnings? Sometimes a search can be cancelled if there aren\'t any terms in a search query that are 4 characters or greater in length.</li>

            </ul>';

    }

    $code = $plugins->setHook('search_results');

    foreach ( $code as $cmd )

    {

      eval($cmd);

    }

  }

  else

  {

    ?>

    <form action="<?php echo makeUrl($paths->page); ?>" method="get">

      <?php if ( urlSeparator == '&' ): ?>

        <input type="hidden" name="title" value="<?php echo $paths->nslist['Special'] . 'Search'; ?>" />

      <?php 

      echo ( $session->auth_level > USER_LEVEL_MEMBER ? '<input type="hidden" name="auth" value="' . $session->sid_super . '" />' : '' );

      endif; ?>

      <div class="tblholder">

        <table border="0" style="width: 100%;" cellspacing="1" cellpadding="4">

          <tr><th colspan="2">Advanced Search</th></tr>

          <tr>

            <td class="row1">Search for pages with <b>any of these words</b>:</td>

            <td class="row1"><input type="text" name="words_any" size="40" /></td>

          </tr>

          <tr>

            <td class="row2">with <b>this exact phrase</b>:</td>

            <td class="row2"><input type="text" name="exact_phrase" size="40" /></td>

          </tr>

          <tr>

            <td class="row1">with <b>none of these words</b>:</td>

            <td class="row1"><input type="text" name="exclude_words" size="40" /></td>

          </tr>

          <tr>

            <td class="row2">with <b>all of these words</b>:</td>

            <td class="row2"><input type="text" name="require_words" size="40" /></td>

          </tr>

          <tr>

            <td class="row1">

              <label for="chk_case">Case-sensitive search:</label>

            </td>

            <td class="row1">

              <input type="checkbox" name="match_case" id="chk_case" />

            </td>

          </tr>

          <tr>

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

              <input type="submit" name="do_search" value="Search" />

            </td>

          </tr>

        </table>

      </div>

    </form>

    <?php

  }

  $template->footer();

}

?>