DB path and type config

bot.py

@@ -17,7 +17,10 @@ import timeout as tmo
 
 
 # TODO more backends (redis at least)
-db = db_classes.PickleDB(".db")
+db = {
+    "pickle": db_classes.PickleDB,
+    # "redis": db_classes.RedisDB,
+}.get(cr.read("settings.db_type"))(cr.read("settings.db_path"))
 db.load()
 CURRENT_VERSION = "v1.0rc9"
 VERSION = db.read("about.version", CURRENT_VERSION)
@@ -1409,6 +1412,7 @@ def update(forum: int) -> None:
 
 def update_notify(forum: int) -> None:
     "Notifies the forum about bot's new version."
+    # TODO changelog
     bot.reply_to(
         get_chat(forum),
         f"Обновился до версии {telebot.formatting.escape_markdown(CURRENT_VERSION)}",

config.example.ini

@@ -7,4 +7,6 @@
 prod  = 0000000000:ooooooooooooooooooooooooooooooooooo
 
 [settings]
-notify_period = 120
+notify_period = 120
+db_type = pickle
+db_path = .db

config_reader.py

@@ -10,6 +10,15 @@ FIELDS = {
     "tokens.prod": (str, "" if __debug__ else None, None),
     "tokens.devel": (str, None if __debug__ else "", None),
     "settings.notify_period": (int, 120, None),
+    "settings.db_path": (str, ".db", None),
+    "settings.db_type": (
+        str,
+        None,
+        (
+            "pickle",
+            # "redis",
+        ),
+    ),
 }
 
 CONFIG_FILENAME = "config.ini"