1 files changed, 62 insertions, 0 deletions
diff --git a/pkgs/astal/src/lib.lua b/pkgs/astal/src/lib.lua
index 71a6c65..7fa326a 100644
--- a/pkgs/astal/src/lib.lua
+++ b/pkgs/astal/src/lib.lua
@@ -2,6 +2,7 @@ local astal = require("astal")
 local Variable = require("astal").Variable
 local Astal = require("astal.gtk3").Astal
 local GLib = astal.require("GLib")
+local Gtk = require("astal.gtk3").Gtk
 
 local lib
 
@@ -149,6 +150,67 @@ lib = {
 		}, t or {})
 		return GLib.DateTime.new_from_unix_local(t.time):format(t.format)
 	end,
+
+	--- astal variable map
+	varmap = function(initial)
+		local map = initial
+		local var = Variable()
+
+		local function notify()
+			local arr = {}
+			for _, value in pairs(map) do
+				table.insert(arr, value)
+			end
+			var:set(arr)
+		end
+
+		local function delete(key)
+			if Gtk.Widget:is_type_of(map[key]) then map[key]:destroy() end
+
+			map[key] = nil
+		end
+
+		notify()
+
+		return setmetatable({
+			set = function(key, value)
+				delete(key)
+				map[key] = value
+				notify()
+			end,
+			delete = function(key)
+				delete(key)
+				notify()
+			end,
+			get = function()
+				return var:get()
+			end,
+			subscribe = function(callback)
+				return var:subscribe(callback)
+			end,
+		}, {
+			__call = function() return var() end,
+		})
+	end,
+
+	--- better or function
+	value_or = function(l, r)
+		if lib.is_true(l) then
+			return l
+		else
+			return r
+		end
+	end,
+
+	--- better and function
+	value_and = function(l, r)
+		if lib.is_false(l) then
+			return l
+		else
+			return r
+		end
+	end,
+
 }
 
 return lib