fix no sent mailbox configured

[hamza221]

Fix #4153
Repro:

1. remove the default folder for sent ("you can do it in vuex by setting sentMailboxId to null")
2. Try to send a message

Fix:
Ps: Other ideas are appreciated

1. Check if a mailbox named Sent or equivalent in the local language

• if it exists set it as Sent default folder and resend message, if not:

2. create a new mailbox
3. set it as send default folder
4. resend the message
5. Catch exceptions and inform the user with toasts accordingly

[JohannesGGE]

Where exactly do you set sentMailboxId to null? (I can't get the error reproduced)

[hamza221]

Where exactly do you set sentMailboxId to null? (I can't get the error reproduced)

I do it in the vue.js devtools browser extension

[ChristophWurst]

The changes feel a bit too complex and messy. I think we should try to find a cleaner, less complicated spot to place the logic. I'll think about an alternative.

[ChristophWurst]

The changes feel a bit too complex and messy. I think we should try to find a cleaner, less complicated spot to place the logic. I'll think about an alternative.

How about we just move the logic into the head of NewMessageModal::onSend? We have access to the accountId and can fetch the account, check for the mailbox existence and act, then proceed with the usual send logic.

The good news is that this isn't too far off the current state. The code just has to be pushed around a bit.

I also think we don't necessarily need a special loading text for this state. For the user it's sufficient if we show Sending … while creating/assigning the mailbox

[ChristophWurst]

The logical flow looks good otherwise

[ChristophWurst]

nit. first look for the localized, then search for Sent. this ensures that the localized takes priority.

[ChristophWurst]

I'm missing a return or anything else that leaves this method after setting the existing mailbox

[ChristophWurst]

if the IMAP server supports it (likely) we should also set the specialuse attribute to \sent