Merge branch 'master' of https://github.com/MT-CTF/capturetheflag

mods/pvp/place_limit/License.txt

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+Copyright (c) 2021  appgurueu
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

mods/pvp/place_limit/Readme.md

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+# `place_limit`
+
+Fixes two things related to node placement:
+
+* Ratelimits node placement
+* Disallows building to non-pointable nodes (anticheat + race condition fix)
+
+Licensed under the MIT license, written by appgurueu.

mods/pvp/place_limit/init.lua

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+-- Licensed under the MIT license, written by appgurueu.
+local players = {}
+local blocks_per_second = 5
+local resend_notification_seconds = 10
+-- Bootstrap 4 "warning" color
+local warning_color = 0xFFC107
+
+minetest.register_on_joinplayer(function(player)
+	-- player has to wait after join before they can place a node
+	players[player:get_player_name()] = {
+		last_notification_sent = -math.huge
+	}
+end)
+
+minetest.register_on_leaveplayer(function(player)
+	players[player:get_player_name()] = nil
+end)
+
+minetest.register_on_placenode(function(pos, _newnode, placer, oldnode, _itemstack, pointed_thing)
+	local name = placer:get_player_name()
+	if not ItemStack(minetest.get_node(pointed_thing.under).name):get_definition().pointable then
+		-- This should happen rarely
+		hud_event.new(name, {
+			name  = "place_limit:unpointable",
+			color = warning_color,
+			value = "Block not pointable (dug/replaced)!",
+		})
+		minetest.set_node(pos, oldnode)
+		return true
+	end
+	local time = minetest.get_us_time()
+	local placements = players[name]
+	for i = #placements, 1, -1 do
+		if time - placements[i] > 1e6 then
+			placements[i] = nil
+		end
+	end
+	if #placements >= blocks_per_second then
+		if (time - placements.last_notification_sent) / 1e6 >= resend_notification_seconds then
+			hud_event.new(name, {
+				name  = "place_limit:speed",
+				color = warning_color,
+				value = "Placing too fast!",
+			})
+			placements.last_notification_sent = time
+		end
+		minetest.set_node(pos, oldnode)
+		return true
+	end
+	table.insert(placements, 1, time)
+end)

mods/pvp/place_limit/mod.conf

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+name = place_limit
+description = Limits block placement
+depends = hud_events