define('SP_PACKAGE_NAME', 'slate_permutate');

define('SP_PACKAGE_VERSION', '0.1_pre');

define('SP_PACKAGE_STRING', SP_PACKAGE_NAME . '-' . SP_PACKAGE_VERSION);

/*

 * Set up include() path for user-supplied libs (in case if his system

 * doesn't have libs, such as phpcaptcha

 * (securimage/securimage.php)). Users would store such libs in /libs.

 *

 * Coding note: dirname(dirname('a/b/c')) returns 'a'. This is a

 * similar effect to dirname('a/b/c') . DIRECTORY_SEPARATOR . '..'.

 */

set_include_path(get_include_path() . PATH_SEPARATOR . dirname(dirname(__FILE__)) . DIRECTORY_SEPARATOR . 'libs');

/**

 * Not sure if there's a better place for this... it'd be a pita to

 * make a new include file like doconfig.inc but maybe that'll make

 * sense soon.

 */

/* defaults */

$clean_urls = FALSE;

$ga_trackers = array();

$ga_conversions = array();

$feedback_emails = array('ez@ethanzonca.com, ngelderloos7@gmail.com, ohnobinki@ohnopublishing.net');

$use_captcha = FALSE;

$admin_enable_purge = FALSE;

$qtips_always = FALSE;

$input_warning_banner = FALSE;

$feedback_disk_log = FALSE;

$config_inc = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'config.inc';

if (file_exists($config_inc)) {

  require_once($config_inc);

}

/**

 * \brief

 *   Produces XHTML output for the user and helps with other browser

 *   interaction.

 *

 * Supports styled XHTML pages, modular script inclusion, and other

 * various features.

 */

class page

{

  /* Site-wide configuration options */

  private $doctype = 'html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"';

  private $htmlargs = 'xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"';

  private $pageGenTime = 0;

  private $xhtml = FALSE;

  /* Scripts and styles */

  private $headCode = array();

  private $trackingcode = ''; // Tracking code

  private $ga_conversions_code = ''; // Conversion tracking code

  private $pagetitle = ''; // Title of page

  private $scripts = array(); // Scripts to include on page

  private $meta;

  /* the current school. See get_school(). */

  private $school;

  private $semester;

  /*

   * Whether or not the user should be presented with the option to

   * change the school profile or semester.

   */

  private $school_semester_constant;

  /**

   * \brief

   *   Construct a new page.

   *

   * Only to be called by page::page_construct(). Use that function

   * instead of the new keyword.

   *

   * \see page::page_construct()

   *

   * \param $ntitle

   *   Must be a valid HTML string (i.e., escaped with htmlentities()).

   * \param $nscripts

   *   An array of strings identifying the scripts to include for this page.

   * \param $options

   *   An array containing any of the following keys:

   *     - 'school': The school to use instead of the autodetected one.

   *     - 'semester': The semester to use instead of the autodetected one.

   */

  protected function __construct($ntitle, $nscripts = array(), $immediate = TRUE, array $options = array())

  {

    /* Begin tracking generation time */

    $this->headCode['outputStyle'] = '<link rel="stylesheet" href="styles/output.css" type="text/css" media="screen" charset="utf-8" />'; 

    $this->headCode['gliderHeadcode'] = '<link rel="stylesheet" href="styles/glider.css" type="text/css" media="screen" charset="utf-8" />'; 

    $this->headCode['uiTabsKeyboard'] = '<script type="text/javascript" src="scripts/uiTabsKeyboard.js"></script>';

    $this->headCode['displayTables'] = '<script type="text/javascript" src="scripts/displayTables.js"></script>';

    $this->pagetitle = $ntitle;

    $this->scripts = $nscripts;

    $this->meta = array(

      'msapplication-starturl' => self::uri_resolve(''),

      'msapplication-task' => 'name=Create Schedule; action-uri=' . self::uri_resolve('input.php') . '; icon-uri=' . self::uri_resolve('images/favicon_96.png'),

      'msapplication-tooltip' => 'Find the semester schedule which works for you!',

    );

   /* Compliant browsers which care, such as gecko, explicitly request xhtml: */

   if(empty($_SERVER['HTTP_ACCEPT'])  /* then the browser doesn't care :-) */

      || strpos($_SERVER['HTTP_ACCEPT'], 'application/xhtml+xml') !== FALSE)

       $this->xhtml = TRUE;

   if (count($ga_trackers))

     {

       $ga_www = 'http://www.';

       if ($_SERVER['SERVER_PORT'] != 80)

	 $ga_www = 'https://ssl.';

       $this->trackingcode = '<script type="text/javascript" src="' . $ga_www . 'google-analytics.com/ga.js" />' . "\n"

	 . $this->trackingcode

	 . '  <script type="text/javascript">' . "\n"

	 . '  ' . ($this->xhtml ? '<![CDATA[' : '') . "\n"

	 . "     var mytrackers = new Array();";

       $i = 0;

       foreach ($ga_trackers as $ga_tracker)

	 {

	   $this->trackingcode .= "\n"

	     . '      mytrackers[' . $i . '] = _gat._getTracker(\'' . $ga_tracker . "');\n"

	     . '      mytrackers[' . $i . "]._trackPageview();\n";

	 }

       $this->trackingcode .= '  ' . ($this->xhtml ? ']]>'       : '') . "\n"

	 . "  </script>\n";

     }

    self::session_start();

    /* everything that needs sessions started to work: */

    if (empty($options['school']))

      $options['school'] = school_load_guess();

    $this->school = $options['school'];

    if (empty($options['semester']))

      $options['semester'] = school_semester_guess($this->school);

    $this->semester = $options['semester'];

    if (!isset($options['school_semester_constant']))

      $options['school_semester_constant'] = TRUE;

    $this->school_semester_constant = (bool)$options['school_semester_constant'];

    if($immediate

       && $ntitle != "NOHEAD")

      $this->head();

 }

  /**

   * \brief

   *   Instantiate a new page for the caller.

   *

   * The caller must explicitly call the page::head() function upon

   * the value that is returned. No implicit actions are supported

   * anymore.

   *

   * \param $title

   *   The title of the page. Must be completely UTF-8 (will be

   *   escaped for you with htmlentitites()).

   * \param $scripts

   *   A list of scripts which the page desires to be included in the

   *   <head /> of the page. Should this param just be moved to the

   *   page::head() function?

   * \param $options

   *   An array containing any of the following keys:

   *     - 'school': The school to use instead of the autodetected one.

   *     - 'semester': The semester to use instead of the autodetected one.

   *     - 'school_semester_constant': Whether the options to change

   *        the current school and semester should be hidden. TRUE by

   *        default.

   */

  public static function page_create($title, array $scripts = array(), array $options = array())

  {

    return new page(htmlentities($title, ENT_QUOTES, 'UTF-8'), $scripts, FALSE, $options);

  }

  /**

   * \brief

   *   Adds some headcode to this page.

   *

   * \param $key

   *   The key to register this headcode under.

   *   The base URI for the current page.

   * \param $query

   *   The querystring to canonicalize on.

   */

  public function canonize($uri, array $query = array())

  {

    $query_string = '';

    $uri_full = $uri;

    if (!empty($query))

      {

	ksort($query);

	$query_members = array();

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

	  $query_members[] = rawurlencode($key) . '=' . rawurlencode($value);

	$query_string = implode('&', $query_members);

	$uri_full .= '?' . $query_string;

      }

    /* Detect if we are at the canonical location or not... */

    list($base_request_uri) = explode('?', $_SERVER['REQUEST_URI'], 2);

    $base_request_uri = substr($_SERVER['REQUEST_URI'], strrpos($base_request_uri, '/') + 1);

    if ($base_request_uri != $uri_full)

      /* We are not canonical, redirect. */

      $this->redirect($uri_full);

    /* Mention that this is a canonical URI with <link rel="canonical"/> */

    $this->headcode_add('link_rel_canonical', '<link rel="canonical" href="'

			. htmlentities(self::uri_resolve($uri_full), ENT_QUOTES) . '"'

			. ($this->xhtml ? '/>' : '></link>'),

			TRUE);

  }

  /**

   * \brief

   *   Output the HTML header for a page, including <!DOCTYPE>, <head />, and opening structure

   */

  public function head()

  {

    if ($this->xhtml) {

       header('Content-Type: application/xhtml+xml; charset=utf-8');

      echo '<?xml version="1.0" encoding="utf-8"?>' . PHP_EOL;

    }

    else

      header('Content-Type: text/html; charset=utf-8');

    echo '<!DOCTYPE ' . $this->doctype . '>'. PHP_EOL .

	  '<html ' . $this->htmlargs . '>'. PHP_EOL .

	  '  <head>'. PHP_EOL .

          '    <link rel="stylesheet" href="styles/general.css" type="text/css" media="screen" charset="utf-8" />'.  PHP_EOL .

	  '    <link rel="stylesheet" type="text/css" media="print" href="styles/print.css" />'. PHP_EOL .

          '    <!--[if IE]>'. PHP_EOL .

          '      <link rel="stylesheet" type="text/css" media="screen" charset="utf-8" href="styles/ie.css" />'. PHP_EOL .

          '    <![endif]-->'. PHP_EOL .

          '    <link rel="shortcut icon" href="images/favicon.png" />'. PHP_EOL

      . '    <style type="text/css">' . PHP_EOL

      . $this->cdata_wrap(school_page_css($this->school))

      . '    </style>' . PHP_EOL;

    foreach ($this->meta as $key => $value)

      echo '    <meta name="' . htmlentities($key, ENT_QUOTES)

      . '" content="' . htmlentities($value, ENT_QUOTES)

      . '" ' . ($this->xhtml ? '/' : '') .  '>' . PHP_EOL;

    // Write out all passed scripts

    foreach ($this->scripts as $i)

      echo '    ' . $this->headCode["$i"] . "\n";

    /*

     * Perhaps we should have a separate array for javascript library

     * initialization snippets.

     */

    $javascript_init = '';

    if (in_array('jQuery.cuteTime', $this->scripts))

      $javascript_init .= 'jQuery.extend(jQuery.fn.cuteTime.settings, {refresh: 10000, use_html_attribute: false});' . PHP_EOL

	. 'jQuery.fn.cuteTime.settings.time_ranges[0].cuteness = \'in the future\';' . PHP_EOL;

    echo $this->script_wrap(''

			    . 'var slate_permutate_school = ' . json_encode($this->school['id']) . ';' . PHP_EOL

			    . 'var slate_permutate_semester = ' . json_encode($this->semester['id']) . ';' . PHP_EOL

			    . $javascript_init) . PHP_EOL;

    $selectschool_query = '&school=' . $this->school['id'];

    /* kludge */

    if (!empty($_REQUEST['s']))

      $selectschool_query .= '&s=' . (int)$_REQUEST['s'];

    echo '  </head>' . PHP_EOL .

	 '  <body>'. PHP_EOL .

         '    <div id="page">'. PHP_EOL .

         '      <div id="header">'. PHP_EOL .

	 '        <div id="title">'. PHP_EOL .

         '          <h1><a href="index.php"><img src="images/slatepermutate-alpha.png" alt="SlatePermutate" class="noborder" /></a><br /></h1>'. PHP_EOL .

         '          <p>'. PHP_EOL .

         '            <span id="subtitle">'.$this->pagetitle.'</span>'. PHP_EOL .

  	 '            <span id="menu">' . PHP_EOL

      . '              Profile: <em>' . $this->school['name'] . '</em>' . ($this->school_semester_constant ? '' : ' <a href="input.php?selectschool=1' . $selectschool_query . '">(change)</a>') . PHP_EOL;

      }

    else

      $parent_schedule_id = NULL;

    /*

     * Code outside of this block should _not_ assume $school and/or

     * $semester are defined. But it'd be more expensive to unset()

     * them here than to just overwrite them later...

     */

  }

elseif (!empty($_REQUEST['e']))

  {

    /*

     * Read an errorful schedule out of $_POST, this $_POST is created

     * by process.php when the originally sinful user produces bad

     * data.

     */

    $errors_fix = TRUE;

    if (!empty($_POST['postData']))

      $postData = $_POST['postData'];

    if (!empty($postData['parent_schedule_id']))

      $parent_schedule_id = (int)$postData['parent_schedule_id'];

    if (!empty($postData['school']))

      {

	$school = school_load($postData['school']);

	if (!empty($school))

	  $inputPage_options['school'] = $school;

      }

    if (!empty($school) && !empty($postData['semester']))

      {

	$semesters = school_semesters($school);

	if (!empty($semesters[$postData['semester']]))

	  $inputPage_options['semester'] = $semester;

      }

    $creating_new_schedule = FALSE;

  }

/*

 * We cannot initialize the page object nor guess the school before

 * figuring loading a saved schedule because we'll default to that

 * saved_schedule's school/semester.

 */

$scripts = array('jQuery', 'jQueryUI', 'qTip2', 'schedInput');

$school = $inputPage->get_school();

$semester = $inputPage->semester_get();

$my_hc = 'var slate_permutate_example_course_id = ' . json_encode(school_example_course_id($school)) . ';

jQuery(document).ready(

  function()

  {

    var class_last = 0;

';

if ($sch)

{

  foreach ($sch->courses_get() as $course)

    {

      $my_hc .= input_course_js($course, '    ');

    }

}

elseif ($errors_fix)

  {

    foreach ($_POST['postData'] as $course)

      if (is_array($course))

	{

	  $title = '';

	  if (!empty($course['title']))

	    $title = $course['title'];

	  if (empty($course['name']))

	    $my_hc .= '    class_last = add_class();' . PHP_EOL;

	  else

	    $my_hc .= '    class_last = add_class_n(' . json_encode($course['name']) . ', ' . json_encode($title) . ');' . PHP_EOL;

	  foreach ($course as $section)

	    if (is_array($section))

	      $my_hc .= '    add_section_n(class_last, ' . json_encode($section['letter']) . ', '

		. json_encode($section['synonym']) . ', ' . json_encode($section['start']) . ', '

		. json_encode($section['end']) . ', '

		. json_encode(array('m' => !empty($section['days'][0]), 't' => !empty($section['days'][1]), 'w' => !empty($section['days'][2]),

				    'h' => !empty($section['days'][3]), 'f' => !empty($section['days'][4]),

				    's' => !empty($section['days'][5])))

		. ', ' . json_encode($section['professor']) . ', '

		. json_encode($section['location']) . ', '

		. json_encode($section['type']) . ', '

		. json_encode($section['slot']) . ', '

		. json_encode(isset($section['credit_hours']) ? $section['credit_hours'] : -1) . ');' . PHP_EOL;

	  $my_hc .= PHP_EOL;

	}

  }

else

  {

    $default_courses = school_default_courses($school);

    foreach ($default_courses as $default_class)

      $my_hc .= input_course_js($default_class, '    ');

  }

$my_hc .= '    class_last = add_class();' . PHP_EOL;

if ($qtips_always || !isset($_SESSION['saw_qtips']))

  {

    $my_hc .= '    addTips();' . PHP_EOL;

    $_SESSION['saw_qtips'] = TRUE;

  }

$my_hc .= '  });

';

$inputPage->headcode_add('scheduleInput', $inputPage->script_wrap($my_hc), TRUE);

if ($school['id'] != 'default'

    && empty($_REQUEST['selectschool'])

    && empty($_REQUEST['selectsemester']))

  {

    /*

     * If we have chosen a school, set the canonical URL so that it

     */

    $query = array('school' => $school['id']);

    if ($sch)

      $query['s'] = $sch->id_get();

    $inputPage->canonize('input.php', $query);

  }

$inputPage->head();

/*

 * Force a student to choose a school or declare he's a generic

 * student before displaying the input form. To do this, we need

 * another variable in $_SESSION: $_SESSION['school_chosen'].

 */

if (!empty($_REQUEST['school']) && !empty($_SESSION['school']) && !strcmp($_REQUEST['school'], $_SESSION['school']))

  $_SESSION['school_chosen'] = TRUE;

if (!empty($_REQUEST['selectschool'])

    || empty($school) || $school['id'] == 'default' && empty($_SESSION['school_chosen']))

  {

    $next_page = 'input.php?';

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

      $next_page .= 's=' . (int)$_GET['s'] . '&';

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

      $next_page .= 'semester=' . htmlentities($$_GET['semester']) . '&';

?>

<h2>School Selection</h2>

<p>

  Choose the school you attend from the list below. <strong>If you cannot

  find your school</strong>, you may proceed using

  the <a href="<?php echo htmlentities($next_page); ?>school=default">generic

  settings</a>.

</p>

<?php

    $inputPage->showSchools($next_page);

    $inputPage->foot();

    exit;

  }

if (!empty($_REQUEST['selectsemester']))

  {

?>

<h2>Semester Selection</h2>

<p>

  Choose the semester for which you wish you make a schedule from the

  list below. If any semester is missing, please <a

  href="feedback.php?feedback=My+school+is+missing+the+&lt;semester+name&gt;+semester.">let us know</a>.

</p>

<?php

  $next_page = 'input.php?';

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

    $next_page .= 's=' . (int)$_GET['s'] . '&';

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