Lucene.Net ultra fast search for MVC or WebForms site => made easy!

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web.Mvc;
using LuceneSearch.Data;
using LuceneSearch.Service;
using LuceneSearch.Model;
using MvcLuceneSampleApp.ViewModels;

namespace MvcLuceneSampleApp.Controllers {
	public class HomeController : Controller {
		public ActionResult Index
      (string searchTerm, string searchField, bool? searchDefault, int? limit) {
			// create default Lucene search index directory
			if (!Directory.Exists(GoLucene._luceneDir)) Directory.CreateDirectory(GoLucene._luceneDir);

			// perform Lucene search
		  List<SampleData> _searchResults;
      if (searchDefault == true)
        _searchResults = (string.IsNullOrEmpty(searchField)
                           ? GoLucene.SearchDefault(searchTerm)
                           : GoLucene.SearchDefault(searchTerm, searchField)).ToList();
      else
        _searchResults = (string.IsNullOrEmpty(searchField)
                           ? GoLucene.Search(searchTerm)
                           : GoLucene.Search(searchTerm, searchField)).ToList();
      if (string.IsNullOrEmpty(searchTerm) && !_searchResults.Any())
        _searchResults = GoLucene.GetAllIndexRecords().ToList();
      

			// setup and return view model
			var search_field_list = new
				List<SelectedList> {
				                     	new SelectedList {Text = "(All Fields)", Value = ""},
				                     	new SelectedList {Text = "Id", Value = "Id"},
				                     	new SelectedList {Text = "Name", Value = "Name"},
				                     	new SelectedList {Text = "Description", Value = "Description"}
				                     };

      // limit display number of database records
		  var limitDb = limit == null ? 3 : Convert.ToInt32(limit);
		  List<SampleData> allSampleData;
		  if (limitDb > 0) {
		    allSampleData = SampleDataRepository.GetAll().ToList().Take(limitDb).ToList();
        ViewBag.Limit = SampleDataRepository.GetAll().Count - limitDb;
		  }
		  else allSampleData = SampleDataRepository.GetAll();

		  return View(new IndexViewModel {
			                               	AllSampleData = allSampleData,
			                               	SearchIndexData = _searchResults,
			                               	SampleData = new SampleData {Id = 9, Name = "El-Paso", Description = "City in Texas"},
			                               	SearchFieldList = search_field_list,
			                               });
		}

		public ActionResult Search(string searchTerm, string searchField, string searchDefault) {
			return RedirectToAction("Index", new {searchTerm, searchField, searchDefault});
		}

		public ActionResult CreateIndex() {
			GoLucene.AddUpdateLuceneIndex(SampleDataRepository.GetAll());
			TempData["Result"] = "Search index was created successfully!";
			return RedirectToAction("Index");
		}

		[HttpPost]
		public ActionResult AddToIndex(SampleData sampleData) {
			GoLucene.AddUpdateLuceneIndex(sampleData);
			TempData["Result"] = "Record was added to search index successfully!";
			return RedirectToAction("Index");
		}

		public ActionResult ClearIndex() {
			if (GoLucene.ClearLuceneIndex())
				TempData["Result"] = "Search index was cleared successfully!";
			else
				TempData["ResultFail"] = "Index is locked and cannot be cleared, try again later or clear manually!";
			return RedirectToAction("Index");
		}

		public ActionResult ClearIndexRecord(int id) {
			GoLucene.ClearLuceneIndexRecord(id);
			TempData["Result"] = "Search index record was deleted successfully!";
			return RedirectToAction("Index");
		}

		public ActionResult OptimizeIndex() {
			GoLucene.Optimize();
			TempData["Result"] = "Search index was optimized successfully!";
			return RedirectToAction("Index");
		}

	}
}