From 69485f8505a7beccb9d4cec7ab6fc3f31e93eab3 Mon Sep 17 00:00:00 2001
From: Elias Fleckenstein <eliasfleckenstein@web.de>
Date: Mon, 19 Apr 2021 09:49:29 +0200
Subject: [PATCH] Integrate falling nodes damage

---
 mods/ENTITIES/mcl_falling_nodes/init.lua | 102 ++++++-----------------
 1 file changed, 27 insertions(+), 75 deletions(-)

diff --git a/mods/ENTITIES/mcl_falling_nodes/init.lua b/mods/ENTITIES/mcl_falling_nodes/init.lua
index 6e69f8911..831434d62 100644
--- a/mods/ENTITIES/mcl_falling_nodes/init.lua
+++ b/mods/ENTITIES/mcl_falling_nodes/init.lua
@@ -2,8 +2,6 @@ local S = minetest.get_translator("mcl_falling_nodes")
 local dmes = minetest.get_modpath("mcl_death_messages") ~= nil
 local has_mcl_armor = minetest.get_modpath("mcl_armor")
 
-local is_creative_enabled = minetest.is_creative_enabled
-
 local get_falling_depth = function(self)
 	if not self._startpos then
 		-- Fallback
@@ -23,80 +21,34 @@ local deal_falling_damage = function(self, dtime)
 		-- Fallback
 		self._startpos = pos
 	end
-	local objs = minetest.get_objects_inside_radius(pos, 1)
-	for _,v in ipairs(objs) do
-		if v:is_player() then
-			local hp = v:get_hp()
-			local name = v:get_player_name()
-			if hp ~= 0 then
-				if not self._hit_players then
-					self._hit_players = {}
-				end
-				local hit = false
-				for _,v in ipairs(self._hit_players) do
-					if name == v then
-						hit = true
+	self._hit = self._hit or {}
+	for _, obj in ipairs(minetest.get_objects_inside_radius(pos, 1)) do
+		if mcl_util.get_hp(obj) > 0 and not self._hit[obj] then
+			self._hit[obj] = true
+			local way = self._startpos.y - pos.y
+			local damage = (way - 1) * 2
+			damage = math.min(40, math.max(0, damage))
+			if damage >= 1 then
+				-- Reduce damage if wearing a helmet
+				local inv = mcl_util.get_inventory(obj)
+				if inv then
+					local helmet = inv:get_stack("armor", 2)
+					if minetest.get_item_group(helmet:get_name(), "combat_armor") > 0 then
+						damage = damage / 4 * 3
+						mcl_util.use_item_durability(helmet, 1)
+						inv:set_stack("armor", 2, helmet)
 					end
 				end
-				if not hit then
-					table.insert(self._hit_players, name)
-					local way = self._startpos.y - pos.y
-					local damage = (way - 1) * 2
-					damage = math.min(40, math.max(0, damage))
-					if damage >= 1 then
-						hp = hp - damage
-						if hp < 0 then
-							hp = 0
-						end
-						-- Reduce damage if wearing a helmet
-						local inv = v:get_inventory()
-						local helmet = inv:get_stack("armor", 2)
-						if has_mcl_armor and not helmet:is_empty() then
-							hp = hp/4*3
-							if not is_creative_enabled(name) then
-								helmet:add_wear(65535/helmet:get_definition().groups.mcl_armor_uses) --TODO: be sure damage is exactly like mc (informations are missing in the mc wiki)
-								inv:set_stack("armor", 2, helmet)
-							end
-						end
-						local msg
-						if minetest.get_item_group(self.node.name, "anvil") ~= 0 then
-							msg = S("@1 was smashed by a falling anvil.", v:get_player_name())
-						else
-							msg = S("@1 was smashed by a falling block.", v:get_player_name())
-						end
-						if dmes then
-							mcl_death_messages.player_damage(v, msg)
-						end
-						v:set_hp(hp, { type = "punch", from = "mod" })
-					end
+				local deathmsg, dmg_type
+				if minetest.get_item_group(self.node.name, "anvil") ~= 0 then
+					deathmsg, dmg_type = "@1 was smashed by a falling anvil.", "anvil"
+				else
+					deathmsg, dmg_type = "@1 was smashed by a falling block.", "falling_node"
 				end
-			end
-		else
-			local hp = v:get_luaentity().health
-			if hp and hp ~= 0 then
-				if not self._hit_mobs then
-					self._hit_mobs = {}
-				end
-				local hit = false
-				for _,mob in ipairs(self._hit_mobs) do
-					if v == mob then
-						hit = true
-					end
-				end
-				--TODO: reduce damage for mobs then they will be able to wear armor
-				if not hit then
-					table.insert(self._hit_mobs, v)
-					local way = self._startpos.y - pos.y
-					local damage = (way - 1) * 2
-					damage = math.min(40, math.max(0, damage))
-					if damage >= 1 then
-						hp = hp - damage
-						if hp < 0 then
-							hp = 0
-						end
-						v:get_luaentity().health = hp
-					end
+				if obj:is_player() then
+					mcl_death_messages.player_damage(obj, S(deathmsg, obj:get_player_name()))
 				end
+				mcl_util.deal_damage(obj, damage, {type = dmg_type})
 			end
 		end
 	end
@@ -166,7 +118,7 @@ minetest.register_entity(":__builtin:falling_node", {
 
 	on_activate = function(self, staticdata)
 		self.object:set_armor_groups({immortal = 1})
-		
+
 		local ds = minetest.deserialize(staticdata)
 		if ds then
 			self._startpos = ds._startpos
@@ -200,7 +152,7 @@ minetest.register_entity(":__builtin:falling_node", {
 		local np = {x = pos.x, y = pos.y + 0.3, z = pos.z}
 		local n2 = minetest.get_node(np)
 		if n2.name == "mcl_portals:portal_end" then
-			-- TODO: Teleport falling node. 
+			-- TODO: Teleport falling node.
 			self.object:remove()
 			return
 		end
@@ -239,7 +191,7 @@ minetest.register_entity(":__builtin:falling_node", {
 			end
 			local nd = minetest.registered_nodes[n2.name]
 			if n2.name == "mcl_portals:portal_end" then
-				-- TODO: Teleport falling node. 
+				-- TODO: Teleport falling node.
 
 			elseif (nd and nd.buildable_to == true) or minetest.get_item_group(self.node.name, "crush_after_fall") ~= 0 then
 				-- Replace destination node if it's buildable to