<?php
  /**************************************************************************\
  * phpGroupWare 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 phpGroupWare API                             *
  * http://www.phpgroupware.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            *
  \**************************************************************************/

  /* $Id$ */

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)
	{
	    global $phpgw;

		for($i;$i<32;$i++)
		{
			if(checkdate($month_int,$i,$year_int)) $days++;
		}
		
		$this->month = $month_int;
		$this->year = $year_int;
		$this->set1PixelGif($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] = "$item;$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 diableSelection ()
{
	$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 ()
{
	// 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();
	
	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
		$itemname = strtok($this->items_content[$z][0],";");
		$itemcolor = strtok(";");
		
		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=\"" . $this->image1pix . "\"></td>\n";
	echo "</tr>\n";
	echo "<tr>\n";
	echo "<td>Projectname</td>\n";
	for($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 ()
{
   global $phpgw;

	echo "<form action=\"" . $phpgw->link() . "\" method=\"post\">\n";
	echo "<table border=0 width=\"100%\" cellpadding=\"0\" cellspacing=\"0\">";
	echo "<tr>\n";
	echo "<td align=\"center\"><h2>"; echo $this->monthname; echo " "; echo $this->year; echo "</h2></td>\n";
	
	if($this->selection==1)
	{
		echo "<td align=\"right\">Month: <select name=\"month\""; 
			for($i=0;$i<13;$i++) 
			{
				if($this->month==$i) $sel = " selected"; else unset($sel);
				echo "<option value=\"$i\"$sel>$i</option>"; }
		echo "</select>";
		echo "Year: <select name=\"year\"";
			for($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>";
		echo "&nbsp;<input type=\"submit\" name=\"selection\" value=\"Select\">&nbsp;";
		echo "</td>\n";
	}
	
	echo "</tr>\n";
	echo "</table>\n";
	echo "</form>\n";
}	
	
}
?>