pipes.lua: wire up pump intake ABM and add pumps to balancing logic

pipes.lua

@@ -239,10 +239,19 @@ else
 
 
 -- run pressure balancing ABM over all water-moving nodes
+-- FIXME: DRY principle, get this from elsewhere in the code
+local pump_on = "pipeworks:pump_on"
+local pump_off = "pipeworks:pump_off"
+
 local pipes_all_nodenames = pipes_full_nodenames
 for _, pipe in ipairs(pipes_empty_nodenames) do
 	table.insert(pipes_all_nodenames, pipe)
 end
+table.insert(pipes_all_nodenames, pump_off)
+table.insert(pipes_all_nodenames, pump_on)
+
+
+
 minetest.register_abm({
 	nodenames = pipes_all_nodenames,
 	interval = 1,
@@ -252,6 +261,16 @@ minetest.register_abm({
 	end
 })
 
+-- absorb water into pumps if it'll fit
+minetest.register_abm({
+	nodenames = { pump_on },
+	interval = 1,
+	chance = 1,
+	action = function(pos, node, active_object_count, active_object_count_wider)
+		pipeworks.run_pump_intake(pos, node)
+	end
+})
 
 
-end
+
+end