Initial commit (version 0.1-test)

mods/elevator/persistence.lua

@@ -0,0 +1,35 @@
+local S = minetest.get_translator("elevator")
+
+local mod_data_path = minetest.get_worldpath() .. "/mod_elevator.data"
+
+-- called whenever a station is added or removed
+function elevator.save_data()
+	local data = minetest.serialize(elevator.targets)
+
+	local success = minetest.safe_file_write(mod_data_path, data)
+	if not success then
+		print(S("[Mod elevator] Error: Savefile '@1' could not be written.", mod_data_path))
+	end
+end
+
+
+function elevator.restore_data()
+	local file = io.open(mod_data_path, "r")
+	if not file then
+		print(S("[Mod elevator] Error: Savefile '@1' not found.", mod_data_path))
+		return
+	end
+
+	local data = file:read("*all")
+	elevator.targets = minetest.deserialize(data)
+
+	if not elevator.targets then
+		local backup_file = mod_data_path .. ".bak"
+		print(S("[Mod elevator] Error: Savefile '@1' is damaged." .. " " ..
+				"Saved the backup as '@2'.", mod_data_path, backup_file))
+
+		minetest.safe_file_write(backup_file, data)
+		elevator.targets = {}
+	end
+	file:close()
+end