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/*******************************************************************************
* Copyright (c) 2004, 2007 Mylyn project committers and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*******************************************************************************/
package org.eclipse.mylyn.internal.tasks.ui;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.core.runtime.Status;
import org.eclipse.mylyn.commons.core.StatusHandler;
import org.eclipse.mylyn.context.core.ContextCore;
import org.eclipse.mylyn.internal.tasks.core.TaskDataStorageManager;
import org.eclipse.mylyn.internal.tasks.core.data.FileTaskAttachmentSource;
import org.eclipse.mylyn.tasks.core.AbstractAttachmentHandler;
import org.eclipse.mylyn.tasks.core.AbstractRepositoryConnector;
import org.eclipse.mylyn.tasks.core.AbstractTask;
import org.eclipse.mylyn.tasks.core.FileAttachment;
import org.eclipse.mylyn.tasks.core.RepositoryAttachment;
import org.eclipse.mylyn.tasks.core.RepositoryStatus;
import org.eclipse.mylyn.tasks.core.RepositoryTaskData;
import org.eclipse.mylyn.tasks.core.TaskRepository;
import org.eclipse.mylyn.tasks.core.AbstractTask.SynchronizationState;
import org.eclipse.mylyn.tasks.core.data.AbstractTaskAttachmentHandler;
import org.eclipse.mylyn.tasks.core.data.ITaskAttachment2;
import org.eclipse.mylyn.tasks.core.data.TaskAttribute;
/**
* @author Steffen Pingel
*/
public class AttachmentUtil {
private static final String CONTEXT_DESCRIPTION = "mylyn/context/zip";
private static final String CONTEXT_DESCRIPTION_LEGACY = "mylar/context/zip";
private static final String CONTEXT_FILENAME = "mylyn-context.zip";
private static final int BUFFER_SIZE = 1024;
/**
* Attaches the associated context to <code>task</code>.
*
* @return false, if operation is not supported by repository
*/
@Deprecated
public static boolean attachContext(AbstractAttachmentHandler attachmentHandler, TaskRepository repository,
AbstractTask task, String longComment, IProgressMonitor monitor) throws CoreException {
ContextCore.getContextManager().saveContext(task.getHandleIdentifier());
final File sourceContextFile = ContextCore.getContextManager().getFileForContext(task.getHandleIdentifier());
SynchronizationState previousState = task.getSynchronizationState();
if (sourceContextFile != null && sourceContextFile.exists()) {
try {
task.setSubmitting(true);
task.setSynchronizationState(SynchronizationState.OUTGOING);
FileAttachment attachment = new FileAttachment(sourceContextFile);
attachment.setDescription(CONTEXT_DESCRIPTION);
attachment.setFilename(CONTEXT_FILENAME);
attachmentHandler.uploadAttachment(repository, task, attachment, longComment, monitor);
} catch (CoreException e) {
// TODO: Calling method should be responsible for returning
// state of task. Wizard will have different behaviour than
// editor.
task.setSynchronizationState(previousState);
throw e;
} catch (OperationCanceledException e) {
return true;
}
}
return true;
}
public static boolean postContext(AbstractRepositoryConnector connector, TaskRepository repository,
AbstractTask task, String comment, IProgressMonitor monitor) throws CoreException {
AbstractTaskAttachmentHandler attachmentHandler = connector.getTaskAttachmentHandler();
ContextCore.getContextManager().saveContext(task.getHandleIdentifier());
File file = ContextCore.getContextManager().getFileForContext(task.getHandleIdentifier());
if (file != null && file.exists()) {
FileTaskAttachmentSource attachment = new FileTaskAttachmentSource(file);
attachment.setDescription(CONTEXT_DESCRIPTION);
attachment.setName(CONTEXT_FILENAME);
attachmentHandler.postContent(repository, task, attachment, comment, null, monitor);
return true;
}
return false;
}
/**
* Implementors of this repositoryOperations must perform it locally without going to the server since it is used
* for frequent repositoryOperations such as decoration.
*
* @return an empty set if no contexts
*/
public static Set<RepositoryAttachment> getContextAttachments(TaskRepository repository, AbstractTask task) {
TaskDataStorageManager taskDataManager = TasksUiPlugin.getTaskDataStorageManager();
Set<RepositoryAttachment> contextAttachments = new HashSet<RepositoryAttachment>();
if (taskDataManager != null) {
RepositoryTaskData newData = taskDataManager.getNewTaskData(task.getRepositoryUrl(), task.getTaskId());
if (newData != null) {
for (RepositoryAttachment attachment : newData.getAttachments()) {
if (attachment.getDescription().equals(CONTEXT_DESCRIPTION)) {
contextAttachments.add(attachment);
} else if (attachment.getDescription().equals(CONTEXT_DESCRIPTION_LEGACY)) {
contextAttachments.add(attachment);
}
}
}
}
return contextAttachments;
}
public static boolean hasContext(TaskRepository repository, AbstractTask task) {
if (repository == null || task == null) {
return false;
} else {
Set<RepositoryAttachment> remoteContextAttachments = getContextAttachments(repository, task);
return (remoteContextAttachments != null && remoteContextAttachments.size() > 0);
}
}
@Deprecated
public static boolean isContext(RepositoryAttachment attachment) {
return CONTEXT_DESCRIPTION.equals(attachment.getDescription())
|| CONTEXT_DESCRIPTION_LEGACY.equals(attachment.getDescription());
}
public static boolean isContext(ITaskAttachment2 attachment) {
return CONTEXT_DESCRIPTION.equals(attachment.getDescription())
|| CONTEXT_DESCRIPTION_LEGACY.equals(attachment.getDescription());
}
/**
* Retrieves a context stored in <code>attachment</code> from <code>task</code>.
*
* @return false, if operation is not supported by repository
*/
@Deprecated
public static boolean retrieveContext(AbstractAttachmentHandler attachmentHandler, TaskRepository repository,
AbstractTask task, RepositoryAttachment attachment, String destinationPath, IProgressMonitor monitor)
throws CoreException {
File destinationContextFile = ContextCore.getContextManager().getFileForContext(task.getHandleIdentifier());
// TODO: add functionality for not overwriting previous context
if (destinationContextFile.exists()) {
if (!destinationContextFile.delete()) {
return false;
}
}
FileOutputStream out;
try {
out = new FileOutputStream(destinationContextFile);
try {
attachmentHandler.downloadAttachment(repository, attachment, out, monitor);
} finally {
try {
out.close();
} catch (IOException e) {
StatusHandler.log(new Status(IStatus.ERROR, TasksUiPlugin.ID_PLUGIN, "Error closing context file",
e));
}
}
} catch (FileNotFoundException e) {
throw new CoreException(new RepositoryStatus(IStatus.ERROR, TasksUiPlugin.ID_PLUGIN,
RepositoryStatus.ERROR_INTERNAL, "Could not create context file", e));
}
return true;
}
public static boolean getContext(AbstractRepositoryConnector connector, TaskRepository repository,
AbstractTask task, TaskAttribute attribute, IProgressMonitor monitor) throws CoreException {
AbstractTaskAttachmentHandler attachmentHandler = connector.getTaskAttachmentHandler();
File file = ContextCore.getContextManager().getFileForContext(task.getHandleIdentifier());
try {
FileOutputStream out = new FileOutputStream(file);
try {
InputStream in = attachmentHandler.getContent(repository, task, attribute, monitor);
try {
int len;
byte[] buffer = new byte[BUFFER_SIZE];
while ((len = in.read(buffer)) != -1) {
out.write(buffer, 0, len);
}
} finally {
in.close();
}
} finally {
out.close();
}
} catch (IOException e) {
throw new CoreException(new RepositoryStatus(IStatus.ERROR, TasksUiPlugin.ID_PLUGIN,
RepositoryStatus.ERROR_INTERNAL, "Could not create context file", e));
}
return true;
}
}
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