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| var querystring = require('querystring'),
util = require('util'),
AbstractGeocoder = require('./abstractgeocoder');
/**
* Constructor
*/
var MapQuestGeocoder = function OpenMapQuestGeocoder(httpAdapter, apiKey) {
MapQuestGeocoder.super_.call(this, httpAdapter);
if (!apiKey || apiKey == 'undefined') {
throw new Error(this.constructor.name + ' needs an apiKey');
}
this.apiKey = apiKey;
this._endpoint = 'http://open.mapquestapi.com/geocoding/v1';
};
util.inherits(MapQuestGeocoder, AbstractGeocoder);
/**
* Geocode
* @param <string> value Value to geocode (Address)
* @param <function> callback Callback method
*/
MapQuestGeocoder.prototype._geocode = function (value, callback) {
var _this = this;
this.httpAdapter.get(this._endpoint + '/address', {
'location': value,
'key': querystring.unescape(this.apiKey)
}, function (err, result) {
if (err) {
return callback(err);
} else {
if (result.info.statuscode !== 0) {
return callback(new Error('Status is ' + result.info.statuscode + ' ' + result.info.messages[0]), {raw: result});
}
var results = [];
var locations = result.results[0].locations;
for (var i = 0; i < locations.length; i++) {
results.push(_this._formatResult(locations[i]));
}
results.raw = result;
callback(false, results);
}
});
};
MapQuestGeocoder.prototype._formatResult = function (result) {
var MQConfidenceLookup = {
POINT: 1,
ADDRESS: 0.9,
INTERSECTION: 0.8, //less accurate than the MQ description
STREET: 0.7,
ZIP: 0.5,
ZIP_EXTENDED: 0.5,
NEIGHBORHOOD: 0.5,
CITY: 0.4,
COUNTY: 0.3,
STATE: 0.2,
COUNTRY: 0.1
};
return {
'latitude': result.latLng.lat,
'longitude': result.latLng.lng,
'country': null,
'countryCode': result.adminArea1,
'city': result.adminArea5,
'state': result.adminArea3,
'zipcode': result.postalCode,
'streetName': result.street,
'streetNumber': null,
'extra': {
confidence: MQConfidenceLookup[result.geocodeQuality] || 0
}
};
};
/**
* Reverse geocoding
* @param {lat:<number>,lon:<number>} lat: Latitude, lon: Longitude
* @param <function> callback Callback method
*/
MapQuestGeocoder.prototype._reverse = function (query, callback) {
var lat = query.lat;
var lng = query.lon;
var _this = this;
this.httpAdapter.get(this._endpoint + '/reverse', {
'location': lat + ',' + lng,
'key': querystring.unescape(this.apiKey)
}, function (err, result) {
if (err) {
return callback(err);
} else {
var results = [];
var locations;
if (result.results === undefined || !result.results.length) {
return callback(new Error('Incorrect response'));
}
locations = result.results[0].locations;
for (var i = 0; i < locations.length; i++) {
results.push(_this._formatResult(locations[i]));
}
results.raw = result;
callback(false, results);
}
});
};
module.exports = MapQuestGeocoder;
|