--[[
    signs mod for Minetest - Various signs with text displayed on
    (c) Pierre-Yves Rollo

    This file is part of signs.

    signs 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 3 of the License, or
    (at your option) any later version.

    signs 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 signs.  If not, see <http://www.gnu.org/licenses/>.
--]]

-- Wallmounted to facedir conversion
local wallmounted_to_facedir = {
  [0]=1, -- Should not happend with signs 
  [1]=1, -- Should not happend with signs
  [2]=1,
  [3]=3,
  [4]=0,
  [5]=2
}

-- Nodes conversions
local convert_nodes = {
  ['signs_road:blue_street']  = 'signs_road:blue_street_sign',
  ['signs_road:green_street'] = 'signs_road:green_street_sign',
  ['signs_road:black_right']  = 'signs_road:black_right_sign',
  ['signs_road:black_left']   = 'signs_road:black_left_sign',
  ['signs_road:green_right']  = 'signs_road:green_right_sign',
  ['signs_road:green_left']   = 'signs_road:green_left_sign'
}

local function compatibility_check(pos, node)
    -- Old wallmounted modes to new facedir nodes conversion
    node.name = convert_nodes[node.name]
    if node.name then
	  node.param2 = wallmounted_to_facedir[node.param2]
      display_lib.on_destruct(pos)
      minetest.swap_node(pos, node)
      display_lib.on_construct(pos)
    end
end

minetest.register_lbm({ name = "signs_road:conpatibility_1",
	nodenames = {'signs_road:blue_street', 'signs_road:green_street', 'signs_road:black_right',
                 'signs_road:black_left', 'signs_road:green_right', 'signs_road:green_left'},
	action = compatibility_check,
})