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| var util = require('util'),
AbstractGeocoder = require('./abstractgeocoder');
// http://geocoder.opencagedata.com/api.html#confidence
var ConfidenceInKM = {
10: 0.25,
9: 0.5,
8: 1,
7: 5,
6: 7.5,
5: 10,
4: 15,
3: 20,
2: 25,
1: Number.POSITIVE_INFINITY,
0: Number.NaN
};
/**
* Constructor
*/
var OpenCageGeocoder = function OpenCageGeocoder(httpAdapter, apiKey, options) {
this.options = ['language'];
OpenCageGeocoder.super_.call(this, httpAdapter, options);
if (!apiKey || apiKey == 'undefined') {
throw new Error(this.constructor.name + ' needs an apiKey');
}
this.apiKey = apiKey;
this._endpoint = 'http://api.opencagedata.com/geocode/v1/json';
this._ConfidenceInKM = ConfidenceInKM; // In case we need to support v1/v2 and this changes
};
util.inherits(OpenCageGeocoder, AbstractGeocoder);
/**
* Geocode
* @param <string> value Value to geocode (Address)
* @param <function> callback Callback method
*/
OpenCageGeocoder.prototype._geocode = function (value, callback) {
var _this = this;
var params = this._getCommonParams();
if (value.address) {
Eif (value.bounds) {
Eif (Array.isArray(value.bounds)) {
params.bounds = value.bounds.join(',');
}
else {
params.bounds = value.bounds;
}
}
Eif (value.countryCode) {
params.countrycode = value.countryCode;
}
Eif (value.limit) {
params.limit = value.limit;
}
Eif (value.minConfidence) {
params.min_confidence = value.minConfidence;
}
params.q = value.address;
}
else {
params.q = value;
}
this.httpAdapter.get(this._endpoint, params, function (err, result) {
Iif (err) {
return callback(err);
} else {
var results = [];
Eif (result && result.results instanceof Array) {
for (var i = 0; i < result.results.length; i++) {
results.push(_this._formatResult(result.results[i]));
}
}
results.raw = result;
callback(false, results);
}
});
};
OpenCageGeocoder.prototype._formatResult = function (result) {
var confidence = result.confidence || 0;
return {
'latitude': result.geometry.lat,
'longitude': result.geometry.lng,
'country': result.components.country,
'city': result.components.city,
'state': result.components.state,
'zipcode': result.components.postcode,
'streetName': result.components.road,
'streetNumber': result.components.house_number,
'countryCode': result.components.country_code,
'county': result.components.county,
'extra': {
confidence: confidence,
confidenceKM: this._ConfidenceInKM[result.confidence] || Number.NaN
}
};
};
/**
* Reverse geocoding
* @param {lat:<number>,lon:<number>} lat: Latitude, lon: Longitude
* @param <function> callback Callback method
*/
OpenCageGeocoder.prototype._reverse = function (query, callback) {
var lat = query.lat;
var lng = query.lon;
var _this = this;
var params = this._getCommonParams();
params.q = lat + ' ' + lng;
this.httpAdapter.get(this._endpoint, params, function (err, result) {
Iif (err) {
callback(err);
} else {
var results = [];
Eif (result && result.results instanceof Array) {
for (var i = 0; i < result.results.length; i++) {
results.push(_this._formatResult(result.results[i]));
}
}
results.raw = result;
callback(false, results);
}
});
};
/**
* Prepare common params
*
* @return <Object> common params
*/
OpenCageGeocoder.prototype._getCommonParams = function () {
var params = {};
params.key = this.apiKey;
Iif (this.options.language) {
params.language = this.options.language;
}
return params;
};
module.exports = OpenCageGeocoder;
|