Make default notification template configurable

Closes #29
Fixes #24

Co-authored-by: noantiq <timucin.boldt@udo.edu>

base-config.yaml

@@ -8,6 +8,8 @@ spam_sleep: 2
 # The prefix for all commands
 # It has to be prefixed with ! in matrix to be recognised
 command_prefix: "rss"
+# Default post notification template for new subscriptions
+notification_template: "New post in $feed_title: [$title]($link)"
 # Users who can bypass room permission checks
 admins:
 - "@user:example.com"

rss/bot.py

@@ -51,6 +51,7 @@ class Config(BaseProxyConfig):
         helper.copy("max_backoff")
         helper.copy("spam_sleep")
         helper.copy("command_prefix")
+        helper.copy("notification_template")
         helper.copy("admins")
 
 
@@ -360,7 +361,9 @@ class RSSBot(Plugin):
             )
             await evt.reply(f"{subscriber} had already subscribed this room to {feed_info}")
         else:
-            await self.dbm.subscribe(feed.id, evt.room_id, evt.sender)
+            await self.dbm.subscribe(
+                feed.id, evt.room_id, evt.sender, self.config["notification_template"]
+            )
             await evt.reply(f"Subscribed to {feed_info}")
 
     @rss.subcommand(