edit-message: Show error dialog on edit-message request error #1792
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I'm fairly certain this is NFC. The two calls do operate on shared state, in the controller, but it should suffice to just capture `messageId` and `newContent` from the ComposeBoxController before endMessageEdit disposes it. Soon we'd like `store.editMessage` to return a Future, which we'd like to await and add some error feedback, just like we have in the send-message UX.
See added dartdoc for motivation. I don't think there's a behavior change here; we don't use the passed BuildContext after an async gap. We'd like to do that soon, though: to show an error dialog on API errors from the edit-message request; such errors will arrive after the banner has disappeared.
I'm not finding the discussion where we said we wanted this (for consistency with the send-message UX), but I think we did. Error-feedback logic copied from the tap-"Send" button (_SendButtonState._send) modulo the error dialog's title, "Message not saved" vs. "Message not sent".
chrisbobbe
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With #188, the message-list UI for an unsubscribed channel will become more prominent, which calls for fixing at least the following glitch:
Since we don't get events when the self-user sends or edits a message in an unsubscribed channel, we'd like to refetch messages on success of those actions. Discussion: #mobile > Message sending in unsubscribed channels @ 💬 So, on the path to that, make
store.editMessagesimilar tostore.sendMessagein returningFuture<void>instead ofvoid, where the returned Future resolves or rejects with the API request, irrespective of the event.While we're at it, show an error dialog when the edit fails, as we've been meaning to do, again for consistency with the send-message UX.
Compare error feedback on sending an invalid message (in
mainand unchanged here) vs. trying to save an invalid message edit (new here; inmainwe show no dialog):The outbox logic is unchanged. As in
main, we show "MESSAGE NOT SENT" and "EDIT NOT SAVED" in the message list, and these are tappable to restore the composing session and try again.