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| var util = require('util');
var AbstractGeocoder = require('./abstractgeocoder');
/**
* Constructor
*/
var TeleportGeocoder = function TeleportGeocoder(httpAdapter, options) {
TeleportGeocoder.super_.call(this, httpAdapter, options);
var base = 'https://api.teleport.org/api';
this._cities_endpoint = base + '/cities/';
this._locations_endpoint = base + '/locations/';
};
util.inherits(TeleportGeocoder, AbstractGeocoder);
function getEmbeddedPath(parent, path) {
var elements = path.split('/');
for ( var i in elements) {
var element = elements[i];
var embedded = parent._embedded;
Iif (!embedded) {
return undefined;
}
var child = embedded[element];
Iif (!child) {
return undefined;
}
parent = child;
}
return parent;
}
/**
* Geocode
*
* @param <string> value Value to geocode (Address)
* @param <function> callback Callback method
*/
TeleportGeocoder.prototype._geocode = function(value, callback) {
var _this = this;
var params = {};
params.search = value;
params.embed = 'city:search-results/city:item/{city:country,city:admin1_division,city:urban_area}';
this.httpAdapter.get(this._cities_endpoint, params, function(err, result) {
Iif (err) {
return callback(err);
} else {
var results = [];
Eif (result) {
var searchResults = getEmbeddedPath(result, 'city:search-results') || [];
for (var i in searchResults) {
var confidence = (25 - i) / 25.0 * 10;
results.push(_this._formatResult(searchResults[i], 'city:item', confidence));
}
}
results.raw = result;
callback(false, results);
}
});
};
TeleportGeocoder.prototype._formatResult = function(result, cityRelationName, confidence) {
var city = getEmbeddedPath(result, cityRelationName);
var admin1 = getEmbeddedPath(city, 'city:admin1_division') || {};
var country = getEmbeddedPath(city, 'city:country') || {};
var urban_area = getEmbeddedPath(city, 'city:urban_area') || {};
var urban_area_links = urban_area._links || {};
var extra = {
confidence: confidence,
urban_area: urban_area.name,
urban_area_api_url: (urban_area_links.self || {}).href,
urban_area_web_url: urban_area.teleport_city_url
};
if (result.distance_km) {
extra.distance_km = result.distance_km;
}
if (result.matching_full_name) {
extra.matching_full_name = result.matching_full_name;
}
return {
'latitude': city.location.latlon.latitude,
'longitude': city.location.latlon.longitude,
'city': city.name,
'country': country.name,
'countryCode': country.iso_alpha2,
'state': admin1.name,
'stateCode': admin1.geonames_admin1_code,
'extra': extra
};
};
/**
* Reverse geocoding
*
* @param {lat:<number>,lon:<number>} lat: Latitude, lon: Longitude
* @param <function> callback Callback method
*/
TeleportGeocoder.prototype._reverse = function(query, callback) {
var lat = query.lat;
var lng = query.lon;
var suffix = lat + ',' + lng;
var _this = this;
var params = {};
params.embed = 'location:nearest-cities/location:nearest-city/{city:country,city:admin1_division,city:urban_area}';
this.httpAdapter.get(this._locations_endpoint + suffix, params, function(err, result) {
Iif (err) {
throw err;
} else {
var results = [];
Eif (result) {
var searchResults = getEmbeddedPath(result, 'location:nearest-cities') || [];
for ( var i in searchResults) {
var searchResult = searchResults[i];
var confidence = Math.max(0, 25 - searchResult.distance_km) / 25 * 10;
results.push(_this._formatResult(searchResult, 'location:nearest-city', confidence));
}
}
results.raw = result;
callback(false, results);
}
});
};
module.exports = TeleportGeocoder;
|