# All files / lib/geocoder heregeocoder.js

94.38% Statements 84/89
70.59% Branches 48/68
100% Functions 7/7
94.38% Lines 84/89

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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;