Update Dialer source from latest green build.

* Refactor voicemail component
* Add new enriched calling components

Test: treehugger, manual aosp testing

Change-Id: I521a0f86327d4b42e14d93927c7d613044ed5942

1 files changed, 0 insertions, 711 deletions

diff --git a/java/com/android/voicemailomtp/imap/ImapHelper.java b/java/com/android/voicemailomtp/imap/ImapHelper.java
deleted file mode 100644
index b2a40fb64..000000000
--- a/java/com/android/voicemailomtp/imap/ImapHelper.java
+++ /dev/null
@@ -1,711 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License
- */
-package com.android.voicemailomtp.imap;
-
-import android.content.Context;
-import android.net.ConnectivityManager;
-import android.net.Network;
-import android.net.NetworkInfo;
-import android.provider.VoicemailContract;
-import android.telecom.PhoneAccountHandle;
-import android.util.Base64;
-
-import com.android.voicemailomtp.OmtpConstants;
-import com.android.voicemailomtp.OmtpConstants.ChangePinResult;
-import com.android.voicemailomtp.OmtpEvents;
-import com.android.voicemailomtp.OmtpVvmCarrierConfigHelper;
-import com.android.voicemailomtp.VisualVoicemailPreferences;
-import com.android.voicemailomtp.Voicemail;
-import com.android.voicemailomtp.VoicemailStatus;
-import com.android.voicemailomtp.VvmLog;
-import com.android.voicemailomtp.fetch.VoicemailFetchedCallback;
-import com.android.voicemailomtp.mail.Address;
-import com.android.voicemailomtp.mail.Body;
-import com.android.voicemailomtp.mail.BodyPart;
-import com.android.voicemailomtp.mail.FetchProfile;
-import com.android.voicemailomtp.mail.Flag;
-import com.android.voicemailomtp.mail.Message;
-import com.android.voicemailomtp.mail.MessagingException;
-import com.android.voicemailomtp.mail.Multipart;
-import com.android.voicemailomtp.mail.TempDirectory;
-import com.android.voicemailomtp.mail.internet.MimeMessage;
-import com.android.voicemailomtp.mail.store.ImapConnection;
-import com.android.voicemailomtp.mail.store.ImapFolder;
-import com.android.voicemailomtp.mail.store.ImapStore;
-import com.android.voicemailomtp.mail.store.imap.ImapConstants;
-import com.android.voicemailomtp.mail.store.imap.ImapResponse;
-import com.android.voicemailomtp.mail.utils.LogUtils;
-import com.android.voicemailomtp.sync.OmtpVvmSyncService.TranscriptionFetchedCallback;
-
-import java.io.BufferedOutputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.Closeable;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-import java.util.Locale;
-import org.apache.commons.io.IOUtils;
-
-/**
- * A helper interface to abstract commands sent across IMAP interface for a given account.
- */
-public class ImapHelper implements Closeable {
-
-    private static final String TAG = "ImapHelper";
-
-    private ImapFolder mFolder;
-    private ImapStore mImapStore;
-
-    private final Context mContext;
-    private final PhoneAccountHandle mPhoneAccount;
-    private final Network mNetwork;
-    private final VoicemailStatus.Editor mStatus;
-
-    VisualVoicemailPreferences mPrefs;
-    private static final String PREF_KEY_QUOTA_OCCUPIED = "quota_occupied_";
-    private static final String PREF_KEY_QUOTA_TOTAL = "quota_total_";
-
-    private int mQuotaOccupied;
-    private int mQuotaTotal;
-
-    private final OmtpVvmCarrierConfigHelper mConfig;
-
-    public class InitializingException extends Exception {
-
-        public InitializingException(String message) {
-            super(message);
-        }
-    }
-
-    public ImapHelper(Context context, PhoneAccountHandle phoneAccount, Network network,
-        VoicemailStatus.Editor status)
-        throws InitializingException {
-        this(context,
-                new OmtpVvmCarrierConfigHelper(
-                        context,
-                        phoneAccount),
-                phoneAccount,
-                network,
-                status);
-    }
-
-    public ImapHelper(Context context, OmtpVvmCarrierConfigHelper config,
-        PhoneAccountHandle phoneAccount, Network network, VoicemailStatus.Editor status)
-        throws InitializingException {
-        mContext = context;
-        mPhoneAccount = phoneAccount;
-        mNetwork = network;
-        mStatus = status;
-        mConfig = config;
-        mPrefs = new VisualVoicemailPreferences(context,
-                phoneAccount);
-
-        try {
-            TempDirectory.setTempDirectory(context);
-
-            String username = mPrefs.getString(OmtpConstants.IMAP_USER_NAME, null);
-            String password = mPrefs.getString(OmtpConstants.IMAP_PASSWORD, null);
-            String serverName = mPrefs.getString(OmtpConstants.SERVER_ADDRESS, null);
-            int port = Integer.parseInt(
-                    mPrefs.getString(OmtpConstants.IMAP_PORT, null));
-            int auth = ImapStore.FLAG_NONE;
-
-            int sslPort = mConfig.getSslPort();
-            if (sslPort != 0) {
-                port = sslPort;
-                auth = ImapStore.FLAG_SSL;
-            }
-
-            mImapStore = new ImapStore(
-                    context, this, username, password, port, serverName, auth, network);
-        } catch (NumberFormatException e) {
-            handleEvent(OmtpEvents.DATA_INVALID_PORT);
-            LogUtils.w(TAG, "Could not parse port number");
-            throw new InitializingException("cannot initialize ImapHelper:" + e.toString());
-        }
-
-        mQuotaOccupied = mPrefs
-                .getInt(PREF_KEY_QUOTA_OCCUPIED, VoicemailContract.Status.QUOTA_UNAVAILABLE);
-        mQuotaTotal = mPrefs
-                .getInt(PREF_KEY_QUOTA_TOTAL, VoicemailContract.Status.QUOTA_UNAVAILABLE);
-    }
-
-    @Override
-    public void close() {
-        mImapStore.closeConnection();
-    }
-
-    public boolean isRoaming() {
-        ConnectivityManager connectivityManager = (ConnectivityManager) mContext.getSystemService(
-                Context.CONNECTIVITY_SERVICE);
-        NetworkInfo info = connectivityManager.getNetworkInfo(mNetwork);
-        if (info == null) {
-            return false;
-        }
-        return info.isRoaming();
-    }
-
-    public OmtpVvmCarrierConfigHelper getConfig() {
-        return mConfig;
-    }
-
-    public ImapConnection connect() {
-        return mImapStore.getConnection();
-    }
-
-    /**
-     * The caller thread will block until the method returns.
-     */
-    public boolean markMessagesAsRead(List<Voicemail> voicemails) {
-        return setFlags(voicemails, Flag.SEEN);
-    }
-
-    /**
-     * The caller thread will block until the method returns.
-     */
-    public boolean markMessagesAsDeleted(List<Voicemail> voicemails) {
-        return setFlags(voicemails, Flag.DELETED);
-    }
-
-    public void handleEvent(OmtpEvents event) {
-        mConfig.handleEvent(mStatus, event);
-    }
-
-    /**
-     * Set flags on the server for a given set of voicemails.
-     *
-     * @param voicemails The voicemails to set flags for.
-     * @param flags The flags to set on the voicemails.
-     * @return {@code true} if the operation completes successfully, {@code false} otherwise.
-     */
-    private boolean setFlags(List<Voicemail> voicemails, String... flags) {
-        if (voicemails.size() == 0) {
-            return false;
-        }
-        try {
-            mFolder = openImapFolder(ImapFolder.MODE_READ_WRITE);
-            if (mFolder != null) {
-                mFolder.setFlags(convertToImapMessages(voicemails), flags, true);
-                return true;
-            }
-            return false;
-        } catch (MessagingException e) {
-            LogUtils.e(TAG, e, "Messaging exception");
-            return false;
-        } finally {
-            closeImapFolder();
-        }
-    }
-
-    /**
-     * Fetch a list of voicemails from the server.
-     *
-     * @return A list of voicemail objects containing data about voicemails stored on the server.
-     */
-    public List<Voicemail> fetchAllVoicemails() {
-        List<Voicemail> result = new ArrayList<Voicemail>();
-        Message[] messages;
-        try {
-            mFolder = openImapFolder(ImapFolder.MODE_READ_WRITE);
-            if (mFolder == null) {
-                // This means we were unable to successfully open the folder.
-                return null;
-            }
-
-            // This method retrieves lightweight messages containing only the uid of the message.
-            messages = mFolder.getMessages(null);
-
-            for (Message message : messages) {
-                // Get the voicemail details (message structure).
-                MessageStructureWrapper messageStructureWrapper = fetchMessageStructure(message);
-                if (messageStructureWrapper != null) {
-                    result.add(getVoicemailFromMessageStructure(messageStructureWrapper));
-                }
-            }
-            return result;
-        } catch (MessagingException e) {
-            LogUtils.e(TAG, e, "Messaging Exception");
-            return null;
-        } finally {
-            closeImapFolder();
-        }
-    }
-
-    /**
-     * Extract voicemail details from the message structure. Also fetch transcription if a
-     * transcription exists.
-     */
-    private Voicemail getVoicemailFromMessageStructure(
-            MessageStructureWrapper messageStructureWrapper) throws MessagingException {
-        Message messageDetails = messageStructureWrapper.messageStructure;
-
-        TranscriptionFetchedListener listener = new TranscriptionFetchedListener();
-        if (messageStructureWrapper.transcriptionBodyPart != null) {
-            FetchProfile fetchProfile = new FetchProfile();
-            fetchProfile.add(messageStructureWrapper.transcriptionBodyPart);
-
-            mFolder.fetch(new Message[]{messageDetails}, fetchProfile, listener);
-        }
-
-        // Found an audio attachment, this is a valid voicemail.
-        long time = messageDetails.getSentDate().getTime();
-        String number = getNumber(messageDetails.getFrom());
-        boolean isRead = Arrays.asList(messageDetails.getFlags()).contains(Flag.SEEN);
-        return Voicemail.createForInsertion(time, number)
-                .setPhoneAccount(mPhoneAccount)
-                .setSourcePackage(mContext.getPackageName())
-                .setSourceData(messageDetails.getUid())
-                .setIsRead(isRead)
-                .setTranscription(listener.getVoicemailTranscription())
-                .build();
-    }
-
-    /**
-     * The "from" field of a visual voicemail IMAP message is the number of the caller who left the
-     * message. Extract this number from the list of "from" addresses.
-     *
-     * @param fromAddresses A list of addresses that comprise the "from" line.
-     * @return The number of the voicemail sender.
-     */
-    private String getNumber(Address[] fromAddresses) {
-        if (fromAddresses != null && fromAddresses.length > 0) {
-            if (fromAddresses.length != 1) {
-                LogUtils.w(TAG, "More than one from addresses found. Using the first one.");
-            }
-            String sender = fromAddresses[0].getAddress();
-            int atPos = sender.indexOf('@');
-            if (atPos != -1) {
-                // Strip domain part of the address.
-                sender = sender.substring(0, atPos);
-            }
-            return sender;
-        }
-        return null;
-    }
-
-    /**
-     * Fetches the structure of the given message and returns a wrapper containing the message
-     * structure and the transcription structure (if applicable).
-     *
-     * @throws MessagingException if fetching the structure of the message fails
-     */
-    private MessageStructureWrapper fetchMessageStructure(Message message)
-            throws MessagingException {
-        LogUtils.d(TAG, "Fetching message structure for " + message.getUid());
-
-        MessageStructureFetchedListener listener = new MessageStructureFetchedListener();
-
-        FetchProfile fetchProfile = new FetchProfile();
-        fetchProfile.addAll(Arrays.asList(FetchProfile.Item.FLAGS, FetchProfile.Item.ENVELOPE,
-                FetchProfile.Item.STRUCTURE));
-
-        // The IMAP folder fetch method will call "messageRetrieved" on the listener when the
-        // message is successfully retrieved.
-        mFolder.fetch(new Message[]{message}, fetchProfile, listener);
-        return listener.getMessageStructure();
-    }
-
-    public boolean fetchVoicemailPayload(VoicemailFetchedCallback callback, final String uid) {
-        try {
-            mFolder = openImapFolder(ImapFolder.MODE_READ_WRITE);
-            if (mFolder == null) {
-                // This means we were unable to successfully open the folder.
-                return false;
-            }
-            Message message = mFolder.getMessage(uid);
-            if (message == null) {
-                return false;
-            }
-            VoicemailPayload voicemailPayload = fetchVoicemailPayload(message);
-            callback.setVoicemailContent(voicemailPayload);
-            return true;
-        } catch (MessagingException e) {
-        } finally {
-            closeImapFolder();
-        }
-        return false;
-    }
-
-    /**
-     * Fetches the body of the given message and returns the parsed voicemail payload.
-     *
-     * @throws MessagingException if fetching the body of the message fails
-     */
-    private VoicemailPayload fetchVoicemailPayload(Message message)
-            throws MessagingException {
-        LogUtils.d(TAG, "Fetching message body for " + message.getUid());
-
-        MessageBodyFetchedListener listener = new MessageBodyFetchedListener();
-
-        FetchProfile fetchProfile = new FetchProfile();
-        fetchProfile.add(FetchProfile.Item.BODY);
-
-        mFolder.fetch(new Message[]{message}, fetchProfile, listener);
-        return listener.getVoicemailPayload();
-    }
-
-    public boolean fetchTranscription(TranscriptionFetchedCallback callback, String uid) {
-        try {
-            mFolder = openImapFolder(ImapFolder.MODE_READ_WRITE);
-            if (mFolder == null) {
-                // This means we were unable to successfully open the folder.
-                return false;
-            }
-
-            Message message = mFolder.getMessage(uid);
-            if (message == null) {
-                return false;
-            }
-
-            MessageStructureWrapper messageStructureWrapper = fetchMessageStructure(message);
-            if (messageStructureWrapper != null) {
-                TranscriptionFetchedListener listener = new TranscriptionFetchedListener();
-                if (messageStructureWrapper.transcriptionBodyPart != null) {
-                    FetchProfile fetchProfile = new FetchProfile();
-                    fetchProfile.add(messageStructureWrapper.transcriptionBodyPart);
-
-                    // This method is called synchronously so the transcription will be populated
-                    // in the listener once the next method is called.
-                    mFolder.fetch(new Message[]{message}, fetchProfile, listener);
-                    callback.setVoicemailTranscription(listener.getVoicemailTranscription());
-                }
-            }
-            return true;
-        } catch (MessagingException e) {
-            LogUtils.e(TAG, e, "Messaging Exception");
-            return false;
-        } finally {
-            closeImapFolder();
-        }
-    }
-
-
-    @ChangePinResult
-    public int changePin(String oldPin, String newPin)
-            throws MessagingException {
-        ImapConnection connection = mImapStore.getConnection();
-        try {
-            String command = getConfig().getProtocol()
-                    .getCommand(OmtpConstants.IMAP_CHANGE_TUI_PWD_FORMAT);
-            connection.sendCommand(
-                    String.format(Locale.US, command, newPin, oldPin), true);
-            return getChangePinResultFromImapResponse(connection.readResponse());
-        } catch (IOException ioe) {
-            VvmLog.e(TAG, "changePin: ", ioe);
-            return OmtpConstants.CHANGE_PIN_SYSTEM_ERROR;
-        } finally {
-            connection.destroyResponses();
-        }
-    }
-
-    public void changeVoicemailTuiLanguage(String languageCode)
-            throws MessagingException {
-        ImapConnection connection = mImapStore.getConnection();
-        try {
-            String command = getConfig().getProtocol()
-                    .getCommand(OmtpConstants.IMAP_CHANGE_VM_LANG_FORMAT);
-            connection.sendCommand(
-                    String.format(Locale.US, command, languageCode), true);
-        } catch (IOException ioe) {
-            LogUtils.e(TAG, ioe.toString());
-        } finally {
-            connection.destroyResponses();
-        }
-    }
-
-    public void closeNewUserTutorial() throws MessagingException {
-        ImapConnection connection = mImapStore.getConnection();
-        try {
-            String command = getConfig().getProtocol()
-                    .getCommand(OmtpConstants.IMAP_CLOSE_NUT);
-            connection.executeSimpleCommand(command, false);
-        } catch (IOException ioe) {
-            throw new MessagingException(MessagingException.SERVER_ERROR, ioe.toString());
-        } finally {
-            connection.destroyResponses();
-        }
-    }
-
-    @ChangePinResult
-    private static int getChangePinResultFromImapResponse(ImapResponse response)
-            throws MessagingException {
-        if (!response.isTagged()) {
-            throw new MessagingException(MessagingException.SERVER_ERROR,
-                    "tagged response expected");
-        }
-        if (!response.isOk()) {
-            String message = response.getStringOrEmpty(1).getString();
-            LogUtils.d(TAG, "change PIN failed: " + message);
-            if (OmtpConstants.RESPONSE_CHANGE_PIN_TOO_SHORT.equals(message)) {
-                return OmtpConstants.CHANGE_PIN_TOO_SHORT;
-            }
-            if (OmtpConstants.RESPONSE_CHANGE_PIN_TOO_LONG.equals(message)) {
-                return OmtpConstants.CHANGE_PIN_TOO_LONG;
-            }
-            if (OmtpConstants.RESPONSE_CHANGE_PIN_TOO_WEAK.equals(message)) {
-                return OmtpConstants.CHANGE_PIN_TOO_WEAK;
-            }
-            if (OmtpConstants.RESPONSE_CHANGE_PIN_MISMATCH.equals(message)) {
-                return OmtpConstants.CHANGE_PIN_MISMATCH;
-            }
-            if (OmtpConstants.RESPONSE_CHANGE_PIN_INVALID_CHARACTER.equals(message)) {
-                return OmtpConstants.CHANGE_PIN_INVALID_CHARACTER;
-            }
-            return OmtpConstants.CHANGE_PIN_SYSTEM_ERROR;
-        }
-        LogUtils.d(TAG, "change PIN succeeded");
-        return OmtpConstants.CHANGE_PIN_SUCCESS;
-    }
-
-    public void updateQuota() {
-        try {
-            mFolder = openImapFolder(ImapFolder.MODE_READ_WRITE);
-            if (mFolder == null) {
-                // This means we were unable to successfully open the folder.
-                return;
-            }
-            updateQuota(mFolder);
-        } catch (MessagingException e) {
-            LogUtils.e(TAG, e, "Messaging Exception");
-        } finally {
-            closeImapFolder();
-        }
-    }
-
-    private void updateQuota(ImapFolder folder) throws MessagingException {
-        setQuota(folder.getQuota());
-    }
-
-    private void setQuota(ImapFolder.Quota quota) {
-        if (quota == null) {
-            return;
-        }
-        if (quota.occupied == mQuotaOccupied && quota.total == mQuotaTotal) {
-            VvmLog.v(TAG, "Quota hasn't changed");
-            return;
-        }
-        mQuotaOccupied = quota.occupied;
-        mQuotaTotal = quota.total;
-        VoicemailStatus.edit(mContext, mPhoneAccount)
-                .setQuota(mQuotaOccupied, mQuotaTotal)
-                .apply();
-        mPrefs.edit()
-                .putInt(PREF_KEY_QUOTA_OCCUPIED, mQuotaOccupied)
-                .putInt(PREF_KEY_QUOTA_TOTAL, mQuotaTotal)
-                .apply();
-        VvmLog.v(TAG, "Quota changed to " + mQuotaOccupied + "/" + mQuotaTotal);
-    }
-
-    /**
-     * A wrapper to hold a message with its header details and the structure for transcriptions (so
-     * they can be fetched in the future).
-     */
-    public class MessageStructureWrapper {
-
-        public Message messageStructure;
-        public BodyPart transcriptionBodyPart;
-
-        public MessageStructureWrapper() {
-        }
-    }
-
-    /**
-     * Listener for the message structure being fetched.
-     */
-    private final class MessageStructureFetchedListener
-            implements ImapFolder.MessageRetrievalListener {
-
-        private MessageStructureWrapper mMessageStructure;
-
-        public MessageStructureFetchedListener() {
-        }
-
-        public MessageStructureWrapper getMessageStructure() {
-            return mMessageStructure;
-        }
-
-        @Override
-        public void messageRetrieved(Message message) {
-            LogUtils.d(TAG, "Fetched message structure for " + message.getUid());
-            LogUtils.d(TAG, "Message retrieved: " + message);
-            try {
-                mMessageStructure = getMessageOrNull(message);
-                if (mMessageStructure == null) {
-                    LogUtils.d(TAG, "This voicemail does not have an attachment...");
-                    return;
-                }
-            } catch (MessagingException e) {
-                LogUtils.e(TAG, e, "Messaging Exception");
-                closeImapFolder();
-            }
-        }
-
-        /**
-         * Check if this IMAP message is a valid voicemail and whether it contains a transcription.
-         *
-         * @param message The IMAP message.
-         * @return The MessageStructureWrapper object corresponding to an IMAP message and
-         * transcription.
-         */
-        private MessageStructureWrapper getMessageOrNull(Message message)
-                throws MessagingException {
-            if (!message.getMimeType().startsWith("multipart/")) {
-                LogUtils.w(TAG, "Ignored non multi-part message");
-                return null;
-            }
-
-            MessageStructureWrapper messageStructureWrapper = new MessageStructureWrapper();
-
-            Multipart multipart = (Multipart) message.getBody();
-            for (int i = 0; i < multipart.getCount(); ++i) {
-                BodyPart bodyPart = multipart.getBodyPart(i);
-                String bodyPartMimeType = bodyPart.getMimeType().toLowerCase();
-                LogUtils.d(TAG, "bodyPart mime type: " + bodyPartMimeType);
-
-                if (bodyPartMimeType.startsWith("audio/")) {
-                    messageStructureWrapper.messageStructure = message;
-                } else if (bodyPartMimeType.startsWith("text/")) {
-                    messageStructureWrapper.transcriptionBodyPart = bodyPart;
-                } else {
-                    VvmLog.v(TAG, "Unknown bodyPart MIME: " + bodyPartMimeType);
-                }
-            }
-
-            if (messageStructureWrapper.messageStructure != null) {
-                return messageStructureWrapper;
-            }
-
-            // No attachment found, this is not a voicemail.
-            return null;
-        }
-    }
-
-    /**
-     * Listener for the message body being fetched.
-     */
-    private final class MessageBodyFetchedListener implements ImapFolder.MessageRetrievalListener {
-
-        private VoicemailPayload mVoicemailPayload;
-
-        /**
-         * Returns the fetch voicemail payload.
-         */
-        public VoicemailPayload getVoicemailPayload() {
-            return mVoicemailPayload;
-        }
-
-        @Override
-        public void messageRetrieved(Message message) {
-            LogUtils.d(TAG, "Fetched message body for " + message.getUid());
-            LogUtils.d(TAG, "Message retrieved: " + message);
-            try {
-                mVoicemailPayload = getVoicemailPayloadFromMessage(message);
-            } catch (MessagingException e) {
-                LogUtils.e(TAG, "Messaging Exception:", e);
-            } catch (IOException e) {
-                LogUtils.e(TAG, "IO Exception:", e);
-            }
-        }
-
-        private VoicemailPayload getVoicemailPayloadFromMessage(Message message)
-                throws MessagingException, IOException {
-            Multipart multipart = (Multipart) message.getBody();
-            List<String> mimeTypes = new ArrayList<>();
-            for (int i = 0; i < multipart.getCount(); ++i) {
-                BodyPart bodyPart = multipart.getBodyPart(i);
-                String bodyPartMimeType = bodyPart.getMimeType().toLowerCase();
-                mimeTypes.add(bodyPartMimeType);
-                if (bodyPartMimeType.startsWith("audio/")) {
-                    byte[] bytes = getDataFromBody(bodyPart.getBody());
-                    LogUtils.d(TAG, String.format("Fetched %s bytes of data", bytes.length));
-                    return new VoicemailPayload(bodyPartMimeType, bytes);
-                }
-            }
-            LogUtils.e(TAG, "No audio attachment found on this voicemail, mimeTypes:" + mimeTypes);
-            return null;
-        }
-    }
-
-    /**
-     * Listener for the transcription being fetched.
-     */
-    private final class TranscriptionFetchedListener implements
-            ImapFolder.MessageRetrievalListener {
-
-        private String mVoicemailTranscription;
-
-        /**
-         * Returns the fetched voicemail transcription.
-         */
-        public String getVoicemailTranscription() {
-            return mVoicemailTranscription;
-        }
-
-        @Override
-        public void messageRetrieved(Message message) {
-            LogUtils.d(TAG, "Fetched transcription for " + message.getUid());
-            try {
-                mVoicemailTranscription = new String(getDataFromBody(message.getBody()));
-            } catch (MessagingException e) {
-                LogUtils.e(TAG, "Messaging Exception:", e);
-            } catch (IOException e) {
-                LogUtils.e(TAG, "IO Exception:", e);
-            }
-        }
-    }
-
-    private ImapFolder openImapFolder(String modeReadWrite) {
-        try {
-            if (mImapStore == null) {
-                return null;
-            }
-            ImapFolder folder = new ImapFolder(mImapStore, ImapConstants.INBOX);
-            folder.open(modeReadWrite);
-            return folder;
-        } catch (MessagingException e) {
-            LogUtils.e(TAG, e, "Messaging Exception");
-        }
-        return null;
-    }
-
-    private Message[] convertToImapMessages(List<Voicemail> voicemails) {
-        Message[] messages = new Message[voicemails.size()];
-        for (int i = 0; i < voicemails.size(); ++i) {
-            messages[i] = new MimeMessage();
-            messages[i].setUid(voicemails.get(i).getSourceData());
-        }
-        return messages;
-    }
-
-    private void closeImapFolder() {
-        if (mFolder != null) {
-            mFolder.close(true);
-        }
-    }
-
-    private byte[] getDataFromBody(Body body) throws IOException, MessagingException {
-        ByteArrayOutputStream out = new ByteArrayOutputStream();
-        BufferedOutputStream bufferedOut = new BufferedOutputStream(out);
-        try {
-            body.writeTo(bufferedOut);
-            return Base64.decode(out.toByteArray(), Base64.DEFAULT);
-        } finally {
-            IOUtils.closeQuietly(bufferedOut);
-            IOUtils.closeQuietly(out);
-        }
-    }
-}
\ No newline at end of file