Move arrow-node logic out of mcl_bows/arrow.lua and into the node definitions under _vl_projectile.on_collide

mods/ITEMS/REDSTONE/mcl_target/init.lua

@@ -27,6 +27,11 @@ minetest.register_node("mcl_target:target_off", {
 			rules = mesecon.rules.alldirs,
 		},
 	},
+	_vl_projectile = {
+		on_collide = function(projectile, pos, node, node_def)
+			mcl_target.hit(pos, 1) --10 redstone ticks
+		end
+	},
 	_mcl_blast_resistance = 0.5,
 	_mcl_hardness = 0.5,
 })
@@ -67,4 +72,4 @@ if mod_farming then
 			{"",                  "mesecons:redstone",     ""},
 		},
 	})
-end
+end

mods/ITEMS/REDSTONE/mesecons_button/init.lua

@@ -151,6 +151,20 @@ function mesecon.register_button(basename, description, texture, recipeitem, sou
 		}},
 		_mcl_button_basename = basename,
 		_mcl_button_timer = button_timer,
+		_vl_projectile = {
+			on_collide = function(projectile, pos, node, node_def)
+				pos = vector.round(pos)
+
+				-- Push the button! Push, push, push the button!
+				if node_def.groups.button_push_by_arrow == 1 then
+					minetest.log("hit"..dump({
+						pos = pos,
+						node = node,
+					}))
+					mesecon.push_button(pos, node)
+				end
+			end
+		},
 
 		_mcl_blast_resistance = 0.5,
 		_mcl_hardness = 0.5,

mods/ITEMS/mcl_bows/arrow.lua

@@ -198,28 +198,11 @@ local arrow_entity = {
 
 			minetest.sound_play({name="mcl_bows_hit_other", gain=0.3}, {pos=self.object:get_pos(), max_hear_distance=16}, true)
 
-			if mcl_burning.is_burning(self.object) and snode.name == "mcl_tnt:tnt" then
-				tnt.ignite(self._stuckin)
-			end
-
-			-- Ignite Campfires
-			if mod_campfire and mcl_burning.is_burning(self.object) and minetest.get_item_group(snode.name, "campfire") ~= 0 then
-				mcl_campfires.light_campfire(self._stuckin)
-			end
-
-			-- Activate target
-			if mod_target and snode.name == "mcl_target:target_off" then
-				mcl_target.hit(self._stuckin, 1) --10 redstone ticks
-			end
-
-			-- Push the button! Push, push, push the button!
-			if mod_button and minetest.get_item_group(node.name, "button") > 0 and minetest.get_item_group(node.name, "button_push_by_arrow") == 1 then
-				local bdir = minetest.wallmounted_to_dir(node.param2)
-				-- Check the button orientation
-				if vector.equals(vector.add(dpos, bdir), self._stuckin) then
-					mesecon.push_button(dpos, node)
-				end
-			end
+			-- Temporary handler here to test moving this to node definitions.
+			-- TODO: move to vl_projectile when the stuck logic gets moved there and before merging
+			-- Trigger hits on the node the projectile hit
+			local hook = sdef._vl_projectile and sdef._vl_projectile.on_collide
+			if hook then hook(self, self._stuckin, snode, sdef) end
 		end,
 		on_collide_with_entity = function(self, pos, obj)
 			local is_player = obj:is_player()

mods/ITEMS/mcl_campfires/api.lua

@@ -261,6 +261,14 @@ function mcl_campfires.register_campfire(name, def)
 		},
 		_mcl_blast_resistance = 2,
 		_mcl_hardness = 2,
+		_vl_projectile = {
+			on_collide = function(projectile, pos, node, node_def)
+				-- Ignite Campfires
+				if mcl_burning.is_burning(projectile) then
+					mcl_campfires.light_campfire(pos)
+				end
+			end
+		},
 		after_dig_node = function(pos, node, oldmeta, digger)
 			campfire_drops(pos, digger, def.drops, name.."_lit")
 		end,

mods/ITEMS/mcl_tnt/init.lua

@@ -110,6 +110,13 @@ minetest.register_node("mcl_tnt:tnt", {
 			tnt.ignite(droppos)
 		end
 	end,
+	_vl_projectile = {
+		on_collide = function(projectile, pos, node, node_def)
+			if mcl_burning.is_burning(projectile) then
+				tnt.ignite(pos)
+			end
+		end
+	},
 	sounds = sounds,
 })