wip persistent storage

libs/persistent-storage.lua

@@ -0,0 +1,22 @@
+local id = ...
+local deflate = dofile("libs/deflate.lua")
+local filepath = fs.combine("/persisted-data",id)
+local expect = dofile("rom/modules/main/cc/expect.lua")
+local expect, field = expect.expect, expect.field
+local lib={}
+function lib.load()
+    if fs.exists(filepath) then
+        local file = fs.open(filepath,"r")
+        local data = textutils.unserialise(deflate:DecompressDeflate(file.readAll()))
+        file.close()
+        return data
+    else
+        return {}
+    end
+end
+function lib.save(data)
+    expect(1,data,"table")
+    local file = fs.open(filepath,"w")
+    file.write(deflate:CompressDeflate(textutils.serialise(data),{level=8}))
+end
+return lib