From 285f29ddde06c431dd8cb1602009b5b8d6f1d65d Mon Sep 17 00:00:00 2001
From: rubenwardy <rubenwardy@gmail.com>
Date: Sat, 28 Nov 2015 01:32:41 +0000
Subject: [PATCH] Stop players from digging past the barrier

---
 mods/ctf_barrier/init.lua | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/mods/ctf_barrier/init.lua b/mods/ctf_barrier/init.lua
index 4132f88..0438782 100644
--- a/mods/ctf_barrier/init.lua
+++ b/mods/ctf_barrier/init.lua
@@ -187,3 +187,19 @@ end)
 		minetest.set_node(pos, {name = "air"})
 	end
 })]]
+
+local old_is_protected = minetest.is_protected
+function minetest.is_protected(pos, name)
+	if ctf_match.build_timer <= 0 then
+		return old_is_protected(pos, name)
+	end
+
+	local tname, distsq = ctf_flag.get_nearest(pos)
+	local tname = ctf.player(name).team
+	if tname and (tname == "blue" and pos.z >= 0) or (tname == "red" and pos.z <= 0) then
+		minetest.chat_send_player(name, "Can't dig beyond the barrier!")
+		return true
+	else
+		return old_is_protected(pos, name)
+	end
+end