/**

 * \file

 *    This file represents a course (formerly class). It stores

 *    the section associated with the course.

 */

include_once 'class.section.php';

class Course implements IteratorAggregate

{

  private $name;	// String

  private $sections;	// Array of sections

  private $nsections;	// int

  /**

   * \brief

   *   Other courses that this course depends on.

   *

   * Example: Many calvin courses depend on lab courses.

   */

  private $dependencies;

  /**

   * \brief

   *    Creates a class with the given name.

   */

  {

    $this->sections = array();

    $this->nsections = 0;

    $this->dependencies = array();

  }

  /**

   * \brief

   *   Adds an already-instantiated section to this class.

   */

  public function section_add(Section $section)

  {

    $this->sections[$this->nsections] = $section;

    $this->nsections++;

   * \brief

   *    Returns the name of the class.

   * \return

   *    The name of the class.

   */

  public function getName()

  {

    return $this->name;

  }

  /**

   * \brief

   *   Add a dependency on another course.

   *

   * \param $course

   *   The other course to depend on.

   */

  public function dependency_add(Course $course)

  {

    $this->dependencies[] = $course;

  }

  /**

   * \brief

   *

   * \param $recursion_trace

   *   Only for internal use. Used to prevent infinite recursion.

   */

  public function to_json_array(array $recursion_trace = array())

  {

    if (!empty($recursion_trace[$this->getName()]))

      return NULL;

    $recursion_trace[$this->getName()] = TRUE;

    $json_array = array(

			'class' => $this->getName(),

			'sections' => array(),

			'dependencies' => array(),

			);

    foreach ($this->sections as $section)

      {

	$section_json_arrays = $section->to_json_arrays();

	foreach ($section_json_arrays as $section_json_array)

	  $json_array['sections'][] = $section_json_array;

      }

    foreach ($this->dependencies as $dependency)

      {

  /**

   * \brief

   *   Produce a Course object based on a JSON array compatible with

   *   the output of Course::to_json_array().

   *

   * \param $json

   *   The JSON array to parse.

   * \return

   *   A Course.

   */

  public static function from_json_array($json)

  {

    if (!empty($json['sections']))

      $course->section_add(Section::from_json_arrays($json['sections']));

    if (!empty($json['dependencies']))

      foreach ($json['dependencies'] as $dependency)

	$course->dependency_add(Course::from_json_array($dependency));

    return $course;

  }

  /**

   * \brief

   *   Upgrade a course class to a newer version of that class.

   */

  public function __wakeup()

  {

    if (!isset($this->dependencies))

      $this->dependencies = array();

  }

}

    /* mark this as an upgraded Schedule class. See __wakeup() */

    $this->nclasses = -1;

  }

  //--------------------------------------------------

  // Mutators and Accessors

  //--------------------------------------------------

  public function getName()

  {

    return $this->scheduleName;

  }    

  {

  }

  /**

   * \brief

   *   Adds a section to this semester after finding the class.

   *

   * \return

   *   NULL on success, a string on error which is a message for the

   *   user and a valid XHTML fragment.

   */

  function addSection($course_name, $letter, $time_start, $time_end, $days, $synonym = NULL, $faculty = NULL, $location = NULL, $type = 'lecture')

  {

	/* ensure that early times are actually first ;-) */

	if ($sort_time)

	  sort($time);

        echo '    <div id="regDialog" title="Registration Codes">' . PHP_EOL

	  . '      <div id="regDialog-content"></div>' . PHP_EOL

	  . '      <p id="regDialog-disclaimer" class="graytext"><em>Note: The registration information above corresponds to the sections displayed on the currently selected tab.</em></p>'

	  . '    </div>';

	echo '<div id="tabs">' . "\n" .

               '<div id="show-box" class="show-buttons">

                  <form action="#"><p class="nospace">

                    <label><strong>Display:</strong></label>

                    <input id="show-prof" name="show-prof" type="checkbox" checked="checked" /><label for="show-prof">Professor</label>

                    <input id="show-location" name="show-location" type="checkbox" /><label for="show-location">Room</label>

                    <input id="show-synonym" name="show-synonym" type="checkbox" /><label for="show-synonym">Synonym</label>

                    <span id="regCodes"><label><a href="#"><strong>Register for Classes</strong></a></label></span></p>

                  </form>';

          echo '</div> <!-- id="show-box" -->'

	     . '<div id="the-tabs"><ul>' . "\n";

	for($nn = $first_permutation + 1; $nn <= $last_permutation; $nn++)

	  {

	    echo  "<li><a href=\"#tabs-" . $nn . "\">&nbsp;" . $nn . "&nbsp;</a></li>\n";

		echo "          <tr>\n"

		  . "            <td class=\"time\">" . $this->prettyTime($time[$r]) . "</td>\n";

		/* currently, 0-5 = monday-saturday */

		for($dayLoop = 0; $dayLoop < $max_day_plusone; $dayLoop++)

		{

		  /* Makes sure there is not a class already in progress */

		  if($rowspan[$dayLoop] <= 0)

		    {

		      for($j = 0; $j < count($this->courses); $j++)

			{

			  $section_index = $this->storage[$i][$j];

				  /* iterate through all of a class's meeting times */

				  $meetings = $section->getMeetings();

				  /* find any meeting which are going on at this time */

				  $current_meeting = NULL;

				  foreach ($meetings as $meeting)

				    {

				      if ($meeting->getDay($dayLoop)

					  && $meeting->getStartTime() >= $time[$r]

					  && $meeting->getStartTime() < $time[$r+1])

					{

					  $current_meeting = $meeting;

				    {

				      /* calculate how many rows this section should span */

				      for ($my_r = $r;

					   $my_r < (count($time)-1) && $current_meeting->getEndTime() > $time[$my_r];

					   $my_r ++)

					;

				      $rowspan[$dayLoop] = $my_r - $r;

				      $single_multi = 'single';

				      if ($rowspan[$dayLoop] > 1)

					$single_multi = 'multi';

				      echo '            <td rowspan="' . $rowspan[$dayLoop]

					. '" class="' . $single_multi . ' class' . $j

					. ', room: ' . htmlentities($current_meeting->getLocation(), ENT_QUOTES)

					. ', type: ' . htmlentities($current_meeting->type_get(), ENT_QUOTES) . '">'

					. htmlentities($section->getLetter(), ENT_QUOTES) . "\n"

					. '<span class="prof block">' . htmlentities($section->getProf(), ENT_QUOTES) . "</span>\n"

					. '<span class="location block">' . htmlentities($current_meeting->getLocation(), ENT_QUOTES) . "</span>\n"

					. '<span class="synonym block">' . htmlentities($section->getSynonym(), ENT_QUOTES) . "</span>\n"

					. "</td>\n";

				      /* for the ``Registration Codes'' dialogue: */

				      if (empty($permutations_courses[$j]))

					{

					  $singleton_course->section_add($section);

					  $permutation_courses[$j] = $singleton_course->to_json_array();

					}

				      $filled = TRUE;

				    }

			}

		    }

		  if ($rowspan[$dayLoop] > 0)

		    {

		      $filled = TRUE;

		  /* If the cell was not filled, fill it with an empty cell. */

			if(!$filled)

			{

				echo "            <td class=\"none\">&nbsp;</td>\n";

			}

			$filled = FALSE;

		}

		// End of row

		echo "          </tr>\n";

	      }

	    // End of table

	    echo "        </table>\n"

              . '         <span class="course-data">'.  htmlentities(json_encode($permutation_courses)) . "</span>\n"

	      . '      </div> <!-- id="section' . ($i + 1) . "\" -->\n";

	  }

          echo "    </div> <!-- class=\"scontent\" -->\n"

	     . "  </div> <!-- class=\"scroller\" -->\n"

	     . "</div> <!-- id=\"my-glider\" -->\n"

	     . $footcloser; // Closes off the content div

      } else {

      echo '<html><body><p>There are no possible schedules. Please <a href="input.php?s='.$this->id.'">try again</a>.</p></body></html>';

{

  $nclasses = $sch->nclasses_get();

  for ($class_key = 0; $class_key < $nclasses; $class_key ++)

    {

      $my_hc .= input_class_js($sch->class_get($class_key), '    ');

    }

}

elseif ($errors_fix)

  {

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

      if (is_array($course))

	{

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

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

	  else

	  foreach ($course as $section)

	    if (is_array($section))

	      $my_hc .= '    add_section_n(class_last, \'' . htmlentities($section['letter'], ENT_QUOTES) . '\', \''

		. htmlentities($section['synonym'], ENT_QUOTES) . '\', \'' . htmlentities($section['start'], ENT_QUOTES) . '\', \''

		. htmlentities($section['end'], ENT_QUOTES) . '\', '

		. 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])))

		. ', \'' . htmlentities($section['professor'], ENT_QUOTES) . '\', \''

		. htmlentities($section['location'], ENT_QUOTES) . '\', \''

		. htmlentities($section['type'], ENT_QUOTES) . '\');' . PHP_EOL;

	  $my_hc .= PHP_EOL;

</form>

<?php 

/* Show/hide Advanced Options: <p><span id="showadvanced" style="margin-left: 1em;"><a href="#">Advanced</a></span></p> */ 

?>

<div id="showInstructions" style="width: 100%; text-align: center;"><a href="#">Detailed Instructions...</a></div>

<?php

$inputPage->showSchoolInstructions();

$inputPage->foot();

{

  for ($section_key = $nsections - 1; $section_key >= 0; $section_key --)

    {

      $meetings = $section->getMeetings();

      foreach ($meetings as $meeting)

	{

	  $js .= $whitespace . 'add_section_n(class_last, \'' . htmlentities($section->getLetter(), ENT_QUOTES) . '\', \''

	    . htmlentities($section->getSynonym(), ENT_QUOTES) . '\', \''

	    . $meeting->getStartTime() . '\', \''

	    . $meeting->getEndTime() . '\', '

	    . json_encode(array('m' => $meeting->getDay(0), 't' => $meeting->getDay(1), 'w' => $meeting->getDay(2), 'h' => $meeting->getDay(3), 'f' => $meeting->getDay(4),

				's' => $meeting->getDay(5))) . ', \''

	    . htmlentities($section->getProf(), ENT_QUOTES) . '\', \''

	    . htmlentities($meeting->getLocation(), ENT_QUOTES) . '\',\''

	    . htmlentities($meeting->type_get(), ENT_QUOTES) . "');\n";

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

	  {

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

	    $parent_schedule = schedule_store_retrieve($schedule_store, $parent_schedule_id);

	    /* Detect bad parent_schedule reference. */

	    if (empty($parent_schedule))

	      $parent_schedule_id = NULL;

	  }

	$allClasses = new Schedule($name, $parent_schedule_id);

	$errors = array();

				  /* Skip the section name, which isn't a section */

					if(is_array($section))

					  {

					    if ($error_string !== NULL)

					      $errors[] = $error_string;

					  }

			}

		}

		/*

		 * Tell the user that his input is erroneous and

		 * require him to fix it.

		 */

		if (count($errors))

		  {

 *

 * 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/>.

 */

/** Filter out whitepace items */

}

/** Parse html at URL into array, first row is row headers */

  $arr = array();

  $dom = new DOMDocument;

  $html = file_get_contents($url);

  if(!$html){

    return 1;

  }

  $dom->loadHTML($html);

  $dom->preserveWhiteSpace = false;

  $tables = $dom->getElementsByTagName('table');

  $rows = $tables->item(3)->getElementsByTagName('tr'); // Get first table on page 

  foreach ($rows as $rownum => $row) {

    if($rownum > 5) {

  $arr = array_values($arr); // Reindex array

  // Strip navigation and trailing garbage

  $arr[count($arr)-3] = NULL;

  $arr[count($arr)-2] = NULL;

  $arr[count($arr)-1] = NULL;

  $arr = array_filter($arr);

  return $arr;

}

{

  $year = substr($semester->year_get(), 2);

  $season = strtolower(substr($semester->season_get(), 0, 1));

  /* Current academic departments. Update as needed. */

  $departments = array('AAPTIS','ACABS','AERO','AEROSP','AMCULT','ANTHRARC','ANTHRBIO','ANTHRCUL','AOSS','APPPHYS','ARCH','ARMENIAN','ARTDES','ASIAN','ASIANLAN','ASTRO','AUTO','BCS','BIOINF','BIOLCHEM','BIOLOGY','BIOMEDE','BIOPHYS','CAAS','CEE','CHE','CHEM','CIC','CICS','CJS','CLARCH','CLCIV','CMPLXSYS','COMM','COMP','COMPLIT','CSP','CZECH','DANCE','DUTCH','ECON','EDCURINS','EDUC','EEB','EECS','ELI','ENGLISH','ENGR','ENSCEN','ENVIRON','ESENG','FRENCH','GEOG','GEOSCI','GERMAN','GREEK','GTBOOKS','HBEHED','HISTART','HISTORY','HJCS','HMP','HONORS','INTMED','IOE','ITALIAN','JAZZ','JUDAIC','KINESLGY','LACS','LATIN','LHC','LHSP','LING','MACROMOL','MATH','MATSCIE','MCDB','MECHENG','MEDADM','MEDCHEM','MEMS','MENAS','MFG','MICROBIOL','MILSCI','MKT','MODGREEK','MOVESCI','MUSEUMS','MUSICOL','MUSMETH','MUSTHTRE','NAVARCH','NAVSCI','NERS','NEUROSCI','NRE','NURS','OMS','ORGSTUDY','PAT','PATH','PHARMACY','PHIL','PHRMACOL','PHYSICS','PHYSIOL','POLISH','POLSCI','PORTUG','PSYCH','PUBHLTH','PUBPOL','RCARTS','RCCORE','RCHUMS','RCIDIV','RCLANG','RCNSCI','RCSSCI','REEES','RELIGION','ROMLANG','ROMLING','RUSSIAN','SAC','SAS','SCAND','SEAS','SI','SLAVIC','SOC','SPANISH','STATS','STDABRD','SWC','TCHNCLCM','THEORY','THTREMUS','UC','UKRAINE','UP','WOMENSTD','YIDDISH');

  $basepath = "http://www.lsa.umich.edu/cg/cg_results.aspx";

  $yearsyn = 1800 + $year; // Weird year synonym name where 2000 == 1800

  $basepath .= "?termArray={$season}_{$year}_${yearsyn}&cgtype=ug";

  $season = strtolower($season);

  $tables = array();

  foreach($departments as $department) {

    var section_i = add_section_n(cnum, '', '', '', '', {m: false, t: false, w: false, h: false, f: false, s: false}, '', '', '');

    if (cnum == slate_permutate_course_free)

	course_free_check(cnum);

    return section_i;

}

/**

 * Add a list of sections gotten via an AJAX call.

 */

function add_sections(cnum, data)

{

    var i;

    if (!data.sections)

	return;

    /*

     * we get the sections in the correct order. For the user to see

     * them in the correct order, we must reverse the add_setion_n()

     * calls.

     */

    for (i = data.sections.length - 1; i >= 0; i --)

	{

	    section = data.sections[i];

	    add_section_n(cnum, section.section, section.synonym, section.time_start, section.time_end, section.days, section.prof, section.location, section.type);

	}

    /*

     * Handle course-level interdependencies.

     */

    if (data.dependencies)

	jQuery.each(data.dependencies, function(i, dep)

		    {

			add_sections(new_course_num, dep);

		    });

}

	{

	    /*

	     * If we're adding a course entry form with preadded

	     * content, first remove the empty course.

	     */

		course_remove(slate_permutate_course_free);

		sectionsOfClass[classNum] = 0; // Initialize at 0

		/* store classNum as course_i into the <tr />: */

		jQuery('#tr-course-' + classNum).data({course_i: classNum});

		var class_elem = jQuery('.className' + classNum);

		/*

		 * Don't let the user accidentally submit the form by

		 * pressing <ENTER>. Instead, select the first

		 * autocomplete result if possible.

		 */

/**

 * \brief

 *   Ensure that there is an empty course entry and return its

 *   identifier.

 */

function add_class()

{

    /*

     * Don't add an empty new course entry if there already is

     * one. Otherwise, set this new class to be the ``hot'' one.

     */

    if (slate_permutate_course_free == -1)

    return slate_permutate_course_free;

}

/**

 * \brief

 *   Remove a course entry.

 *

 * Ensures that slate_permutate_course_free is kept consistent.

 *

 * \param course_i

 *   The internal JS identifer for the course (not the course_id which

 *   the PHP cares about).