001// License: GPL. For details, see LICENSE file.
002package org.openstreetmap.josm.io.remotecontrol.handler;
003
004import static org.openstreetmap.josm.tools.I18n.tr;
005
006import java.awt.Point;
007import java.util.Collections;
008import java.util.Map;
009
010import org.openstreetmap.josm.Main;
011import org.openstreetmap.josm.actions.AutoScaleAction;
012import org.openstreetmap.josm.command.AddCommand;
013import org.openstreetmap.josm.data.coor.LatLon;
014import org.openstreetmap.josm.data.osm.Node;
015import org.openstreetmap.josm.data.osm.OsmPrimitive;
016import org.openstreetmap.josm.gui.util.GuiHelper;
017import org.openstreetmap.josm.io.remotecontrol.AddTagsDialog;
018import org.openstreetmap.josm.io.remotecontrol.PermissionPrefWithDefault;
019
020/**
021 * Handler for add_node request.
022 */
023public class AddNodeHandler extends RequestHandler {
024
025    /**
026     * The remote control command name used to add a node.
027     */
028    public static final String command = "add_node";
029
030    private double lat;
031    private double lon;
032
033    @Override
034    protected void handleRequest() {
035        GuiHelper.runInEDTAndWait(() -> addNode(args));
036    }
037
038    @Override
039    public String[] getMandatoryParams() {
040        return new String[] {"lat", "lon"};
041    }
042
043    @Override
044    public String[] getOptionalParams() {
045        return new String[] {"addtags"};
046    }
047
048    @Override
049    public String getUsage() {
050        return "adds a node (given by its latitude and longitude) to the current dataset";
051    }
052
053    @Override
054    public String[] getUsageExamples() {
055        return new String[] {
056            "/add_node?lat=11&lon=22",
057            "/add_node?lon=13.3&lat=53.2&addtags=natural=tree|name=%20%20%20==Great%20Oak=="
058        };
059    }
060
061    @Override
062    public String getPermissionMessage() {
063        return tr("Remote Control has been asked to create a new node.") +
064                "<br>" + tr("Coordinates: ") + args.get("lat") + ", " + args.get("lon");
065    }
066
067    @Override
068    public PermissionPrefWithDefault getPermissionPref() {
069        return PermissionPrefWithDefault.CREATE_OBJECTS;
070    }
071
072    /**
073     * Adds a node, implements the GET /add_node?lon=...&amp;lat=... request.
074     * @param args request arguments
075     */
076    private void addNode(Map<String, String> args) {
077
078        // Parse the arguments
079        Main.info("Adding node at (" + lat + ", " + lon + ')');
080
081        // Create a new node
082        LatLon ll = new LatLon(lat, lon);
083
084        Node node = null;
085
086        if (Main.isDisplayingMapView()) {
087            Point p = Main.map.mapView.getPoint(ll);
088            node = Main.map.mapView.getNearestNode(p, OsmPrimitive::isUsable);
089            if (node != null && node.getCoor().greatCircleDistance(ll) > Main.pref.getDouble("remotecontrol.tolerance", 0.1)) {
090                node = null; // node is too far
091            }
092        }
093
094        if (node == null) {
095            node = new Node(ll);
096            // Now execute the commands to add this node.
097            Main.main.undoRedo.add(new AddCommand(node));
098        }
099
100        Main.getLayerManager().getEditDataSet().setSelected(node);
101        if (PermissionPrefWithDefault.CHANGE_VIEWPORT.isAllowed()) {
102            AutoScaleAction.autoScale("selection");
103        } else {
104            Main.map.mapView.repaint();
105        }
106        // parse parameter addtags=tag1=value1|tag2=vlaue2
107        AddTagsDialog.addTags(args, sender, Collections.singleton(node));
108    }
109
110    @Override
111    protected void validateRequest() throws RequestHandlerBadRequestException {
112        try {
113            lat = Double.parseDouble(args != null ? args.get("lat") : "");
114            lon = Double.parseDouble(args != null ? args.get("lon") : "");
115        } catch (NumberFormatException e) {
116            throw new RequestHandlerBadRequestException("NumberFormatException ("+e.getMessage()+')', e);
117        }
118        if (Main.getLayerManager().getEditLayer() == null) {
119             throw new RequestHandlerBadRequestException(tr("There is no layer opened to add node"));
120        }
121    }
122}