capturetheflag/mods/ctf/ctf_bounties/init.lua

local bountied_player = nil
local bounty_score = 0

local function announce(name)
	local bountied = ctf.player(bountied_player)
	if ctf.player(name).team == bountied.team then
		return
	end
	local tcolor = ctf_colors.get_color(bountied)
	minetest.chat_send_player(name,
			minetest.colorize("#fff326", "The next person to kill ") ..
			minetest.colorize(tcolor.css, bountied_player) ..
			minetest.colorize("#fff326", " will receive ") ..
	        minetest.colorize("#7efc00", bounty_score) ..
	        minetest.colorize("#fff326", " points!"))
end

local function announce_all()
	if bountied_player then
		for _, player in pairs(minetest.get_connected_players()) do
			announce(player:get_player_name())
		end
	end
end

local function bounty_player(target)
	local prev = bountied_player
	bountied_player = target

	-- Players with less than 20000 points --> bounty 50
	--
	-- ########################################################
	--
	-- Players between 20000 points and 50000 points:
	--
	--                  Score
	-- bounty_score = ----------, or 500 (whichever is lesser)
	--                  deaths
	--
	-- ########################################################
	--
	-- Players with more than 50000 points:
	--
	--                 Score * 2
	-- bounty_score = -----------, or 500 (whichever is lesser)
	--                  deaths

	local pstat = ctf_stats.player(target)
	if pstat.deaths == 0 then
		pstat.deaths = 1
	end

	if pstat.score <= 20000 then
		bounty_score = 50
	elseif pstat.score <= 50000 then
		bounty_score = (pstat.score / pstat.deaths)
	else
		bounty_score = ((pstat.score * 2) / pstat.deaths)
	end

	if bounty_score > 500 then
		bounty_score = 500
	end
	if bounty_score < 50 then
		bounty_score = 50
	end
	bounty_score = math.floor(bounty_score)

	if prev then
		for _, player in pairs(minetest.get_connected_players()) do
			local name = player:get_player_name()
			if bountied_player ~= name then
				local prev_color = ctf_colors.get_color(ctf.player(prev)).css
				minetest.chat_send_player(player:get_player_name(),
					minetest.colorize("#fff326", "Player ") ..
					minetest.colorize(prev_color, prev) ..
					minetest.colorize("#fff326", " no longer has a bounty on their head!"))
			end
		end
	end

	minetest.after(0.1, announce_all)
end

local function bounty_find_new_target()
	local players = {}
	for _, player in pairs(minetest.get_connected_players()) do
		local name = player:get_player_name()
		if ctf_stats.is_pro(name) and name ~= bountied_player then
			table.insert(players, name)
		end
	end

	if #players > 0 then
		bounty_player(players[math.random(1, #players)])
	end

	minetest.after(math.random(500, 1000), bounty_find_new_target)
end
minetest.after(math.random(500, 1000), bounty_find_new_target)

minetest.register_on_joinplayer(function(player)
	local name = player:get_player_name()
	if bountied_player and bountied_player ~= name then
		announce(name)
	end
end)

ctf.register_on_killedplayer(function(victim, killer)
	if victim ~= bountied_player or victim == killer then
		return
	end

	local main, match = ctf_stats.player(killer)
	if main and match then
		main.score  = main.score  + bounty_score
		match.score = match.score + bounty_score
		main.bounty_kills = main.bounty_kills + 1
		match.bounty_kills = match.bounty_kills + 1

		ctf_stats.request_save()

		hud_score.new(killer, {
			name = "ctf_bounty:prize",
			color = 0x4444FF,
			value = bounty_score
		})
	end
	bountied_player = nil

	local killer_color = ctf_colors.get_color(ctf.player(killer)).css
	local victim_color = ctf_colors.get_color(ctf.player(victim)).css
	local msg = minetest.colorize(killer_color, killer) ..
		minetest.colorize("#fff326", " has killed ") ..
		minetest.colorize(victim_color, victim) ..
		minetest.colorize("#fff326", " and received " ) ..
		minetest.colorize("#7efc00", bounty_score) ..
		minetest.colorize("#fff326", " points!")
	minetest.log("action", minetest.strip_colors(msg))
	minetest.chat_send_all(msg)
end)

minetest.register_privilege("bounty_admin")

minetest.register_chatcommand("place_bounty", {
	description = "Place a bounty on a player",
	params = "<player name>",
	privs = { bounty_admin = true },
	func = function(name, target)
		target = target:trim()
		if not minetest.get_player_by_name(target) then
			return false, target .. " is not online"
		end

		bounty_player(target)
		minetest.log("action", name .. " places bounty on " .. target)
		return true, "Put bounty on " .. target
	end
})