The limit on the number of jobs executed in a row was introduced to
prevent large queues of small jobs like MarkseenMsgOnImap, MoveMsg and
DeleteMsgOnImap from delaying message fetching. Since all these jobs
are now removed and IMAP operations they did are now batched, it is
impossible to have 20 or more queued IMAP jobs.
When removing an account, try 60 times with 1 second sleep in between
in case removal of database files fails. This happens on Windows
platform sometimes due to a known bug in r2d2 which may result in 30
seconds delay until all connections are closed [1].
[1] https://github.com/sfackler/r2d2/issues/99
MarkseenMsgOnImap job, that was responsible for marking messages as
seen on IMAP and sending MDNs, has been removed.
Messages waiting to be marked as seen are now stored in a
single-column imap_markseen table consisting of foreign keys pointing
to corresponding imap table records.
Messages are marked as seen in batches in the inbox loop. UIDs are
grouped by folders to reduce the number of requests, including folder
selection requests. UID grouping logic has been factored out of
move_delete_messages into UidGrouper iterator to avoid code duplication.
Messages are marked as seen right before fetching from the inbox
folder. This ensures that even if new messages arrive into inbox while
the connection has another folder selected to mark messages there, all
messages are fetched before going IDLE. Ideally marking messages as
seen should be done after fetching and moving, as it is a low-priority
task, but this requires skipping IDLE if UIDNEXT has advanced since
previous time inbox has been selected. This is outside of the scope of
this change.
MDNs are now queued independently of marking the messages as seen.
SendMdn job is created directly rather than after marking the message
as seen on IMAP. Previously sending MDNs was done in MarkseenMsgOnImap
avoid duplicate MDN sending by setting $MDNSent flag together with
\Seen flag and skipping MDN sending if the flag is already set. This
is not the case anymore as $MDNSent flag support has been removed in
9c077c98cd and duplicate MDN sending in
multi-device case is avoided by synchronizing Seen status since
833e5f46cc as long as the server
supports CONDSTORE extension.
* show 'Not connected' if storage information are not yet available
'One moment' is a bit misleading in case the device is offline
as it will take more than a moment until that will be updated :)
* update CHANGELOG
this bypasses the replication safety introduced by letting the caller track the last serial,
however, in case of bots that do not track much state and do not playback updates anyway,
it is still useful.
at least on iOS we would need to inject a script to force a behavior,
that is hard to merge with settings set by the Webxdc.
therefore, the easiest approach seems to be to leave that completely up to the Webxdc -
and, in practise, many Webxdc already set viewports, including scaling.
There is very little to be gained by having to approve those PRs, and
it is a lot of UI interaction to get them approved.
They still will need to be merged manually regardless, so they might
as well be approved by a bot.
* make Connectivity-View-HTML not scalable
in practise, Android and Desktop already disallow scaling
by some other methods,
however, for iOS this is needed as we otherwise
have to do far more complicated things as drafted at
https://github.com/deltachat/deltachat-ios/pull/1531/files
* update CHANGELOG
