<?php

// Map Specific Files
require_once(CMAP_BASE . "/maps/genGoogle.php");
require_once(CMAP_BASE . "/maps/genYahoo.php");
require_once(CMAP_BASE . "/maps/genGEarth.php");

/**
 * Static class used to generate the actual map code.  Contains common map methods
 * but most methods are within the extended map specific classes.
 *
 * $Id$
 *
 * @package CMap
 * @license http://opensource.org/licenses/gpl-license.php GNU General Public License
 * @author Bryan Rite <brite@alkaloid.net>
 * @version 0.2
 */
class Map {

	/**
	 * Static method that creates and outputs the actual map code based on
	 * the CMap object.  Defaults to a Google Map.
	 * @param CMap A Cmap object used to generate the map code.
	 */
	function genMap($CMap) {
		switch($CMap->mapType) {
			case GOOGLE_MAP: 
				genGoogle::makeMap($CMap);
				break;
			case YAHOO_MAP;
				genYahoo::makeMap($CMap);
				break;
			case GEARTH_FILE;
				genGEarth::makeMap($CMap);
				break;
			default:
				genGoogle::makeMap($CMap);
				break;
		}	
	}
	
	/**
	 * Private method used by Map's extended classes to calculate the center coordinates
	 * of the map.
	 * @access private
	 * @param CMap $CMap The CMap object used to calculate the center coordinates.
	 * @return Coord The coordinate of the center of the map.
	 */
	function calcCenter($CMap) {
		$x = 0;
		$topLat = $btmLat = $CMap->location[$x]->getLat();
		$topLng = $btmLng = $CMap->location[$x]->getLng();
		while ($x < count($CMap->location)) {
			if ($topLat < $CMap->location[$x]->getLat()) {$topLat = $CMap->location[$x]->getLat();}
			if ($topLng < $CMap->location[$x]->getLng()) {$topLng = $CMap->location[$x]->getLng();}
			if ($btmLat > $CMap->location[$x]->getLat()) {$btmLat = $CMap->location[$x]->getLat();}
			if ($btmLng > $CMap->location[$x]->getLng()) {$btmLng = $CMap->location[$x]->getLng();}		
			$x += 1;
		}
		return new Coord( (($topLat + $btmLat) / 2), (($topLng + $btmLng) / 2) );
	}
	
	
	/**
	 * Private method used to calculate the span, which is the difference between the most outlier
	 * coordinates.
	 * @access private
	 * @param CMap $CMap The CMap object used to calculate the span lat/long pair.
	 * @return Coord The latitude longitude pair of the span.
	 */
	function calcSpan($CMap) {
		$x = 0;
		$topLat = $btmLat = $CMap->location[$x]->getLat();
		$topLng = $btmLng = $CMap->location[$x]->getLng();
		while ($x < count($CMap->location)) {
			if ($topLat < $CMap->location[$x]->getLat()) {$topLat = $CMap->location[$x]->getLat();}
			if ($topLng < $CMap->location[$x]->getLng()) {$topLng = $CMap->location[$x]->getLng();}
			if ($btmLat > $CMap->location[$x]->getLat()) {$btmLat = $CMap->location[$x]->getLat();}
			if ($btmLng > $CMap->location[$x]->getLng()) {$btmLng = $CMap->location[$x]->getLng();}		
			$x += 1;
		}
		// Personal kick out - if not, maps are too close.
		$spanLat = (($topLat - $btmLat)*1.15);
		$spanLng = (($topLng - $btmLng)*1.15);
		return new Coord ( $spanLng, $spanLat);
	}
}
?>