store font size in settings file

settingsstore.py

@@ -0,0 +1,36 @@
+import os
+from typing import Callable
+
+from settings import Settings
+from pathlib import Path
+from os.path import join, isfile
+from configparser import ConfigParser
+
+
+class SettingsStore():
+    def __init__(self):
+        pass
+
+    @staticmethod
+    def _config_file() -> str:
+        return join(Path.home(), ".ravenlog", "settings.ini")
+
+    @staticmethod
+    def load() -> Settings:
+        config_file = SettingsStore._config_file()
+        config = ConfigParser()
+
+        # apply default settings
+        config.add_section('general')
+        config.set('general', 'font_size', '12')
+        config.read(config_file)
+
+        return Settings(config)
+
+    @staticmethod
+    def save(settings: Settings):
+        config_file = SettingsStore._config_file()
+        dir = os.path.dirname(config_file)
+        os.makedirs(dir, exist_ok=True)
+        with open(config_file, 'w+') as fp:
+            settings.config.write(fp)