add: polls backend

TODO: polls frontend

crates/core/src/database/auth.rs

@@ -358,6 +358,24 @@ impl DataManager {
             return Err(Error::DatabaseError(e.to_string()));
         }
 
+        // delete polls
+        let res = execute!(&conn, "DELETE FROM polls WHERE owner = $1", &[&(id as i64)]);
+
+        if let Err(e) = res {
+            return Err(Error::DatabaseError(e.to_string()));
+        }
+
+        // delete poll votes
+        let res = execute!(
+            &conn,
+            "DELETE FROM pollvotes WHERE owner = $1",
+            &[&(id as i64)]
+        );
+
+        if let Err(e) = res {
+            return Err(Error::DatabaseError(e.to_string()));
+        }
+
         // delete user follows... individually since it requires updating user counts
         for follow in self.get_userfollows_by_receiver_all(id).await? {
             self.delete_userfollow(follow.id, &user, true).await?;