Add hb.get_hudbar_identifiers()

API.md

@@ -170,7 +170,7 @@ Makes a previously hidden HUD bar visible again to a player.
 
 
 ## Reading HUD bar information
-It is also possible to read information about an active HUD bar.
+It is also possible to read information about existing HUD bars.
 
 ### `hb.get_hudbar_state(player, identifier)`
 Returns the current state of the active player's HUD bar.
@@ -191,3 +191,6 @@ hold by the table is only true for the moment you called this function. The fiel
 * `text`: The text shown on the HUD bar. This fiels is meaningless if the HUD bar is currently hidden.
 
 If the player does not exist, returns `nil` instead.
+
+### `hb.get_hudbar_identifiers()`
+Returns a table of all currently registered HUD bar identifiers.

init.lua

@@ -463,6 +463,14 @@ function hb.get_hudbar_state(player, identifier)
 	return copy
 end
 
+function hb.get_hudbar_identifiers()
+	local ids = {}
+	for id, _ in pairs(hb.hudtables) do
+		table.insert(ids, id)
+	end
+	return ids
+end
+
 --register built-in HUD bars
 if minetest.settings:get_bool("enable_damage") or hb.settings.forceload_default_hudbars then
 	hb.register_hudbar("health", 0xFFFFFF, S("Health"), { bar = "hudbars_bar_health.png", icon = "hudbars_icon_health.png", bgicon = "hudbars_bgicon_health.png" }, 20, 20, false)