1 files changed, 75 insertions, 0 deletions
diff --git a/advtrains_interlocking/signal_api.lua b/advtrains_interlocking/signal_api.lua
new file mode 100644
index 0000000..e072273
--- /dev/null
+++ b/advtrains_interlocking/signal_api.lua
@@ -0,0 +1,75 @@
+-- Signal API implementation
+
+
+--[[ Signal aspect table:
+asp = {
+	main = {
+		free = <boolean>,
+		speed = <int km/h>,
+	},
+	shunt = {
+		free = <boolean>,
+	}
+	dst = {
+		free = <boolean>,
+		speed = <int km/h>,
+	}
+	info = {
+		call_on = <boolean>, -- Call-on route, expect train in track ahead
+		dead_end = <boolean>, -- Route ends on a dead end (e.g. bumper)
+	}
+}
+Signals API:
+groups = {
+	advtrains_signal = 1,
+	save_in_at_nodedb = 1,
+}
+advtrains = {
+	function set_aspect(pos, node, asp)
+		...
+	end
+}
+on_rightclick = advtrains.interlocking.signal_rc_handler
+
+]]--
+
+function advtrains.interlocking.signal_set_aspect(pos, asp)
+	local node=advtrains.ndb.get_node(pos)
+	local ndef=minetest.registered_nodes[node.name]
+	if ndef and ndef.advtrains and ndef.advtrains.set_aspect then
+		ndef.advtrains.set_aspect(pos, node, asp)
+	end
+end
+
+function advtrains.interlocking.signal_rc_handler(pos, node, player, itemstack, pointed_thing)
+	local pname = player:get_player_name()
+	minetest.show_formspec(pname, "at_il_sigasp_"..minetest.pos_to_string(pos), "field[aspect;Set Aspect (F/D)Speed(F/D)Speed(F/D);D0D0D]")
+end
+
+minetest.register_on_player_receive_fields(function(player, formname, fields)
+	local pname = player:get_player_name()
+	local pts = string.match(formname, "^at_il_sigasp_(.+)$")
+	local pos
+	if pts then pos = minetest.string_to_pos(pts) end
+	if pos and fields.aspect then
+		local mfs, msps, dfs, dsps, shs = string.match(fields.aspect, "^([FD])([0-9]+)([FD])([0-9]+)([FD])$")
+		local asp = {
+			main = {
+				free = mfs=="F",
+				speed = tonumber(msps),
+			},
+			shunt = {
+				free = shs=="F",
+			},
+			dst = {
+				free = dfs=="F",
+				speed = tonumber(dsps),
+			},
+			info = {
+				call_on = false, -- Call-on route, expect train in track ahead
+				dead_end = false, -- Route ends on a dead end (e.g. bumper)
+			}
+		}
+		advtrains.interlocking.signal_set_aspect(pos, asp)
+	end
+end)