# Source: open-layers/ol-geocoder.js

    /**

     * @namespace WPGMZA

     * @module OLGeocoder

     * @requires WPGMZA.Geocoder

     */

    (function($) {

    	/**

    	 * @class OLGeocoder

    	 * @extends Geocoder

    	 * @summary OpenLayers geocoder - uses Nominatim by default

    	 */

    	WPGMZA.OLGeocoder = function()

    	{

    	}

    	WPGMZA.OLGeocoder.prototype = Object.create(WPGMZA.Geocoder.prototype);

    	WPGMZA.OLGeocoder.prototype.constructor = WPGMZA.OLGeocoder;

    	/**

    	 * @function getResponseFromCache

    	 * @access protected

    	 * @summary Tries to retrieve cached coordinates from server cache

    	 * @param {string} address The street address to geocode

    	 * @param {function} callback Where to send the results, as an array

    	 * @return {void}

    	 */

    	WPGMZA.OLGeocoder.prototype.getResponseFromCache = function(address, callback)

    	{

    		$.ajax(WPGMZA.ajaxurl, {

    			data: {

    				action: "wpgmza_query_nominatim_cache",

    				query: address

    			},

    			success: function(response, xhr, status) {

    				callback(response);

    			}

    		});

    	}

    	/**

    	 * @function getResponseFromNominatim

    	 * @access protected

    	 * @summary Queries Nominatim on the specified address

    	 * @param {object} options An object containing the options for geocoding, address is a mandatory field

    	 * @param {function} callback The function to send the results to, as an array

    	 */

    	WPGMZA.OLGeocoder.prototype.getResponseFromNominatim = function(options, callback)

    	{

    		var data = {

    			q: options.address,

    			format: "json"

    		};

    		if(options.country)

    			data.countrycodes = options.country;

    		$.ajax("https://nominatim.openstreetmap.org/search/", {

    			data: data,

    			success: function(response, xhr, status) {

    				callback(response);

    			},

    			error: function(response, xhr, status) {

    				callback(null, WPGMZA.Geocoder.FAIL)

    			}

    		});

    	}

    	/**

    	 * @function cacheResponse

    	 * @access protected

    	 * @summary Caches a response on the server, usually after it's been returned from Nominatim

    	 * @param {string} address The street address

    	 * @param {object|array} response The response to cache

    	 * @returns {void}

    	 */

    	WPGMZA.OLGeocoder.prototype.cacheResponse = function(address, response)

    	{

    		$.ajax(WPGMZA.ajaxurl, {

    			data: {

    				action: "wpgmza_store_nominatim_cache",

    				query: address,

    				response: JSON.stringify(response)

    			},

    			method: "POST"

    		});

    	}

    	/**

    	 * @function getLatLngFromAddress

    	 * @access public

    	 * @summary Attempts to geocode an address, firstly by checking the cache for previous

    	 * results, if this fails the Nominatim server will be queried, cached and sent to the

    	 * specified callback

    	 * @param {object} options An object containing the options for geocoding, address is a mandatory field

    	 * @param {function} callback The function to send the results to, as an array

    	 * @returns {void}

    	 */

    	WPGMZA.OLGeocoder.prototype.getLatLngFromAddress = function(options, callback)

    	{

    		var self = this;

    		var address = options.address;

    		var latLng;

    		if(latLng = WPGMZA.isLatLngString(address))

    			return WPGMZA.Geocoder.prototype.getLatLngFromAddress.call(this, options, callback);

    		function finish(response, status)

    		{

    			for(var i = 0; i < response.length; i++)

    			{

    				response[i].geometry = {

    					location: new WPGMZA.LatLng({

    						lat: parseFloat(response[i].lat),

    						lng: parseFloat(response[i].lon)

    					})

    				};

    				response[i].lat = parseFloat(response[i].lat);

    				response[i].lng = parseFloat(response[i].lon);

    			}

    			callback(response, status);

    		}

    		this.getResponseFromCache(address, function(response) {

    			if(response.length)

    			{

    				finish(response, WPGMZA.Geocoder.SUCCESS);

    				return;

    			}

    			self.getResponseFromNominatim(options, function(response, status) {

    				if(status == WPGMZA.Geocoder.FAIL)

    				{

    					callback(null, WPGMZA.Geocoder.FAIL);

    					return;

    				}

    				if(response.length == 0)

    				{

    					callback(response, WPGMZA.Geocoder.ZERO_RESULTS);

    					return;

    				}

    				finish(response, WPGMZA.Geocoder.SUCCESS);

    				self.cacheResponse(address, response);

    			});

    		});

    	}

    })(jQuery);