/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.mantle.client.solutionbrowser;
import com.google.gwt.core.client.GWT;
import com.google.gwt.http.client.Request;
import com.google.gwt.http.client.RequestBuilder;
import com.google.gwt.http.client.RequestCallback;
import com.google.gwt.http.client.RequestException;
import com.google.gwt.http.client.Response;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import org.pentaho.gwt.widgets.client.filechooser.JsonToRepositoryFileTreeConverter;
import org.pentaho.gwt.widgets.client.filechooser.RepositoryFile;
import org.pentaho.gwt.widgets.client.filechooser.RepositoryFileTree;
import java.util.ArrayList;
import java.util.List;
public class RepositoryFileTreeManager {
public static final String SEPARATOR = "/"; //$NON-NLS-1$
public static final String FOLDER_HOME = "home"; //$NON-NLS-1$
private ArrayList<IRepositoryFileTreeListener> listeners = new ArrayList<IRepositoryFileTreeListener>();
private RepositoryFileTree fileTree;
private List<RepositoryFile> trashItems;
private static RepositoryFileTreeManager instance;
private static boolean fetching = false;
private RepositoryFileTreeManager() {
flagRepositoryFileTreeLoaded( false );
}
private native void flagRepositoryFileTreeLoaded( boolean repositoryFileTreeLoaded )
/*-{
$wnd.mantle_repository_loaded = repositoryFileTreeLoaded;
}-*/;
public static RepositoryFileTreeManager getInstance() {
if ( instance == null ) {
instance = new RepositoryFileTreeManager();
}
return instance;
}
public void addRepositoryFileTreeListener( IRepositoryFileTreeListener listener, Integer depth, String filter,
Boolean showHidden ) {
listeners.add( listener );
synchronized ( RepositoryFileTreeManager.class ) {
if ( !fetching && fileTree == null ) {
fetching = true;
fetchRepositoryFileTree( true, depth, filter, showHidden );
} else {
listener.beforeFetchRepositoryFileTree();
listener.onFetchRepositoryFileTree( fileTree, trashItems );
}
}
}
public void removeRepositoryFileTreeListener( IRepositoryFileTreeListener listener ) {
listeners.remove( listener );
}
private void fireRepositoryFileTreeFetched() {
fetching = false;
for ( IRepositoryFileTreeListener listener : listeners ) {
listener.onFetchRepositoryFileTree( fileTree, trashItems );
}
// flag that we have the document so that other things might start to use it (PDB-500)
flagRepositoryFileTreeLoaded( true );
}
public void beforeFetchRepositoryFileTree() {
for ( IRepositoryFileTreeListener listener : listeners ) {
listener.beforeFetchRepositoryFileTree();
}
}
public void fetchRepositoryFileTree( final boolean forceReload, Integer depth, String filter, Boolean showHidden ) {
if ( forceReload || fileTree == null ) {
fetchRepositoryFileTree( null, depth, filter, showHidden );
}
}
public void fetchRepositoryFileTree( final AsyncCallback<RepositoryFileTree> callback, final boolean forceReload,
Integer depth, String filter, Boolean showHidden ) {
if ( forceReload || fileTree == null ) {
fetchRepositoryFileTree( callback, depth, filter, showHidden );
} else {
callback.onSuccess( fileTree );
}
}
public void fetchRepositoryFileTree( final AsyncCallback<RepositoryFileTree> callback, Integer depth, String filter,
Boolean showHidden ) {
// notify listeners that we are about to talk to the server (in case there's anything they want to do
// such as busy cursor or tree loading indicators)
beforeFetchRepositoryFileTree();
RequestBuilder builder = null;
String url = GWT.getHostPageBaseURL() + "api/repo/files/:/tree?"; //$NON-NLS-1$
if ( depth == null ) {
depth = -1;
}
if ( filter == null ) {
filter = "*"; //$NON-NLS-1$
}
if ( showHidden == null ) {
showHidden = Boolean.FALSE;
}
url =
url
+ "depth=" + depth + "&filter=" + filter + "&showHidden=" + showHidden + "&ts=" + System.currentTimeMillis(); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
builder = new RequestBuilder( RequestBuilder.GET, url );
builder.setHeader( "Accept", "application/json" );
builder.setHeader( "If-Modified-Since", "01 Jan 1970 00:00:00 GMT" );
RequestCallback innerCallback = new RequestCallback() {
public void onError( Request request, Throwable exception ) {
Window.alert( exception.toString() );
}
public void onResponseReceived( Request request, Response response ) {
if ( response.getStatusCode() == Response.SC_OK ) {
String json = response.getText();
System.out.println( json );
final JsonToRepositoryFileTreeConverter converter =
new JsonToRepositoryFileTreeConverter( response.getText() );
fileTree = converter.getTree();
String deletedFilesUrl = GWT.getHostPageBaseURL() + "api/repo/files/deleted?ts=" + System.currentTimeMillis();
RequestBuilder deletedFilesRequestBuilder = new RequestBuilder( RequestBuilder.GET, deletedFilesUrl );
deletedFilesRequestBuilder.setHeader( "Accept", "application/json" );
deletedFilesRequestBuilder.setHeader( "If-Modified-Since", "01 Jan 1970 00:00:00 GMT" );
try {
deletedFilesRequestBuilder.sendRequest( null, new RequestCallback() {
public void onError( Request request, Throwable exception ) {
fireRepositoryFileTreeFetched();
Window.alert( exception.toString() );
}
public void onResponseReceived( Request delRequest, Response delResponse ) {
if ( delResponse.getStatusCode() == Response.SC_OK ) {
try {
trashItems = JsonToRepositoryFileTreeConverter.getTrashFiles( delResponse.getText() );
} catch ( Throwable t ) {
// apparently this happens when you have no trash
}
fireRepositoryFileTreeFetched();
} else {
fireRepositoryFileTreeFetched();
}
}
} );
} catch ( Exception e ) {
fireRepositoryFileTreeFetched();
}
if ( callback != null ) {
callback.onSuccess( fileTree );
}
} else {
fileTree = new RepositoryFileTree();
RepositoryFile errorFile = new RepositoryFile();
errorFile.setFolder( true );
errorFile.setName( "!ERROR!" );
fileTree.setFile( errorFile );
}
}
};
try {
builder.sendRequest( null, innerCallback );
} catch ( RequestException e ) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}