Dehardcode the death formspec (#15155)

Co-authored-by: Paul Ouellette <oue.paul18@gmail.com>

builtin/game/death_screen.lua

@@ -0,0 +1,31 @@
+local F = core.formspec_escape
+local S = core.get_translator("__builtin")
+
+function core.show_death_screen(player, _reason)
+	local fs = {
+		"formspec_version[1]",
+		"size[11,5.5,true]",
+		"bgcolor[#320000b4;true]",
+		"label[4.85,1.35;", F(S("You died")), "]",
+		"button_exit[4,3;3,0.5;btn_respawn;", F(S("Respawn")), "]",
+	}
+	core.show_formspec(player:get_player_name(), "__builtin:death", table.concat(fs, ""))
+end
+
+core.register_on_dieplayer(function(player, reason)
+	core.show_death_screen(player, reason)
+end)
+
+core.register_on_joinplayer(function(player)
+	if player:get_hp() == 0 then
+		core.show_death_screen(player, nil)
+	end
+end)
+
+core.register_on_player_receive_fields(function(player, formname, fields)
+	if formname == "__builtin:death" and fields.quit and player:get_hp() == 0 then
+		player:respawn()
+		core.log("action", player:get_player_name() .. " respawns at " ..
+				player:get_pos():to_string())
+	end
+end)

builtin/game/init.lua

@@ -38,6 +38,7 @@ dofile(gamepath .. "forceloading.lua")
 dofile(gamepath .. "hud.lua")
 dofile(gamepath .. "knockback.lua")
 dofile(gamepath .. "async.lua")
+dofile(gamepath .. "death_screen.lua")
 
 core.after(0, builtin_shared.cache_content_ids)