Method expunge

app/src/main/java/eu/faircode/email/Core.java:5372–5420

(Context context, IMAPFolder ifolder, List<Message> messages)

    }

    private static boolean expunge(Context context, IMAPFolder ifolder, List<Message> messages) {
        if (messages.size() == 0)
            return false;

        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
        boolean perform_expunge = prefs.getBoolean("perform_expunge", true);
        boolean uid_expunge = prefs.getBoolean("uid_expunge", false);

        if (!perform_expunge)
            return false;

        try {
            if (uid_expunge)
                uid_expunge = MessageHelper.hasCapability(ifolder, "UIDPLUS");
            if (MessageHelper.hasCapability(ifolder, "X-UIDONLY"))
                uid_expunge = true;

            if (uid_expunge) {
                FetchProfile fp = new FetchProfile();
                fp.add(UIDFolder.FetchProfileItem.UID);
                ifolder.fetch(messages.toArray(new Message[0]), fp);

                List<Long> uids = new ArrayList<>();
                for (Message m : messages)
                    try {
                        long uid = ifolder.getUID(m);
                        if (uid < 0)
                            continue;
                        uids.add(uid);
                    } catch (MessageRemovedException ex) {
                        Log.w(ex);
                    }

                Log.i(ifolder.getName() + " expunging " + TextUtils.join(",", uids));
                uidExpunge(context, ifolder, uids);
                Log.i(ifolder.getName() + " expunged " + TextUtils.join(",", uids));
            } else {
                Log.i(ifolder.getName() + " expunging all=" + messages.size());
                ifolder.expunge();
                Log.i(ifolder.getName() + " expunged all=" + messages.size());
            }

            return true;
        } catch (MessagingException ex) {
            // NO EXPUNGE failed.
            Log.w(ex);
            return false;
        }
    }

    private static void uidExpunge(Context context, IMAPFolder ifolder, List<Long> uids) throws MessagingException {
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);