cleanup for clear conversation history. small otr fixes

src/eu/siacs/conversations/persistance/DatabaseBackend.java

@@ -332,4 +332,22 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 		cursor.moveToFirst();
 		return Account.fromCursor(cursor);
 	}
+
+	public List<Message> getImageMessages(Conversation conversation) {
+		ArrayList<Message> list = new ArrayList<Message>();
+		SQLiteDatabase db = this.getReadableDatabase();
+		Cursor cursor;
+			String[] selectionArgs = { conversation.getUuid(), String.valueOf(Message.TYPE_IMAGE) };
+			cursor = db.query(Message.TABLENAME, null, Message.CONVERSATION
+					+ "=? AND "+Message.TYPE+"=?", selectionArgs, null, null,null);
+		if (cursor.getCount() > 0) {
+			cursor.moveToLast();
+			do {
+				Message message = Message.fromCursor(cursor);
+				message.setConversation(conversation);
+				list.add(message);
+			} while (cursor.moveToPrevious());
+		}
+		return list;
+	}
 }

src/eu/siacs/conversations/persistance/FileBackend.java

@@ -28,7 +28,6 @@ import android.util.Base64OutputStream;
 import android.util.Log;
 import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
-import eu.siacs.conversations.entities.Conversation;
 import eu.siacs.conversations.entities.DownloadableFile;
 import eu.siacs.conversations.entities.Message;
 import eu.siacs.conversations.services.XmppConnectionService;
@@ -215,27 +214,6 @@ public class FileBackend {
 		return thumbnail;
 	}
 
-	public void removeFiles(Conversation conversation) {
-		String prefix = mXmppConnectionService.getFilesDir().getAbsolutePath();
-		String path = prefix + "/" + conversation.getAccount().getJid() + "/"
-				+ conversation.getContactJid();
-		File file = new File(path);
-		try {
-			this.deleteFile(file);
-		} catch (IOException e) {
-			Log.d(Config.LOGTAG,
-					"error deleting file: " + file.getAbsolutePath());
-		}
-	}
-
-	private void deleteFile(File f) throws IOException {
-		if (f.isDirectory()) {
-			for (File c : f.listFiles())
-				deleteFile(c);
-		}
-		f.delete();
-	}
-
 	public Uri getTakePhotoUri() {
 		StringBuilder pathBuilder = new StringBuilder();
 		pathBuilder.append(Environment

src/eu/siacs/conversations/services/AvatarService.java

@@ -4,7 +4,6 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.Locale;
 
-import eu.siacs.conversations.Config;
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Bookmark;
 import eu.siacs.conversations.entities.Contact;

src/eu/siacs/conversations/services/XmppConnectionService.java

@@ -567,13 +567,14 @@ public class XmppConnectionService extends Service {
 								&& conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
 							mJingleConnectionManager
 									.createNewConnection(message);
-						} else if (message.getPresence() == null) {
-							message.setStatus(Message.STATUS_WAITING);
 						}
 					} else {
 						mJingleConnectionManager.createNewConnection(message);
 					}
 				} else {
+					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
+						conv.startOtrIfNeeded();
+					}
 					message.setStatus(Message.STATUS_WAITING);
 				}
 			} else {
@@ -590,6 +591,7 @@ public class XmppConnectionService extends Service {
 						send = true;
 
 					} else if (message.getPresence() == null) {
+						conv.startOtrIfNeeded();
 						message.setStatus(Message.STATUS_WAITING);
 					}
 				} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
@@ -991,7 +993,6 @@ public class XmppConnectionService extends Service {
 
 	public void clearConversationHistory(Conversation conversation) {
 		this.databaseBackend.deleteMessagesInConversation(conversation);
-		this.fileBackend.removeFiles(conversation);
 		conversation.getMessages().clear();
 		updateConversationUi();
 	}