add save and load to file

main.lua

@@ -33,19 +33,14 @@ end
 local function main()
 	local main_view = require("views.main")
 
-	local bundles = {
-		green = {
-			["minecraft:kelp"] = 64,
-			["minecraft:grass_block"] = 64
-		},
-		terraform = {
-			["minecraft:grass_block"] = 64,
-			["minecraft:stone"] = 64,
-			["#green"] = 1
-		}
-	}
-	local inventories = list_inventories()
-	main_view:prepare(inventories, bundles, "minecraft:barrel_4")
+	local save_file = "/storage-config.txt"
+	if fs.exists(save_file) then
+		main_view:load_from_file(save_file)
+	else
+		local inventories = list_inventories()
+		main_view:prepare(inventories, {}, "minecraft:barrel_4")
+	end
+	main_view.save_file = save_file
 
 	local update_interval = 0.1
 	local update_timer = os.startTimer(update_interval)

views/main.lua

@@ -296,6 +296,29 @@ function main_view:prepare(inventories, bundles, result_inventory)
 	end
 end
 
+function main_view:save_to_file(filename)
+	local f, err = io.open(filename, "w")
+	if not f then return nil, err end
+
+	f:write(textutils.serialise{
+		inventories = self.inventories,
+		bundles = self.bundles,
+		result_inventory = self.result_inventory
+	})
+
+	f:close()
+end
+
+function main_view:load_from_file(filename)
+	local f, err = io.open(filename, "r")
+	if not f then return nil, err end
+
+	local data = textutils.unserialise(f:read("a"))
+
+	main_view:prepare(data.inventories, data.bundles, data.result_inventory)
+
+	f:close()
+end
 
 
 
@@ -589,6 +612,10 @@ function main_view:save_bundle(name, items, bundles)
 	self.left_store.bundles = derive_available_bundles(self.left_store.items, self.bundle_details)
 	self:refresh_filtered_names(self.left_store, self.left_area)
 
+	if self.save_file then
+		self:save_to_file(self.save_file)
+	end
+
 	return true
 end