1 files changed, 46 insertions, 0 deletions
diff --git a/src/home/database/simple_state.py b/src/home/database/simple_state.py
new file mode 100644
index 0000000..cada9c8
--- /dev/null
+++ b/src/home/database/simple_state.py
@@ -0,0 +1,46 @@
+import os
+import json
+import atexit
+
+
+class SimpleState:
+    def __init__(self,
+                 file: str,
+                 default: dict = None,
+                 **kwargs):
+        if default is None:
+            default = {}
+        elif type(default) is not dict:
+            raise TypeError('default must be dictionary')
+
+        if not os.path.exists(file):
+            self._data = default
+        else:
+            with open(file, 'r') as f:
+                self._data = json.loads(f.read())
+
+        self._file = file
+        atexit.register(self.__cleanup)
+
+    def __cleanup(self):
+        if hasattr(self, '_file'):
+            with open(self._file, 'w') as f:
+                f.write(json.dumps(self._data))
+        atexit.unregister(self.__cleanup)
+
+    def __del__(self):
+        if 'open' in __builtins__:
+            self.__cleanup()
+
+    def __getitem__(self, key):
+        return self._data[key]
+
+    def __setitem__(self, key, value):
+        self._data[key] = value
+
+    def __contains__(self, key):
+        return key in self._data
+
+    def __delitem__(self, key):
+        if key in self._data:
+            del self._data[key]