begin to make battery box send information via digilines

technic/machines/HV/battery_box.lua

@@ -1,4 +1,5 @@
 -- HV battery box
+
 minetest.register_craft({
 	output = 'technic:hv_battery_box0',
 	recipe = {

technic/machines/LV/battery_box.lua

@@ -1,3 +1,4 @@
+-- LV Battery box
 
 minetest.register_craft({
 	output = 'technic:lv_battery_box0',

technic/machines/register/battery_box.lua

@@ -62,7 +62,7 @@ function technic.register_battery_box(data)
 	local ltier = string.lower(tier)
 
 	local formspec =
-		"invsize[8,9;]"..
+		"size[8,9]"..
 		"image[1,1;1,2;technic_power_meter_bg.png]"..
 		"list[current_name;src;3,1;1,1;]"..
 		"image[4,1;1,1;technic_battery_reload.png]"..
@@ -76,6 +76,10 @@ function technic.register_battery_box(data)
 		"listring[current_player;main]"..
 		"listring[current_name;src]"..
 		"listring[current_player;main]"
+	if digilines then
+		formspec = formspec..
+			"field[0.28,4.1;3.2,1;channel;Digiline Channel;${channel}]"
+	end
 
 	if data.upgrade then
 		formspec = formspec..
@@ -191,6 +195,7 @@ function technic.register_battery_box(data)
 
 				meta:set_string("infotext", S("%s Battery Box"):format(tier))
 				meta:set_string("formspec", formspec)
+				meta:set_string("channel", tier.."_battery_box"..minetest.pos_to_string(pos))
 				meta:set_int(tier.."_EU_demand", 0)
 				meta:set_int(tier.."_EU_supply", 0)
 				meta:set_int(tier.."_EU_input",  0)
@@ -206,7 +211,43 @@ function technic.register_battery_box(data)
 			allow_metadata_inventory_move = technic.machine_inventory_move,
 			technic_run = run,
 			after_place_node = data.tube and pipeworks.after_place,
-			after_dig_node = technic.machine_after_dig_node
+			after_dig_node = technic.machine_after_dig_node,
+			on_receive_fields = function(pos, formname, fields, sender)
+				if not fields.channel then
+					return
+				end
+				local plname = sender:get_player_name()
+				if minetest.is_protected(pos, plname) then
+					minetest.record_protection_violation(pos, plname)
+					return
+				end
+				local meta = minetest.get_meta(pos)
+				meta:set_string("channel", fields.channel)
+			end,
+			mesecons = {effector = {
+				rules = mesecon.rules.default,
+			}},
+			digiline = {
+				receptor = {action = function() end},
+				effector = {
+					action = function(pos, node, channel, msg)
+						if msg ~= "GET" and msg ~= "get" then
+							return
+						end
+						local meta = minetest.get_meta(pos)
+						if channel ~= meta:get_string("channel") then
+							return
+						end
+						digilines.receptor_send(pos, digilines.rules.default, channel, {
+							demand = meta:get_int(tier.."_EU_demand"),
+							supply = meta:get_int(tier.."_EU_supply"),
+							input  = meta:get_int(tier.."_EU_input"),
+							charge = meta:get_int("internal_EU_charge")
+							-- todo: tool and its charge...; maxcharge?
+						})
+					end
+				},
+			},
 		})
 	end