Hello, I'd like to implement an "undelete" functionality in my client when "trash folder" model is used. IOW if the user accidentally deletes a message which means that it's copied to the trash and then deleted and expunged from the current mailbox, I'd like to allow undeleting it, i.e. copy it back from the trash (probably also deleting it from there but this is not crucial) to the current folder.
Unfortunately I don't see any efficient way to do it because, AFAICS, if I use mail_copy() I can't get the UID of the new message(s) in the trash and so I don't know how to find them there when I need to copy them back. I do know their MSGNO (they're the last messages in the trash) but it seems unwise to rely on this as the trash could be modified between delete and the undelete operations making them invalid (granted, the same could happen with UIDs too if the UID validity changes but this should be so rare that I feel safe ignoring this problem). So far I see 3 solutions neither of which I really like: 1. Get the message text and store it locally. Then when I need to undelete it, use mail_append() to recreate it instead of copying it back from trash. The problem here is, of course, that I need to download a possibly huge message from the server every time I delete anything even though I'll very rarely need this text later (as undeleting is rare). 2. Open trash folder and find the UIDs of the new messages when they're appended to it. The problem is that opening the trash takes time too especially as it usually has a lot of messages in it (mine is ~200000). Appending to it is fast enough so it's not a problem but opening it every time certainly would be. So I guess I'd just need to keep it opened all the time but I'm not sure if it's a good idea. 3. Don't delete the messages on IMAP server at all when they're deleted but just remember this internally and filter the message listing in the client itself to hide them from user. Then finally delete and expunge them when the mailbox is closed. This seems the most efficient way to do it but also very complex and so likely error-prone and it just seems a bit stupid to not user server support for this. Am I missing some other, better, way? Right now I plan to go with (1) because normally you don't delete messages without reading them so hopefully the text had already been downloaded (there is another command for marking messages as spam so this wouldn't be done for spam). But I'd like to avoid this if possible. Thanks in advance for any ideas, VZ
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