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.util.Collection;
007import java.util.HashSet;
008import java.util.LinkedList;
009import java.util.List;
010
011import org.openstreetmap.josm.data.osm.DataSet;
012import org.openstreetmap.josm.data.osm.OsmPrimitive;
013import org.openstreetmap.josm.data.osm.PrimitiveId;
014import org.openstreetmap.josm.data.osm.SimplePrimitiveId;
015import org.openstreetmap.josm.gui.MainApplication;
016import org.openstreetmap.josm.gui.io.DownloadPrimitivesWithReferrersTask;
017import org.openstreetmap.josm.gui.util.GuiHelper;
018import org.openstreetmap.josm.io.remotecontrol.AddTagsDialog;
019import org.openstreetmap.josm.io.remotecontrol.PermissionPrefWithDefault;
020import org.openstreetmap.josm.tools.Logging;
021
022/**
023 * Loads OSM primitives using their ID
024 * similar to the "Download object" dialog (@see DownloadPrimitiveAction}.
025 * For instance, {@code /load_object?objects=n1,w2,r3[&new_layer=false&relation_members=true]}.
026 */
027public class LoadObjectHandler extends RequestHandler {
028
029    /**
030     * The remote control command name used to load objects using their ID.
031     */
032    public static final String command = "load_object";
033
034    private final List<PrimitiveId> ps = new LinkedList<>();
035
036    @Override
037    public String[] getMandatoryParams() {
038        return new String[]{"objects"};
039    }
040
041    @Override
042    public String[] getOptionalParams() {
043        return new String[] {"new_layer", "layer_name", "addtags", "relation_members", "referrers"};
044    }
045
046    @Override
047    public String getUsage() {
048        return "downloads the specified objects from the server";
049    }
050
051    @Override
052    public String[] getUsageExamples() {
053        return new String[] {"/load_object?new_layer=true&objects=w106159509",
054            "/load_object?new_layer=true&objects=r2263653&relation_members=true",
055            "/load_object?objects=n100000&referrers=false"
056        };
057    }
058
059    @Override
060    protected void handleRequest() throws RequestHandlerErrorException, RequestHandlerBadRequestException {
061        if (!PermissionPrefWithDefault.LOAD_DATA.isAllowed()) {
062            Logging.info("RemoteControl: download forbidden by preferences");
063        }
064        if (!ps.isEmpty()) {
065            final boolean newLayer = isLoadInNewLayer();
066            final boolean relationMembers = Boolean.parseBoolean(args.get("relation_members"));
067            final boolean referrers = Boolean.parseBoolean(args.get("referrers"));
068            final DownloadPrimitivesWithReferrersTask task = new DownloadPrimitivesWithReferrersTask(
069                    newLayer, ps, referrers, relationMembers, args.get("layer_name"), null);
070            MainApplication.worker.submit(task);
071            MainApplication.worker.submit(() -> {
072                final List<PrimitiveId> downloaded = task.getDownloadedId();
073                final DataSet ds = MainApplication.getLayerManager().getEditDataSet();
074                if (downloaded != null) {
075                    GuiHelper.runInEDT(() -> ds.setSelected(downloaded));
076                    Collection<OsmPrimitive> downlPrim = new HashSet<>();
077                    for (PrimitiveId id : downloaded) {
078                        downlPrim.add(ds.getPrimitiveById(id));
079                    }
080                    AddTagsDialog.addTags(args, sender, downlPrim);
081                }
082                ps.clear();
083            });
084        }
085    }
086
087    @Override
088    public String getPermissionMessage() {
089        return tr("Remote Control has been asked to load objects (specified by their id) from the API.");
090    }
091
092    @Override
093    public PermissionPrefWithDefault getPermissionPref() {
094        return PermissionPrefWithDefault.LOAD_DATA;
095    }
096
097    @Override
098    protected void validateRequest() throws RequestHandlerBadRequestException {
099        ps.clear();
100        for (String i : (args != null ? args.get("objects") : "").split(",\\s*")) {
101            if (!i.isEmpty()) {
102                try {
103                    ps.add(SimplePrimitiveId.fromString(i));
104                } catch (IllegalArgumentException e) {
105                    Logging.log(Logging.LEVEL_WARN, "RemoteControl: invalid selection '"+i+"' ignored.", e);
106                }
107            }
108        }
109    }
110}