<?php

/*

 * Copyright 2010 Nathan Gelderloos, Ethan Zonca, Nathan Phillip Brink

 *

 * This file is part of SlatePermutate.

 *

 * SlatePermutate is free software: you can redistribute it and/or modify

 * it under the terms of the GNU Affero General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * SlatePermutate 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 Affero General Public License for more details.

 *

 * You should have received a copy of the GNU Affero General Public License

 * along with SlatePermutate.  If not, see <http://www.gnu.org/licenses/>.

 */

  include_once 'inc/class.page.php';

  $scripts = array('jQuery','jQueryUI'); 

  $adminpage = new page('Administration',$scripts);

  if(!isset($admin_pass)) {

    echo "<p>Administration password not configured. See config.inc for more information.</p>";

    $adminpage->foot();

  }

  // Force authentication

  if (!isset($_SERVER['PHP_AUTH_USER']) || $_SERVER['PHP_AUTH_PW'] != $admin_pass) {

    header('WWW-Authenticate: Basic realm="My Realm"');

    header('HTTP/1.0 401 Unauthorized');

    echo '<p>You must authenticate to view this page.</p>';

    $adminpage->foot();

    exit;

  }

  function isBeforeDate($first, $reference) {

   return true; 

  }

  function emptySavedDir($todate = null) {

    // Empty the saved_schedules directory

    $dir = "saved_schedules";

    if(!is_dir($dir)) {

      echo "<p><pre>{$dir}</pre> is not a valid directory!";

      return;

    }

    // Do this the new fun php5 OO-way

    foreach(new DirectoryIterator($dir) as $file) {

      $isBeforeDate = isBeforeDate($file->getCTime, $todate);

      if(!$todate || $isBeforeDate) {

        if(is_numeric($file->getFilename())){

          // unlink($dir . '/' . $file->getFilename());

          echo "<p>Erased file: " . $dir . '/' . $file->getFilename() . "</p>";

        } 

      }

    }

  }

  function checkAction() {

    $result = '';

    if(isset($_GET['rehash'])) {

      // Run the rehash

      $result = 'Rehash Complete'; 

    }

    else if(isset($_GET['purgetodate'])) {

      // Purge saved schedule cache up to date

      emptySavedDir($_GET['purgetodate']);

      $result = 'Purged all saved schedules up to ' . $_GET['purgetodate'];

    }

    else if(isset($_GET['purge'])) {

      // Purge the saved schedule cache

      emptySavedDir();

      $result = 'Purge Complete';

    }

    return $result;

  }

  function getLastRehash(){

    $stats = stat("cache/schools");

    if(!$stats){

      return "never";

    }

    return date("F j, Y, g:i a", $stats[9]);

  }

  function getSchools() {

    if(!stat("cache/schools")){

      return false;

    }

    $schoolsArr = unserialize(file_get_contents("cache/schools"));

    return $schoolsArr;

  }

  function schoolsDropList(){

    $schools = getSchools();

    echo '<select>';

    foreach($schools['list'] as $school){

      if(!$school['name'] != "Generic College") {

        echo '<option ';

        if(!$school['crawled']) {

          echo 'class="bold" ';

        }

        echo 'value="' . $school['name'] . '">';

        echo $school['name'];

        echo "</option>";

      }

    }

    echo "</select>";

  }

  function getNumSaved(){

    return file_get_contents("saved_schedules/lastid");

  }

?>

<?php /* Check if authorized */ 

  $res = checkAction();

  if($res != '') {

    echo '<p><em>' . $res . '</em> <a href="admin.php">(x)</a></p>';

  }

?>

<!-- Move to pagegen class instantiation -->

<script>

	$(function() {

		$( "#datepicker" ).datepicker();

                $( "#datepicker" ).datepicker( "option", "dateFormat", "yy-mm-dd" );

	});

</script>

<h3>Update</h3>

<p>You are currently running version VERSION. The latest available release is VERSION.</p>

<h3>Rehash</h3>

<p>Last full rehash ocurred on  <?php echo getLastRehash() ?>.</p>

<ul>

  <li><a href="admin.php?rehash">Rehash All Institutions</a></li>

  <li><?php schoolsDropList(); ?> <a href="admin.php?rehash">Rehash Institution</a> </li>

</ul>

<h3>Purge</h3>

<p>The cache currently holds <?php echo getNumSaved(); ?> schedules.</p>

<ul>

  <li><a href="admin.php?purge">Purge Entire Cache</a></li>

  <li><form action="admin.php">Purge cache up to <input type="text" name="purgetodate" size="8" id="datepicker"/><input type="submit" value="Go&raquo;" /></form></li>

</ul>

<?php

$adminpage->foot();