source: josm/src/org/openstreetmap/josm/actions/UploadAction.java@ 283

package org.openstreetmap.josm.actions;

import static org.openstreetmap.josm.tools.I18n.tr;

import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.util.Collection;
import java.util.LinkedList;

import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.data.osm.OsmPrimitive;
import org.openstreetmap.josm.gui.OsmPrimitivRenderer;
import org.openstreetmap.josm.gui.PleaseWaitRunnable;
import org.openstreetmap.josm.io.OsmServerWriter;
import org.openstreetmap.josm.tools.GBC;
import org.xml.sax.SAXException;

/**
 * Action that opens a connection to the osm server and upload all changes.
 *
 * An dialog is displayed asking the user to specify a rectangle to grab.
 * The url and account settings from the preferences are used.
 *
 * @author imi
 */
public class UploadAction extends JosmAction {
        
        /** Upload Hook */
        public interface UploadHook {
                /**
                 * Checks the upload.
                 * @param add The added primitives
                 * @param update The updated primitives
                 * @param delete The deleted primitives
                 * @return true, if the upload can continue
                 */
                public boolean checkUpload(Collection<OsmPrimitive> add, Collection<OsmPrimitive> update, Collection<OsmPrimitive> delete);
        }
        
        /**
         * The list of upload hooks. These hooks will be called one after the other
         * when the user wants to upload data. Plugins can insert their own hooks here
         * if they want to be able to veto an upload.
         * 
         * Be dafault, the standard upload dialog is the only element in the list.
         * Plugins shold normally insert their code before that, so that the upload
         * dialog is the last thing shown before upload really starts; on occasion
         * however, a plugin might also want to insert something after that.
         */
        public final LinkedList<UploadHook> uploadHooks = new LinkedList<UploadHook>();

        public UploadAction() {
                super(tr("Upload to OSM"), "upload", tr("Upload all changes to the OSM server."), KeyEvent.VK_U, InputEvent.CTRL_DOWN_MASK | InputEvent.SHIFT_DOWN_MASK, true);

                /**
                 * Displays a screen where the actions that would be taken are displayed and
                 * give the user the possibility to cancel the upload.
                 */
                uploadHooks.add(new UploadHook() {
                        public boolean checkUpload(Collection<OsmPrimitive> add, Collection<OsmPrimitive> update, Collection<OsmPrimitive> delete) {

                                JPanel p = new JPanel(new GridBagLayout());

                                OsmPrimitivRenderer renderer = new OsmPrimitivRenderer();

                                if (!add.isEmpty()) {
                                        p.add(new JLabel(tr("Objects to add:")), GBC.eol());
                                        JList l = new JList(add.toArray());
                                        l.setCellRenderer(renderer);
                                        l.setVisibleRowCount(l.getModel().getSize() < 6 ? l.getModel().getSize() : 10);
                                        p.add(new JScrollPane(l), GBC.eol().fill());
                                }

                                if (!update.isEmpty()) {
                                        p.add(new JLabel(tr("Objects to modify:")), GBC.eol());
                                        JList l = new JList(update.toArray());
                                        l.setCellRenderer(renderer);
                                        l.setVisibleRowCount(l.getModel().getSize() < 6 ? l.getModel().getSize() : 10);
                                        p.add(new JScrollPane(l), GBC.eol().fill());
                                }

                                if (!delete.isEmpty()) {
                                        p.add(new JLabel(tr("Objects to delete:")), GBC.eol());
                                        JList l = new JList(delete.toArray());
                                        l.setCellRenderer(renderer);
                                        l.setVisibleRowCount(l.getModel().getSize() < 6 ? l.getModel().getSize() : 10);
                                        p.add(new JScrollPane(l), GBC.eol().fill());
                                }

                                return JOptionPane.showConfirmDialog(Main.parent, p, tr("Upload these changes?"),
                                                JOptionPane.YES_NO_OPTION) == JOptionPane.YES_OPTION;
                        }
                });
        }

        public void actionPerformed(ActionEvent e) {
                if (Main.map == null) {
                        JOptionPane.showMessageDialog(Main.parent,tr("Nothing to upload. Get some data first."));
                        return;
                }

                if (!Main.map.conflictDialog.conflicts.isEmpty()) {
                        JOptionPane.showMessageDialog(Main.parent,tr("There are unresolved conflicts. You have to resolve these first."));
                        Main.map.conflictDialog.action.button.setSelected(true);
                        Main.map.conflictDialog.action.actionPerformed(null);
                        return;
                }

                final LinkedList<OsmPrimitive> add = new LinkedList<OsmPrimitive>();
                final LinkedList<OsmPrimitive> update = new LinkedList<OsmPrimitive>();
                final LinkedList<OsmPrimitive> delete = new LinkedList<OsmPrimitive>();
                for (OsmPrimitive osm : Main.ds.allPrimitives()) {
                        if (osm.get("josm/ignore") != null)
                                continue;
                        if (osm.id == 0 && !osm.deleted)
                                add.addLast(osm);
                        else if (osm.modified && !osm.deleted)
                                update.addLast(osm);
                        else if (osm.deleted && osm.id != 0)
                                delete.addFirst(osm);
                }
                
                if (add.isEmpty() && update.isEmpty() && delete.isEmpty()) {
                        JOptionPane.showMessageDialog(Main.parent,tr("No changes to upload."));
                        return;
                }

                // Call all upload hooks in sequence. The upload confirmation dialog
                // is one of these.
                for(UploadHook hook : uploadHooks)
                        if(!hook.checkUpload(add, update, delete))
                                return;
                
                final OsmServerWriter server = new OsmServerWriter();
                final Collection<OsmPrimitive> all = new LinkedList<OsmPrimitive>();
                all.addAll(add);
                all.addAll(update);
                all.addAll(delete);

                PleaseWaitRunnable uploadTask = new PleaseWaitRunnable(tr("Uploading data")){
                        @Override protected void realRun() throws SAXException {
                                server.uploadOsm(all);
                        }
                        @Override protected void finish() {
                                Main.main.editLayer().cleanData(server.processed, !add.isEmpty());
                        }
                        @Override protected void cancel() {
                                server.cancel();
                        }
                };
                Main.worker.execute(uploadTask);
        }
}