esri-leaflet-geocoder/src/Tasks/Suggest.js

Esri Geocoding utility and search plugin for Leaflet.

import {
  latLng,
  latLngBounds
} from 'leaflet';
import { Task, Util as EsriUtil } from 'esri-leaflet';
import { WorldGeocodingServiceUrl } from '../helper';

export var Suggest = Task.extend({
  path: 'suggest',

  params: {},

  setters: {
    text: 'text',
    category: 'category',
    countries: 'countryCode',
    maxSuggestions: 'maxSuggestions'
  },

  initialize: function (options) {
    options = options || {};
    if (!options.url) {
      options.url = WorldGeocodingServiceUrl;
      options.supportsSuggest = true;
    }
    Task.prototype.initialize.call(this, options);
  },

  within: function (bounds) {
    bounds = latLngBounds(bounds);
    var center = bounds.getCenter();
    var ne = bounds.getNorthWest();
    this.params.location = center.lng + ',' + center.lat;
    this.params.distance = Math.min(Math.max(center.distanceTo(ne), 2000), 50000);
    this.params.searchExtent = EsriUtil.boundsToExtent(bounds);
    return this;
  },

  nearby: function (coords, radius) {
    var centroid = latLng(coords);
    this.params.location = centroid.lng + ',' + centroid.lat;
    if (radius) {
      this.params.distance = Math.min(Math.max(radius, 2000), 50000);
    }
    return this;
  },

  run: function (callback, context) {
    if (this.options.supportsSuggest) {
      return this.request(function (error, response) {
        callback.call(context, error, response, response);
      }, this);
    } else {
      console.warn('this geocoding service does not support asking for suggestions');
    }
  }

});

export function suggest (options) {
  return new Suggest(options);
}

export default suggest;