Fix tab access on priv revoking

src/api.lua

@@ -167,6 +167,13 @@ function i3.set_fs(player)
 		sort_inventory(player, data)
 	end
 
+	for i, tab in ipairs(i3.tabs) do
+		if data.tab == i and tab.access and not tab.access(player, data) then
+			data.tab = 1
+			break
+		end
+	end
+
 	local fs = make_fs(player, data)
 	player:set_inventory_formspec(fs)
 end
@@ -221,8 +228,8 @@ function i3.set_tab(player, tabname)
 		return
 	end
 
-	for i, def in ipairs(i3.tabs) do
-		if def.name == tabname then
+	for i, tab in ipairs(i3.tabs) do
+		if tab.name == tabname then
 			data.tab = i
 			return
 		end

src/gui.lua

@@ -1516,6 +1516,7 @@ local function make_fs(player, data)
 	fs("bg9", 0, 0, data.inv_width, full_height, PNG.bg_full, 10)
 
 	local tab = i3.tabs[data.tab]
+
 	if tab then
 		tab.formspec(player, data, fs)
 	end
@@ -1526,7 +1527,15 @@ local function make_fs(player, data)
 		get_items_fs(fs, data, player, full_height)
 	end
 
-	if #i3.tabs > 1 then
+	local visible_tabs = 1
+
+	for _, def in ipairs(i3.tabs) do
+		if visible_tabs < 2 and def.access and def.access(player, data) then
+			visible_tabs++
+		end
+	end
+
+	if visible_tabs > 1 then
 		get_tabs_fs(fs, player, data, full_height)
 	end
 

tests/test_tabs.lua

@@ -16,30 +16,18 @@ i3.new_tab("test2", {
 	end,
 })
 
-i3.new_tab("test3", {
-	description = "Test 3",
+i3.new_tab("test_creative", {
+	description = "Test creative",
 
 	access = function(player, data)
 		local name = player:get_player_name()
-		if name == "singleplayer" then
-			return true
-		end
+		return core.is_creative_enabled(name)
 	end,
 
 	formspec = function(player, data, fs)
-		fs("label[3,1;Test 3]")
+		fs("label[3,1;Creative enabled]")
 	end,
 
-	fields = function(player, data, fields)
-		i3.set_fs(player, "label[3,2;Test extra_fs]")
-	end,
+	fields = i3.set_fs,
 })
 
-i3.override_tab("test2", {
-	description = "Test override",
-	image = "i3_mesepick.png",
-
-	formspec = function(player, data, fs)
-		fs("label[3,1;Override!]")
-	end,
-})