Method findMessages

app/src/main/java/eu/faircode/email/Core.java:930–964

(Context context, EntityFolder folder, List<EntityMessage> messages, POP3Store istore, POP3Folder ifolder)

    }

    private static Map<EntityMessage, Message> findMessages(Context context, EntityFolder folder, List<EntityMessage> messages, POP3Store istore, POP3Folder ifolder) throws MessagingException, IOException {
        Map<String, String> caps = istore.capabilities();
        boolean hasUidl = caps.containsKey("UIDL");

        Message[] imessages = ifolder.getMessages();

        if (hasUidl) {
            FetchProfile ifetch = new FetchProfile();
            ifetch.add(UIDFolder.FetchProfileItem.UID);
            ifolder.fetch(imessages, ifetch);
        }

        Map<EntityMessage, Message> result = new HashMap<>();

        for (EntityMessage message : messages) {
            result.put(message, null);
            Log.i(folder.name + " POP searching for=" + message.uidl + "/" + message.msgid +
                    " messages=" + imessages.length + " uidl=" + hasUidl);

            for (Message imessage : imessages) {
                MessageHelper helper = new MessageHelper((MimeMessage) imessage, context);

                String uidl = (hasUidl ? ifolder.getUID(imessage) : null);
                String msgid = (TextUtils.isEmpty(uidl) ? helper.getPOP3MessageID() : null);

                if ((uidl != null && uidl.equals(message.uidl)) ||
                        (msgid != null && msgid.equals(message.msgid))) {
                    Log.i(folder.name + " POP found=" + uidl + "/" + msgid);
                    result.put(message, imessage);
                }
            }
        }

        return result;
    }

    private static void onSetFlag(Context context, JSONArray jargs, EntityFolder folder, List<EntityMessage> messages, IMAPFolder ifolder, Flags.Flag flag) throws MessagingException, JSONException {
        // Mark message (un)seen