<?php

/**

 *  An example CORS-compliant method.  It will allow any GET, POST, or OPTIONS requests from any

 *  origin.

 *

 *  In a production environment, you probably want to be more restrictive, but this gives you

 *  the general idea of what is involved.  For the nitty-gritty low-down, read:

 *

 *  - https://developer.mozilla.org/en/HTTP_access_control

 *  - http://www.w3.org/TR/cors/

 *

 */

function cors() {

    // Allow from any origin

    if (isset($_SERVER['HTTP_ORIGIN'])) {

        header("Access-Control-Allow-Origin: {$_SERVER['HTTP_ORIGIN']}");

        header('Access-Control-Allow-Credentials: true');

        header('Access-Control-Max-Age: 86400');    // cache for 1 day

    }

    // Access-Control headers are received during OPTIONS requests

    if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {

        if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD']))

            header("Access-Control-Allow-Methods: GET, POST, OPTIONS");

        if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']))

            header("Access-Control-Allow-Headers: {$_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']}");

        exit(0);

    }

}

cors();

function ref_point_to_geoJSONFeature($name, $values) {

	return array("type" => "Feature",

	             "geometry" => array(

	                                 "type" => "Point",

	                                 "coordinates" => [$values[1],$values[0]]

	                                 ),

	             "properties" => array("name" => $name)

	             );

}

function get_ref_points() {

	$ref_points_filename = '../ref_points.local.php';

	if (file_exists($ref_points_filename)) {

		include $ref_points_filename;

		return $ref_points;

	} else {

		return array();

	}

}

$json = array(

              "type" => "FeatureCollection",

              "features"=> array()

              );

foreach (get_ref_points() as $name => $vals) {

	$json['features'][] = ref_point_to_geoJSONFeature($name, $vals);

}

echo json_encode($json);

?>

	return map;

}

function mk_all_refpoints_layer() {

	var layer = new OpenLayers.Layer.Vector(

		"Reference points",{

			projection: new OpenLayers.Projection("EPSG:4326"),

			strategies: [new OpenLayers.Strategy.Fixed()],

			protocol: new OpenLayers.Protocol.HTTP({

				url: 'ajax/ref_points.php',

				format: new OpenLayers.Format.GeoJSON(),

			})

		});

	return layer;

function add_refpoint_control(layer, map) {

	var selectControl ;

	selectControl = new OpenLayers.Control.SelectFeature(

		layer,{

			onSelect:function(feature) {

				var popup = new OpenLayers.Popup.FramedCloud(

					feature.attributes.name,

					feature.geometry.getBounds().getCenterLonLat(),

					null,

					"<div>" + feature.attributes.name+"</div>",

					null, true, function() {selectControl.unselect(feature);});

				feature.popup = popup;

				map.addPopup(popup);},

			onUnselect:function(feature) {

				map.removePopup(feature.popup);

				feature.popup.destroy();

				feature.popup = null;

			}});

	map.addControl(selectControl);

	selectControl.activate();

}

window.onload = function() {

  var map = draw_cap_map();

  all_refpoints = mk_all_refpoints_layer()

  map.addLayer(all_refpoints);

  add_refpoint_control(all_refpoints, map);

}