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package eu.siacs.conversations.crypto;
import android.app.PendingIntent;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.services.XmppConnectionService;
import eu.siacs.conversations.ui.UiCallback;
public class PgpDecryptionService {
private final XmppConnectionService xmppConnectionService;
private final ConcurrentHashMap<String, List<Message>> messages = new ConcurrentHashMap<>();
private final ConcurrentHashMap<String, Boolean> decryptingMessages = new ConcurrentHashMap<>();
private Boolean keychainLocked = false;
private final Object keychainLockedLock = new Object();
public PgpDecryptionService(XmppConnectionService xmppConnectionService) {
this.xmppConnectionService = xmppConnectionService;
}
public void add(Message message) {
if (isRunning()) {
decryptDirectly(message);
} else {
store(message);
}
}
public void addAll(List<Message> messagesList) {
if (!messagesList.isEmpty()) {
String conversationUuid = messagesList.get(0).getConversation().getUuid();
if (!messages.containsKey(conversationUuid)) {
List<Message> list = Collections.synchronizedList(new LinkedList<Message>());
messages.put(conversationUuid, list);
}
synchronized (messages.get(conversationUuid)) {
messages.get(conversationUuid).addAll(messagesList);
}
decryptAllMessages();
}
}
public void onKeychainUnlocked() {
synchronized (keychainLockedLock) {
keychainLocked = false;
}
decryptAllMessages();
}
public void onKeychainLocked() {
synchronized (keychainLockedLock) {
keychainLocked = true;
}
xmppConnectionService.updateConversationUi();
}
public void onOpenPgpServiceBound() {
decryptAllMessages();
}
public boolean isRunning() {
synchronized (keychainLockedLock) {
return !keychainLocked;
}
}
private void store(Message message) {
if (messages.containsKey(message.getConversation().getUuid())) {
messages.get(message.getConversation().getUuid()).add(message);
} else {
List<Message> messageList = Collections.synchronizedList(new LinkedList<Message>());
messageList.add(message);
messages.put(message.getConversation().getUuid(), messageList);
}
}
private void decryptAllMessages() {
for (String uuid : messages.keySet()) {
decryptMessages(uuid);
}
}
private void decryptMessages(final String uuid) {
synchronized (decryptingMessages) {
Boolean decrypting = decryptingMessages.get(uuid);
if ((decrypting != null && !decrypting) || decrypting == null) {
decryptingMessages.put(uuid, true);
decryptMessage(uuid);
}
}
}
private void decryptMessage(final String uuid) {
Message message = null;
synchronized (messages.get(uuid)) {
while (!messages.get(uuid).isEmpty()) {
if (messages.get(uuid).get(0).getEncryption() == Message.ENCRYPTION_PGP) {
if (isRunning()) {
message = messages.get(uuid).remove(0);
}
break;
} else {
messages.get(uuid).remove(0);
}
}
if (message != null && xmppConnectionService.getPgpEngine() != null) {
xmppConnectionService.getPgpEngine().decrypt(message, new UiCallback<Message>() {
@Override
public void userInputRequried(PendingIntent pi, Message message) {
messages.get(uuid).add(0, message);
decryptingMessages.put(uuid, false);
}
@Override
public void success(Message message) {
xmppConnectionService.updateConversationUi();
decryptMessage(uuid);
}
@Override
public void error(int error, Message message) {
message.setEncryption(Message.ENCRYPTION_DECRYPTION_FAILED);
xmppConnectionService.updateConversationUi();
decryptMessage(uuid);
}
});
} else {
decryptingMessages.put(uuid, false);
}
}
}
private void decryptDirectly(final Message message) {
if (message.getEncryption() == Message.ENCRYPTION_PGP && xmppConnectionService.getPgpEngine() != null) {
xmppConnectionService.getPgpEngine().decrypt(message, new UiCallback<Message>() {
@Override
public void userInputRequried(PendingIntent pi, Message message) {
store(message);
}
@Override
public void success(Message message) {
xmppConnectionService.updateConversationUi();
xmppConnectionService.getNotificationService().updateNotification(false);
}
@Override
public void error(int error, Message message) {
message.setEncryption(Message.ENCRYPTION_DECRYPTION_FAILED);
xmppConnectionService.updateConversationUi();
}
});
}
}
}
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