From a70a6b7b774442db5d7aafeac87f2dc4898a1e97 Mon Sep 17 00:00:00 2001
From: sys4-fr <sys4@free.fr>
Date: Sat, 8 Sep 2018 23:57:28 +0200
Subject: [PATCH] Version MFF.

---
 README.md   |  0
 depends.txt |  0
 init.lua    | 50 ++++++++++++++++++++++++++++++++++----------------
 3 files changed, 34 insertions(+), 16 deletions(-)
 mode change 100644 => 100755 README.md
 mode change 100644 => 100755 depends.txt
 mode change 100644 => 100755 init.lua

diff --git a/README.md b/README.md
old mode 100644
new mode 100755
diff --git a/depends.txt b/depends.txt
old mode 100644
new mode 100755
diff --git a/init.lua b/init.lua
old mode 100644
new mode 100755
index bbf914a..36f22b2
--- a/init.lua
+++ b/init.lua
@@ -19,13 +19,7 @@ local waiting_list = {}
 	}
 ]]
 
-minetest.register_globalstep(function(dtime)   
-	count = count + dtime
-	if count < 3 then
-		return
-	end
-	count = 0
-	
+local function tick()
 	for k, v in pairs(waiting_list) do
 		if v.player and v.player:is_player() then
 			local pos = get_surface_pos(v.pos)
@@ -53,19 +47,40 @@ minetest.register_globalstep(function(dtime)
 		local name = player:get_player_name()
 		if not waiting_list[name] then
 			local pos = vector.round(player:getpos())
+
+			-- Sanity check for insane coordinates
+			if pos.x > 31000 or pos.y > 31000 or pos.z > 31000
+				or pos.x < -31000 or pos.y < -31000 or pos.z < -31000 then
+				-- Move to spawn asap
+				-- The server probably set invalid/insane coordinates. We have not saved the previous ones,
+				-- So we need to teleport the player to the spawn to save them from an endless loop of
+				-- Teleportation.
+				local spawn = minetest.string_to_pos(minetest.setting_get("static_spawnpoint") or "0,0,0")
+				minetest.chat_send_player(player:get_player_name(), "An internal error has occured. Your coordinates were corrupted. You are now teleported to the spawn." ..
+					" Please report it to any staff member.")
+				minetest.log("error", "[WorldEdge] Corrupted position detected for player " .. player:get_player_name())
+				player:setpos(spawn)
+			else -- Indent skipped, too many lines to change... We'll wait for "continue" to be introduced in Lua5.2
+
 			local newpos = nil
 			if pos.x >= edge then
 				newpos = {x = -newedge, y = 10, z = pos.z}
 			elseif pos.x <= -edge then
 				newpos = {x = newedge, y = 10, z = pos.z}
 			end
-			 
+
 			if pos.z >= edge then
 				newpos = {x = pos.x, y = 10, z = -newedge}
+				if get_surface_pos(newpos) then
+					newpos.y = get_surface_pos(newpos).y+1 -- /MFF (Mg|19/05//15)
+				end -- /MFF (Mg|14/07/15)
 			elseif pos.z <= -edge then
 				newpos = {x = pos.x, y = 10, z = newedge}
+				if get_surface_pos(newpos) then
+					newpos.y = get_surface_pos(newpos).y+1 -- /MFF (Mg|19/05/15)
+				end -- /MFF (Mg|14/07/15)
 			end
-			
+
 			-- Teleport the player
 			if newpos then
 				minetest.chat_send_player(name, "Please wait a few seconds. We will teleport you soon.")
@@ -78,9 +93,12 @@ minetest.register_globalstep(function(dtime)
 				}
 				obj:setpos(newpos)
 			end
+			end
 		end
 	end
-end)
+	minetest.after(3, tick)
+end
+tick()
 
 function get_surface_pos(pos)
 	local minp = {
@@ -93,19 +111,19 @@ function get_surface_pos(pos)
 		y = 50,
 		z = pos.z + radius - 1
 	}
-	
+
 	local c_air = minetest.get_content_id("air")
 	local c_ignore = minetest.get_content_id("ignore")
-	
+
 	local vm = minetest.get_voxel_manip()
 	local emin, emax = vm:read_from_map(minp, maxp)
 	local area = VoxelArea:new{MinEdge = emin, MaxEdge = emax}
 	local data = vm:get_data()
-	
+
 	local seen_air = false
 	local deepest_place = vector.new(pos)
 	deepest_place.y = 50
-	
+
 	for x = minp.x, maxp.x do
 	for z = minp.z, maxp.z do
 		local solid = 0
@@ -125,7 +143,7 @@ function get_surface_pos(pos)
 		end
 	end
 	end
-	
+
 	if seen_air then
 		return deepest_place
 	else
@@ -140,4 +158,4 @@ minetest.register_entity("worldedge:lock", {
 	on_activate = function(staticdata, dtime_s)
 		--self.object:set_armor_groups({immortal = 1})
 	end
-})
\ No newline at end of file
+})