<?php
	/**************************************************************************\
	* eGroupWare API - Matrix View Generator                                   *
	* This file written by Marc Logemann <loge@phpgroupware.org>               *
	* class for creating matrix like timeframes for items                      *
	*                                                                          *
	* this matrix is having the days of actual month in the x-axis and the     *
	* items, which could be projects, in the y-axis.                           *
	* You will see a top-down view of all items and their associated           *
	* timeframes. You probably saw this in projectmanagement apps              *
	*                                                                          *
	* Copyright (C) 2000, 2001 Marc Logemann                                   *
	* -------------------------------------------------------------------------*
	* This library is part of the eGroupWare API                               *
	* http://www.egroupware.org/api                                            * 
	* ------------------------------------------------------------------------ *
	* This library is free software; you can redistribute it and/or modify it  *
	* under the terms of the GNU Lesser General Public License as published by *
	* the Free Software Foundation; either version 2.1 of the License,         *
	* or any later version.                                                    *
	* This library 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 Lesser General Public License for more details.              *
	* You should have received a copy of the GNU Lesser General Public License *
	* along with this library; if not, write to the Free Software Foundation,  *
	* Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA            *
	\**************************************************************************/

	class matrixview
	{
		var $sumdays = 0;
		var $month = 0;
		var $monthname = '';
		var $year = 0;
		var $day = 0;

		var $items_content = array();
		var $items_count = 0;
	
		var $arr_second_dim = 0;
		var $image1pix = 'images/pix.gif';
	
		var $color_headerfield = '#FFFF33';
		var $color_emptyfield = '#CCCCCC';

		var $selection = 1;

		/**
		*
		* construtor: graphview class
		*
		* constructor waits for the desired month in 
		* integer presentation and the desired year also
		* in integer presentation 4 digits (ex. 2001)
		*
		* @param 	int 	month (for example: 02)
		* @param  int 	year (for example: 2001)
		*
		*/
		function matrixview ($month_int = 0, $year_int = 0)
		{
			for($i;$i<32;$i++)
			{
				if(checkdate($month_int,$i,$year_int)) $days++;
			}

			$this->month = $month_int;
			$this->year = $year_int;
			$this->set1PixelGif($GLOBALS['phpgw']->common->get_image_path('todo').'/pix.gif');
		}

		/**
		*
		* set a Period for a specified item
		*
		* setting a period for an element means to define
		* a fromDate and and a toDate together with the
		* item itself. This will store a timeframe associated
		* with an item for later usage
		*
		* @param 	string 	item for the timeframe
		* @param  date 	fromdate in format yyyymmdd
		* @param  date		todate in format yyyymmdd
		*
		* @return boolean	false if item cannot be saved
		*				otherwise true
		*/
		function setPeriod ($item, $fromdate, $todate, $color='#990033')
		{
			$fyear = substr($fromdate,0,4);
			$fmonth = substr($fromdate,4,2);
			$fday = substr($fromdate,6,2);

			$tyear = substr($todate,0,4);
			$tmonth = substr($todate,4,2);
			$tday = substr($todate,6,2);

			if(mktime(0,0,0, $tmonth, $tday, $tyear) < mktime(0,0,0, $this->month+1,0,$this->year))
			{
				$this->day = $tday;
			}
			else 
			{
				$dinfo = getdate(mktime(0,0,0, $this->month+1,0,$this->year));
				$this->day = $dinfo[mday];
			}

			$go = 1;
			$i = 0;
			$z = 0;

			while($go == 1)
			{
				// calculates fromdate
				// echo date("d/m/Y", mktime(0,0,0, $fmonth, $fday+$i, $fyear)); echo "<br>";

				$datinfo = getdate(mktime(0,0,0, $fmonth, $fday+$i, $fyear));
			
				if($datinfo['mon'] == $this->month
					&& $datinfo['year'] == $this->year
					&& $datinfo['mday'] <= $this->day)
				{
					$t = $datinfo['mday'];
					$this->items_content[$this->items_count][$t] = 'x';
				}
				
				if (mktime(0,0,0, $fmonth, $fday+$i, $fyear) >= mktime(0,0,0, $this->month+1, 0, $this->year) ||
					mktime(0,0,0, $fmonth, $fday+$i, $fyear) >= mktime(0,0,0, $tmonth, $tday, $tyear))
				{
					$go = 0;
				}
				$i++;
			}
		
			$this->items_content[$this->items_count][0] = $item;
			$this->items_color[$this->items_count]      = $color;

			// increase number of items in two-dimensional array
			$this->items_count++;
		}

		/**
		*
		* sets the color for empty dayfields
		*
		* @param	string 	color in hexadecimal (ex. "#336699")
		*/
		function setEmptyFieldColor ($color)
		{
			$this->color_emptyfield=$color;
		}

		/**
		*
		* sets the color for calendar day fields
		*
		* @param	string 	color in hexadecimal (ex. "#336699")
		*/
		function setHeaderFieldColor ($color)
		{
			$this->color_headerfield=$color;
		}

		/**
		*
		* sets a new path for 1pixel (pix.gif) gif needed for the table
		* default is set actual script dir + /images
		*
		* @param	string 	path and name to 1pixel gif
		*/
		function set1PixelGif ($filepath)
		{
			$this->image1pix=$filepath;
		}

		/**
		*
		* disable selection of new timeframe
		*
		*/
		function disableSelection ()
		{
			$this->selection=0;
		}

		/**
		*
		* return the html code for the matrix
		*
		* will return the complete html code for the matrix.
		* In the calling program you can do some other
		* operations on it, because it wont be echoed directly
		*
		* @return string	html code for the matrix
		*/
		function out($form_link)
		{
			// get days of desired month (month submitted in constructor)

			$in = getdate(mktime(0,0,0, $this->month+1,0,$this->year));
			$this->sumdays = $in[mday];
			$this->monthname = $in[month];

			$this->out_monthyear($form_link);

			echo '<div align="center">' . "\n";
			echo '<table border="0">' . "\n";

			$this->out_header();

			// loop through number of items
			for($z=0;$z<$this->items_count;$z++)
			{
				// seperate color and name from first array element

				$itemname  = $this->items_content[$z][0];
				$itemcolor = $this->items_color[$z];

				echo '<tr>' . "\n";
				echo '<td>' . $itemname . '</td>' . "\n";

				// loop through days of desired month
				for($r=1;$r<$this->sumdays+1;$r++)
				{
					if($this->items_content[$z][$r] == 'x')
					{
						$color = $itemcolor;
					}
					else
					{
						$color = $this->color_emptyfield;
					}
					echo '<td bgcolor="' . $color . '">&nbsp;</td>' . "\n";
				}

				echo '</tr>' . "\n";
				$this->out_ruler();
			}

			echo '</table>';
			echo '</div>' . "\n";
		}

		/**
		*
		* private class for out method
		*
		* should not be used from external
		*
		*/
		function out_header ()
		{
			echo '<tr>' . "\n";
			echo '<td height="1" colspan="'; echo $this->sumdays+1; echo '" bgcolor="black"><img src="' . $this->image1pix . '"></td>' . "\n";
			echo '</tr>' . "\n";
			echo '<tr>' . "\n";
			echo '<td>' . lang('Title') . '</td>' . "\n";

			for($i=1;$i<$this->sumdays+1;$i++)
			{
				echo '<td bgcolor="'; echo $this->color_headerfield; echo '">' . sprintf("%02d",$i) . '</td>' . "\n";
			}

			echo '</tr>' . "\n";
			echo '<tr>' . "\n";
			echo '<td height="1" colspan="'; echo $this->sumdays+1; echo '" bgcolor="black"><img src="' . $this->image1pix . '"></td>' . "\n";
			echo '</tr>' . "\n";
		}

		/**
		*
		* private class for out method
		*
		* should not be used from external
		*
		*/
		function out_ruler ()
		{
			echo '<tr>' . "\n";
			echo '<td colspan="'; echo $this->sumdays+1; echo '" bgcolor="#999999"><img src="' . $this->image1pix .'"></td>' . "\n";
			echo '</tr>' . "\n";
		}

		/**
		*
		* private class for out method
		*
		* should not be used from external
		*
		*/
		function out_monthyear($form_link)
		{
			echo '<form action="' . $form_link . '" method="post">' . "\n";
			echo '<table border="0" width="100%" cellpadding="0" cellspacing="0">' . "\n";
			echo '<tr>' . "\n";
			echo '<td align="center"><h2>'; echo lang($this->monthname); echo ' '; echo $this->year; echo '</h2></td>' . "\n";

			if($this->selection == 1)
			{
				echo '<td align="right">' . "\n";
				echo '<select name="month"'; 

				for($i=0;$i<13;$i++)
				{
					if ($this->month == $i)
					{
						$sel = ' selected';
					}
					else
					{
						unset($sel);
					}
					echo '<option value="' . $i . '"' . $sel . '>' . $i . '</option>';
				}

				echo '</select>' . "\n";
				echo '<select name="year"';

				for($i = date('Y') -2;$i<date('Y')+5;$i++)
				{
					if($this->year == $i)
					{
						$sel = ' selected';
					}
					else
					{
						unset($sel);
					}
					echo '<option value="' . $i . '"' . $sel . '>' . $i .'</option>'; 
				}

				echo '</select>' . "\n";
				echo '&nbsp;&nbsp;<input type="submit" name="selection" value="' . lang('Filter') . '">&nbsp;&nbsp;';
				echo '</td>' . "\n";
			}

			echo '</tr>' . "\n";
			echo '</table>' . "\n";
			echo '</form>' . "\n";
		}
	}
?>