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package de.thedevstack.conversationsplus.utils;

import android.net.Uri;

import de.thedevstack.conversationsplus.ConversationsPlusApplication;
import de.thedevstack.conversationsplus.exceptions.FileCopyException;

import eu.siacs.conversations.crypto.PgpEngine;
import eu.siacs.conversations.entities.Conversation;
import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.persistance.FileBackend;
import eu.siacs.conversations.ui.UiCallback;
import eu.siacs.conversations.utils.FileUtils;

/**
 * Utility class to work with conversations.
 */
public class ConversationUtil {

    public static void attachLocationToConversation(final Conversation conversation,
                                             final Uri uri,
                                             final UiCallback<Message> callback) {
        int encryption = conversation.getNextEncryption();
        if (encryption == Message.ENCRYPTION_PGP) {
            encryption = Message.ENCRYPTION_DECRYPTED;
        }
        Message message = new Message(conversation, uri.toString(), encryption);
        if (conversation.getNextCounterpart() != null) {
            message.setCounterpart(conversation.getNextCounterpart());
        }
        if (encryption == Message.ENCRYPTION_DECRYPTED) {
            PgpEngine.getInstance().encrypt(message, callback);
        } else {
            callback.success(message);
        }
    }

    public static void attachFileToConversation(final Conversation conversation,
                                         final Uri uri,
                                         final UiCallback<Message> callback) {
        final Message message;
        if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
            message = new Message(conversation, "", Message.ENCRYPTION_DECRYPTED);
        } else {
            message = new Message(conversation, "", conversation.getNextEncryption());
        }
        message.setCounterpart(conversation.getNextCounterpart());
        message.setType(Message.TYPE_FILE);
        String path = FileUtils.getPath(uri);
        if (path != null) {
            message.setRelativeFilePath(path);
            MessageUtil.updateFileParams(message);
            if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
                PgpEngine.getInstance().encrypt(message, callback);
            } else {
                callback.success(message);
            }
        } else {
            ConversationsPlusApplication.executeFileAdding(new Runnable() {
                @Override
                public void run() {
                    try {
                        FileBackend.copyFileToPrivateStorage(message, uri);
                        MessageUtil.updateFileParams(message);
                        if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
                            PgpEngine.getInstance().encrypt(message, callback);
                        } else {
                            callback.success(message);
                        }
                    } catch (FileCopyException e) {
                        callback.error(e.getResId(), message);
                    }
                }
            });
        }
    }
}