add mobs item pickup

mods/ENTITIES/mcl_mobs/api.lua

@@ -2935,6 +2935,20 @@ function mobs:gopath(self,target,callback_arrived)
 	end
 end
 
+local function check_item_pickup(self)
+	if self.pick_up and #self.pick_up > 0 then
+		for _,o in pairs(minetest.get_objects_inside_radius(self.object:get_pos(),2)) do
+			local l=o:get_luaentity()
+			if l and l.name == "__builtin:item" then
+				for k,v in pairs(self.pick_up) do
+					if self.on_pick_up and l.itemstring:find(v) then
+						if self.on_pick_up(self,l) == nil then o:remove() end
+					end
+				end
+			end
+		end
+	end
+end
 
 -- falling and fall damage
 -- returns true if mob died
@@ -3536,7 +3550,7 @@ end
 
 -- main mob function
 local mob_step = function(self, dtime)
-
+	check_item_pickup(self)
 	if not self.fire_resistant then
 		mcl_burning.tick(self.object, dtime, self)
 	end
@@ -3964,7 +3978,8 @@ minetest.register_entity(name, {
 	child = def.child or false,
 	texture_mods = {},
 	shoot_arrow = def.shoot_arrow,
-        sounds_child = def.sounds_child,
+    sounds_child = def.sounds_child,
+    pick_up = def.pick_up,
 	explosion_strength = def.explosion_strength,
 	suffocation_timer = 0,
 	follow_velocity = def.follow_velocity or 2.4,
@@ -3988,6 +4003,8 @@ minetest.register_entity(name, {
 
 	on_grown = def.on_grown,
 
+	on_pick_up = def.on_pick_up,
+
 	on_detach_child = mob_detach_child,
 
 	on_activate = function(self, staticdata, dtime)

mods/ENTITIES/mobs_mc/villager.lua

@@ -1239,6 +1239,10 @@ mobs:register_mob("mobs_mc:villager", {
 	_id = nil,
 	_profession = "unemployed",
 	look_at_player = true,
+	pick_up = {"mcl_farming:bread"},
+	on_pick_up = function(self,itementity)
+		minetest.log("picked up "..itementity.itemstring)
+	end,
 	on_rightclick = function(self, clicker)
 		local trg=vector.new(0,9,0)
 		if self._jobsite then