From e53732f41e6c2147ab220935b1cc735f25f0abb5 Mon Sep 17 00:00:00 2001
From: rubenwardy <rw@rubenwardy.com>
Date: Wed, 28 Aug 2019 17:05:59 +0100
Subject: [PATCH] Remove saving from ctf_pvp_engine

---
 mods/ctf/ctf_bounties/init.lua             |   1 -
 mods/ctf/ctf_disable_save/depends.txt      |   1 -
 mods/ctf/ctf_disable_save/init.lua         |   5 -
 mods/ctf/ctf_stats/gui.lua                 |   2 -
 mods/ctf/ctf_stats/init.lua                |  36 ++++--
 mods/ctf_pvp_engine/ctf/core.lua           |  72 +----------
 mods/ctf_pvp_engine/ctf/diplomacy.lua      |  73 +----------
 mods/ctf_pvp_engine/ctf/gui.lua            | 141 ---------------------
 mods/ctf_pvp_engine/ctf/init.lua           |   8 --
 mods/ctf_pvp_engine/ctf/teams.lua          |  10 --
 mods/ctf_pvp_engine/ctf_chat/init.lua      |   2 -
 mods/ctf_pvp_engine/ctf_colors/gui.lua     |   1 -
 mods/ctf_pvp_engine/ctf_flag/api.lua       |   2 -
 mods/ctf_pvp_engine/ctf_flag/flag_func.lua |   5 -
 mods/ctf_pvp_engine/ctf_flag/init.lua      |   3 +
 mods/ctf_pvp_engine/doc_data.md            |  18 +--
 16 files changed, 31 insertions(+), 349 deletions(-)
 delete mode 100644 mods/ctf/ctf_disable_save/depends.txt
 delete mode 100644 mods/ctf/ctf_disable_save/init.lua

diff --git a/mods/ctf/ctf_bounties/init.lua b/mods/ctf/ctf_bounties/init.lua
index 261cabb..0747cff 100644
--- a/mods/ctf/ctf_bounties/init.lua
+++ b/mods/ctf/ctf_bounties/init.lua
@@ -95,7 +95,6 @@ ctf.register_on_killedplayer(function(victim, killer)
 		match.score = match.score + bounty_score
 		main.bounty_kills = main.bounty_kills + 1
 		match.bounty_kills = match.bounty_kills + 1
-		ctf.needs_save = true
 	end
 	bountied_player = nil
 
diff --git a/mods/ctf/ctf_disable_save/depends.txt b/mods/ctf/ctf_disable_save/depends.txt
deleted file mode 100644
index 0dcc91d..0000000
--- a/mods/ctf/ctf_disable_save/depends.txt
+++ /dev/null
@@ -1 +0,0 @@
-ctf
diff --git a/mods/ctf/ctf_disable_save/init.lua b/mods/ctf/ctf_disable_save/init.lua
deleted file mode 100644
index fb7b8c8..0000000
--- a/mods/ctf/ctf_disable_save/init.lua
+++ /dev/null
@@ -1,5 +0,0 @@
-ctf.save = function()
-	for i = 1, #ctf.registered_on_save do
-		ctf.registered_on_save[i]()
-	end
-end
diff --git a/mods/ctf/ctf_stats/gui.lua b/mods/ctf/ctf_stats/gui.lua
index 457e69e..1e4e191 100644
--- a/mods/ctf/ctf_stats/gui.lua
+++ b/mods/ctf/ctf_stats/gui.lua
@@ -359,7 +359,6 @@ minetest.register_chatcommand("reset_rankings", {
 
 		ctf_stats.players[reset_name] = nil
 		ctf_stats.player(reset_name)
-		ctf.needs_save = true
 		return true, "Successfully reset the stats and ranking of " .. reset_name
 	end
 })
@@ -386,7 +385,6 @@ minetest.register_chatcommand("transfer_rankings", {
 
 		ctf_stats.players[dest] = ctf_stats.players[src]
 		ctf_stats.players[src] = nil
-		ctf.needs_save = true
 
 		return true, "Stats of '" .. src .. "' have been transferred to '" .. dest .. "'."
 	end
diff --git a/mods/ctf/ctf_stats/init.lua b/mods/ctf/ctf_stats/init.lua
index 24beeca..cd03da3 100644
--- a/mods/ctf/ctf_stats/init.lua
+++ b/mods/ctf/ctf_stats/init.lua
@@ -1,5 +1,6 @@
 ctf_stats = {}
 
+local _needs_save = false
 local storage = minetest.get_mod_storage()
 local prev_match_summary = storage:get_string("prev_match_summary")
 local data_to_persist = { "matches", "players" }
@@ -53,7 +54,7 @@ function ctf_stats.load_legacy()
 		blue = ctf_stats.matches.blue_wins or 0,
 	}
 
-	ctf.needs_save = true
+	_needs_save = true
 
 	os.remove(minetest.get_worldpath() .. "/ctf_stats.txt")
 	return true
@@ -64,7 +65,7 @@ function ctf_stats.load()
 		for _, key in pairs(data_to_persist) do
 			ctf_stats[key] = minetest.parse_json(storage:get_string(key))
 		end
-		ctf.needs_save = true
+		_needs_save = true
 	end
 
 	-- Make sure all tables are present
@@ -87,20 +88,27 @@ function ctf_stats.load()
 	for name, player_stats in pairs(ctf_stats.players) do
 		if not player_stats.score or player_stats.score <= 0 then
 			ctf_stats.players[name] = nil
-			ctf.needs_save = true
+			_needs_save = true
 		else
 			player_stats.bounty_kills = player_stats.bounty_kills or 0
 		end
 	end
 end
 
-ctf.register_on_save(function()
+function ctf_stats.save()
+	if not _needs_save then
+		return
+	end
+
+	_needs_save = false
+
 	for _, key in pairs(data_to_persist) do
 		storage:set_string(key, minetest.write_json(ctf_stats[key]))
 	end
 
-	return nil
-end)
+	minetest.after(13, ctf_stats.save)
+end
+minetest.after(13, ctf_stats.save)
 
 function ctf_stats.player_or_nil(name)
 	return ctf_stats.players[name], ctf_stats.current.red[name] or ctf_stats.current.blue[name]
@@ -154,7 +162,7 @@ table.insert(ctf_flag.registered_on_capture, 1, function(name, flag)
 		main.score     = main.score     + 25
 		match.captures = match.captures + 1
 		match.score    = match.score    + 25
-		ctf.needs_save = true
+		_needs_save = true
 	end
 	winner_player = name
 
@@ -166,7 +174,7 @@ table.insert(ctf_flag.registered_on_capture, 1, function(name, flag)
 end)
 
 ctf_match.register_on_winner(function(winner)
-	ctf.needs_save = true
+	_needs_save = true
 	ctf_stats.matches.wins[winner] = ctf_stats.matches.wins[winner] + 1
 	winner_team = winner
 
@@ -183,7 +191,7 @@ ctf_match.register_on_winner(function(winner)
 end)
 
 ctf_match.register_on_skip_map(function()
-	ctf.needs_save = true
+	_needs_save = true
 	ctf_stats.matches.skipped = ctf_stats.matches.skipped + 1
 
 	-- Show match summary
@@ -206,7 +214,7 @@ ctf_match.register_on_new_match(function()
 	winner_team = "-"
 	winner_player = "-"
 	ctf_stats.start = os.time()
-	ctf.needs_save = true
+	_needs_save = true
 end)
 
 ctf_flag.register_on_pick_up(function(name, flag)
@@ -216,7 +224,7 @@ ctf_flag.register_on_pick_up(function(name, flag)
 		main.score     = main.score     + 10
 		match.attempts = match.attempts + 1
 		match.score    = match.score    + 10
-		ctf.needs_save = true
+		_needs_save = true
 	end
 
 	hud_score.new(name, {
@@ -231,7 +239,7 @@ ctf_flag.register_on_precapture(function(name, flag)
 	local main, _ = ctf_stats.player(name)
 	if main then
 		main.wins[tplayer.team] = main.wins[tplayer.team] + 1
-		ctf.needs_save = true
+		_needs_save = true
 	end
 	return true
 end)
@@ -313,7 +321,7 @@ ctf.register_on_killedplayer(function(victim, killer)
 		match.kills = match.kills + 1
 		match.score = match.score + reward
 		match.kills_since_death = match.kills_since_death + 1
-		ctf.needs_save = true
+		_needs_save = true
 
 		reward = math.floor(reward * 100) / 100
 
@@ -331,7 +339,7 @@ minetest.register_on_dieplayer(function(player)
 		main.deaths = main.deaths + 1
 		match.deaths = match.deaths + 1
 		match.kills_since_death = 0
-		ctf.needs_save = true
+		_needs_save = true
 	end
 end)
 
diff --git a/mods/ctf_pvp_engine/ctf/core.lua b/mods/ctf_pvp_engine/ctf/core.lua
index ebc67e4..52906f1 100644
--- a/mods/ctf_pvp_engine/ctf/core.lua
+++ b/mods/ctf_pvp_engine/ctf/core.lua
@@ -53,13 +53,6 @@ function ctf.register_on_load(func)
 		func(ctf._loaddata)
 	end
 end
-ctf.registered_on_save = {}
-function ctf.register_on_save(func)
-	if ctf._mt_loaded then
-		error("You can't register callbacks at game time!")
-	end
-	table.insert(ctf.registered_on_save, func)
-end
 ctf.registered_on_init = {}
 function ctf.register_on_init(func)
 	if ctf._mt_loaded then
@@ -203,67 +196,8 @@ function ctf.setting(name)
 end
 
 function ctf.load()
-	ctf.log("io", "Loading CTF state")
-	local file = io.open(minetest.get_worldpath().."/ctf.txt", "r")
-	if file then
-		local table = minetest.deserialize(file:read("*all"))
-		if type(table) == "table" then
-			ctf.teams = table.teams
-			ctf.players = table.players
-
-			for i = 1, #ctf.registered_on_load do
-				ctf.registered_on_load[i](table)
-			end
-			return
-		end
-		ctf._loaddata = table
-	else
-		ctf.log("io", "ctf.txt is not present in the world folder")
-		ctf._new_game = true
-		for i = 1, #ctf.registered_on_new_game do
-			ctf.registered_on_new_game[i]()
-		end
-	end
-end
-
-minetest.after(0, function()
-	ctf._loaddata = nil
-	ctf._mt_loaded = true
-end)
-
-function ctf.check_save()
-	if ctf_flag and ctf_flag.assert_flags then
-		ctf_flag.assert_flags()
-	end
-	if ctf.needs_save then
-		ctf.save()
-	end
-	minetest.after(10, ctf.check_save)
-end
-minetest.after(10, ctf.check_save)
-
-function ctf.save()
-	local file = io.open(minetest.get_worldpath().."/ctf.txt", "w")
-	if file then
-		local out = {
-			teams = ctf.teams,
-			players = ctf.players
-		}
-
-		for i = 1, #ctf.registered_on_save do
-			local res = ctf.registered_on_save[i]()
-
-			if res then
-				for key, value in pairs(res) do
-					out[key] = value
-				end
-			end
-		end
-
-		file:write(minetest.serialize(out))
-		file:close()
-    	ctf.needs_save = false
-	else
-		ctf.error("io", "CTF file failed to save!")
+	ctf._new_game = true
+	for i = 1, #ctf.registered_on_new_game do
+		ctf.registered_on_new_game[i]()
 	end
 end
diff --git a/mods/ctf_pvp_engine/ctf/diplomacy.lua b/mods/ctf_pvp_engine/ctf/diplomacy.lua
index a753c8c..2371141 100644
--- a/mods/ctf_pvp_engine/ctf/diplomacy.lua
+++ b/mods/ctf_pvp_engine/ctf/diplomacy.lua
@@ -7,77 +7,6 @@ ctf.register_on_load(function(table)
 	ctf.diplo.diplo = table.diplo
 end)
 
-ctf.register_on_save(function()
-	return { diplo = ctf.diplo.diplo }
-end)
-
 function ctf.diplo.get(one,two)
-	if not ctf.diplo.diplo then
-		return ctf.setting("default_diplo_state")
-	end
-
-	for i = 1, #ctf.diplo.diplo do
-		local dip = ctf.diplo.diplo[i]
-		if (dip.one == one and dip.two == two) or
-				(dip.one == two and dip.two == one) then
-			return dip.state
-		end
-	end
-
-	return ctf.setting("default_diplo_state")
-end
-
-function ctf.diplo.set(one, two, state)
-	if ctf.diplo.diplo then
-		-- Check the table for an existing diplo state
-		for i = 1, #ctf.diplo.diplo do
-			local dip = ctf.diplo.diplo[i]
-			if (dip.one == one and dip.two == two) or
-					(dip.one == two and dip.two == one) then
-				dip.state = state
-				return
-			end
-		end
-	else
-		ctf.diplo.diplo = {}
-	end
-
-	table.insert(ctf.diplo.diplo,{one=one,two=two,state=state})
-end
-
-function ctf.diplo.check_requests(one, two)
-	local team = ctf.team(two)
-
-	if not team.log then
-		return nil
-	end
-
-	for i=1,#team.log do
-		if team.log[i].team == one and
-				team.log[i].type == "request" and
-				team.log[i].mode == "diplo" then
-			return team.log[i].msg
-		end
-	end
-
-	return nil
-end
-
-function ctf.diplo.cancel_requests(one, two)
-	local team = ctf.team(two)
-
-	if not team.log then
-		return
-	end
-
-	for i=1,#team.log do
-		if team.log[i].team == one and
-				team.log[i].type == "request" and
-				team.log[i].mode == "diplo" then
-			table.remove(team.log,i)
-			return
-		end
-	end
-
-	return
+	return "war"
 end
diff --git a/mods/ctf_pvp_engine/ctf/gui.lua b/mods/ctf_pvp_engine/ctf/gui.lua
index 58a5964..7b62eec 100644
--- a/mods/ctf_pvp_engine/ctf/gui.lua
+++ b/mods/ctf_pvp_engine/ctf/gui.lua
@@ -131,73 +131,6 @@ ctf.gui.register_tab("news", "News", function(name, tname)
 		result)
 end)
 
--- Team interface
-ctf.gui.register_tab("diplo", "Diplomacy", function(name, tname)
-	local result = ""
-	local data = {}
-
-	local amount = 0
-
-	for key, value in pairs(ctf.teams) do
-		if key ~= tname then
-			table.insert(data,{
-					team  = key,
-					state = ctf.diplo.get(tname, key),
-					to    = ctf.diplo.check_requests(tname, key),
-					from  = ctf.diplo.check_requests(key, tname)
-				})
-		end
-	end
-
-	result = result .. "label[1,1;Diplomacy from the perspective of " .. tname .. "]"
-
-	for i = 1, #data do
-		amount = i
-		local height = (i*1)+0.5
-
-		if height > 5 then
-			break
-		end
-
-		result = result .. "background[1," .. height .. ";8.2,1;diplo_" ..
-				data[i].state .. ".png]"
-		result = result .. "button[1.25," .. height .. ";2,1;team_" ..
-				data[i].team .. ";" .. data[i].team .. "]"
-		result = result .. "label[3.75," .. height .. ";" .. data[i].state
-				.. "]"
-
-		if ctf.can_mod(name, tname) and ctf.player(name).team == tname then
-			if not data[i].from and not data[i].to then
-				if data[i].state == "war" then
-					result = result .. "button[7.5," .. height ..
-							";1.5,1;peace_" .. data[i].team .. ";Peace]"
-				elseif data[i].state == "peace" then
-					result = result .. "button[6," .. height ..
-							";1.5,1;war_" .. data[i].team .. ";War]"
-					result = result .. "button[7.5," .. height ..
-							";1.5,1;alli_" .. data[i].team .. ";Alliance]"
-				elseif data[i].state == "alliance" then
-					result = result .. "button[6," .. height ..
-							";1.5,1;peace_" .. data[i].team .. ";Peace]"
-				end
-			elseif data[i].from ~= nil then
-				result = result .. "label[6," .. height ..
-						";request recieved]"
-			elseif data[i].to ~= nil then
-				result = result .. "label[5.5," .. height ..
-						";request sent]"
-				result = result .. "button[7.5," .. height ..
-						";1.5,1;cancel_" .. data[i].team .. ";Cancel]"
-			end
-		end
-	end
-
-	minetest.show_formspec(name, "ctf:diplo",
-		"size[10,7]" ..
-		ctf.gui.get_tabs(name, tname) ..
-		result
-	)
-end)
 
 local function formspec_is_ctf_tab(fsname)
 	for name, tab in pairs(ctf.gui.tabs) do
@@ -234,7 +167,6 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	-- News page
 	if fields.clear then
 		team.log = {}
-		ctf.needs_save = true
 		ctf.gui.show(name, "news")
 		return true
 	end
@@ -272,82 +204,9 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 				end
 
 				table.remove(team.log, id)
-				ctf.needs_save = true
 				ctf.gui.show(name, "news")
 				return true
 			end
 		end
 	end
 end)
-
-minetest.register_on_player_receive_fields(function(player, formname, fields)
-	local name    = player:get_player_name()
-	local tplayer = ctf.player(name)
-	local tname   = tplayer.team
-	local team    = ctf.team(tname)
-
-	if not team or formname ~= "ctf:diplo" then
-		return false
-	end
-
-	for key, field in pairs(fields) do
-		local tname2 = string.match(key, "team_(.+)")
-		if tname2 and ctf.team(tname2) then
-			ctf.gui.show(name, "diplo", tname2)
-			return true
-		end
-
-		if ctf.can_mod(name, tname) then
-			tname2 = string.match(key, "peace_(.+)")
-			if tname2 then
-				if ctf.diplo.get(tname, tname2) == "war" then
-					ctf.post(tname2, {
-						type = "request",
-						msg  = "peace",
-						team = tname,
-						mode = "diplo" })
-				else
-					ctf.diplo.set(tname, tname2, "peace")
-					ctf.post(tname, {
-						msg = "You have cancelled the alliance treaty with " .. tname2 })
-					ctf.post(tname2, {
-						msg = tname .. " has cancelled the alliance treaty" })
-				end
-
-				ctf.gui.show(name, "diplo")
-				return true
-			end
-
-			tname2 = string.match(key, "war_(.+)")
-			if tname2 then
-				ctf.diplo.set(tname, tname2, "war")
-				ctf.post(tname, {
-					msg = "You have declared war on " .. tname2 })
-				ctf.post(tname2, {
-					msg = tname .. " has declared war on you" })
-
-				ctf.gui.show(name, "diplo")
-				return true
-			end
-
-			tname2 = string.match(key, "alli_(.+)")
-			if tname2 then
-				ctf.post(tname2, {
-					type = "request",
-					msg  = "alliance",
-					team = tname,
-					mode = "diplo" })
-
-				ctf.gui.show(name, "diplo")
-				return true
-			end
-
-			tname2 = string.match(key, "cancel_(.+)")
-			if tname2 then
-				ctf.diplo.cancel_requests(tname, tname2)
-				ctf.gui.show(name, "diplo")
-				return true
-			end
-		end -- end if can mod
-	end -- end for each field
-end)
diff --git a/mods/ctf_pvp_engine/ctf/init.lua b/mods/ctf_pvp_engine/ctf/init.lua
index 61d3f8f..b34289e 100644
--- a/mods/ctf_pvp_engine/ctf/init.lua
+++ b/mods/ctf_pvp_engine/ctf/init.lua
@@ -4,14 +4,6 @@
 
 ctf = {}
 
--- Fix for https://github.com/minetest/minetest/issues/2383
-local csa = minetest.chat_send_all
-function minetest.chat_send_all(msg)
-	minetest.after(0, function()
-		csa(msg)
-	end)
-end
-
 -- Privs
 minetest.register_privilege("ctf_team_mgr", {
 	description = "Team manager",
diff --git a/mods/ctf_pvp_engine/ctf/teams.lua b/mods/ctf_pvp_engine/ctf/teams.lua
index 362fd6f..89f3f0f 100644
--- a/mods/ctf_pvp_engine/ctf/teams.lua
+++ b/mods/ctf_pvp_engine/ctf/teams.lua
@@ -40,8 +40,6 @@ function ctf.create_team(name, data)
 		ctf.registered_on_new_team[i](ctf.teams[name])
 	end
 
-	ctf.needs_save = true
-
 	return ctf.teams[name]
 end
 
@@ -55,7 +53,6 @@ function ctf.remove_team(name)
 			team.flags[i].team = nil
 		end
 		ctf.teams[name] = nil
-		ctf.needs_save = true
 		return true
 	else
 		return false
@@ -99,7 +96,6 @@ function ctf.new_player(name)
 		ctf.players[name] = {
 			name = name
 		}
-		ctf.needs_save = true
 	else
 		ctf.error("team", "Can't create a blank player")
 		ctf.log("team", debug.traceback())
@@ -137,7 +133,6 @@ function ctf.remove_player(name)
 			team.players[name] = nil
 		end
 		ctf.players[name] = nil
-		ctf.needs_save = true
 		return true
 	else
 		return false
@@ -210,8 +205,6 @@ function ctf.join(name, team, force, by)
 	team_data.players[player.name] = player
 	ctf.player_last_team[name] = team
 
-	ctf.needs_save = true
-
 	minetest.log("action", name .. " joined team " .. team)
 	minetest.chat_send_all(name.." has joined team "..team)
 
@@ -232,8 +225,6 @@ function ctf.clean_player_lists()
 			ctf.log("utils", " - Skipping player "..str.name)
 		end
 	end
-
-	ctf.needs_save = true
 end
 
 -- Sees if the player can change stuff in a team
@@ -268,7 +259,6 @@ function ctf.post(team, msg)
 	ctf.log("team", "message posted to team board")
 
 	table.insert(ctf.team(team).log, 1, msg)
-	ctf.needs_save = true
 
 	return true
 end
diff --git a/mods/ctf_pvp_engine/ctf_chat/init.lua b/mods/ctf_pvp_engine/ctf_chat/init.lua
index 8ccc192..30034a1 100644
--- a/mods/ctf_pvp_engine/ctf_chat/init.lua
+++ b/mods/ctf_pvp_engine/ctf_chat/init.lua
@@ -242,7 +242,6 @@ minetest.register_chatcommand("ctf_reload", {
 	description = "reload the ctf main frame and get settings",
 	privs = {ctf_admin=true},
 	func = function(name, param)
-		ctf.needs_save = true
 		ctf.init()
 		return true, "CTF core reloaded!"
 	end
@@ -274,7 +273,6 @@ minetest.register_chatcommand("team_owner", {
 				ctf.player(param).auth = true
 				return true, param.." was upgraded to an admin of "..ctf.player(name).team
 			end
-			ctf.needs_save = true
 		else
 			return false, "Unable to do that :/ "..param.." does not exist, or is not part of a valid team."
 		end
diff --git a/mods/ctf_pvp_engine/ctf_colors/gui.lua b/mods/ctf_pvp_engine/ctf_colors/gui.lua
index 6a0beed..c6a19c9 100644
--- a/mods/ctf_pvp_engine/ctf_colors/gui.lua
+++ b/mods/ctf_pvp_engine/ctf_colors/gui.lua
@@ -35,7 +35,6 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 		if team and ctf.can_mod(name, pdata.team) then
 			if ctf.flag_colors[fields.color] then
 				team.data.color = fields.color
-				ctf.needs_save = true
 
 				minetest.chat_send_player(name, "Team color set to " .. fields.color)
 			else
diff --git a/mods/ctf_pvp_engine/ctf_flag/api.lua b/mods/ctf_pvp_engine/ctf_flag/api.lua
index 478a5c1..e6c42ec 100644
--- a/mods/ctf_pvp_engine/ctf_flag/api.lua
+++ b/mods/ctf_pvp_engine/ctf_flag/api.lua
@@ -103,7 +103,6 @@ function ctf_flag.add(team, pos)
 
 	pos.team = team
 	table.insert(ctf.team(team).flags,pos)
-	ctf.needs_save = true
 end
 
 function ctf_flag.update(pos)
@@ -135,7 +134,6 @@ function ctf_flag.update(pos)
 
 	if not ctf.team(flag_team_data.team).data.color then
 		ctf.team(flag_team_data.team).data.color = "red"
-		ctf.needs_save = true
 	end
 
 	if flag_team_data.claimed then
diff --git a/mods/ctf_pvp_engine/ctf_flag/flag_func.lua b/mods/ctf_pvp_engine/ctf_flag/flag_func.lua
index b6542c4..b9a899e 100644
--- a/mods/ctf_pvp_engine/ctf_flag/flag_func.lua
+++ b/mods/ctf_pvp_engine/ctf_flag/flag_func.lua
@@ -79,8 +79,6 @@ local function do_capture(attname, flag, returned)
 			ctf_flag.registered_on_capture[i](attname, flag)
 		end
 	end
-
-	ctf.needs_save = true
 end
 
 local function player_drop_flag(player)
@@ -227,8 +225,6 @@ ctf_flag = {
 				team.spawn = pos
 			end
 
-			ctf.needs_save = true
-
 			local pos2 = {
 				x = pos.x,
 				y = pos.y + 1,
@@ -237,7 +233,6 @@ ctf_flag = {
 
 			if not team.data.color then
 				team.data.color = "red"
-				ctf.needs_save = true
 			end
 
 			minetest.set_node(pos2, {name="ctf_flag:flag_top_"..team.data.color})
diff --git a/mods/ctf_pvp_engine/ctf_flag/init.lua b/mods/ctf_pvp_engine/ctf_flag/init.lua
index 1022d5e..c19627a 100644
--- a/mods/ctf_pvp_engine/ctf_flag/init.lua
+++ b/mods/ctf_pvp_engine/ctf_flag/init.lua
@@ -141,6 +141,9 @@ local function update_flag_drops()
 				" seconds to capture the flag before it returns.")
 		end
 	end
+
+	ctf_flag.assert_flags()
+
 	minetest.after(5, update_flag_drops)
 end
 minetest.after(5, update_flag_drops)
diff --git a/mods/ctf_pvp_engine/doc_data.md b/mods/ctf_pvp_engine/doc_data.md
index eca89bd..76b3d9a 100644
--- a/mods/ctf_pvp_engine/doc_data.md
+++ b/mods/ctf_pvp_engine/doc_data.md
@@ -1,20 +1,6 @@
-# Data Formats
-
-This file documents the contents of ctf.txt  
-Values are added to the file using ctf.register_on_save and ctf.register_on_load.  
-Here are the default values:
-
-```lua
-{
-	players = ctf.players,
-	teams = ctf.teams,
-	diplo = ctf.diplo.diplo
-}
-```
-
 ## Players
 
-Commonly called tplayer (may be called data or player in old code).  
+Commonly called tplayer (may be called data or player in old code).
 Player name is commonly called name (but may be called other things in older code).
 
 ```lua
@@ -34,7 +20,7 @@ ctf.players = {
 
 ## Teams
 
-Commonly called team.  
+Commonly called team.
 Team name is commonly called tname (but may be called team in old code).
 
 ```lua