This commit adds a 'skip-delay' option to the
'send_zulip_update_announcements' management command.
It will be useful for self-hosted servers after 9.0 upgrade to
avoid the 24 hour delay to receive update messages after group
DM is sent to the admins.
One can run the management command with the --skip-delay flag
to immediately send the update messages.
For organizations with "Zulip update announcements" stream set
to a default value, we wait for one day after sending group
DM to admins to allow them to change the stream from it's
default value if they wish to.
This prep commit refactors the function
'is_group_direct_message_sent_to_admins_atleast_one_week_ago' to
'is_group_direct_message_sent_to_admins_within_days' allowing us
to use a flexible timeframe instead of hardcoded 1 week.
We will reuse this function as a part of determinig whether
group DM to admins was sent within 1 day.
For multiline strings in triple quotes, a '\n' is included
at the end of each line.
Earlier, to skip '\n' we used to add an escape character '\'
at the end of each line.
This commit adds a function to avoid manually adding '\'.
As a part of the zulip news feature, we send an initial
group DM to admins suggesting them to update or set
the 'zulip_update_announcements_stream'.
This commit updates those messages to make it better.
This commit adds a management command that will run regularly
as a cron job to send zulip updates to realms based on their
current and latest zulip_update_announcements_level.
For realms with:
* level = None: Send a group DM to admins notifying them about
this new feature & suggestion to set the stream accordingly.
* level = 0:
* If stream is still not configured, wait for a week
before setting their level to latest level. They will
miss updates until their configure the stream.
* If stream is configured, send updates.
* level > 0: Send one message/update per level & increase
the level by 1 till the latest level.
Fixes#28604.