The reason for this change is that, this is where `Filter` and
actual tracking of what messages are contiguous lives. This
will be beneficial when we will to move to a model where we
cache `MessageListData` objects for a large number of views.
This adds a way to keep track of max_message_id of a
stream and fetch it using the method get_max_message_id().
This will be useful for sorting streams by most recent
activity which will be implemented in the upcoming commit.
Essentially rewritten by tabbott to have a coherent tracking system,
and provide documentation.
Part of #10794.
In ee0d4541b4, we renamed the topic_date
-> stream_topic_history, and in the process renamed some local object
properties from .name => .topic_name, and accidentally change the
type for the data from the server as well.
The test fixtures were incorrectly migrated in the same way, so we fix
that as well.
`stream_topic_history` is a more appropriate name as this
module will contain information about last message of a
stream in upcoming commits. Function and variable names
are changed accordingly like:
* topic_history() -> per_stream_history()
* get_recent_names() -> get_recent_topic_names()
* name -> topic_name
Anders Kaseorg
Tim Abbott
Ryan Rehman
Hashir Sarwar
Tim Abbott