areas/interact.lua

-- Gives a player a warning message about a area being protected
local function printWarning(name, pos)
	local owners = areas:getNodeOwners(pos)
	minetest.chat_send_player(name, ("%s is protected by %s.")
			:format(minetest.pos_to_string(pos), table.concat(owners, ", ")))
end

if minetest.can_interact then
	old_can_interact = minetest.can_interact
	function minetest.can_interact(pos, name)
		if not areas:canInteract(pos, name) then
			return false
		end
		return old_can_interact(pos, name)
	end
end

local old_node_place = minetest.item_place_node
function minetest.item_place_node(itemstack, placer, pointed_thing)
	local pos = pointed_thing.above
	local ndef = minetest.registered_nodes[pointed_thing.under]
	if ndef and ndef.buildable_to then
		pos = pointed_thing.under
	end

	if not areas:canInteract(pos, placer:get_player_name()) then
		printWarning(placer:get_player_name(), pos)
		return itemstack -- Abort place.
	end
	return old_node_place(itemstack, placer, pointed_thing)
end

local old_node_dig = minetest.node_dig
function minetest.node_dig(pos, node, digger)
	if not areas:canInteract(pos, digger:get_player_name()) then
		printWarning(digger:get_player_name(), pos)
		return -- Abort dig.
	end
	return old_node_dig(pos, node, digger)
end