<?php

class ScheduleController extends WTPageController 
{		
	function getRoutes() {
		return array();
	}
	
	private function commonCheck(&$registry, &$request, &$response)
	{
		$user = &$registry->get('user');

		if(!$user->isRegistered()) {
			$this->redirect('/login/');
			return FALSE;
		}
		
		return TRUE;
	}
	
	function formatDay($day)
	{
		return $day > 6 ? abs(6 - $day + 1) : $day;
	}
	
	function parseEvents(&$todays_events, &$events, &$num_cols, $today, $is_tutor)
	{
		while($events->next())
		{
			$event = &$events->current();
						
			// figure out the number of days this event spans over.. this
			// should only be a max of 2, but whatever.
			$num_days = 1;
			if($event->get('start_day_of_week') != $event->get('end_day_of_week'))
			{				
				// not best solution
				if($event->get('end_day_of_week') < $event->get('start_day_of_week'))
				{
					$num_days = (6 - $event->get('start_day_of_week') + 1) + (6 - (6 - ($event->get('end_day_of_week') + 1)));
				}
				else
				{
					$num_days = $event->get('end_day_of_week') - $event->get('start_day_of_week');
				}
			}

			// loop over the days and only deal with today
			for($d = $event->get('start_day_of_week'); $d < $event->get('start_day_of_week') + $num_days; $d++)
			{
				$day = $this->formatDay($d);
				
				if($day == $today)
				{
					$start_hour = ($event->get('start_day_of_week') == $today) ? $event->get('start_hour_of_day') : 0;
					$end_hour = ($event->get('end_day_of_week') == $today) ? $event->get('end_hour_of_day') : 23;
					
					$start_mins = ($event->get('start_day_of_week') == $today) ? $event->get('start_mins_of_hour') : 0;
					$end_mins = ($event->get('end_day_of_week') == $today) ? $event->get('end_mins_of_hour') : 0;
					
					$event_info = array(
									'event_id' => $event->getId(),
									'subject_name' => $event->get('subject_name'),
									'description' => $event->get('description'),
									'num_rows' => 1,
									'display' => 1,
									'row_class' => ($is_tutor ? 'schedule_tutoring' : 'schedule_tutored')
									);
					$null_event = array(
									'event_id' => $event->getId(),
									'display' => 0,
									);
					
					$row = '';
					$start_row = '';
					$column = 0;
					$num_rows = 0;
					
					for($h = $start_hour; $h <= $end_hour; $h++)
					{
						if($h == $start_hour)
						{
							if($start_mins < 30)
							{
								$row = $h.'00';
								$column = isset($todays_events[$row]) ? count($todays_events[$row]) : 0;
								
								if(isset($todays_events[$h.'30'][$column]))
								{
									$h = $start_hour; // set the loop to restart
									$column++;
								}
							}
							else
							{
								$row = $h.'30';
								$column = isset($todays_events[$row]) ? count($todays_events[$row]) : 0;
							}
						}
						else if($h == $end_hour)
						{							
							if($end_mins != 0)
							{
								if(isset($todays_events[$h.'00'][$column]) || ($end_mins > 30 && isset($todays_events[$h.'30'][$column])))
								{
									$h = $start_hour; // set the loop to restart
									$column++;
								}
							}
						}
						else
						{
							if(isset($todays_events[$h.'00'][$column]) || isset($todays_events[$h.'30'][$column]))
							{
								$h = $start_hour; // set the loop to restart
								$column++;
							}
						}
					}
					
					for($h = $start_hour; $h <= $end_hour; $h++)
					{
						if($h == $start_hour)
						{
							if($start_mins < 30)
							{
								$row = $h.'00';
								$start_row = $row;

								$todays_events[$row][$column] = $event_info;
								
								$row = $h.'30';
								
								
								$todays_events[$row][$column] = $null_event;
								
								$num_rows += 2;
							}
							else
							{
								$row = $h.'30';
								$start_row = $row;
																
								$todays_events[$row][$column] = $event_info;
								
								$num_rows++;
							}
							
						}
						else if($h == $end_hour)
						{							
							if($end_mins != 0)
							{
								$todays_events[$h.'00'][$column] = $null_event;
								$num_rows++;
								
								if($end_mins > 30)
								{
									$todays_events[$h.'30'][$column] = $null_event;
									$num_rows++;
								}
							}
						}
						else
						{
							$todays_events[$h.'00'][$column] = $null_event;
							$todays_events[$h.'30'][$column] = $null_event;
							
							$num_rows += 2;
						}
						
						// make sure we know how many concurrent cols (events)
						// we need to prepare for
						if(isset($todays_events[$h.'00']) && count($todays_events[$h.'00']) > $num_cols)
						{
							$num_cols++;
						}
					}
					
					$todays_events[$start_row][$column]['num_rows'] = $num_rows;
					$todays_events[$start_row][$column]['height'] = $num_rows * 20 - 6 - 6 - 1; // 6 for margin, 6 for padding, 1 for border
				}
				else
				{
					continue;
				}
			}
		}
	}
	
	function index(&$registry, &$request, &$response) 
	{		
		if(!$this->commonCheck($registry, $request, $response))
		{
			return;
		}
		
		$user = &$registry->get('user');
		
		$todays_events = array();
				
		$finder = &$this->getFinder('scheduled_events');
		
		$today = date("w");
		$num_cols = 1;
		
		// get events where we're tutoring
		//  AND wt_event_info.next_occur > ? AND wt_event_info.next_occur < ? 
		// time()-86400, time()+86400, 
		$sql = 'wt_scheduled_events.tutor_id=? ';
		$sql .= 'AND ((wt_scheduled_events.start_day_of_week>=? AND wt_scheduled_events.end_day_of_week<=6) ';
		$sql .= 'OR (wt_scheduled_events.end_day_of_week<=? AND wt_scheduled_events.end_day_of_week>=0))';
		$events = &$finder->findAllWhere($sql, array($user->getId(), $today, $today));
		
		$this->parseEvents($todays_events, $events, $num_cols, $today, $is_tutor = TRUE);
		
		// get events where we're being tutored
		$sql = 'wt_scheduled_events.user_id=? ';
		$sql .= 'AND ((wt_scheduled_events.start_day_of_week>=? AND wt_scheduled_events.end_day_of_week<=6) ';
		$sql .= 'OR (wt_scheduled_events.end_day_of_week<=? AND wt_scheduled_events.end_day_of_week>=0))';
		$events = &$finder->findAllWhere($sql, array($user->getId(), $today, $today));
		
		$this->parseEvents($todays_events, $events, $num_cols, $today, $is_tutor = FALSE);
		
		//print_r($todays_events);// exit;
		
		$hours = array_pad(array(), 48, array('hour'=>0,'day'=>0,));
		$hours = &new FAArrayIterator($hours);
				
		$i = 0;
		$h = 0; // hours 0-23
		$curr_hour = 1;
		$am_or_pm = 'am';
		
		// go over the 24 hour period, separated into 48 30 min sections
		while($hours->next())
		{
			$hour = &$hours->current();
			$mins = ($i++ % 2 == 0 ? '00' : '30');
			
			$cols = array();
			if(isset($todays_events[$h.$mins]))
			{
				$cols = $todays_events[$h.$mins];
			}
			
			// pad the array
			$cols = array_pad($cols, $num_cols, array('event_id' => 0, 'display' => 1));
			
			// just a nice display for the time of the current row
			$hour['time'] = $curr_hour .':'. $mins . $am_or_pm;
			
			// deal with the change from AM to PM
			if($curr_hour % 12 == 0 && $i % 2 == 0)
			{
				$curr_hour = 0;
				$am_or_PM = 'pm';
			}
			
			// increment the current hour only if we
			// have gone past the half hour point
			if($i % 2 == 0)
			{
				$h++;
				$curr_hour++;
			}
			
			// add concurrent scheduled tutoring sessions
			// as columns
			$hour['cols'] = &new FAArrayIterator($cols);
		}
		
		$table_width = ++$num_cols * 150 + 10;
		$table_width = $table_width < 300 ? '450' : $table_width;
		
		$response->assignRef('hours', $hours);
		$response->assign('table_width', $table_width);

		$response->assignRef('wtuser', $user);
		$response->assign('page_title', 'Schedule');
		$response->assign('content', '/schedule/layout_default.html');
        $this->setLayout('layout_default.html');
    }
}

?>