Control.Geocoder.js

/* @preserve
 * Leaflet Control Geocoder 1.13.0
 * https://github.com/perliedman/leaflet-control-geocoder
 *
 * Copyright (c) 2012 sa3m (https://github.com/sa3m)
 * Copyright (c) 2018 Per Liedman
 * All rights reserved.
 */

this.L = this.L || {};
this.L.Control = this.L.Control || {};
this.L.Control.Geocoder = (function (L) {
  'use strict';

  L = L && Object.prototype.hasOwnProperty.call(L, 'default') ? L['default'] : L;

  var lastCallbackId = 0;

  // Adapted from handlebars.js
  // https://github.com/wycats/handlebars.js/
  var badChars = /[&<>"'`]/g;
  var possible = /[&<>"'`]/;
  var escape = {
    '&': '&amp;',
    '<': '&lt;',
    '>': '&gt;',
    '"': '&quot;',
    "'": '&#x27;',
    '`': '&#x60;'
  };

  function escapeChar(chr) {
    return escape[chr];
  }

  function htmlEscape(string) {
    if (string == null) {
      return '';
    } else if (!string) {
      return string + '';
    }

    // Force a string conversion as this will be done by the append regardless and
    // the regex test will do this transparently behind the scenes, causing issues if
    // an object's to string has escaped characters in it.
    string = '' + string;

    if (!possible.test(string)) {
      return string;
    }
    return string.replace(badChars, escapeChar);
  }

  function jsonp(url, params, callback, context, jsonpParam) {
    var callbackId = '_l_geocoder_' + lastCallbackId++;
    params[jsonpParam || 'callback'] = callbackId;
    window[callbackId] = L.Util.bind(callback, context);
    var script = document.createElement('script');
    script.type = 'text/javascript';
    script.src = url + getParamString(params);
    script.id = callbackId;
    document.getElementsByTagName('head')[0].appendChild(script);
  }

  function getJSON(url, params, callback) {
    var xmlHttp = new XMLHttpRequest();
    xmlHttp.onreadystatechange = function () {
      if (xmlHttp.readyState !== 4) {
        return;
      }
      var message;
      if (xmlHttp.status !== 200 && xmlHttp.status !== 304) {
        message = '';
      } else if (typeof xmlHttp.response === 'string') {
        // IE doesn't parse JSON responses even with responseType: 'json'.
        try {
          message = JSON.parse(xmlHttp.response);
        } catch (e) {
          // Not a JSON response
          message = xmlHttp.response;
        }
      } else {
        message = xmlHttp.response;
      }
      callback(message);
    };
    xmlHttp.open('GET', url + getParamString(params), true);
    xmlHttp.responseType = 'json';
    xmlHttp.setRequestHeader('Accept', 'application/json');
    xmlHttp.send(null);
  }

  function template(str, data) {
    return str.replace(/\{ *([\w_]+) *\}/g, function (str, key) {
      var value = data[key];
      if (value === undefined) {
        value = '';
      } else if (typeof value === 'function') {
        value = value(data);
      }
      return htmlEscape(value);
    });
  }

  function getParamString(obj, existingUrl, uppercase) {
    var params = [];
    for (var i in obj) {
      var key = encodeURIComponent(uppercase ? i.toUpperCase() : i);
      var value = obj[i];
      if (!L.Util.isArray(value)) {
        params.push(key + '=' + encodeURIComponent(value));
      } else {
        for (var j = 0; j < value.length; j++) {
          params.push(key + '=' + encodeURIComponent(value[j]));
        }
      }
    }
    return (!existingUrl || existingUrl.indexOf('?') === -1 ? '?' : '&') + params.join('&');
  }

  var ArcGis = L.Class.extend({
    options: {
      service_url: 'https://geocode.arcgis.com/arcgis/rest/services/World/GeocodeServer'
    },

    initialize: function (accessToken, options) {
      L.setOptions(this, options);
      this._accessToken = accessToken;
    },

    geocode: function (query, cb, context) {
      var params = {
        SingleLine: query,
        outFields: 'Addr_Type',
        forStorage: false,
        maxLocations: 10,
        f: 'json'
      };

      if (this._key && this._key.length) {
        params.token = this._key;
      }

      getJSON(
        this.options.service_url + '/findAddressCandidates',
        L.extend(params, this.options.geocodingQueryParams),
        function (data) {
          var results = [],
            loc,
            latLng,
            latLngBounds;

          if (data.candidates && data.candidates.length) {
            for (var i = 0; i <= data.candidates.length - 1; i++) {
              loc = data.candidates[i];
              latLng = L.latLng(loc.location.y, loc.location.x);
              latLngBounds = L.latLngBounds(
                L.latLng(loc.extent.ymax, loc.extent.xmax),
                L.latLng(loc.extent.ymin, loc.extent.xmin)
              );
              results[i] = {
                name: loc.address,
                bbox: latLngBounds,
                center: latLng
              };
            }
          }

          cb.call(context, results);
        }
      );
    },

    suggest: function (query, cb, context) {
      return this.geocode(query, cb, context);
    },

    reverse: function (location, scale, cb, context) {
      var params = {
        location: encodeURIComponent(location.lng) + ',' + encodeURIComponent(location.lat),
        distance: 100,
        f: 'json'
      };

      getJSON(this.options.service_url + '/reverseGeocode', params, function (data) {
        var result = [],
          loc;

        if (data && !data.error) {
          loc = L.latLng(data.location.y, data.location.x);
          result.push({
            name: data.address.Match_addr,
            center: loc,
            bounds: L.latLngBounds(loc, loc)
          });
        }

        cb.call(context, result);
      });
    }