separate player table from global, add is_visible()

README.md

@@ -17,3 +17,4 @@ Changelog:
  - 0.4 - Potion recipe changed now that Nyan Cat no longer in default game
  - 0.5 - Use newer functions, Minetest 0.4.16 and anove needed to run
  - 0.6 - Make invisibility function global for API use, add time setting.
+ - 0.7 - Remove player list from global table and add invisibility.is_visible(name).

api.txt

@@ -9,6 +9,12 @@ visible once again e.g.
 invisibility.invisible(player, [true for invisible, false for visible])
 
 
+Mods can also check if a player is invisible by using the following function, which will
+return True if they can be seen and False when invisible.
+
+invisibility.is_visible(player_name)
+
+
 Server owners can also use the /vanish command to hide either themselves or another
 player in their worlds e.g.
 

init.lua

@@ -5,7 +5,10 @@ invisibility = {
 	effect_time = minetest.settings:get("invisibility.effect_time") or 180 -- 3 mins
 }
 
-local S = minetest.get_translator("invisibility") -- translation support
+-- translation and player table
+
+local S = minetest.get_translator("invisibility")
+local players = {}
 
 -- reset player invisibility if they go offline or die
 
@@ -13,9 +16,7 @@ minetest.register_on_leaveplayer(function(player)
 
 	local name = player:get_player_name()
 
-	if invisibility[name] then
-		invisibility[name] = nil
-	end
+	if players[name] then players[name] = nil end
 end)
 
 minetest.register_on_dieplayer(function(player)
@@ -29,7 +30,14 @@ local function is_creative(name)
 	return creative_mode_cache or minetest.check_player_privs(name, {creative = true})
 end
 
--- invisibility function
+-- invisibility functions
+
+function invisibility.is_visible(player_name)
+
+	if players[player_name] then return false end
+
+	return true
+end
 
 function invisibility.invisible(player, toggle)
 
@@ -37,7 +45,7 @@ function invisibility.invisible(player, toggle)
 
 	local name = player:get_player_name()
 
-	invisibility[name] = toggle
+	players[name] = toggle
 
 	local prop
 
@@ -80,7 +88,7 @@ minetest.register_node("invisibility:potion", {
 		local name = user:get_player_name()
 
 		-- are we already invisible?
-		if invisibility[name] then
+		if players[name] then
 
 			minetest.chat_send_player(name, S(">>> You are already invisible!"))
 
@@ -97,7 +105,7 @@ minetest.register_node("invisibility:potion", {
 		-- display 10 second warning
 		minetest.after(invisibility.effect_time - 10, function()
 
-			if invisibility[name] and user:get_pos() then
+			if players[name] and user:get_pos() then
 
 				minetest.chat_send_player(name,
 						S(">>> You have 10 seconds before invisibility wears off!"))
@@ -107,7 +115,7 @@ minetest.register_node("invisibility:potion", {
 		-- make player visible 5 minutes later
 		minetest.after(invisibility.effect_time, function()
 
-			if invisibility[name] and user:get_pos() then
+			if players[name] and user:get_pos() then
 
 				-- show hidden player
 				invisibility.invisible(user, nil)
@@ -119,7 +127,7 @@ minetest.register_node("invisibility:potion", {
 		end)
 
 		-- take potion, return empty bottle (and rest of potion stack)
-		if not is_creative(user:get_player_name()) then
+		if not is_creative(name) then
 
 			local item_count = user:get_wielded_item():get_count()
 			local inv = user:get_inventory()
@@ -182,7 +190,7 @@ minetest.register_chatcommand("vanish", {
 		local msg
 
 		-- hide / show player
-		if invisibility[name] then
+		if players[name] then
 
 			invisibility.invisible(player, nil) ; msg = "visible"
 		else