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path: root/advtrains/advtrains_luaautomation/active_common.lua
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local ac = {nodes={}}

function ac.load(data)
	ac.nodes=data and data.nodes or {}
end
function ac.save()
	return {nodes = ac.nodes}
end

function ac.after_place_node(pos, player)
	advtrains.ndb.update(pos)
	local meta=minetest.get_meta(pos)
	meta:set_string("formspec", ac.getform(pos, meta))
	meta:set_string("infotext", "LuaAutomation component, unconfigured.")
	local ph=minetest.hash_node_position(pos)
	--just get first available key!
	for en,_ in pairs(atlatc.envs) do
		ac.nodes[ph]={env=en}
		return
	end
end
function ac.getform(pos, meta_p)
	local meta = meta_p or minetest.get_meta(pos)
	local envs_asvalues={}
	
	local ph=minetest.hash_node_position(pos)
	local nodetbl = ac.nodes[ph]
	local env, code, err = nil, "", ""
	if nodetbl then
		code=nodetbl.code or ""
		err=nodetbl.err or ""
		env=nodetbl.env or ""
	end
	local sel = 1
	for n,_ in pairs(atlatc.envs) do
		envs_asvalues[#envs_asvalues+1]=n
		if n==env then
			sel=#envs_asvalues
		end
	end
	local form = "size[10,10]dropdown[0,0;3;env;"..table.concat(envs_asvalues, ",")..";"..sel.."]"
		.."button[4,0;2,1;save;Save]button[7,0;2,1;cle;Clear local env] textarea[0.2,1;10,10;code;Code;"..minetest.formspec_escape(code).."]"
		.."label[0,9.8;"..err.."]"
	return form
end

function ac.after_dig_node(pos, node, player)
	advtrains.invalidate_all_paths()
	advtrains.ndb.clear(pos)
	local ph=minetest.hash_node_position(pos)
	ac.nodes[ph]=nil
end

function ac.on_receive_fields(pos, formname, fields, player)
	if not minetest.check_player_privs(player:get_player_name(), {atlatc=true}) then
		minetest.chat_send_player(player:get_player_name(), "Missing privilege: atlatc - Operation cancelled!")
	end
	
	local meta=minetest.get_meta(pos)
	local ph=minetest.hash_node_position(pos)
	local nodetbl = ac.nodes[ph] or {}
	--if fields.quit then return end
	if fields.env then
		nodetbl.env=fields.env
	end
	if fields.code then
		nodetbl.code=fields.code
	end
	if fields.save then
		nodetbl.err=nil
	end
	if fields.cle then
		nodetbl.data={}
	end
	meta:set_string("formspec", ac.getform(pos, meta))
	
	ac.nodes[ph]=nodetbl
	if nodetbl.env then
		meta:set_string("infotext", "LuaAutomation component, assigned to environment '"..nodetbl.env.."'")
	else
		meta:set_string("infotext", "LuaAutomation component, invalid enviroment set!")
	end
end

function ac.run_in_env(pos, evtdata, customfct_p)
	local ph=minetest.hash_node_position(pos)
	local nodetbl = ac.nodes[ph] or {}
	
	local meta
	if minetest.get_node(pos) then
		meta=minetest.get_meta(pos)
	end
	
	if not nodetbl.env or not atlatc.envs[nodetbl.env] then
		return false, "Not an existing environment: "..(nodetbl.env or "<nil>")
	end
	if not nodetbl.code or nodetbl.code=="" then
		return false, "No code to run!"
	end
	
	local customfct=customfct_p or {}
	customfct.interrupt=function(t, imesg)
		atlatc.interrupt.add(t, pos, {type="int", int=true, message=imesg})
	end
	
	local datain=nodetbl.data or {}
	local succ, dataout = atlatc.envs[nodetbl.env]:execute_code(datain, nodetbl.code, evtdata, customfct)
	if succ then
		atlatc.active.nodes[ph].data=atlatc.remove_invalid_data(dataout)
	else
		atlatc.active.nodes[ph].err=dataout
		if meta then
			meta:set_string("infotext", "LuaAutomation ATC interface rail, ERROR:"..dataout)
		end
	end
	if meta then
		meta:set_string("formspec", ac.getform(pos, meta))
	end
end

atlatc.active=ac