SearchController.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web.Mvc;
using Orchard.ContentManagement;
using Orchard.Indexing;

namespace Attendees.Controllers
{
    public class SearchController : Controller
    {
        private readonly IIndexProvider _indexProvider;
        private readonly IContentManager _contentManager;

        public SearchController(IIndexProvider indexProvider, IContentManager contentManager) {
            _indexProvider = indexProvider;
            _contentManager = contentManager;
        }

        // GET: Attendees
        public ActionResult Index(string q, string gender, string order, double? longitude, double? latitude, double? radius = 1) {
            var searchBuilder = _indexProvider.CreateSearchBuilder("Attendees");

            if(!String.IsNullOrWhiteSpace(q)) {
                searchBuilder = searchBuilder.Parse(new[] { "title", "attendee-jobtitle", "attendee-city" }, q, escape: true);
            }

            if(!String.IsNullOrWhiteSpace(gender)) {
                searchBuilder = searchBuilder.WithField("attendee-gender", gender).AsFilter();
            }

            if (longitude.HasValue && latitude.HasValue) {
                searchBuilder = searchBuilder.WithinRange("attendee-longitude", longitude - radius, longitude + radius).Mandatory();
                searchBuilder = searchBuilder.WithinRange("attendee-latitude", latitude - radius, latitude + radius).Mandatory();
            }

            if (String.Equals(order, "created", StringComparison.OrdinalIgnoreCase)) {
                searchBuilder = searchBuilder.SortByDateTime("created").Ascending();
            }

            var contentItemIds = searchBuilder.Search().Select(x => x.ContentItemId);
            var contentItems = _contentManager
                .GetMany<IContent>(contentItemIds, VersionOptions.Published, QueryHints.Empty)
                .Cast<dynamic>();

            var results = contentItems
                .Select(x => 
                    new {
                        Title = x.TitlePart.Title,
                        JobTitle = x.Attendee.JobTitle.Value,
                        Gender = x.Attendee.Gender.Value,
                        City = x.Attendee.City.Value,
                        Country = ((IEnumerable<dynamic>)x.Attendee.Country.Terms).Select(t => new { Id = t.Id, Name = t.Name }).FirstOrDefault(),
                        Longitude = x.Attendee.Longitude.Value,
                        Latitude = x.Attendee.Latitude.Value,
                        RegisteredUtc = x.CommonPart.CreatedUtc,
                    });

            // Creates facet
            var resultFacets = searchBuilder.GetBits();

            // The generic facets can be cached
            var maleFacets = _indexProvider.CreateSearchBuilder("Attendees").WithField("attendee-gender", "Male").Mandatory().ExactMatch().GetBits();
            var femaleFacets = _indexProvider.CreateSearchBuilder("Attendees").WithField("attendee-gender", "Female").Mandatory().ExactMatch().GetBits();

            return Json(
                new {
                    count = resultFacets.Count(),
                    male = resultFacets.And(maleFacets).Count(),
                    female = resultFacets.And(femaleFacets).Count(),
                    results,
                }, 
                "application/json", 
                JsonRequestBehavior.AllowGet
            );
        }
    }
}