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# redMine - project management software

# Copyright (C) 2006  Jean-Philippe Lang

#

# This program is free software; you can redistribute it and/or

# modify it under the terms of the GNU General Public License

# as published by the Free Software Foundation; either version 2

# of the License, or (at your option) any later version.

# 

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

# 

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

class SearchController < ApplicationController

  before_filter :find_optional_project

  helper :messages

  include MessagesHelper

  def index

    @question = params[:q] || ""

    @question.strip!

    @all_words = params[:all_words] || (params[:submit] ? false : true)

    @titles_only = !params[:titles_only].nil?

    projects_to_search =

      case params[:scope]

      when 'all'

        nil

      when 'my_projects'

        User.current.memberships.collect(&:project)

      when 'subprojects'

        @project ? (@project.self_and_descendants.active) : nil

      else

        @project

      end

    offset = nil

    begin; offset = params[:offset].to_time if params[:offset]; rescue; end

    # quick jump to an issue

    if @question.match(/^#?(\d+)$/) && Issue.visible.find_by_id($1.to_i)

      redirect_to :controller => "issues", :action => "show", :id => $1

      return

    end

    @object_types = Redmine::Search.available_search_types.dup

    if projects_to_search.is_a? Project

      # don't search projects

      @object_types.delete('projects')

      # only show what the user is allowed to view

      @object_types = @object_types.select {|o| User.current.allowed_to?("view_#{o}".to_sym, projects_to_search)}

    end

    @scope = @object_types.select {|t| params[t]}

    @scope = @object_types if @scope.empty?

    # extract tokens from the question

    # eg. hello "bye bye" => ["hello", "bye bye"]

    @tokens = @question.scan(%r{((\s|^)"[\s\w]+"(\s|$)|\S+)}).collect {|m| m.first.gsub(%r{(^\s*"\s*|\s*"\s*$)}, '')}

    # tokens must be at least 2 characters long

    @tokens = @tokens.uniq.select {|w| w.length > 1 }

    if !@tokens.empty?

      # no more than 5 tokens to search for

      @tokens.slice! 5..-1 if @tokens.size > 5  

      @results = []

      @results_by_type = Hash.new {|h,k| h[k] = 0}

      limit = 10

      @scope.each do |s|

        r, c = s.singularize.camelcase.constantize.search(@tokens, projects_to_search,

          :all_words => @all_words,

          :titles_only => @titles_only,

          :limit => (limit+1),

          :offset => offset,

          :before => params[:previous].nil?)

        @results += r

        @results_by_type[s] += c

      end

      @results = @results.sort {|a,b| b.event_datetime <=> a.event_datetime}

      if params[:previous].nil?

        @pagination_previous_date = @results[0].event_datetime if offset && @results[0]

        if @results.size > limit

          @pagination_next_date = @results[limit-1].event_datetime 

          @results = @results[0, limit]

        end

      else

        @pagination_next_date = @results[-1].event_datetime if offset && @results[-1]

        if @results.size > limit

          @pagination_previous_date = @results[-(limit)].event_datetime 

          @results = @results[-(limit), limit]

        end

      end

    else

      @question = ""

    end

    render :layout => false if request.xhr?

  end

private  

  def find_optional_project

    return true unless params[:id]

    @project = Project.find(params[:id])

    check_project_privacy

  rescue ActiveRecord::RecordNotFound

    render_404

  end

end