Spark keeps history of all messages in the ~/.Spark/user/user@example.com/transcripts/ folder.
Although there is no way to view the entire history in the application itself.
We added this functionality in Unite2. This new window is similar to Pidgin’s one.
This window allows to view the messages grouped by the date tag as well as search the text.
Please see some screenshot below.
Also I attached the patch.
To me it could be handy for users.
Please let me know what do you think about this functionality.