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| var util = require('util'),
AbstractGeocoder = require('./abstractgeocoder');
/**
* Constructor
* @param <object> httpAdapter Http Adapter
* @param <object> options Options (appId, appCode, language, politicalView, country, state)
*/
var HereGeocoder = function HereGeocoder(httpAdapter, options) {
this.options = ['appId', 'appCode', 'language', 'politicalView', 'country', 'state'];
HereGeocoder.super_.call(this, httpAdapter, options);
if (!this.options.appId || !this.options.appCode) {
throw new Error('You must specify appId and appCode to use Here Geocoder');
}
};
util.inherits(HereGeocoder, AbstractGeocoder);
// Here geocoding API endpoint
HereGeocoder.prototype._geocodeEndpoint = 'https://geocoder.cit.api.here.com/6.2/geocode.json';
// Here reverse geocoding API endpoint
HereGeocoder.prototype._reverseEndpoint = 'https://reverse.geocoder.api.here.com/6.2/reversegeocode.json';
/**
* Geocode
* @param <string> value Value ton geocode (Address)
* @param <function> callback Callback method
*/
HereGeocoder.prototype._geocode = function (value, callback) {
var _this = this;
var params = this._prepareQueryString();
if (value.address) {
Iif (value.language) {
params.language = value.language;
}
Iif (value.politicalView) {
params.politicalview = value.politicalView;
}
Eif (value.country) {
params.country = value.country;
Iif (value.state) {
params.state = value.state;
} else {
delete params.state;
}
}
if (value.zipcode) {
params.postalcode = value.zipcode;
}
params.searchtext = value.address;
} else {
params.searchtext = value;
}
this.httpAdapter.get(this._geocodeEndpoint, params, function (err, result) {
var results = [];
results.raw = result;
if (err) {
return callback(err, results);
} else {
var view = result.Response.View[0];
Iif (!view) {
return callback(false, results);
}
// Format each geocoding result
results = view.Result.map(_this._formatResult);
results.raw = result;
callback(false, results);
}
});
};
HereGeocoder.prototype._prepareQueryString = function () {
var params = {
'additionaldata': 'Country2,true',
'gen': 8
};
Eif (this.options.appId) {
params.app_id = this.options.appId;
}
Eif (this.options.appCode) {
params.app_code = this.options.appCode;
}
if (this.options.language) {
params.language = this.options.language;
}
if (this.options.politicalView) {
params.politicalview = this.options.politicalView;
}
if (this.options.country) {
params.country = this.options.country;
}
if (this.options.state) {
params.state = this.options.state;
}
return params;
};
HereGeocoder.prototype._formatResult = function (result) {
var location = result.Location || {};
var address = location.Address || {};
var i;
var extractedObj = {
formattedAddress: address.Label || null,
latitude: location.DisplayPosition.Latitude,
longitude: location.DisplayPosition.Longitude,
country: null,
countryCode: address.Country || null,
state: address.State || null,
county: address.County || null,
city: address.City || null,
zipcode: address.PostalCode || null,
district: address.District || null,
streetName: address.Street || null,
streetNumber: address.HouseNumber || null,
building: address.Building || null,
extra: {
herePlaceId: location.LocationId || null,
confidence: result.Relevance || 0
},
administrativeLevels: {}
};
for (i = 0; i < address.AdditionalData.length; i++) {
var additionalData = address.AdditionalData[i];
switch (additionalData.key) {
//Country 2-digit code
case 'Country2':
extractedObj.countryCode = additionalData.value;
break;
//Country name
case 'CountryName':
extractedObj.country = additionalData.value;
break;
//State name
case 'StateName':
extractedObj.administrativeLevels.level1long = additionalData.value;
extractedObj.state = additionalData.value;
break;
//County name
case 'CountyName':
extractedObj.administrativeLevels.level2long = additionalData.value;
extractedObj.county = additionalData.value;
}
}
return extractedObj;
};
/**
* Reverse geocoding
* @param {lat:<number>,lon:<number>} lat: Latitude, lon: Longitude
* @param <function> callback Callback method
*/
HereGeocoder.prototype._reverse = function (query, callback) {
var lat = query.lat;
var lng = query.lon;
var _this = this;
var params = this._prepareQueryString();
params.pos = lat + ',' + lng;
params.mode = 'trackPosition';
this.httpAdapter.get(this._reverseEndpoint, params, function (err, result) {
var results = [];
results.raw = result;
if (err) {
return callback(err, results);
} else {
var view = result.Response.View[0];
Iif (!view) {
return callback(false, results);
}
// Format each geocoding result
results = view.Result.map(_this._formatResult);
results.raw = result;
callback(false, results);
}
});
};
module.exports = HereGeocoder;
|