leaflet-control-geocoder/src/geocoders/mapquest.js

Extendable geocoder with builtin support for Nominatim, Bing, Google, Mapbox, Photon, What3Words, MapQuest, Mapzen

var L = require('leaflet'),
	Util = require('../util');

module.exports = {
	class: L.Class.extend({
		options: {
			serviceUrl: '//www.mapquestapi.com/geocoding/v1'
		},

		initialize: function(key, options) {
			// MapQuest seems to provide URI encoded API keys,
			// so to avoid encoding them twice, we decode them here
			this._key = decodeURIComponent(key);

			L.Util.setOptions(this, options);
		},

		_formatName: function() {
			var r = [],
				i;
			for (i = 0; i < arguments.length; i++) {
				if (arguments[i]) {
					r.push(arguments[i]);
				}
			}

			return r.join(', ');
		},

		geocode: function(query, cb, context) {
			Util.jsonp(this.options.serviceUrl + '/address', {
				key: this._key,
				location: query,
				limit: 5,
				outFormat: 'json'
			}, function(data) {
				var results = [],
					loc,
					latLng;
				if (data.results && data.results[0].locations) {
					for (var i = data.results[0].locations.length - 1; i >= 0; i--) {
						loc = data.results[0].locations[i];
						latLng = L.latLng(loc.latLng);
						results[i] = {
							name: this._formatName(loc.street, loc.adminArea4, loc.adminArea3, loc.adminArea1),
							bbox: L.latLngBounds(latLng, latLng),
							center: latLng
						};
					}
				}

				cb.call(context, results);
			}, this);
		},

		reverse: function(location, scale, cb, context) {
			Util.jsonp(this.options.serviceUrl + '/reverse', {
				key: this._key,
				location: location.lat + ',' + location.lng,
				outputFormat: 'json'
			}, function(data) {
				var results = [],
					loc,
					latLng;
				if (data.results && data.results[0].locations) {
					for (var i = data.results[0].locations.length - 1; i >= 0; i--) {
						loc = data.results[0].locations[i];
						latLng = L.latLng(loc.latLng);
						results[i] = {
							name: this._formatName(loc.street, loc.adminArea4, loc.adminArea3, loc.adminArea1),
							bbox: L.latLngBounds(latLng, latLng),
							center: latLng
						};
					}
				}

				cb.call(context, results);
			}, this);
		}
	}),

	factory: function(key, options) {
		return new L.Control.Geocoder.MapQuest(key, options);
	}
};