<?php

/*

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

 * Copyright (C) 2006-2008 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.

 */

// Cache manager - regenerate and clear various cached values

function page_Admin_CacheManager()

{

  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;

  }

  // validation/actions

  if ( isset($_POST['refresh']) || isset($_POST['clear']) )

  {

    $success = false;

    $target = ( isset($_POST['refresh']) ) ? $_POST['refresh'] : $_POST['clear'];

    $do_refresh = isset($_POST['refresh']);

    switch ( $target )

    {

      case 'page':

        $success = $cache->purge('page_meta');

        if ( $do_refresh && $success )

          $success = $paths->update_metadata_cache();

        break;

      case 'ranks':

        $success = $cache->purge('ranks');

        if ( $do_refresh && $success )

          $success = generate_cache_userranks();

        break;

      case 'sidebar':

        $success = $cache->purge('anon_sidebar');

        break;

      case 'plugins':

        $success = $cache->purge('plugins');

        if ( $do_refresh && $success )

          $success = $plugins->generate_plugins_cache();

        break;

      case 'template':

        if ( $dh = opendir(ENANO_ROOT . '/cache') )

        {

          while ( $file = @readdir($dh) )

          {

            $fullpath = ENANO_ROOT . "/cache/$file";

            // we don't want to mess with directories

            if ( !is_file($fullpath) )

              continue;

            if ( preg_match('/\.(?:tpl|css)\.php$/', $file) )

            {

              unlink($fullpath);

            }

          }

          $success = true;

        }

        break;

      case 'aes':

        $success = @unlink(ENANO_ROOT . '/cache/aes_decrypt.php');

        break;

      case 'lang':

        if ( $dh = opendir(ENANO_ROOT . '/cache') )

        {

          while ( $file = @readdir($dh) )

          {

            $fullpath = ENANO_ROOT . "/cache/$file";

            // we don't want to mess with directories

            if ( !is_file($fullpath) )

              continue;

            if ( preg_match('/^lang_json_(?:[a-f0-9]+?)\.php$/', $file) || preg_match('/^(?:cache_)?lang_(?:[0-9]+?)\.php$/', $file) )

              unlink($fullpath);

          }

          $success = true;

        }

        if ( $do_refresh && $success )

        {

          // for each language in the database, call regen_caches()

          $q = $db->sql_query('SELECT lang_id FROM ' . table_prefix . 'language;');

          if ( !$q )

            $db->_die();

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

          {

            $lang_local = ( $row['lang_id'] == $lang->lang_id ) ? $lang : new Language($row['lang_id']);

            $success = $lang_local->regen_caches();

            if ( !$success )

              break 2;

          }

        }

        break;

      case 'js':

        if ( $dh = opendir(ENANO_ROOT . '/cache') )

        {

          while ( $file = @readdir($dh) )

          {

            $fullpath = ENANO_ROOT . "/cache/$file";

            // we don't want to mess with directories

            if ( !is_file($fullpath) )

              continue;

            // compressed javascript

            if ( preg_match('/^jsres_(?:[A-z0-9_-]+)\.js\.json$/', $file) )

              unlink($fullpath);

            // tinymce stuff

            else if ( preg_match('/^tiny_mce_(?:[a-f0-9]+)\.gz$/', $file) )

              unlink($fullpath);

          }

          $success = true;

        }

        break;

      case 'thumbs':

        if ( $dh = opendir(ENANO_ROOT . '/cache') )

        {

          while ( $file = @readdir($dh) )

          {

            $fullpath = ENANO_ROOT . "/cache/$file";

            // we don't want to mess with directories

            if ( !is_file($fullpath) )

              continue;

            if ( preg_match('/^(?:[a-z0-9\._,-]+)-(?:[0-9]{10})-[0-9]+x[0-9]+\.([a-z0-9_-]+)$/i', $file) )

              unlink($fullpath);

          }

          $success = true;

        }

        break;

      case 'all':

        $success = purge_all_caches();

        if ( $do_refresh )

        {

          //

          // refresh all static (non-incremental) caches

          //

          // pages

          $success = $paths->update_metadata_cache();

          if ( !$success )

            break;

          // user ranks

          $success = generate_cache_userranks();

          if ( !$success )

            break;

          // plugins

          $success = $plugins->generate_plugins_cache();

          if ( !$success )

            break;

          // languages

          $q = $db->sql_query('SELECT lang_id FROM ' . table_prefix . 'language;');

          if ( !$q )

            $db->_die();

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

          {

            $lang_local = ( $row['lang_id'] == $lang->lang_id ) ? $lang : new Language($row['lang_id']);

            $success = $lang_local->regen_caches();

            if ( !$success )

              break 2;

          }

        }

        break;

      default:

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

        foreach ( $code as $cmd )

        {

          eval($cmd);

        }

        break;

    }

    if ( $success )

    {

      echo '<div class="info-box">' . $lang->get('acpcm_msg_action_success') . '</div>';

    }

    else

    {

      echo '<div class="error-box">' . $lang->get('acpcm_err_action_failed') . '</div>';

    }

  }

  else if ( isset($_POST['save']) )

  {

    $config_value = ( isset($_POST['cache_thumbs']) ) ? '1' : '0';

    setConfig('cache_thumbs', $config_value);

    echo '<div class="info-box">' . $lang->get('acpcm_msg_action_success') . '</div>';

  }

  echo '<h3><img alt=" " src="' . scriptPath . '/images/icons/applets/cachemanager.png" />&nbsp;&nbsp;&nbsp;' . $lang->get('acpcm_heading_main') . '</h3>';

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

  echo '<div class="warning-box">' . $lang->get('acpcm_msg_refresh_warning') . '</div>';

  acp_start_form();

  ?>

  <div class="tblholder">

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

      <!-- HEADER -->

      <tr>

        <th colspan="2">

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

        </th>

      </tr>

      <!-- ENABLE CACHE -->

      <tr>

        <td class="row1" colspan="2">

          <label>

            <input type="checkbox" name="cache_thumbs"<?php if ( getConfig('cache_thumbs') == '1' ) echo ' checked="checked"'; ?> />

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

          </label>

          <br />

          <small>

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

          </small>

        </td>

      </tr>

      <!-- CLEAR ALL -->

      <tr>

      <td class="row2" style="width: 120px; text-align: center;">

          <button name="clear" value="all"><?php echo $lang->get('acpcm_btn_clear_all'); ?></button>

        </td>

        <td class="row2">

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

        </td>

      </tr>

      <?php

      // if caching is disabled, might as well break off here

      if ( getConfig('cache_thumbs') == '1' ):

      ?>

      <!-- REFRESH ALL -->

      <tr>

        <td class="row1" style="text-align: center;">

          <button name="refresh" value="all"><?php echo $lang->get('acpcm_btn_refresh_all'); ?></button>

        </td>

        <td class="row1">

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

        </td>

      </tr>

      <!-- INDIVIDUAL CACHES -->

      <tr>

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

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

        </th>

      </tr>

      <?php

      $class = 'row2';

      $cache_list = array('page', 'ranks', 'sidebar', 'plugins', 'template', 'aes', 'lang', 'js', 'thumbs');

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

      foreach ( $code as $cmd )

      {

        eval($cmd);

      }

      foreach ( $cache_list as $target )

      {

        $class = ( $class == 'row1' ) ? 'row2' : 'row1';

        ?><tr>

        <td class="<?php echo $class; ?>" style="text-align: center;">

          <button name="refresh" value="<?php echo $target; ?>"<?php if ( in_array($target, array('template', 'sidebar', 'aes', 'js', 'thumbs')) ) echo ' disabled="disabled"'; ?>>

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

          </button>

          <button name="clear" value="<?php echo $target; ?>">

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

          </button>

        </td>

        <td class="<?php echo $class; ?>">

          <b><?php echo $lang->get("acpcm_cache_{$target}_desc_title"); ?></b> &ndash;

          <?php echo $lang->get("acpcm_cache_{$target}_desc_body"); ?>

        </td>

        </tr>

      <?php

      }

      // getConfig('cache_thumbs') == '1'

      endif;

      ?>

      <!-- SAVE CHANGES -->

      <tr>

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

          <input type="submit" name="save" value="<?php echo $lang->get('etc_save_changes'); ?>" style="font-weight: bold;" />

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

        </th>

      </tr>

    </table>

  </div>

  <?php

  echo '</form>';

}

?>