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| 'use strict';
var crypto = require('crypto');
var url = require('url');
var util = require('util');
var AbstractGeocoder = require('./abstractgeocoder');
/**
* Constructor
* @param <object> httpAdapter Http Adapter
* @param <object> options Options (language, clientId, apiKey, region, excludePartialMatches)
*/
var GoogleGeocoder = function GoogleGeocoder(httpAdapter, options) {
this.options = ['language', 'apiKey', 'clientId', 'region', 'excludePartialMatches', 'channel'];
GoogleGeocoder.super_.call(this, httpAdapter, options);
if (this.options.clientId && !this.options.apiKey) {
throw new Error('You must specify a apiKey (privateKey)');
}
Iif (this.options.apiKey && !httpAdapter.supportsHttps()) {
throw new Error('You must use https http adapter');
}
};
util.inherits(GoogleGeocoder, AbstractGeocoder);
// Google geocoding API endpoint
GoogleGeocoder.prototype._endpoint = 'https://maps.googleapis.com/maps/api/geocode/json';
/**
* Geocode
* @param <string> value Value ton geocode (Address)
* @param <function> callback Callback method
*/
GoogleGeocoder.prototype._geocode = function (value, callback) {
var _this = this;
var params = this._prepareQueryString();
if (value.address) {
var components = null;
if (value.country) {
components = 'country:' + value.country;
}
if (value.zipcode) {
Eif (components) {
components += '|';
}
components += 'postal_code:' + value.zipcode;
}
params.components = this._encodeSpecialChars(components);
params.address = this._encodeSpecialChars(value.address);
} else Iif (value.googlePlaceId) {
params.place_id = value.googlePlaceId;
} else {
params.address = this._encodeSpecialChars(value);
}
if (value.language) {
params.language = value.language;
}
if (value.region) {
params.region = value.region;
}
var excludePartialMatches = params.excludePartialMatches;
delete params.excludePartialMatches;
this._signedRequest(this._endpoint, params);
this.httpAdapter.get(this._endpoint, params, function (err, result) {
Iif (err) {
return callback(err);
} else {
var results = [];
// status can be "OK", "ZERO_RESULTS", "OVER_QUERY_LIMIT", "REQUEST_DENIED", "INVALID_REQUEST", or "UNKNOWN_ERROR"
// error_message may or may not be present
Iif (result.status === 'ZERO_RESULTS') {
results.raw = result;
return callback(false, results);
}
if (result.status !== 'OK') {
return callback(new Error('Status is ' + result.status + '.' + (result.error_message ? ' ' + result.error_message : '')), {raw: result});
}
for (var i = 0; i < result.results.length; i++) {
var currentResult = result.results[i];
if (excludePartialMatches && excludePartialMatches === true && typeof currentResult.partial_match !== 'undefined' && currentResult.partial_match === true) {
continue;
}
results.push(_this._formatResult(currentResult));
}
results.raw = result;
callback(false, results);
}
});
};
GoogleGeocoder.prototype._prepareQueryString = function () {
var params = {
'sensor': false
};
if (this.options.language) {
params.language = this.options.language;
}
if (this.options.region) {
params.region = this.options.region;
}
if (this.options.clientId) {
params.client = this.options.clientId;
} else if (this.options.apiKey) {
params.key = this.options.apiKey;
}
Iif (this.options.channel) {
params.channel = this.options.channel;
}
if (this.options.excludePartialMatches && this.options.excludePartialMatches === true) {
params.excludePartialMatches = true;
}
return params;
};
GoogleGeocoder.prototype._signedRequest = function (endpoint, params) {
if (this.options.clientId) {
var request = url.parse(endpoint);
var fullRequestPath = request.path + url.format({query: params});
var decodedKey = new Buffer(this.options.apiKey.replace('-', '+').replace('_', '/'), 'base64');
var hmac = crypto.createHmac('sha1', decodedKey);
hmac.update(fullRequestPath);
var signature = hmac.digest('base64');
signature = signature.replace(/\+/g, '-').replace(/\//g, '_');
params.signature = signature;
}
return params;
};
GoogleGeocoder.prototype._formatResult = function (result) {
var googleConfidenceLookup = {
ROOFTOP: 1,
RANGE_INTERPOLATED: 0.9,
GEOMETRIC_CENTER: 0.7,
APPROXIMATE: 0.5
};
var extractedObj = {
formattedAddress: result.formatted_address || null,
latitude: result.geometry.location.lat,
longitude: result.geometry.location.lng,
extra: {
googlePlaceId: result.place_id || null,
confidence: googleConfidenceLookup[result.geometry.location_type] || 0,
premise: null,
subpremise: null,
neighborhood: null,
establishment: null
},
administrativeLevels: {
}
};
for (var i = 0; i < result.address_components.length; i++) {
for (var x = 0; x < result.address_components[i].types.length; x++) {
var addressType = result.address_components[i].types[x];
switch (addressType) {
//Country
case 'country':
extractedObj.country = result.address_components[i].long_name;
extractedObj.countryCode = result.address_components[i].short_name;
break;
//Administrative Level 1
case 'administrative_area_level_1':
extractedObj.administrativeLevels.level1long = result.address_components[i].long_name;
extractedObj.administrativeLevels.level1short = result.address_components[i].short_name;
break;
//Administrative Level 2
case 'administrative_area_level_2':
extractedObj.administrativeLevels.level2long = result.address_components[i].long_name;
extractedObj.administrativeLevels.level2short = result.address_components[i].short_name;
break;
//Administrative Level 3
case 'administrative_area_level_3':
extractedObj.administrativeLevels.level3long = result.address_components[i].long_name;
extractedObj.administrativeLevels.level3short = result.address_components[i].short_name;
break;
//Administrative Level 4
case 'administrative_area_level_4':
extractedObj.administrativeLevels.level4long = result.address_components[i].long_name;
extractedObj.administrativeLevels.level4short = result.address_components[i].short_name;
break;
//Administrative Level 5
case 'administrative_area_level_5':
extractedObj.administrativeLevels.level5long = result.address_components[i].long_name;
extractedObj.administrativeLevels.level5short = result.address_components[i].short_name;
break;
// City
case 'locality':
case 'postal_town':
extractedObj.city = result.address_components[i].long_name;
break;
// Address
case 'postal_code':
extractedObj.zipcode = result.address_components[i].long_name;
break;
case 'route':
extractedObj.streetName = result.address_components[i].long_name;
break;
case 'street_number':
extractedObj.streetNumber = result.address_components[i].long_name;
break;
case 'premise':
extractedObj.extra.premise = result.address_components[i].long_name;
break;
case 'subpremise':
extractedObj.extra.subpremise = result.address_components[i].long_name;
break;
case 'establishment':
extractedObj.extra.establishment = result.address_components[i].long_name;
break;
case 'sublocality_level_1':
case 'political':
case 'sublocality':
case 'neighborhood':
if(!extractedObj.extra.neighborhood) {
extractedObj.extra.neighborhood = result.address_components[i].long_name;
}
break;
}
}
}
return extractedObj;
};
/**
* Reverse geocoding
* @param {lat:<number>,lon:<number>} lat: Latitude, lon: Longitude
* @param <function> callback Callback method
*/
GoogleGeocoder.prototype._reverse = function (query, callback) {
var lat = query.lat;
var lng = query.lon;
var _this = this;
var params = this._prepareQueryString();
params.latlng = lat + ',' + lng;
if (query.language) {
params.language = query.language;
}
if (query.result_type) {
params.result_type = query.result_type;
}
if (query.location_type) {
params.location_type = query.location_type;
}
this._signedRequest(this._endpoint, params);
this.httpAdapter.get(this._endpoint, params, function (err, result) {
Iif (err) {
return callback(err);
} else {
// status can be "OK", "ZERO_RESULTS", "OVER_QUERY_LIMIT", "REQUEST_DENIED", "INVALID_REQUEST", or "UNKNOWN_ERROR"
// error_message may or may not be present
if (result.status !== 'OK') {
return callback(new Error('Status is ' + result.status + '.' + (result.error_message ? ' ' + result.error_message : '')), {raw: result});
}
var results = [];
Eif (result.results.length > 0) {
results.push(_this._formatResult(result.results[0]));
}
results.raw = result;
callback(false, results);
}
});
};
GoogleGeocoder.prototype._encodeSpecialChars = function(value) {
if (typeof value === 'string') {
return value.replace(/\u001a/g, ' ');
}
return value;
};
module.exports = GoogleGeocoder;
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