package eu.siacs.conversations.entities; import android.content.ContentValues; import android.database.Cursor; import android.support.annotation.NonNull; import net.java.otr4j.OtrException; import net.java.otr4j.crypto.OtrCryptoException; import net.java.otr4j.session.SessionID; import net.java.otr4j.session.SessionImpl; import net.java.otr4j.session.SessionStatus; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import java.security.interfaces.DSAPublicKey; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.Iterator; import java.util.List; import java.util.ListIterator; import java.util.Locale; import java.util.concurrent.atomic.AtomicBoolean; import eu.siacs.conversations.Config; import eu.siacs.conversations.crypto.PgpDecryptionService; import eu.siacs.conversations.crypto.axolotl.AxolotlService; import eu.siacs.conversations.xmpp.chatstate.ChatState; import eu.siacs.conversations.xmpp.jid.InvalidJidException; import eu.siacs.conversations.xmpp.jid.Jid; import eu.siacs.conversations.xmpp.mam.MamReference; public class Conversation extends AbstractEntity implements Blockable, Comparable { public static final String TABLENAME = "conversations"; public static final int STATUS_AVAILABLE = 0; public static final int STATUS_ARCHIVED = 1; public static final int MODE_MULTI = 1; public static final int MODE_SINGLE = 0; public static final String NAME = "name"; public static final String ACCOUNT = "accountUuid"; public static final String CONTACT = "contactUuid"; public static final String CONTACTJID = "contactJid"; public static final String STATUS = "status"; public static final String CREATED = "created"; public static final String MODE = "mode"; public static final String ATTRIBUTES = "attributes"; public static final String ATTRIBUTE_MUTED_TILL = "muted_till"; public static final String ATTRIBUTE_ALWAYS_NOTIFY = "always_notify"; public static final String ATTRIBUTE_LAST_CLEAR_HISTORY = "last_clear_history"; public static final String ATTRIBUTE_NEXT_MESSAGE = "next_message"; private static final String ATTRIBUTE_CRYPTO_TARGETS = "crypto_targets"; private static final String ATTRIBUTE_NEXT_ENCRYPTION = "next_encryption"; static final String ATTRIBUTE_MUC_PASSWORD = "muc_password"; private String draftMessage; private String name; private String contactUuid; private String accountUuid; private Jid contactJid; private int status; private long created; private int mode; private JSONObject attributes = new JSONObject(); private Jid nextCounterpart; protected final ArrayList messages = new ArrayList<>(); protected Account account = null; private transient SessionImpl otrSession; private transient String otrFingerprint = null; private Smp mSmp = new Smp(); private transient MucOptions mucOptions = null; private byte[] symmetricKey; private Bookmark bookmark; private boolean messagesLeftOnServer = true; private ChatState mOutgoingChatState = Config.DEFAULT_CHATSTATE; private ChatState mIncomingChatState = Config.DEFAULT_CHATSTATE; private String mLastReceivedOtrMessageId = null; private String mFirstMamReference = null; private Message correctingMessage; public AtomicBoolean messagesLoaded = new AtomicBoolean(true); public boolean hasMessagesLeftOnServer() { return messagesLeftOnServer; } public void setHasMessagesLeftOnServer(boolean value) { this.messagesLeftOnServer = value; } public Message getFirstUnreadMessage() { Message first = null; synchronized (this.messages) { for (int i = messages.size() - 1; i >= 0; --i) { if (messages.get(i).isRead()) { return first; } else { first = messages.get(i); } } } return first; } public Message findUnsentMessageWithUuid(String uuid) { synchronized(this.messages) { for (final Message message : this.messages) { final int s = message.getStatus(); if ((s == Message.STATUS_UNSEND || s == Message.STATUS_WAITING) && message.getUuid().equals(uuid)) { return message; } } } return null; } public void findWaitingMessages(OnMessageFound onMessageFound) { synchronized (this.messages) { for(Message message : this.messages) { if (message.getStatus() == Message.STATUS_WAITING) { onMessageFound.onMessageFound(message); } } } } public void findUnreadMessages(OnMessageFound onMessageFound) { synchronized (this.messages) { for(Message message : this.messages) { if (!message.isRead()) { onMessageFound.onMessageFound(message); } } } } public void findMessagesWithFiles(final OnMessageFound onMessageFound) { synchronized (this.messages) { for (final Message message : this.messages) { if ((message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) && message.getEncryption() != Message.ENCRYPTION_PGP) { onMessageFound.onMessageFound(message); } } } } public Message findMessageWithFileAndUuid(final String uuid) { synchronized (this.messages) { for (final Message message : this.messages) { if (message.getUuid().equals(uuid) && message.getEncryption() != Message.ENCRYPTION_PGP && (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE || message.treatAsDownloadable())) { return message; } } } return null; } public void clearMessages() { synchronized (this.messages) { this.messages.clear(); } } public boolean setIncomingChatState(ChatState state) { if (this.mIncomingChatState == state) { return false; } this.mIncomingChatState = state; return true; } public ChatState getIncomingChatState() { return this.mIncomingChatState; } public boolean setOutgoingChatState(ChatState state) { if (mode == MODE_SINGLE && !getContact().isSelf() || (isPrivateAndNonAnonymous() && getNextCounterpart() == null)) { if (this.mOutgoingChatState != state) { this.mOutgoingChatState = state; return true; } } return false; } public ChatState getOutgoingChatState() { return this.mOutgoingChatState; } public void trim() { synchronized (this.messages) { final int size = messages.size(); final int maxsize = Config.PAGE_SIZE * Config.MAX_NUM_PAGES; if (size > maxsize) { List discards = this.messages.subList(0, size - maxsize); final PgpDecryptionService pgpDecryptionService = account.getPgpDecryptionService(); if (pgpDecryptionService != null) { pgpDecryptionService.discard(discards); } discards.clear(); untieMessages(); } } } public void findUnsentMessagesWithEncryption(int encryptionType, OnMessageFound onMessageFound) { synchronized (this.messages) { for (Message message : this.messages) { if ((message.getStatus() == Message.STATUS_UNSEND || message.getStatus() == Message.STATUS_WAITING) && (message.getEncryption() == encryptionType)) { onMessageFound.onMessageFound(message); } } } } public void findUnsentTextMessages(OnMessageFound onMessageFound) { synchronized (this.messages) { for (Message message : this.messages) { if (message.getType() != Message.TYPE_IMAGE && message.getStatus() == Message.STATUS_UNSEND) { onMessageFound.onMessageFound(message); } } } } public Message findSentMessageWithUuidOrRemoteId(String id) { synchronized (this.messages) { for (Message message : this.messages) { if (id.equals(message.getUuid()) || (message.getStatus() >= Message.STATUS_SEND && id.equals(message.getRemoteMsgId()))) { return message; } } } return null; } public Message findMessageWithRemoteIdAndCounterpart(String id, Jid counterpart, boolean received, boolean carbon) { synchronized (this.messages) { for(int i = this.messages.size() - 1; i >= 0; --i) { Message message = messages.get(i); if (counterpart.equals(message.getCounterpart()) && ((message.getStatus() == Message.STATUS_RECEIVED) == received) && (carbon == message.isCarbon() || received) ) { if (id.equals(message.getRemoteMsgId()) && !message.isFileOrImage() && !message.treatAsDownloadable()) { return message; } else { return null; } } } } return null; } public Message findSentMessageWithUuid(String id) { synchronized (this.messages) { for (Message message : this.messages) { if (id.equals(message.getUuid())) { return message; } } } return null; } public Message findMessageWithRemoteId(String id, Jid counterpart) { synchronized (this.messages) { for(Message message : this.messages) { if (counterpart.equals(message.getCounterpart()) && (id.equals(message.getRemoteMsgId()) || id.equals(message.getUuid()))) { return message; } } } return null; } public boolean hasMessageWithCounterpart(Jid counterpart) { synchronized (this.messages) { for(Message message : this.messages) { if (counterpart.equals(message.getCounterpart())) { return true; } } } return false; } public void populateWithMessages(final List messages) { synchronized (this.messages) { messages.clear(); messages.addAll(this.messages); } for(Iterator iterator = messages.iterator(); iterator.hasNext();) { if (iterator.next().wasMergedIntoPrevious()) { iterator.remove(); } } } @Override public boolean isBlocked() { return getContact().isBlocked(); } @Override public boolean isDomainBlocked() { return getContact().isDomainBlocked(); } @Override public Jid getBlockedJid() { return getContact().getBlockedJid(); } public String getLastReceivedOtrMessageId() { return this.mLastReceivedOtrMessageId; } public void setLastReceivedOtrMessageId(String id) { this.mLastReceivedOtrMessageId = id; } public int countMessages() { synchronized (this.messages) { return this.messages.size(); } } public void setFirstMamReference(String reference) { this.mFirstMamReference = reference; } public String getFirstMamReference() { return this.mFirstMamReference; } public void setLastClearHistory(long time,String reference) { if (reference != null) { setAttribute(ATTRIBUTE_LAST_CLEAR_HISTORY, String.valueOf(time) + ":" + reference); } else { setAttribute(ATTRIBUTE_LAST_CLEAR_HISTORY, String.valueOf(time)); } } public MamReference getLastClearHistory() { return MamReference.fromAttribute(getAttribute(ATTRIBUTE_LAST_CLEAR_HISTORY)); } public List getAcceptedCryptoTargets() { if (mode == MODE_SINGLE) { return Collections.singletonList(getJid().toBareJid()); } else { return getJidListAttribute(ATTRIBUTE_CRYPTO_TARGETS); } } public void setAcceptedCryptoTargets(List acceptedTargets) { setAttribute(ATTRIBUTE_CRYPTO_TARGETS, acceptedTargets); } public boolean setCorrectingMessage(Message correctingMessage) { this.correctingMessage = correctingMessage; return correctingMessage == null && draftMessage != null; } public Message getCorrectingMessage() { return this.correctingMessage; } public boolean withSelf() { return getContact().isSelf(); } @Override public int compareTo(@NonNull Conversation another) { final Message left = getLatestMessage(); final Message right = another.getLatestMessage(); if (left.getTimeSent() > right.getTimeSent()) { return -1; } else if (left.getTimeSent() < right.getTimeSent()) { return 1; } else { return 0; } } public void setDraftMessage(String draftMessage) { this.draftMessage = draftMessage; } public String getDraftMessage() { return draftMessage; } public interface OnMessageFound { void onMessageFound(final Message message); } public Conversation(final String name, final Account account, final Jid contactJid, final int mode) { this(java.util.UUID.randomUUID().toString(), name, null, account .getUuid(), contactJid, System.currentTimeMillis(), STATUS_AVAILABLE, mode, ""); this.account = account; } public Conversation(final String uuid, final String name, final String contactUuid, final String accountUuid, final Jid contactJid, final long created, final int status, final int mode, final String attributes) { this.uuid = uuid; this.name = name; this.contactUuid = contactUuid; this.accountUuid = accountUuid; this.contactJid = contactJid; this.created = created; this.status = status; this.mode = mode; try { this.attributes = new JSONObject(attributes == null ? "" : attributes); } catch (JSONException e) { this.attributes = new JSONObject(); } } public boolean isRead() { return (this.messages.size() == 0) || this.messages.get(this.messages.size() - 1).isRead(); } public List markRead() { final List unread = new ArrayList<>(); synchronized (this.messages) { for(Message message : this.messages) { if (!message.isRead()) { message.markRead(); unread.add(message); } } } return unread; } public Message getLatestMarkableMessage(boolean isPrivateAndNonAnonymousMuc) { synchronized (this.messages) { for (int i = this.messages.size() - 1; i >= 0; --i) { final Message message = this.messages.get(i); if (message.getStatus() <= Message.STATUS_RECEIVED && (message.markable || isPrivateAndNonAnonymousMuc) && message.getType() != Message.TYPE_PRIVATE) { return message.isRead() ? null : message; } } } return null; } public Message getLatestMessage() { synchronized (this.messages) { if (this.messages.size() == 0) { Message message = new Message(this, "", Message.ENCRYPTION_NONE); message.setType(Message.TYPE_STATUS); message.setTime(Math.max(getCreated(), getLastClearHistory().getTimestamp())); return message; } else { return this.messages.get(this.messages.size() - 1); } } } public String getName() { if (getMode() == MODE_MULTI) { final String subject = getMucOptions().getSubject(); final String bookmarkName = bookmark != null ? bookmark.getBookmarkName() : null; if (subject != null && !subject.trim().isEmpty()) { return subject; } else if (bookmarkName != null && !bookmarkName.trim().isEmpty()) { return bookmarkName; } else { String generatedName = getMucOptions().createNameFromParticipants(); if (generatedName != null) { return generatedName; } else { return getJid().getUnescapedLocalpart(); } } } else if (isWithStranger()) { return contactJid.toBareJid().toString(); } else { return this.getContact().getDisplayName(); } } public String getAccountUuid() { return this.accountUuid; } public Account getAccount() { return this.account; } public Contact getContact() { return this.account.getRoster().getContact(this.contactJid); } public void setAccount(final Account account) { this.account = account; } @Override public Jid getJid() { return this.contactJid; } public int getStatus() { return this.status; } public long getCreated() { return this.created; } public ContentValues getContentValues() { ContentValues values = new ContentValues(); values.put(UUID, uuid); values.put(NAME, name); values.put(CONTACT, contactUuid); values.put(ACCOUNT, accountUuid); values.put(CONTACTJID, contactJid.toPreppedString()); values.put(CREATED, created); values.put(STATUS, status); values.put(MODE, mode); values.put(ATTRIBUTES, attributes.toString()); return values; } public static Conversation fromCursor(Cursor cursor) { Jid jid; try { jid = Jid.fromString(cursor.getString(cursor.getColumnIndex(CONTACTJID)), true); } catch (final InvalidJidException e) { // Borked DB.. jid = null; } return new Conversation(cursor.getString(cursor.getColumnIndex(UUID)), cursor.getString(cursor.getColumnIndex(NAME)), cursor.getString(cursor.getColumnIndex(CONTACT)), cursor.getString(cursor.getColumnIndex(ACCOUNT)), jid, cursor.getLong(cursor.getColumnIndex(CREATED)), cursor.getInt(cursor.getColumnIndex(STATUS)), cursor.getInt(cursor.getColumnIndex(MODE)), cursor.getString(cursor.getColumnIndex(ATTRIBUTES))); } public void setStatus(int status) { this.status = status; } public int getMode() { return this.mode; } public void setMode(int mode) { this.mode = mode; } public SessionImpl startOtrSession(String presence, boolean sendStart) { if (this.otrSession != null) { return this.otrSession; } else { final SessionID sessionId = new SessionID(this.getJid().toBareJid().toString(), presence, "xmpp"); this.otrSession = new SessionImpl(sessionId, getAccount().getOtrService()); try { if (sendStart) { this.otrSession.startSession(); return this.otrSession; } return this.otrSession; } catch (OtrException e) { return null; } } } public SessionImpl getOtrSession() { return this.otrSession; } public void resetOtrSession() { this.otrFingerprint = null; this.otrSession = null; this.mSmp.hint = null; this.mSmp.secret = null; this.mSmp.status = Smp.STATUS_NONE; } public Smp smp() { return mSmp; } public boolean startOtrIfNeeded() { if (this.otrSession != null && this.otrSession.getSessionStatus() != SessionStatus.ENCRYPTED) { try { this.otrSession.startSession(); return true; } catch (OtrException e) { this.resetOtrSession(); return false; } } else { return true; } } public boolean endOtrIfNeeded() { if (this.otrSession != null) { if (this.otrSession.getSessionStatus() == SessionStatus.ENCRYPTED) { try { this.otrSession.endSession(); this.resetOtrSession(); return true; } catch (OtrException e) { this.resetOtrSession(); return false; } } else { this.resetOtrSession(); return false; } } else { return false; } } public boolean hasValidOtrSession() { return this.otrSession != null; } public synchronized String getOtrFingerprint() { if (this.otrFingerprint == null) { try { if (getOtrSession() == null || getOtrSession().getSessionStatus() != SessionStatus.ENCRYPTED) { return null; } DSAPublicKey remotePubKey = (DSAPublicKey) getOtrSession().getRemotePublicKey(); this.otrFingerprint = getAccount().getOtrService().getFingerprint(remotePubKey).toLowerCase(Locale.US); } catch (final OtrCryptoException | UnsupportedOperationException ignored) { return null; } } return this.otrFingerprint; } public boolean verifyOtrFingerprint() { final String fingerprint = getOtrFingerprint(); if (fingerprint != null) { getContact().addOtrFingerprint(fingerprint); return true; } else { return false; } } public boolean isOtrFingerprintVerified() { return getContact().getOtrFingerprints().contains(getOtrFingerprint()); } /** * short for is Private and Non-anonymous */ public boolean isSingleOrPrivateAndNonAnonymous() { return mode == MODE_SINGLE || isPrivateAndNonAnonymous(); } public boolean isPrivateAndNonAnonymous() { return getMucOptions().isPrivateAndNonAnonymous(); } public synchronized MucOptions getMucOptions() { if (this.mucOptions == null) { this.mucOptions = new MucOptions(this); } return this.mucOptions; } public void resetMucOptions() { this.mucOptions = null; } public void setContactJid(final Jid jid) { this.contactJid = jid; } public void setNextCounterpart(Jid jid) { this.nextCounterpart = jid; } public Jid getNextCounterpart() { return this.nextCounterpart; } public int getNextEncryption() { return fixAvailableEncryption(this.getIntAttribute(ATTRIBUTE_NEXT_ENCRYPTION, getDefaultEncryption())); } private int fixAvailableEncryption(int selectedEncryption) { switch(selectedEncryption) { case Message.ENCRYPTION_NONE: return Config.supportUnencrypted() ? selectedEncryption : getDefaultEncryption(); case Message.ENCRYPTION_AXOLOTL: return Config.supportOmemo() ? selectedEncryption : getDefaultEncryption(); case Message.ENCRYPTION_OTR: return Config.supportOtr() ? selectedEncryption : getDefaultEncryption(); case Message.ENCRYPTION_PGP: case Message.ENCRYPTION_DECRYPTED: case Message.ENCRYPTION_DECRYPTION_FAILED: return Config.supportOpenPgp() ? Message.ENCRYPTION_PGP : getDefaultEncryption(); default: return getDefaultEncryption(); } } private int getDefaultEncryption() { AxolotlService axolotlService = account.getAxolotlService(); if (Config.supportUnencrypted()) { return Message.ENCRYPTION_NONE; } else if (Config.supportOmemo() && (axolotlService != null && axolotlService.isConversationAxolotlCapable(this) || !Config.multipleEncryptionChoices())) { return Message.ENCRYPTION_AXOLOTL; } else if (Config.supportOtr() && mode == MODE_SINGLE) { return Message.ENCRYPTION_OTR; } else if (Config.supportOpenPgp()) { return Message.ENCRYPTION_PGP; } else { return Message.ENCRYPTION_NONE; } } public void setNextEncryption(int encryption) { this.setAttribute(ATTRIBUTE_NEXT_ENCRYPTION, String.valueOf(encryption)); } public String getNextMessage() { final String nextMessage = getAttribute(ATTRIBUTE_NEXT_MESSAGE); return nextMessage == null ? "" : nextMessage; } public boolean smpRequested() { return smp().status == Smp.STATUS_CONTACT_REQUESTED; } public boolean setNextMessage(String message) { boolean changed = !getNextMessage().equals(message); this.setAttribute(ATTRIBUTE_NEXT_MESSAGE, message); return changed; } public void setSymmetricKey(byte[] key) { this.symmetricKey = key; } public byte[] getSymmetricKey() { return this.symmetricKey; } public void setBookmark(Bookmark bookmark) { this.bookmark = bookmark; this.bookmark.setConversation(this); } public void deregisterWithBookmark() { if (this.bookmark != null) { this.bookmark.setConversation(null); } this.bookmark = null; } public Bookmark getBookmark() { return this.bookmark; } public Message findDuplicateMessage(Message message) { synchronized (this.messages) { for (int i = this.messages.size() - 1; i >= 0; --i) { if (this.messages.get(i).similar(message)) { return this.messages.get(i); } } } return null; } public boolean hasDuplicateMessage(Message message) { return findDuplicateMessage(message) != null; } public Message findSentMessageWithBody(String body) { synchronized (this.messages) { for (int i = this.messages.size() - 1; i >= 0; --i) { Message message = this.messages.get(i); if (message.getStatus() == Message.STATUS_UNSEND || message.getStatus() == Message.STATUS_SEND) { String otherBody; if (message.hasFileOnRemoteHost()) { otherBody = message.getFileParams().url.toString(); } else { otherBody = message.body; } if (otherBody != null && otherBody.equals(body)) { return message; } } } return null; } } public MamReference getLastMessageTransmitted() { final MamReference lastClear = getLastClearHistory(); MamReference lastReceived = new MamReference(0); synchronized (this.messages) { for(int i = this.messages.size() - 1; i >= 0; --i) { final Message message = this.messages.get(i); if (message.getType() == Message.TYPE_PRIVATE) { continue; //it's unsafe to use private messages as anchor. They could be coming from user archive } if (message.getStatus() == Message.STATUS_RECEIVED || message.isCarbon() || message.getServerMsgId() != null) { lastReceived = new MamReference(message.getTimeSent(),message.getServerMsgId()); break; } } } return MamReference.max(lastClear,lastReceived); } public void setMutedTill(long value) { this.setAttribute(ATTRIBUTE_MUTED_TILL, String.valueOf(value)); } public boolean isMuted() { return System.currentTimeMillis() < this.getLongAttribute(ATTRIBUTE_MUTED_TILL, 0); } public boolean alwaysNotify() { return mode == MODE_SINGLE || getBooleanAttribute(ATTRIBUTE_ALWAYS_NOTIFY, Config.ALWAYS_NOTIFY_BY_DEFAULT || isPrivateAndNonAnonymous()); } public boolean setAttribute(String key, String value) { synchronized (this.attributes) { try { this.attributes.put(key, value == null ? "" : value); return true; } catch (JSONException e) { return false; } } } public boolean setAttribute(String key, List jids) { JSONArray array = new JSONArray(); for(Jid jid : jids) { array.put(jid.toBareJid().toString()); } synchronized (this.attributes) { try { this.attributes.put(key, array); return true; } catch (JSONException e) { e.printStackTrace(); return false; } } } public String getAttribute(String key) { synchronized (this.attributes) { try { return this.attributes.getString(key); } catch (JSONException e) { return null; } } } private List getJidListAttribute(String key) { ArrayList list = new ArrayList<>(); synchronized (this.attributes) { try { JSONArray array = this.attributes.getJSONArray(key); for (int i = 0; i < array.length(); ++i) { try { list.add(Jid.fromString(array.getString(i))); } catch (InvalidJidException e) { //ignored } } } catch (JSONException e) { //ignored } } return list; } private int getIntAttribute(String key, int defaultValue) { String value = this.getAttribute(key); if (value == null) { return defaultValue; } else { try { return Integer.parseInt(value); } catch (NumberFormatException e) { return defaultValue; } } } public long getLongAttribute(String key, long defaultValue) { String value = this.getAttribute(key); if (value == null) { return defaultValue; } else { try { return Long.parseLong(value); } catch (NumberFormatException e) { return defaultValue; } } } private boolean getBooleanAttribute(String key, boolean defaultValue) { String value = this.getAttribute(key); if (value == null) { return defaultValue; } else { return Boolean.parseBoolean(value); } } public void add(Message message) { synchronized (this.messages) { this.messages.add(message); } } public void prepend(Message message) { synchronized (this.messages) { this.messages.add(0,message); } } public void addAll(int index, List messages) { synchronized (this.messages) { this.messages.addAll(index, messages); } account.getPgpDecryptionService().decrypt(messages); } public void expireOldMessages(long timestamp) { synchronized (this.messages) { for(ListIterator iterator = this.messages.listIterator(); iterator.hasNext();) { if (iterator.next().getTimeSent() < timestamp) { iterator.remove(); } } untieMessages(); } } public void sort() { synchronized (this.messages) { Collections.sort(this.messages, new Comparator() { @Override public int compare(Message left, Message right) { if (left.getTimeSent() < right.getTimeSent()) { return -1; } else if (left.getTimeSent() > right.getTimeSent()) { return 1; } else { return 0; } } }); untieMessages(); } } private void untieMessages() { for(Message message : this.messages) { message.untie(); } } public int unreadCount() { synchronized (this.messages) { int count = 0; for(int i = this.messages.size() - 1; i >= 0; --i) { if (this.messages.get(i).isRead()) { return count; } ++count; } return count; } } public int receivedMessagesCount() { int count = 0; synchronized (this.messages) { for(Message message : messages) { if (message.getStatus() == Message.STATUS_RECEIVED) { ++count; } } } return count; } private int sentMessagesCount() { int count = 0; synchronized (this.messages) { for(Message message : messages) { if (message.getStatus() != Message.STATUS_RECEIVED) { ++count; } } } return count; } public boolean isWithStranger() { return mode == MODE_SINGLE && !getJid().equals(account.getJid().toDomainJid()) && !getContact().showInRoster() && sentMessagesCount() == 0; } public class Smp { public static final int STATUS_NONE = 0; public static final int STATUS_CONTACT_REQUESTED = 1; public static final int STATUS_WE_REQUESTED = 2; public static final int STATUS_FAILED = 3; public static final int STATUS_VERIFIED = 4; public String secret = null; public String hint = null; public int status = 0; } }