// FIXME: This doesn't currently prohibit viewing of aggregate logs that might include a page for which

  // 

  // FIXME: This is a real hack. We're trying to get permissions on a random non-existent article, which

  // effectively forces calculation to occur based on site-wide permissions.

  $pid = '';

  for ( $i = 0; $i < 32; $i++ )

  {

    $pid .= chr(mt_rand(32, 126));

  }

  $perms = $session->fetch_page_acl($pid, 'Article');

  $perms_changed = false;

  $fmt = 'full';

  if ( $params = $paths->getAllParams() )

    if ( $params === 'AddFilter' && !empty($_POST['type']) && !empty($_POST['value']) )

    {

      $type = $_POST['type'];

      if ( $type == 'within' )

        $value = strval(intval($_POST['value']['within'])) . $_POST['value']['withinunits'];

      else

        $value = $_POST['value'][$type];

      $value = str_replace('/', '.2f', sanitize_page_id($value));

      if ( empty($value) || ( $type == 'within' && intval($value) == 0 ) )

      {

        $adderror = $lang->get('log_err_addfilter_field_empty');

      }

      $append = ( !empty($_POST['existing_filters']) ) ? "{$_POST['existing_filters']}/" : '';

      $url = makeUrlNS('Special', "Log/{$append}{$type}={$value}");

      redirect($url, '', '', 0);

    }

    $params = explode('/', $params);

      $param = str_replace('.2f', '/', dirtify_page_id($param));

      if ( preg_match('/^([a-z!]+)=(.+?)$/', $param, $match) )

          case 'fmt':

            switch($value)

            {

              case 'barenaked':

              case 'ajax':

                $fmt = 'naked';

                $output = new Output_Naked();

                break;

            }

            break;

          case 'page':

            if ( get_class($perms) == 'sessionManager' )

            {

              unset($perms);

              list($pid, $ns) = RenderMan::strToPageID($value);

              $perms = $session->fetch_page_acl($pid, $ns);

              if ( !$perms->get_permissions('history_view') )

              {

                die_friendly($lang->get('etc_access_denied_short'), '<p>' . $lang->get('log_err_access_denied') . '</p>');

              }

            }

            // no break here on purpose

            try

            {

              $log->add_criterion($name, $value);

            }

            catch ( Exception $e )

            {

            }

  if ( !$perms->get_permissions('history_view') )

  {

    die_friendly($lang->get('etc_access_denied_short'), '<p>' . $lang->get('log_err_access_denied') . '</p>');

  }

  $result_url = makeUrlNS('Special', 'Log/' . rtrim(preg_replace('|/?resultpage=([0-9]+)/?|', '/', $paths->getAllParams()), '/') . '/resultpage=%s', false, true);

  // breadcrumbs

  if ( $fmt != 'naked' )

    echo '<div class="breadcrumbs" style="font-weight: normal;" id="log-breadcrumbs">';

    echo speciallog_generate_breadcrumbs($log->get_criteria());

    echo '</div>';

  // form

  ?>

  <!-- Begin filter add form -->

  <form action="<?php echo makeUrlNS('Special', 'Log/AddFilter', false, true); ?>" method="post" enctype="multipart/form-data">

    <?php

    // serialize parameters

    $params_pre = rtrim(preg_replace('#/?resultpage=[0-9]+/?#', '/', $paths->getAllParams()), '/');

    echo '<input type="hidden" name="existing_filters" value="' . htmlspecialchars($params_pre) . '" />';

    ?>

    <script type="text/javascript">//<![CDATA[

      addOnloadHook(function()

        {

          load_component('jquery');

          $('#log_addfilter_select').change(function()

            {

              var value = $(this).val();

              $('.log_addfilter').hide();

              $('#log_addform_' + value).show();

            });

          $('#log_addform_' + $('#log_addfilter_select').val()).show();

        });

    // ]]>

    </script>

    <?php

    if ( isset($adderror) )

    {

      echo '<div class="error-box">' . $adderror . '</div>';

    }

    ?>

    <div class="tblholder">

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

      <tr>

        <th colspan="2">

          <?php echo $lang->get('log_heading_addfilter'); ?>

        </th>

      </tr>

      <tr>

      <td class="row1" style="width: 50%; text-align: right;">

          <select name="type" id="log_addfilter_select">

            <option value="user"><?php echo $lang->get('log_form_filtertype_user'); ?></option>

            <option value="page"><?php echo $lang->get('log_form_filtertype_page'); ?></option>

            <option value="within"><?php echo $lang->get('log_form_filtertype_within'); ?></option>

            <option value="action"><?php echo $lang->get('log_form_filtertype_action'); ?></option>

          </select>

        </td>

        <td class="row1" style="width: 50%; text-align: left;">

          <div class="log_addfilter" id="log_addform_user">

            <input type="text" class="autofill username" name="value[user]" size="40" />

          </div>

          <div class="log_addfilter" id="log_addform_page">

            <input type="text" class="autofill page" name="value[page]" size="40" />

          </div>

          <div class="log_addfilter" id="log_addform_within">

            <input type="text" name="value[within]" size="7" />

            <select name="value[withinunits]">

              <option value="d"><?php echo $lang->get('etc_unit_days'); ?></option>

              <option value="w"><?php echo $lang->get('etc_unit_weeks'); ?></option>

              <option value="m"><?php echo $lang->get('etc_unit_months'); ?></option>

              <option value="y"><?php echo $lang->get('etc_unit_years'); ?></option>

            </select>

          </div>

          <div class="log_addfilter" id="log_addform_action">

            <select name="value[action]">

              <option value="rename"><?php echo $lang->get('log_formaction_rename'); ?></option>

              <option value="create"><?php echo $lang->get('log_formaction_create'); ?></option>

              <option value="delete"><?php echo $lang->get('log_formaction_delete'); ?></option>

              <option value="protect"><?php echo $lang->get('log_action_protect'); ?></option>

              <option value="edit"><?php echo $lang->get('log_action_edit'); ?></option>

            </select>

          </div>

        </td>

      </tr>

      <tr>

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

          <input type="submit" value="<?php echo $lang->get('log_btn_add_filter'); ?>" />

        </th>

      </tr>

    </table>

    </div>

  </form>

  <!-- End filter add form -->

  <?php

  // start of actual log output area

  if ( $fmt != 'naked' )

  {

    echo '<div id="log-body">';

  }

  if ( $rowcount > 0 )

  {

    // we have some results, show pagination + result list

    echo '<h3 style="float: left;">' . $lang->get('log_heading_logdisplay') . '</h3>';

    echo $paginator;

    // padding

    echo '<div style="height: 10px;"></div>';

    foreach ( $dataset as $row )

    {

      echo LogDisplay::render_row($row) . '<br />';

    }

    echo $paginator;

  }

  else

  {

    // no results

    echo '<h2 class="emptymessage">' . $lang->get('log_msg_no_results') . '</h2>';

  }

  if ( $fmt != 'naked' )

    echo '</div> <!-- div#log-body -->';

function speciallog_generate_breadcrumbs($criteria)

{

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

  global $lang;

  if ( count($criteria) == 0 )

  {

    return $lang->get('log_msg_no_filters');

  }

  $html = array();

  foreach ( $criteria as $criterion )

  {

    list($type, $value) = $criterion;

    switch($type)

    {

      case 'user':

        $rank_info = $session->get_user_rank($value);

        $user_link = '<a href="' . makeUrlNS('User', $value, false, true) . '" style="' . $rank_info['rank_style'] . '" title="' . htmlspecialchars($lang->get($rank_info['rank_title'])) . '">';

        $user_link .= htmlspecialchars(str_replace('_', ' ', $value)) . '</a>';

        $crumb = $lang->get('log_breadcrumb_author', array('user' => $user_link));

        break;

      case 'page':

        $crumb = $lang->get('log_breadcrumb_page', array('page' => '<a href="' . makeUrl($value, false, true) . '">' . htmlspecialchars(get_page_title($value)) . '</a>'));

        break;

      case 'action':

        $crumb = $lang->get('log_breadcrumb_action', array('action' => htmlspecialchars($lang->get("log_action_{$value}"))));

        break;

      case 'within':

        $value = intval($value);

        if ( $value % 31536000 == 0 )

        {

          $n = $value / 31536000;

          $value = "$n " . $lang->get( $n > 1 ? 'etc_unit_years' : 'etc_unit_year' );

        }

        else if ( $value % 2592000 == 0 )

        {

          $n = $value / 2592000;

          $value = "$n " . $lang->get( $n > 1 ? 'etc_unit_months' : 'etc_unit_month' );

        }

        else if ( $value % 604800 == 0 )

        {

          $n = $value / 604800;

          $value = "$n " . $lang->get( $n > 1 ? 'etc_unit_weeks' : 'etc_unit_week' );

        }

        else if ( $value % 86400 == 0 )

        {

          $n = $value / 86400;

          $value = "$n " . $lang->get( $n > 1 ? 'etc_unit_days' : 'etc_unit_day' );

        }

        else

        {

          $value = "$value " . $lang->get( $value > 1 ? 'etc_unit_seconds' : 'etc_unit_second' );

        }

        $crumb = $lang->get('log_breadcrumb_within', array('time' => $value));

        break;

    }

    $html[] = $crumb . ' ' . speciallog_crumb_remove_link($criterion);

  }

  return implode(' » ', $html);

}

function speciallog_crumb_remove_link($criterion)

{

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

  global $lang;

  list($type, $value) = $criterion;

  $params = explode('/', dirtify_page_id($paths->getAllParams()));

  foreach ( $params as $i => $param )

  {

    if ( $param === "$type=$value" )

    {

      unset($params[$i]);

      break;

    }

    else if ( $type === 'within' )

    {

      list($ptype, $pvalue) = explode('=', $param);

      if ( $ptype !== 'within' )

        continue;

      $lastchar = substr($pvalue, -1);

      $amt = intval($pvalue);

      switch($lastchar)

      {

        case 'd':

          $amt = $amt * 86400;

          break;

        case 'w':

          $amt = $amt * 604800;

          break;

        case 'm':

          $amt = $amt * 2592000;

          break;

        case 'y':

          $amt = $amt * 31536000;

          break;

      }

      if ( $amt === $value )

      {

        unset($params[$i]);

        break;

      }

    }

  }

  if ( count($params) > 0 )

  {

    $params = implode('/', $params);

    $url = makeUrlNS('Special', "Log/$params", false, true);

  }

  else

  {

    $url = makeUrlNS('Special', "Log", false, true);

  }

  return '<sup><a href="' . $url . '">(x)</a></sup>';

}