#-- encoding: UTF-8
#-- copyright
# OpenProject is a project management system.
# Copyright (C) 2012-2015 the OpenProject Foundation (OPF)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2013 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# 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.
#
# See doc/COPYRIGHT.rdoc for more details.
#++

module QueriesHelper
  def operators_for_select(filter_type)
    Queries::Filter.operators_by_filter_type[filter_type].map { |o| [l(Queries::Filter.operators[o]), o] }
  end

  def column_locale(column)
    (column.is_a? QueryCustomFieldColumn) ? column.custom_field.name_locale : nil
  end

  def add_filter_from_params
    @query.filters = []
    @query.add_filters(params[:fields] || params[:f], params[:operators] || params[:op], params[:values] || params[:v])
  end

  # Retrieve query from session or build a new query
  def retrieve_query
    if !params[:query_id].blank?
      cond = 'project_id IS NULL'
      cond << " OR project_id = #{@project.id}" if @project
      @query = Query.where(cond).find(params[:query_id])
      @query.project = @project
      add_filter_from_params if params[:accept_empty_query_fields]
      session[:query] = { id: @query.id, project_id: @query.project_id }
      sort_clear
    else
      if api_request? || params[:set_filter] || session[:query].nil? || session[:query][:project_id] != (@project ? @project.id : nil)
        # Give it a name, required to be valid
        @query = Query.new(name: '_')
        @query.project = @project
        if params[:fields] || params[:f]
          add_filter_from_params
        else
          @query.available_work_package_filters.keys.each do |field|
            @query.add_short_filter(field, params[field]) if params[field]
          end
        end
        @query.group_by = params[:group_by]
        @query.display_sums = params[:display_sums].present? && params[:display_sums] == 'true'
        @query.column_names = params[:c] || (params[:query] && params[:query][:column_names])
        session[:query] = { project_id: @query.project_id, filters: @query.filters, group_by: @query.group_by, display_sums: @query.display_sums, column_names: @query.column_names }
      else
        @query = Query.find_by(id: session[:query][:id]) if session[:query][:id]
        @query ||= Query.new(name: '_', project: @project, filters: session[:query][:filters], group_by: session[:query][:group_by], display_sums: session[:query][:display_sums], column_names: session[:query][:column_names])
        @query.project = @project
      end
    end

    @query
  end

  def visible_queries
    unless @visible_queries
      # User can see public queries and his own queries
      visible = ARCondition.new(['is_public = ? OR user_id = ?', true, (User.current.logged? ? User.current.id : 0)])
      # Project specific queries and global queries
      visible << (@project.nil? ? ['project_id IS NULL'] : ['project_id = ?', @project.id])
      @visible_queries = Query.where(visible.conditions)
                         .order('name ASC')
                         .select(:id, :name, :is_public, :project_id)
    end
    @visible_queries
  end
end