capturetheflag/mods/pvp/anticoward/init.lua

-- Capture The Flag mod: anticoward

potential_cowards = {}
local TIMER_UPDATE_INTERVAL = 2
local COMBAT_TIMEOUT_TIME = 20
local COMBATLOG_SCORE_PENALTY = 10

--
--- Make suicides and combat logs award last puncher with kill
--

ctf.register_on_attack(function(player, hitter,
		time_from_last_punch, tool_capabilities, dir, damage)
	if player and hitter then
		local pname = player:get_player_name()
		local hname = hitter:get_player_name()

		if pname == hname then
			return
		end

		if not potential_cowards[pname] then
			potential_cowards[pname] = {
				hud = player:hud_add({
					hud_elem_type = "text",
					position = {x=1, y=0.3},
					name = "combat_hud",
					scale = {x = 2, y = 2},
					text = "You are in combat. If you leave/suicide your attacker will get the kill",
					number = 0xff0000,
					direction = 0,
					alignment = {x=-1, y=1},
					size = {x=1},
					z_index = 100,
				})
			}
		end

		potential_cowards[pname].timer = 0
		potential_cowards[pname].puncher = hname
		potential_cowards[pname].wielded_item = hitter:get_wielded_item()
		potential_cowards[pname].toolcaps = tool_capabilities
	end
end)

ctf.register_on_killedplayer(function(victim, killer, _, toolcaps)
	if toolcaps.damage_groups.combat_log or toolcaps.damage_groups.suicide then
		return
	end

	if victim ~= killer and potential_cowards[victim] then -- if player is killed then killer is already awarded
		local player = minetest.get_player_by_name(victim)
		if player then
			player:hud_remove(potential_cowards[victim].hud or 0)
		end

		potential_cowards[victim] = nil
	end
end)

function handle_leave_or_die(pname, leave)
	if potential_cowards[pname] then
		local hname = potential_cowards[pname].puncher

		if leave then
			potential_cowards[pname].toolcaps.damage_groups.combat_log = 1
		else
			potential_cowards[pname].toolcaps.damage_groups.suicide = 1
		end

		for i = 1, #ctf.registered_on_killedplayer do
			ctf.registered_on_killedplayer[i](
				pname,
				hname,
				potential_cowards[pname].wielded_item,
				potential_cowards[pname].toolcaps
			)
		end
	end

	for victim in pairs(potential_cowards) do
		if potential_cowards[victim].puncher == pname then
			local victimobj = minetest.get_player_by_name(victim)

			if victimobj then
				victimobj:hud_remove(potential_cowards[victim].hud or 0)
			end

			potential_cowards[victim] = nil
		end
	end
end

minetest.register_on_dieplayer(function(player, reason)
	local pname = player:get_player_name()

	handle_leave_or_die(pname, false)

	if potential_cowards[pname] then
		player:hud_remove(potential_cowards[pname].hud or 0)
		potential_cowards[pname] = nil
	end
end)

minetest.register_on_leaveplayer(function(player, timeout)
	if timeout == true then return end
	local pname = player:get_player_name()

	handle_leave_or_die(pname, true)

	if potential_cowards[pname] then
		local main, match = ctf_stats.player(pname)

		if main and match then
			main.deaths = main.deaths + 1
			match.deaths = match.deaths + 1
			main.score = main.score - COMBATLOG_SCORE_PENALTY
			match.score = match.score - COMBATLOG_SCORE_PENALTY
			match.kills_since_death = 0
			ctf_stats.request_save()
		end

		potential_cowards[pname] = nil
	end
end)

local globtimer = 0
minetest.register_globalstep(function(dtime)
	globtimer = globtimer + dtime

	if globtimer >= TIMER_UPDATE_INTERVAL then
		for k in pairs(potential_cowards) do
			potential_cowards[k].timer = potential_cowards[k].timer + globtimer

			if potential_cowards[k].timer >= COMBAT_TIMEOUT_TIME then
				local player = minetest.get_player_by_name(k)

				if player then
					player:hud_remove(potential_cowards[k].hud or 0)
				end

				potential_cowards[k] = nil
				kill_assist.clear_assists(k)
			end
		end

		globtimer = 0
	end
end)

ctf_match.register_on_new_match(function()
	for coward, info in pairs(potential_cowards) do
		coward = minetest.get_player_by_name(coward)

		if coward and info.hud then
			coward:hud_remove(info.hud)
		end
	end
	potential_cowards = {}
end)

ctf.register_on_new_game(function()
	for coward, info in pairs(potential_cowards) do
		coward = minetest.get_player_by_name(coward)

		if coward and info.hud then
			coward:hud_remove(info.hud)
		end
	end
	potential_cowards = {}
end)