<?php
# $Id: class_gml2.php 3099 2008-10-02 15:29:23Z nimix $
# http://www.mapbender.org/index.php/class_gml2.php
# Copyright (C) 2002 CCGIS 
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

require_once(dirname(__FILE__)."/../../core/globalSettings.php");
require_once(dirname(__FILE__)."/../classes/class_json.php");
require_once(dirname(__FILE__)."/../classes/class_gml_geometry.php");


class GMLPolygon extends GmlGeometry {

	var $pointArray = array();
	var $innerRingArray = array();

	public function __construct() {
		
	}

	
	public function addPoint ($x, $y) {
		array_push($this->pointArray, array("x" => $x, "y" => $y));
	}
	
	public function addPointToRing ($i, $x, $y) {
		if (count($this->innerRingArray) < $i) {
			array_push($this->innerRingArray, array());
		}
		array_push($this->innerRingArray[$i-1], array("x" => $x, "y" => $y));
	}
	
	public function toGml2 () {
		$str = "<gml:MultiPolygon srsName=\"$this->srs\">" . 
			"<gml:polygonMember><gml:Polygon><gml:outerBoundaryIs>" . 
			"<gml:LinearRing><gml:coordinates>";

		$ptArray = array();
		foreach ($this->pointArray as $point) {
			$ptArray[] = $point["x"] . "," . $point["y"];
		}
		$str .= implode(" ", $ptArray);

		$str .= '</gml:coordinates></gml:LinearRing></gml:outerBoundaryIs>';
				
		foreach ($this->innerRingArray as $ring) {
			$str .= "<gml:innerBoundaryIs><gml:LinearRing><gml:coordinates>";
			$ptArray = array();
			foreach ($ring as $point) {
				$ptArray[] = $point["x"] . "," . $point["y"];
			}
			$str .= implode(" ", $ptArray);
			
			$str .= "</gml:coordinates></gml:LinearRing></gml:innerBoundaryIs>";
		}
		$str .= "</gml:Polygon></gml:polygonMember></gml:MultiPolygon>";
		return $str;
	}
	
	public function toGml3 () {
		$str = "<gml:MultiSurface srsName=\"$this->srs\">" . 
			"<gml:surfaceMember><gml:Polygon><gml:exterior>" . 
			"<gml:LinearRing>";

		$ptArray = array();
		foreach ($this->pointArray as $point) {
			$ptArray[] = "<gml:pos>" . $point["x"] . " " . $point["y"] . "</gml:pos>";
		}
		$str .= implode("", $ptArray);

		$str .= '</gml:LinearRing></gml:exterior>';
				
		foreach ($this->innerRingArray as $ring) {
			$str .= "<gml:interior><gml:LinearRing>";
			$ptArray = array();
			foreach ($ring as $point) {
				$ptArray[] = "<gml:pos>" . $point["x"] . " " . $point["y"] . "</gml:pos>";
			}
			$str .= implode("", $ptArray);
			
			$str .= "</gml:LinearRing></gml:interior>";
		}
		$str .= "</gml:Polygon></gml:surfaceMember></gml:MultiSurface>";
		return $str;
	}
	
	public function isEmpty () {
		return !(count($this->pointArray) > 0);
	}
	
	public function toGeoJSON () {
		$numberOfPoints = count($this->pointArray);
		$str = "";
		if ($numberOfPoints > 0) {
			$str .= "{\"type\": \"Polygon\", \"coordinates\":[[";
			for ($i=0; $i < $numberOfPoints; $i++) {
				if ($i > 0) {
					$str .= ",";
				}
				if (in_array($this->srs, $this->latLonSrs)) {
					$str .= "[".$this->pointArray[$i]["y"].",".$this->pointArray[$i]["x"]."]";
				}
				else {
					$str .= "[".$this->pointArray[$i]["x"].",".$this->pointArray[$i]["y"]."]";
				}
			}
			$str .= "]";
			
			for ($i=0; $i < count($this->innerRingArray); $i++) {
				$str .= ",[";
				for ($j=0; $j < count($this->innerRingArray[$i]); $j++) {
					if ($j > 0) {
						$str .= ",";
					}
					if (in_array($this->srs, $this->latLonSrs)) {
						$str .= "[".$this->innerRingArray[$i][$j]["y"].",".$this->innerRingArray[$i][$j]["x"]."]";
					}
					else {
						$str .= "[".$this->innerRingArray[$i][$j]["x"].",".$this->innerRingArray[$i][$j]["y"]."]";
					}
				}
				$str .= "]";
			}
			$str .= "]}";
		}
		else {
			$e = new mb_exception("GMLPolygon: toGeoJSON: this point is null.");
		}
		return $str;
	}
}
?>