[imp] Shift-delete feature request

[Jan Schneider]

Zitat von Jens Wahnes <wahnes at uni-koeln.de>:

> On Fri, Nov 27 2015, at 11:04:08 +0100, Simon B wrote:
>
>> It's odd, because I thought I had advanced settings shown by default.
>
> AFAIK, showing the advanced prefs can only be enabled for a specific
> session, but not permanently.
>
>> However, I'd still like the ability to permanently delete mail from any
>> folder.
>
> All I can say about that it that from my point of view, that feature is
> difficult to implement, because it would require one to *reliably*
> (re-)set the flags of potentially many mails in a folder since IMAP
> does not allow the deletion of a single arbitrary message per se.  So
> it can only be done by emulating this, i.e. removing any "deleted"
> flags present, flagging the message in question as deleted, doing
> EXPUNGE (or CLOSE, for that matter) and resetting all message flags
> removed previously.  Since there can be several IMAP clients active on
> a mailbox at any given time, it would be very hard to get this right
> since these operations are not atomic.  That's true especially if you
> consider that there could be trouble with the imap connection in
> between the commands required to do this, so this might require to
> implement some "to do list" of IMAP commands that would need to be
> (reliably) stored somewhere until the connection to the IMAP server can
> be re-established.  In essence, I would not consider the effect of this
> worth the effort needed.
>
>
> Jens

You can expunge individual messages too, and we already have a method  
argument in IMP's API to delete and purge individual message. So it  
should be rather simple to implement (keyhandler, AJAX API method,  
help text).

-- 
Jan Schneider
The Horde Project
http://www.horde.org/