#--
# Copyright (c) 2010-2011 Peter Horn, Provideal GmbH
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#++

# These are extensions for use from ActionController instances
module Tabulatr::Finder

  require File.join(File.dirname(__FILE__), 'finder', 'find_for_active_record_table')
  require File.join(File.dirname(__FILE__), 'finder', 'find_for_mongoid_table')

  # compress the list of ids as good as I could imagine ;)
  # uses fancy base twisting
  def self.compress_id_list(list)
    IdStuffer.stuff(list)
  end

  # inverse of compress_id_list
  def self.uncompress_id_list(str)
    IdStuffer.unstuff(str).map &:to_s
  end

  class Invoker
    def initialize(batch_action, ids)
      @batch_action = batch_action.to_sym
      @ids = ids
    end

    def method_missing(name, *args, &block)
      if @batch_action == name
        yield(@ids, args)
      end
    end
  end

private

  def self.class_to_param(klaz)
    klaz.to_s.downcase.gsub("/","_")
  end

  def self.condition_from(n,v,c)
    raise "SECURITY violation, field name is '#{n}'" unless /^[\d\w]+(\.[\d\w]+)?$/.match n
    @like ||= Tabulatr.sql_options[:like]
    nc = c
    if v.is_a?(String)
      if v.present?
        nc = [c[0] << " AND (#{n} = ?) ", c[1] << v]
      end
    elsif v.is_a?(Hash)
      if v[:like]
        if v[:like].present?
          nc = [c[0] << " AND (#{n} #{@like} ?) ", c[1] << "%#{v[:like]}%"]
        end
      else
        nc = [c[0] << " AND (#{n} >= ?) ", c[1] << "#{v[:from]}"] if v[:from].present?
        nc = [nc[0] << " AND (#{n} <= ?) ", nc[1] << "#{v[:to]}"] if v[:to].present?
      end
    else
      raise "Wrong filter type: #{v.class}"
    end
    nc
  end
end