root / src / gr / ebs / gss / client / FileUploadDialog.java @ 783db80b
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/*
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* Copyright 2007, 2008, 2009 Electronic Business Systems Ltd.
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*
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* This file is part of GSS.
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*
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* GSS is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GSS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GSS. If not, see <http://www.gnu.org/licenses/>.
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*/
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package gr.ebs.gss.client; |
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import gr.ebs.gss.client.rest.GetCommand; |
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import gr.ebs.gss.client.rest.PostCommand; |
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import gr.ebs.gss.client.rest.RestCommand; |
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import gr.ebs.gss.client.rest.RestException; |
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import gr.ebs.gss.client.rest.resource.FileResource; |
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import gr.ebs.gss.client.rest.resource.FolderResource; |
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import gr.ebs.gss.client.rest.resource.UploadStatusResource; |
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import java.util.ArrayList; |
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import java.util.List; |
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import com.google.gwt.core.client.GWT; |
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import com.google.gwt.dom.client.NativeEvent; |
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import com.google.gwt.event.dom.client.ClickEvent; |
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import com.google.gwt.event.dom.client.ClickHandler; |
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import com.google.gwt.event.dom.client.KeyCodes; |
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import com.google.gwt.http.client.URL; |
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import com.google.gwt.json.client.JSONObject; |
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import com.google.gwt.json.client.JSONString; |
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import com.google.gwt.user.client.DeferredCommand; |
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import com.google.gwt.user.client.Event.NativePreviewEvent; |
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import com.google.gwt.user.client.Timer; |
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import com.google.gwt.user.client.ui.Button; |
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import com.google.gwt.user.client.ui.DialogBox; |
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import com.google.gwt.user.client.ui.FileUpload; |
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import com.google.gwt.user.client.ui.FormPanel; |
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import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteEvent; |
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import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteHandler; |
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import com.google.gwt.user.client.ui.FormPanel.SubmitEvent; |
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import com.google.gwt.user.client.ui.FormPanel.SubmitHandler; |
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import com.google.gwt.user.client.ui.Grid; |
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import com.google.gwt.user.client.ui.HTML; |
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import com.google.gwt.user.client.ui.HasHorizontalAlignment; |
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import com.google.gwt.user.client.ui.Hidden; |
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import com.google.gwt.user.client.ui.HorizontalPanel; |
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import com.google.gwt.user.client.ui.Label; |
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import com.google.gwt.user.client.ui.VerticalPanel; |
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/**
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* The 'File upload' dialog box implementation.
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*/
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public class FileUploadDialog extends DialogBox implements Updateable { |
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protected int prgBarInterval = 1500; |
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private ProgressBar progressBar;
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protected RepeatingTimer repeater = new RepeatingTimer(this, prgBarInterval); |
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public static final boolean DONE = true; |
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/**
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* The Form element that performs the file upload.
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*/
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private final FormPanel form = new FormPanel(); |
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private final FileUpload upload = new FileUpload(); |
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protected final Label filenameLabel = new Label(""); |
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protected List<FileResource> files; |
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protected boolean cancelEvent = false; |
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protected String fileNameToUse; |
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protected FolderResource folder;
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/**
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* The widget's constructor.
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*/
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public FileUploadDialog() {
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// Set the dialog's caption.
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setText("File upload");
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setAnimationEnabled(true);
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// Since we're going to add a FileUpload widget, we'll need to set the
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// form to use the POST method, and multipart MIME encoding.
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form.setEncoding(FormPanel.ENCODING_MULTIPART); |
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form.setMethod(FormPanel.METHOD_POST); |
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// Create a panel to hold all of the form widgets.
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VerticalPanel panel = new VerticalPanel();
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form.setWidget(panel); |
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final HTML info = new HTML("You may select a file to upload. Install" + |
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" <a href='http://gears.google.com/' target='_blank'>Google " +
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"Gears</a><br> for uploading multiple files simultaneously.");
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info.addStyleName("gss-uploadNote");
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panel.add(info); |
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final Hidden date = new Hidden("Date", ""); |
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panel.add(date); |
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final Hidden auth = new Hidden("Authorization", ""); |
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panel.add(auth); |
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// Add an informative label with the folder name.
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Object selection = GSS.get().getFolders().getCurrent().getUserObject();
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folder = (FolderResource) selection; |
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upload.setName("file");
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filenameLabel.setText("");
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filenameLabel.setVisible(false);
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filenameLabel.setStyleName("props-labels");
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HorizontalPanel fileUloadPanel = new HorizontalPanel();
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fileUloadPanel.add(filenameLabel); |
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fileUloadPanel.add(upload); |
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Grid generalTable = new Grid(2, 2); |
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generalTable.setText(0, 0, "Folder"); |
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generalTable.setText(1, 0, "File"); |
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generalTable.setText(0, 1, folder.getName()); |
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generalTable.setWidget(1, 1, fileUloadPanel); |
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generalTable.getCellFormatter().setStyleName(0, 0, "props-labels"); |
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generalTable.getCellFormatter().setStyleName(1, 0, "props-labels"); |
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generalTable.getCellFormatter().setStyleName(0, 1, "props-values"); |
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generalTable.getCellFormatter().setStyleName(1, 1, "props-values"); |
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generalTable.setCellSpacing(4);
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panel.add(generalTable); |
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// Create a panel to hold the buttons.
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HorizontalPanel buttons = new HorizontalPanel();
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// Create the 'upload' button, along with a listener that submits the
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// form.
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final Button submit = new Button("Upload", new ClickHandler() { |
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@Override
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public void onClick(ClickEvent event) { |
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prepareAndSubmit(); |
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} |
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}); |
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buttons.add(submit); |
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buttons.setCellHorizontalAlignment(submit, HasHorizontalAlignment.ALIGN_CENTER); |
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// Create the 'Cancel' button, along with a listener that hides the
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// dialog when the button is clicked.
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final Button cancel = new Button("Cancel", new ClickHandler() { |
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@Override
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public void onClick(ClickEvent event) { |
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repeater.finish(); |
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hide(); |
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} |
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}); |
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buttons.add(cancel); |
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buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER); |
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buttons.setSpacing(8);
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buttons.addStyleName("gss-DialogBox");
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// Add an event handler to the form.
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form.addSubmitHandler(new SubmitHandler() {
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@Override
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public void onSubmit(SubmitEvent event) { |
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GSS app = GSS.get(); |
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// This event is fired just before the form is submitted. We can
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// take this opportunity to perform validation.
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if (upload.getFilename().length() == 0) { |
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app.displayError("You must select a file!");
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event.cancel(); |
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hide(); |
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} else {
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canContinue(); |
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GWT.log("Cancel:" + cancelEvent, null); |
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if (cancelEvent) {
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cancelEvent = false;
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app.displayError("The specified file name already exists in this folder");
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event.cancel(); |
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hide(); |
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} else {
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fileNameToUse = getFilename(upload.getFilename()); |
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String apath;
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FileResource selectedFile = getFileForName(fileNameToUse); |
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if (selectedFile == null ) { |
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//we are going to create a file
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apath = folder.getUri(); |
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if (!apath.endsWith("/")) |
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apath = apath + "/";
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apath = apath + encodeComponent(fileNameToUse); |
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} else
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apath = selectedFile.getUri(); |
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form.setAction(apath); |
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String dateString = RestCommand.getDate();
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String resource = apath.substring(app.getApiPath().length() - 1, apath.length()); |
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String sig = RestCommand.calculateSig("POST", dateString, resource, RestCommand.base64decode(app.getToken())); |
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date.setValue(dateString); |
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auth.setValue(app.getCurrentUserResource().getUsername() + " " + sig);
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GWT.log("FolderPATH:" + folder.getUri(), null); |
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submit.setEnabled(false);
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upload.setVisible(false);
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filenameLabel.setText(fileNameToUse); |
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filenameLabel.setVisible(true);
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repeater.start(); |
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progressBar.setVisible(true);
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} |
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} |
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} |
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}); |
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form.addSubmitCompleteHandler(new SubmitCompleteHandler() {
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@Override
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public void onSubmitComplete(SubmitCompleteEvent event) { |
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// When the form submission is successfully completed, this
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// event is fired. Assuming the service returned a response
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// of type text/html, we can get the result text here (see
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// the FormPanel documentation for further explanation).
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String results = event.getResults();
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// Unfortunately the results are never empty, even in
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// the absense of errors, so we have to check for '<pre></pre>'.
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if (!results.equalsIgnoreCase("<pre></pre>")) { |
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GWT.log(results, null);
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GSS.get().displayError(results); |
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} |
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progressBar.setProgress(100);
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cancelUpload(); |
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GSS.get().showFileList(true);
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GSS.get().getStatusPanel().updateStats(); |
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} |
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}); |
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panel.add(buttons); |
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progressBar = new ProgressBar(50, ProgressBar.SHOW_TIME_REMAINING); |
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panel.add(progressBar); |
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progressBar.setVisible(false);
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panel.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER); |
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panel.setCellHorizontalAlignment(progressBar, HasHorizontalAlignment.ALIGN_CENTER); |
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panel.addStyleName("gss-DialogBox");
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addStyleName("gss-DialogBox");
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setWidget(form); |
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} |
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@Override
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protected void onPreviewNativeEvent(NativePreviewEvent preview) { |
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super.onPreviewNativeEvent(preview);
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NativeEvent evt = preview.getNativeEvent(); |
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if (evt.getType().equals("keydown")) |
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// Use the popup's key preview hooks to close the dialog when either
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// enter or escape is pressed.
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switch (evt.getKeyCode()) {
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case KeyCodes.KEY_ENTER:
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prepareAndSubmit(); |
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break;
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case KeyCodes.KEY_ESCAPE:
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cancelUpload(); |
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break;
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} |
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} |
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/**
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* Cancels the file upload.
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*/
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private void cancelUpload() { |
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repeater.finish(); |
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hide(); |
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} |
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/**
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* Make any last minute checks and start the upload.
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*/
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public void prepareAndSubmit() { |
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final String fname = getFilename(upload.getFilename()); |
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if (getFileForName(fname) == null) { |
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//we are going to create a file, so we check to see if there is a trashed file with the same name
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FileResource same = null;
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for (FileResource fres : folder.getFiles())
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if (fres.isDeleted() && fres.getName().equals(fname))
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same = fres; |
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if (same == null) |
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form.submit(); |
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else {
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final FileResource sameFile = same;
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GWT.log("Same deleted file", null); |
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ConfirmationDialog confirm = new ConfirmationDialog("A file with " + |
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"the same name exists in the trash. If you continue,<br/>the trashed " +
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"file '" + fname + "' will be renamed automatically for you.", "Continue") { |
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@Override
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public void cancel() { |
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FileUploadDialog.this.hide(); |
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} |
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@Override
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public void confirm() { |
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updateTrashedFile(getBackupFilename(fname), sameFile); |
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} |
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}; |
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confirm.center(); |
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} |
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} |
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else {
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// We are going to update an existing file, so show a confirmation dialog.
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ConfirmationDialog confirm = new ConfirmationDialog("Are you sure " + |
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"you want to update " + fname + "?", "Update") { |
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@Override
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public void cancel() { |
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FileUploadDialog.this.hide(); |
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} |
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@Override
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public void confirm() { |
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form.submit(); |
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} |
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}; |
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confirm.center(); |
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} |
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} |
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/**
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* Returns the file name from a potential full path argument. Apparently IE
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* insists on sending the full path name of a file when uploading, forcing
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* us to trim the extra path info. Since this is only observed on Windows we
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* get to check for a single path separator value.
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*
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* @param name the potentially full path name of a file
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* @return the file name without extra path information
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*/
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protected String getFilename(String name) { |
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int pathSepIndex = name.lastIndexOf("\\"); |
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if (pathSepIndex == -1) { |
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pathSepIndex = name.lastIndexOf("/");
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if (pathSepIndex == -1) |
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return name;
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} |
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return name.substring(pathSepIndex + 1); |
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} |
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/**
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* Check whether the file name exists in selected folder.
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*
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* @return
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*/
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private boolean canContinue() { |
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if (files == null) |
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return false; |
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String fileName = getFilename(upload.getFilename());
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if (getFileForName(fileName) == null) { |
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// For file creation, check to see if the file already exists.
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GWT.log("filename to upload:" + fileName, null); |
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for (FileResource dto : files) {
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GWT.log("Check:" + dto.getName() + "/" + fileName, null); |
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if (!dto.isDeleted() && dto.getName().equals(fileName)) {
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cancelEvent = true;
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return true; |
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} |
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} |
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} |
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return true; |
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} |
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class RepeatingTimer extends Timer { |
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private Updateable updateable;
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private int interval = 1500; |
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private boolean running = true; |
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RepeatingTimer(Updateable _updateable, int _interval) {
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updateable = _updateable; |
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interval = _interval; |
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} |
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@Override
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public void run() { |
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updateable.update(); |
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} |
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public void start() { |
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running = true;
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scheduleRepeating(interval); |
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} |
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public void finish() { |
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running = false;
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cancel(); |
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} |
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public int getInterval() { |
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return interval;
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} |
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public void setInterval(int anInterval) { |
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if (interval != anInterval) {
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interval = anInterval; |
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if (running) {
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finish(); |
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start(); |
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} |
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} |
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} |
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} |
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@Override
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public void update() { |
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String apath = folder.getUri();
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if (!apath.endsWith("/")) |
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apath = apath + "/";
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apath = apath + encodeComponent(fileNameToUse) + "?progress=" + encodeComponent(fileNameToUse);
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GetCommand eg = new GetCommand<UploadStatusResource>(UploadStatusResource.class, apath, false, null) { |
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@Override
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public void onComplete() { |
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UploadStatusResource res = getResult(); |
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progressBar.setProgress(res.percent()); |
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} |
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@Override
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public void onError(Throwable t) { |
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GWT.log("", t);
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} |
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}; |
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DeferredCommand.addCommand(eg); |
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} |
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protected String getBackupFilename(String filename) { |
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List<FileResource> filesInSameFolder = new ArrayList<FileResource>(); |
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for (FileResource deleted : folder.getFiles())
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if (deleted.isDeleted())
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filesInSameFolder.add(deleted); |
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int i = 1; |
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for (FileResource same : filesInSameFolder)
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if (same.getName().startsWith(filename)) {
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String toCheck = same.getName().substring(filename.length(), same.getName().length());
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if (toCheck.startsWith(" ")) { |
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int test = -1; |
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try {
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test = Integer.valueOf(toCheck.replace(" ", "")); |
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} catch (NumberFormatException e) { |
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// Do nothing since string is not a number.
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} |
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if (test >= i)
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i = test + 1;
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} |
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} |
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return filename + " " + i; |
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} |
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/**
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* Rename the conflicting trashed file with the supplied new name.
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*/
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private void updateTrashedFile(String newName, FileResource trashedFile) { |
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JSONObject json = new JSONObject();
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json.put("name", new JSONString(newName)); |
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PostCommand cf = new PostCommand(trashedFile.getUri() + "?update=", json.toString(), 200) { |
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@Override
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public void onComplete() { |
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form.submit(); |
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} |
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@Override
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public void onError(Throwable t) { |
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GSS app = GSS.get(); |
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GWT.log("", t);
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if (t instanceof RestException) { |
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int statusCode = ((RestException) t).getHttpStatusCode();
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if (statusCode == 405) |
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app.displayError("You don't have the necessary permissions");
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else if (statusCode == 404) |
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app.displayError("User in permissions does not exist");
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else if (statusCode == 409) |
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app.displayError("A file with the same name already exists");
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else if (statusCode == 413) |
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app.displayError("Your quota has been exceeded");
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else
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app.displayError("Unable to modify file:" + ((RestException) t).getHttpStatusText());
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} else
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app.displayError("System error modifying file:" + t.getMessage());
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} |
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}; |
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DeferredCommand.addCommand(cf); |
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} |
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protected FileResource getFileForName(String name){ |
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for (FileResource f : folder.getFiles())
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if (!f.isDeleted() && f.getName().equals(name))
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return f;
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return null; |
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} |
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|
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|
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/**
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* Same as URL.encodeComponent, but also
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* encode apostrophe since browsers aren't consistent about it
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* (FF encodes, IE does not).
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*/
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private String encodeComponent(String decodedURLComponent) { |
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String retv = URL.encodeComponent(decodedURLComponent); |
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retv = retv.replaceAll("'", "%27"); |
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return retv;
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} |
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|
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/**
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* Modify the files.
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*
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* @param newFiles the files to set
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*/
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public void setFiles(List<FileResource> newFiles) { |
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files = newFiles; |
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} |
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} |