Threading still doesn't work for some messages. To debug this more
easily, especially for non devs, this adds a new action menu entry to
download all relevant threading data as a simple JSON. The maintainers
can then look at those files, put them into unit tests and see why they
messages don't group.

Again, this entry won't be shown on production instances but only if
debug mode is enabled.

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

The front-end asks for the thread of a message by sending the message
ID. Now, after an upgrade from v1.4.x to v1.5 and no sync of the
mailbox, the `thread_root_id` will still be `NULL`, hence we can't find
related messages this way. But we don't have to look it up that way, we
can also allow matching by the ID.

This safes me from coming up with a complicated strategy to force a
resync after the upgrade. Messages will be able to show. The threads
will build deferred.

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Julius Härtl <jus@bitgrid.net>

Signed-off-by: Joas Schilling <coding@schilljs.com>

It returns DB messages, not IMAP messages.

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

This caused two bugs
* Reply all did not work (the account lookup failed because `undefined`
  was used as ID)
* The preselected account in the reply composer was not automatically
  set to the one from the original message

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Co-authored-by: Christoph Wurst <christoph@winzerhof-wurst.at>
Signed-off-by: Holger Dehnhardt <holger@dehnhardt.org>
Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: GretaD <gretadoci@gmail.com>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: GretaD <gretadoci@gmail.com>

The sync was comparing IDs with message UIDs, hence it occasionally told
the client that all known messages vanished. On the next sync request it
said everything that just vanished was suddenly a new message.

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Before it always returned $limit results but nothing more. Now it will
give back the actual page and a cursor, so the rest can be fetched in
consecutive search requests.

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Julius Härtl <jus@bitgrid.net>

Signed-off-by: GretaD <gretadoci@gmail.com>
Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Added sender without mail check to the prepare functions of RepliedMessagesExtractor and SentMessagesExtractor

Signed-off-by: Patrick Bender <patrick@bender-it-services.de>

Signed-off-by: Patrick Bender <patrick@bender-it-services.de>

Signed-off-by: Patrick Bender <patrick@bender-it-services.de>

Signed-off-by: Patrick Bender <patrick@ichbinkeinreh.de>

Signed-off-by: Patrick Bender <patrick@ichbinkeinreh.de>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

* ID is supposed to be the database ID
* UID is the IMAP UID
* UUID is the globally unique identifier used in the front-end

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Patrick Bender <patrick@bender-it-services.de>

Fixed eslint errors and php-cs check errors

Signed-off-by: Patrick Bender <patrick@bender-it-services.de>

Second round of eslint and php-cs check fixes

Signed-off-by: Patrick Bender <patrick@bender-it-services.de>

Reverted translation changes and applied PR suggestions to Alias.php

Signed-off-by: Patrick Bender <patrick@bender-it-services.de>

Implemented design suggestions. Changed code to now use await/async

Signed-off-by: Patrick Bender <patrick@bender-it-services.de>

Changed aliases to not include a full copy of the account object

Signed-off-by: Patrick Bender <patrick@bender-it-services.de>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Benedikt Merz <benedikt.merz@web.de>

Log level for 'not enough messages to train a classifier' changed from warning to info.
See discussion on Nextcloud forum:
https://help.nextcloud.com/t/log-entry-not-enough-messages-to-train-a-classifier/85174

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>