Add ArcGis geocoding service (#120)

* Add ArcGis geocoding service

* Add ArcGis geocoding service

* Rename acrgis to arcgis

* fix typo

* add missing ArcGis.class

* Rename arcgis to arcgis.js

* fix code

* Add ArcGis geocoding service

Author: kuzvac

src/geocoders/arcgis.js

@@ -0,0 +1,83 @@
+var L = require('leaflet'),
+	Util = require('../util');
+
+module.exports = {
+	class: L.Class.extend({
+		options: {
+			service_url: 'http://geocode.arcgis.com/arcgis/rest/services/World/GeocodeServer'
+		},
+
+		initialize: function(accessToken, options) {
+			L.setOptions(this, options);
+			this._accessToken = accessToken;
+		},
+
+		geocode: function(query, cb, context) {
+			var params = {
+				SingleLine: query,
+				outFields: 'Addr_Type',
+				forStorage: false,
+				maxLocations: 10,
+				f: 'json'
+			};
+
+			if (this._key && this._key.length) {
+				params.token = this._key;
+			}
+
+			Util.getJSON(this.options.service_url + '/findAddressCandidates', params, function(data) {
+				var results = [],
+					loc,
+					latLng,
+					latLngBounds;
+
+				if (data.candidates && data.candidates.length) {
+					for (var i = 0; i <= data.candidates.length - 1; i++) {
+						loc = data.candidates[i];
+						latLng = L.latLng(loc.location.y, loc.location.x);
+						latLngBounds = L.latLngBounds(L.latLng(loc.extent.ymax, loc.extent.xmax), L.latLng(loc.extent.ymin, loc.extent.xmin));
+						results[i] = {
+								name: loc.address,
+								bbox: latLngBounds,
+								center: latLng
+						};
+					}
+				}
+
+				cb.call(context, results);
+			});
+		},
+
+		suggest: function(query, cb, context) {
+			return this.geocode(query, cb, context);
+		},
+
+		reverse: function(location, scale, cb, context) {
+			var params = {
+				location: encodeURIComponent(location.lng) + ',' + encodeURIComponent(location.lat),
+				distance: 100,
+				f: 'json'
+			};
+
+			Util.getJSON(this.options.service_url + '/reverseGeocode', params, function(data) {
+				var result = [],
+					loc;
+
+				if (data && !data.error) {
+					loc = L.latLng(data.location.y, data.location.x);
+					result.push({
+						name: data.address.Match_addr,
+						center: loc,
+						bounds: L.latLngBounds(loc, loc)
+					});
+				}
+
+				cb.call(context, result);
+			});
+		}
+	}),
+
+	factory: function(accessToken, options) {
+		return new L.Control.Geocoder.ArcGis(accessToken, options);
+	}
+};

src/index.js

@@ -7,7 +7,8 @@ var L = require('leaflet'),
 	What3Words = require('./geocoders/what3words'),
 	Google = require('./geocoders/google'),
 	Photon = require('./geocoders/photon'),
-	Mapzen = require('./geocoders/mapzen');
+	Mapzen = require('./geocoders/mapzen'),
+	ArcGis = require('./geocoders/arcgis');
 
 module.exports = L.Util.extend(Control.class, {
 	Nominatim: Nominatim.class,
@@ -25,7 +26,9 @@ module.exports = L.Util.extend(Control.class, {
 	Photon: Photon.class,
 	photon: Photon.factory,
 	Mapzen: Mapzen.class,
-	mapzen: Mapzen.factory
+	mapzen: Mapzen.factory,
+	ArcGis: ArcGis.class,
+	arcgis: ArcGis.factory
 });
 
 L.Util.extend(L.Control, {