gistfile1.php

<?php
/**
 * Map helper class
 * 
 * Portions of this class credited to: zzolo, phayes, tmcw, brynbellomy, bdragon
 *
 * @package    Map
 * @author     Ushahidi Team
 * @copyright  (c) 2008 Ushahidi Team
 * @license    http://www.ushahidi.com/license.html
 */


class map_Core {
	
	/**
	 * Generate the Javascript for Each Layer
	 * .. new OpenLayers.Layer.XXXX
	 * if $all is set to TRUE all maps are rendered
	 * **caveat is that each mapping api js must be loaded**
	 *
	 * @param   bool  $all
	 * @return  string $js
	 */
	public static function layers_js($all = FALSE)
	{
		// Javascript
		$js = "";
		
		// Get All Layers
		$layers = map::base();
		
		// Next get the default base layer
		$default_map = Kohana::config('settings.default_map');
		
		if ( ! isset($layers[$default_map]))
		{ // Map Layer Doesn't Exist - default to google
			$default_map = "google_normal";
		}
			// Get openlayers type
		$openlayers_type = $layers[$default_map]->openlayers;
		foreach ($layers as $layer)
		{
			if ($layer->active)
			{
				if ($all == TRUE)
				{
					$js .= "var ".$layer->name." = new OpenLayers.Layer.".$layer->openlayers."(\"".$layer->title."\", { \n";
					$js .= (isset($layer->data['type']) AND !empty($layer->data['type'])) ? " type: ".$layer->data['type'].",\n"
						: "";
					$js .= " sphericalMercator: true,\n";
					$js .= " maxExtent: new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34)\n});\n\n";
				}
				else
				{
					if ($layer->openlayers == $openlayers_type)
					{
						$js .= "var ".$layer->name." = new OpenLayers.Layer.".$layer->openlayers."(\"".$layer->title."\", { \n";
						$js .= (isset($layer->data['type']) AND !empty($layer->data['type'])) ? " type: ".$layer->data['type'].",\n"
							: "";
						$js .= " sphericalMercator: true,\n";
						$js .= " maxExtent: new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34)\n});\n\n";
					}
				}
			}
		}
		
		return $js;
	}
	
	/**
	 * Generate the Map Array.
	 * These are the maps that show up in the Layer Switcher
	 * if $all is set to TRUE all maps are rendered
	 * **caveat is that each mapping api js must be loaded **
	 * 
	 * @param   bool  $all
	 * @return  string $js
	 */
	public static function layers_array($all = FALSE)
	{
		// Javascript
		$js = "[";

		// Get All Layers
		$layers = map::base();
		
		// Next get the default base layer
		$default_map = Kohana::config('settings.default_map');
		
		if ( ! isset($layers[$default_map]))
		{ // Map Layer Doesn't Exist - default to google
			$default_map = "google_normal";
		}
		
		// Get openlayers type
		$openlayers_type = $layers[$default_map]->openlayers;
		$js .= $default_map;
		foreach ($layers as $layer)
		{
			if ($layer->name != $default_map AND $layer->active)
			{
				if ($all == TRUE)
				{
					$js .= ",".$layer->name;
				}
				else
				{
					if ($layer->openlayers == $openlayers_type)
					{
						$js .= ",".$layer->name;
					}
				}
			}
		}
		$js .= "]";
		
		return $js;
	}
	
	/**
	 * Generate the Map Base Layer Object
	 * If a layer name is passed, it will return only the object
	 * for that layer
	 *
	 * @author
	 * @param   string  $layer_name
	 * @return  string $js
	 */
	public static function base($layer_name = NULL)
	{	
		$layers = array();

		$layer = new stdClass();
		$layer->active = TRUE;
		$layer->name = 'google_satellite';
		$layer->openlayers = "Google";
		$layer->title = 'Google Maps Satellite';
		$layer->description = 'Google Maps Satellite Imagery.';
		$layer->api_url = 'http://maps.google.com/maps?file=api&v=2&key='.Kohana::config('settings.api_google');
		$layer->api_signup = 'http://code.google.com/apis/maps/signup.html';
		$layer->data = array(
			'baselayer' => TRUE,
			'type' => 'G_SATELLITE_MAP',
		);
		$layers[$layer->name] = $layer;

		$layer = new stdClass();
		$layer->active = TRUE;
		$layer->name = 'google_hybrid';
		$layer->openlayers = "Google";
		$layer->title = 'Google Maps Hybrid';
		$layer->description = 'Google Maps with roads and terrain.';
		$layer->api_url = 'http://maps.google.com/maps?file=api&v=2&key='.Kohana::config('settings.api_google');
		$layer->api_signup = 'http://code.google.com/apis/maps/signup.html';
		$layer->data = array(
			'baselayer' => TRUE,
			'type' => 'G_HYBRID_MAP',
		);
		$layers[$layer->name] = $layer;

		$layer = new stdClass();
		$layer->active = TRUE;
		$layer->name = 'google_normal';
		$layer->openlayers = "Google";
		$layer->title = 'Google Maps Normal';
		$layer->description = 'Standard Google Maps Roads';
		$layer->api_url = 'http://maps.google.com/maps?file=api&v=2&key='.Kohana::config('settings.api_google');
		$layer->api_signup = 'http://code.google.com/apis/maps/signup.html';
		$layer->data = array(
			'baselayer' => TRUE,
			'type' => 'G_NORMAL_MAP',
		);
		$layers[$layer->name] = $layer;

		$layer = new stdClass();
		$layer->active = TRUE;
		$layer->name = 'google_physical';
		$layer->openlayers = "Google";
		$layer->title = 'Google Maps Physical';
		$layer->description = 'Google Maps Hillshades';
		$layer->api_url = 'http://maps.google.com/maps?file=api&v=2&key='.Kohana::config('settings.api_google');
		$layer->api_signup = 'http://code.google.com/apis/maps/signup.html';
		$layer->data = array(
			'baselayer' => TRUE,
			'type' => 'G_PHYSICAL_MAP',
		);
		$layers[$layer->name] = $layer;

		$layer = new stdClass();
		$layer->active = TRUE;
		$layer->name = 'yahoo_satellite';
		$layer->openlayers = "Yahoo";
		$layer->title = 'Yahoo Maps Satellite';
		$layer->description = 'Yahoo satellite imagery tiles.';
		$layer->api_url = 'http://api.maps.yahoo.com/ajaxymap?v=3.0&appid='.Kohana::config('settings.api_yahoo');
		$layer->api_signup = 'http://developer.yahoo.com/maps/simple/';
		$layer->data = array(
			'baselayer' => TRUE,
			'type' => 'YAHOO_MAP_SAT',
		);
		$layers[$layer->name] = $layer;

		$layer = new stdClass();
		$layer->active = TRUE;
		$layer->name = 'yahoo_street';
		$layer->openlayers = "Yahoo";
		$layer->title = 'Yahoo Maps Street';
		$layer->description = 'Yahoo streets tiles.';
		$layer->api_url = 'http://api.maps.yahoo.com/ajaxymap?v=3.0&appid='.Kohana::config('settings.api_yahoo');
		$layer->api_signup = 'http://developer.yahoo.com/maps/simple/';
		$layer->data = array(
			'baselayer' => TRUE,
			'type' => 'YAHOO_MAP_REG',
		);
		$layers[$layer->name] = $layer;

		$layer = new stdClass();
		$layer->active = TRUE;
		$layer->name = 'yahoo_hybrid';
		$layer->openlayers = "Yahoo";
		$layer->title = 'Yahoo Maps Hybrid';
		$layer->description = 'Yahoo hybrid of streets and satellite tiles.';
		$layer->api_url = 'http://api.maps.yahoo.com/ajaxymap?v=3.0&appid='.Kohana::config('settings.api_yahoo');
		$layer->api_signup = 'http://developer.yahoo.com/maps/simple/';
		$layer->data = array(
			'baselayer' => TRUE,
			'type' => 'YAHOO_MAP_HYB',
		);
		$layers[$layer->name] = $layer;

		$layer = new stdClass();
		$layer->active = FALSE;
		$layer->name = 'virtualearth_street';
		$layer->openlayers = "VirtualEarth";
		$layer->title = 'Virtual Earth Street';
		$layer->description = 'Virtual Earth (Bing) street tiles.';
		$layer->api_url = 'http://dev.virtualearth.net/mapcontrol/mapcontrol.ashx?v=6';
		$layer->data = array(
			'baselayer' => TRUE,
			'type' => 'VEMapStyle.Road',
		);
		$layers[$layer->name] = $layer;

		$layer = new stdClass();
		$layer->active = TRUE;
		$layer->name = 'virtualearth_satellite';
		$layer->openlayers = "VirtualEarth";
		$layer->title = 'Virtual Earth Satellite';
		$layer->description = 'Virtual Earth (Bing) satellite tiles.';
		$layer->api_url = 'http://dev.virtualearth.net/mapcontrol/mapcontrol.ashx?v=6';
		$layer->data = array(
			'baselayer' => TRUE,
			'type' => 'VEMapStyle.Aerial',
		);
		$layers[$layer->name] = $layer;

		$layer = new stdClass();
		$layer->active = TRUE;
		$layer->name = 'virtualearth_hybrid';
		$layer->openlayers = "VirtualEarth";
		$layer->title = 'Virtual Earth Hybrid';
		$layer->description = 'Virtual Earth (Bing) hybrid of streets and satellite tiles.';
		$layer->api_url = 'http://dev.virtualearth.net/mapcontrol/mapcontrol.ashx?v=6';
		$layer->data = array(
			'baselayer' => TRUE,
			'type' => 'VEMapStyle.Hybrid',
		);
		$layers[$layer->name] = $layer;

		// OpenStreetMap Mapnik
		$layer = new stdClass();
		$layer->active = TRUE;
		$layer->name = 'osm_mapnik';
		$layer->openlayers = "OSM.Mapnik";
		$layer->title = 'OSM Mapnik';
		$layer->description = 'The main OpenStreetMap map';
		$layer->api_url = 'http://www.openstreetmap.org/openlayers/OpenStreetMap.js';
		$layer->data = array(
			'baselayer' => TRUE,
			'attribution' => '&copy;<a href="@ccbysa">CCBYSA</a> 2010
				<a href="@openstreetmap">OpenStreetMap.org</a> contributors',
			'url' => 'http://tile.openstreetmap.org/${z}/${x}/${y}.png',
			'type' => ''
		);
		$layers[$layer->name] = $layer;

		// OpenStreetMap Tiles @ Home
		$layer = new stdClass();
		$layer->active = TRUE;
		$layer->name = 'osm_tah';
		$layer->openlayers = "OSM.Mapnik";
		$layer->title = 'OSM Tiles@Home';
		$layer->description = 'Alternative, community-rendered OpenStreetMap';
		$layer->api_url = 'http://www.openstreetmap.org/openlayers/OpenStreetMap.js';
		$layer->data = array(
			'baselayer' => TRUE,
			'attribution' => '&copy;<a href="@ccbysa">CCBYSA</a> 2010
				<a href="@openstreetmap">OpenStreetMap.org</a> contributors',
			'url' => 'http://tah.openstreetmap.org/Tiles/tile/${z}/${x}/${y}.png',
			'type' => ''
		);
		$layers[$layer->name] = $layer;

		// OpenStreetMap Cycling Map
		$layer = new stdClass();
		$layer->active = TRUE;
		$layer->name = 'osm_cycle';
		$layer->openlayers = "OSM.Mapnik";
		$layer->title = 'OSM Cycling Map';
		$layer->description = 'OpenStreetMap with highlighted bike lanes';
		$layer->api_url = 'http://www.openstreetmap.org/openlayers/OpenStreetMap.js';
		$layer->data = array(
			'baselayer' => TRUE,
			'attribution' => '&copy;<a href="@ccbysa">CCBYSA</a> 2010
				<a href="@openstreetmap">OpenStreetMap.org</a> contributors',
			'url' => 'http://andy.sandbox.cloudmade.com/tiles/cycle/${z}/${x}/${y}.png',
			'type' => ''
		);
		$layers[$layer->name] = $layer;

		// OpenStreetMap 426 hybrid overlay
		$layer = new stdClass();
		$layer->active = FALSE;
		$layer->name = 'osm_4326_hybrid';
		$layer->openlayers = "OSM.Mapnik";
		$layer->title = 'OSM Overlay';
		$layer->description = 'Semi-transparent hybrid overlay. Projected into 
			WSG84 for use on non spherical-mercator maps.';
		$layer->api_url = 'http://www.openstreetmap.org/openlayers/OpenStreetMap.js';
		$layer->data = array(
			'baselayer' => FALSE,
			'attribution' => '&copy;<a href="@ccbysa">CCBYSA</a> 2010
				<a href="@openstreetmap">OpenStreetMap.org</a> contributors',
			'url' => 'http://oam.hypercube.telascience.org/tiles',
			'params' => array(
				'layers' => 'osm-4326-hybrid',
			),
			'options' => array(
				'isBaseLayer' => FALSE,
				'buffer' => 1,
			),
			'type' => ''
		);
		$layers[$layer->name] = $layer;
		
		if ($layer_name)
		{
			if (isset($layers[$layer_name]))
			{
				return $layers[$layer_name];
			}
			else
			{
				return false;
			}
		}
		else
		{
			return $layers;
		}
	}
}