<?php

	/* Please see QuickCalendarREADME.txt for instructions */

	function getDayNumInWeek($dayName) { 
		$days = array(	"Sunday" => 1,
						"Monday" => 2,
						"Tuesday" => 3,
						"Wednesday" => 4,
						"Thursday" => 5,
						"Friday" => 6,
						"Saturday" => 7
						);
		return $days[$dayName];
	}
	
	
	abstract class QuickCalendar {
		protected $monthObj;
		private $monthNum;
		private $monthName;
		private $year;
		protected $allDays = array();
		private $FIRST_YEAR = 2007;
		
		public function __construct($monthNum = 0, $year = 0) {
			//validate, assign month number (1-12)
			if ($monthNum > 0 && $monthNum < 13) { $this->monthNum = $monthNum; }
			else { $this->monthNum = date('n');}
			
			//validate, assign year 
			if ($year >= $this->FIRST_YEAR) { $this->year = $year; }
			else { $this->year = date('Y'); }
			
			//create month, which creates days
			$this->monthObj = new Month($this, $this->monthNum, $this->year);
			
			//retrieve some information for public
			$this->allDays = $this->monthObj->getDays();
			$this->monthName = $this->monthObj->getName();
		}
			
		public function fillData($dataArray) { // array of array of data (ie links for each day)
			foreach ($dataArray as $date => $data) {
				$this->allDays[$date]->data = $data;
			}
		}
		
		public function printCalendar() {
			$this->weekBeginTemplate();
			$this->printDaysBefore();
			
			for ($i = 1; $i <= $this->getDaysInMonth(); $i++) {
				if ($this->allDays[$i]->getName() == "Sunday") { 
					$this->weekEndTemplate();
					$this->weekBeginTemplate();
				}
				$this->dayTemplate($i, $this->allDays[$i]);
			}
			
			$this->printDaysAfter();
			$this->weekEndTemplate();
		}
		
		public function getMonthNum() { return $this->monthNum; }
		public function getMonthName() { return $this->monthName; }
		public function getYear() { return $this->monthObj->getYear(); }
		public function getDaysInMonth() { return $this->monthObj->getDaysInMonth(); }
		public function getPreviousMonthNum() { return $this->monthObj->getPreviousMonthObj()->getMonthNum(); }
		public function getPreviousMonthName() { return $this->monthObj->getPreviousMonthObj()->getName(); }
		public function getPreviousMonthYear() { return $this->monthObj->getPreviousMonthObj()->getYear(); }
		public function getNextMonthNum() { return $this->monthObj->getNextMonthObj()->getMonthNum(); }
		public function getNextMonthName() { return $this->monthObj->getNextMonthObj()->getName(); }
		public function getNextMonthYear() { return $this->monthObj->getNextMonthObj()->getYear(); }
		public function printDaysBefore() { $this->monthObj->printDaysBefore(); }
		public function printDaysAfter() { $this->monthObj->printDaysAfter(); }
		
		public abstract function gatherData();
	}
	
	
	class PartialMonth {
		protected $year;
		protected $monthNum;
		protected $name;
		protected $daysInMonth;
		protected $todaysDate;
		protected $firstDayOfMonth;
		protected $lastDayOfMonth;
		
		public function __construct(QuickCalendar $calObj, $monthNum, $year) {
			$this->year = (int) $year;
			$this->monthNum = (int) $monthNum;
			$this->name = date('F', mktime(0, 0, 0, $this->monthNum, 1, $this->year));
			
			$this->daysInMonth = date('t', mktime(0, 0, 0, $this->monthNum, 1, $this->year));
			$this->setTodaysDate();
			
			$this->firstDayOfMonth = new Day(1, $this, $this->todaysDate);
			$this->lastDayOfMonth = new Day($this->daysInMonth, $this, $this->todaysDate);
		}
		
		public function getYear() { return $this->year; }
		public function getMonthNum() { return $this->monthNum; }
		public function getName() { return $this->name; }
		public function getDaysInMonth() { return $this->daysInMonth; }
		private function setTodaysDate($date = null) {
			$d = -1;
			if ($this->monthNum != ((int) date('n'))) {  }
			else if (isset($date)) { $d = (int) $date;  } 
			else { $d = (int) date('j'); }
			$this->todaysDate = $d;
		}
	}
	
	class Month extends PartialMonth {
		private $days = array(); //28-31
		private $previousMonth;
		private $nextMonth;
		private $calObj;
		
		public function __construct(QuickCalendar $calObj, $monthNum, $year){
			parent::__construct($calObj, $monthNum, $year);
			
			$this->calObj = $calObj;
			
			if ($this->monthNum == 1) { $pMonth = 12; $pYear = $this->year - 1; }
			else { $pMonth = $this->monthNum - 1; $pYear = $this->year; }
			$this->previousMonth = new PartialMonth($this->calObj, $pMonth, $pYear);
			
			if ($this->monthNum == 12) { $nMonth = 1; $nYear = $this->year + 1; }
			else { $nMonth = $this->monthNum + 1; $nYear = $this->year; }
			$this->nextMonth = new PartialMonth($this->calObj, $nMonth, $nYear);
			
			$this->makeDays();
		}
		
		private function makeDays() {
			$this->days[1] = $this->firstDayOfMonth;
			$this->days[$this->daysInMonth] = $this->lastDayOfMonth;
			//get days except first and last
			for ($i = 2; $i < $this->daysInMonth; $i++) {
				$this->days[$i] = new Day($i, $this, $this->todaysDate);
			}
		}
		
		public function getDays() { return $this->days; }
		public function getPreviousMonthObj() { return $this->previousMonth; }
		public function getNextMonthObj() { return $this->nextMonth; }
		
		public function printDaysBefore() {
			$firstDayNum = getDayNumInWeek($this->firstDayOfMonth->getName());
			$daysInPMonth = $this->previousMonth->getDaysInMonth();
			$pMonthStartDate = ($daysInPMonth - $firstDayNum) + 2;
			$numDays = ($daysInPMonth - $pMonthStartDate) + 1;
			
			for ($i = $pMonthStartDate; $i <= $daysInPMonth; $i++) {
				$this->calObj->offDayTemplate($i);
			}
		}
		
		public function printDaysAfter() {
			$lastDayNum = getDayNumInWeek($this->lastDayOfMonth->getName());
			$numDays = 7 - $lastDayNum;
			
			for ($i = 1; $i <= $numDays; $i++) {
				$this->calObj->offDayTemplate($i);
			}
		}
	}
	
	
	
		
	class Day {
		//check the privacy of these vars
		public $data = array(); //to be filled by QuickCalendar::fillData()
		private $date;
		private $name;
		private $monthObj;
		private $weekend = '';
		private $today = '';
		
		public function __construct($date, PartialMonth $monthObj, $realDate) {
			$date = (int) $date;
			if ($date > 0 && $date < 32) { $this->date = $date; }
			else { echo "Error: date provided for new Day was incorrect. Failed.<br />"; return false; }
			
			$this->monthObj = $monthObj;
			$this->name = date('l', mktime(0, 0, 0, $this->monthObj->getMonthNum(), $this->date, $this->monthObj->getYear()));
			
			if ($this->name == 'Saturday' || $this->name == 'Sunday') {
				$this->weekend = ' weekend';
			}
			
			//dont assign 'today' for PartialMonth class
			if (get_class($this->monthObj) != "Month") { $realDate = -1; }
			if ($realDate == $this->date) { $this->today = ' today'; }
		}
		
		public function getName() { return $this->name; }
		public function getDate() { return $this->date; }
		//public function getMonthObj() { return $this->monthObj; }
		public function getIsWeekendString() { return $this->weekend; }
		public function getIsTodayString() { return $this->today; }
	}

?>