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imap: fetch Inbox before scanning other folders

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link2xt
2022-01-30 23:05:39 +00:00
committed by bjoern
parent 7eadca3959
commit f304a30193
3 changed files with 36 additions and 16 deletions
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43
src/scheduler.rs
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@@ -169,25 +169,42 @@ async fn fetch_idle(ctx: &Context, connection: &mut Imap, folder: Config) -> Int
warn!(ctx, "{:#}", err);
}
// Scan other folders before fetching from watched folder. This may result in the
// messages being moved into the watched folder, for example from the Spam folder to
// the Inbox folder.
if folder == Config::ConfiguredInboxFolder {
// Only scan on the Inbox thread in order to prevent parallel scans, which might lead to duplicate messages
if let Err(err) = connection.scan_folders(ctx).await {
// Don't reconnect, if there is a problem with the connection we will realize this when IDLEing
// but maybe just one folder can't be selected or something
warn!(ctx, "{}", err);
}
}
// fetch
// Fetch the watched folder.
if let Err(err) = connection.fetch_move_delete(ctx, &watch_folder).await {
connection.trigger_reconnect(ctx).await;
warn!(ctx, "{:#}", err);
return InterruptInfo::new(false);
}
// Scan additional folders only after finishing fetching the watched folder.
//
// On iOS the application has strictly limited time to work in background, so we may not
// be able to scan all folders before time is up if there are many of them.
if folder == Config::ConfiguredInboxFolder {
// Only scan on the Inbox thread in order to prevent parallel scans, which might lead to duplicate messages
match connection.scan_folders(ctx).await {
Err(err) => {
// Don't reconnect, if there is a problem with the connection we will realize this when IDLEing
// but maybe just one folder can't be selected or something
warn!(ctx, "{}", err);
}
Ok(true) => {
// Fetch the watched folder again in case scanning other folder moved messages
// there.
//
// In most cases this will select the watched folder and return because there are
// no new messages. We want to select the watched folder anyway before going IDLE
// there, so this does not take additional protocol round-trip.
if let Err(err) = connection.fetch_move_delete(ctx, &watch_folder).await {
connection.trigger_reconnect(ctx).await;
warn!(ctx, "{:#}", err);
return InterruptInfo::new(false);
}
}
Ok(false) => {}
}
}
// Synchronize Seen flags.
if let Err(err) = connection
.sync_seen_flags(ctx, &watch_folder)