Modularized JSON storage

user_template and other files are now accessed via JSONStorage, which
has dictionary like attributes for each file which can be used like a
dictionary, without the need to manually read and write the file. This
was done so that other storage types (e.g a database) can be added in
future.

jellyfin_accounts/data_store.py

@@ -0,0 +1,66 @@
+import json
+import datetime
+
+class JSONFile(dict):
+    @staticmethod
+    def readJSON(path):
+        try:
+            with open(path, 'r') as f:
+                return json.load(f)
+        except FileNotFoundError:
+            return {}
+    
+    @staticmethod
+    def writeJSON(path, data):
+        with open(path, 'w') as f:
+            return f.write(json.dumps(data, indent=4, default=str))
+    
+    def __init__(self, path, data=None):
+        self.path = path
+        if data is None:
+            super(JSONFile, self).__init__(self.readJSON(self.path))
+        else:
+            super(JSONFile, self).__init__(data)
+            self.writeJSON(self.path, data)
+
+    def __getitem__(self, key):
+        super(JSONFile, self).__init__(self.readJSON(self.path))
+        return super(JSONFile, self).__getitem__(key)
+
+    def __setitem__(self, key, value):
+        data = self.readJSON(self.path)
+        data[key] = value
+        self.writeJSON(self.path, data) 
+        super(JSONFile, self).__init__(data)
+
+    def __delitem__(self, key):
+        data = self.readJSON(self.path)
+        super(JSONFile, self).__init__(data)
+        del data[key]
+        self.writeJSON(self.path, data) 
+        super(JSONFile, self).__delitem__(key)
+
+    def __str__(self):
+        super(JSONFile, self).__init__(self.readJSON(self.path))
+        return json.dumps(super(JSONFile, self))
+
+
+class JSONStorage:
+    def __init__(self,
+                 emails,
+                 invites,
+                 user_template,
+                 user_displayprefs,
+                 user_configuration):
+        self.emails = JSONFile(path=emails)
+        self.invites = JSONFile(path=invites)
+        self.user_template = JSONFile(path=user_template)
+        self.user_displayprefs = JSONFile(path=user_displayprefs)
+        self.user_configuration = JSONFile(path=user_configuration)
+    
+    def __setattr__(self, name, value):
+        if hasattr(self, name):
+            path = self.__dict__[name].path
+            self.__dict__[name] = JSONFile(path=path, data=value)
+        else:
+            self.__dict__[name] = value