source/app/controllers/search_controller.rb

require_dependency "search_system"

#--######################################################################
# Copyright (c) 2006 LogicaCMG
# 
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Eclipse Public License v1.0
# which accompanies this distribution, and is available at
# http://www.eclipse.org/legal/epl-v10.html
#
# Contributors:
# 
# Onno van der Straaten:: initial implementation
#++######################################################################
# {Copyright (c) 2006 LogicaCMG}[link:files/COPYRIGHT.html]

class SearchController < ApplicationController
  layout 'application' , :except => [:rss, :description]
  
  def index 
    search
  end
  
  #-----------------------------------------------------------------------
  # search through the index, get the ActiveRecord's that match and
  # return those to the caller
  #-----------------------------------------------------------------------
  def search
    @search_config = YAML.load(File.open(File.join(RAILS_ROOT,'config','search.yml')))
    
    if @params['search_terms'].nil? then
      @search_terms = @search_config['default_search_terms']
    else 
      @search_terms = @params['search_terms'].split
    end
    
    @count        = @params['count'].to_i || -1
    
    self.send("#{@search_config['search_backend']}_search")
    render :action => 'index'
  end
  
  def simple_search
    
    empty_contents = MockContents.new
    
    index_filename = File.join(RAILS_ROOT,@search_config['simple_backend']['index_filename'])
    
    if not File.exists?(index_filename) then
      raise "content index file (#{File.expand_path(index_filename)}) does not exist.  Did you run scripts/indexer ?"
    end
    
    simple_index = Search::Simple::Searcher.load(empty_contents,index_filename)
    
    # what to return to the caller
    @results = Array.new
    
    search_results = simple_index.find_words(@search_terms)
    if search_results.contains_matches && search_results.warnings.empty? then 
      #if search_results.contains_matches then
      search_results.results.sort.each do |result|
       (classname,pk_id,column) = result.name.split(".")
        classvar = eval(classname)
        @results << classvar.find(pk_id)
        break if @count > 0 and @results.size >= @count 
      end
    end
    
    @results.uniq!
    @pages = Array.new
    @comments = Array.new
    @wikis = Array.new
    @results.each do |result|
      if  result.class.to_s == 'Page'
        @pages << result
        @wikis = @wikis | result.sites
      elsif   result.class.to_s  == 'Comment'
        @comments << result
      end
    end
    @wikis = @wikis & Site.find_wikis
  end
  
  
  def description
    @headers["Content-Type"] = "text/xml"
    render 'opensearch/description'
  end
  def rss
    @headers["Content-Type"] = "text/xml"
    search
    render 'opensearch/rss'
  end
end