source: josm/trunk/src/org/openstreetmap/josm/data/imagery/ImageryLayerInfo.java@ 3715

package org.openstreetmap.josm.data.imagery;

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

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.io.MirroredInputStream;

public class ImageryLayerInfo {
    public static final ImageryLayerInfo instance = new ImageryLayerInfo();
    ArrayList<ImageryInfo> layers = new ArrayList<ImageryInfo>();
    ArrayList<ImageryInfo> defaultLayers = new ArrayList<ImageryInfo>();
    private final static String[] DEFAULT_LAYER_SITES
    = { "http://josm.openstreetmap.de/maps"};

    public void load() {
        layers.clear();
        Collection<String> defaults = Main.pref.getCollection(
                "imagery.layers.default", Collections.<String>emptySet());
        for(Collection<String> c : Main.pref.getArray("imagery.layers",
                Collections.<Collection<String>>emptySet())) {
            layers.add(new ImageryInfo(c));
        }

        ArrayList<String> defaultsSave = new ArrayList<String>();
        for(String source : Main.pref.getCollection("imagery.layers.sites", Arrays.asList(DEFAULT_LAYER_SITES)))
        {
            try
            {
                MirroredInputStream s = new MirroredInputStream(source, -1);
                InputStreamReader r;
                try
                {
                    r = new InputStreamReader(s, "UTF-8");
                }
                catch (UnsupportedEncodingException e)
                {
                    r = new InputStreamReader(s);
                }
                BufferedReader reader = new BufferedReader(r);
                String line;
                while((line = reader.readLine()) != null)
                {
                    String val[] = line.split(";");
                    if(!line.startsWith("#") && (val.length == 3 || val.length == 4)) {
                        boolean force = "true".equals(val[0]);
                        String name = tr(val[1]);
                        String url = val[2];
                        String eulaAcceptanceRequired = null;
                        if (val.length == 4) {
                            // 4th parameter optional for license agreement (EULA)
                            eulaAcceptanceRequired = val[3];
                        }
                        defaultLayers.add(new ImageryInfo(name, url, eulaAcceptanceRequired));

                        if(force) {
                            defaultsSave.add(url);
                            if(!defaults.contains(url)) {
                                for(ImageryInfo i : layers) {
                                    if(url.equals(i.url)) {
                                        force = false;
                                    }
                                }
                                if(force) {
                                    layers.add(new ImageryInfo(name, url));
                                }
                            }
                        }
                    }
                }
            }
            catch (IOException e)
            {
            }
        }

        Main.pref.putCollection("imagery.layers.default", defaultsSave.size() > 0
                ? defaultsSave : defaults);
        Collections.sort(layers);
        save();
    }

    public void add(ImageryInfo info) {
        layers.add(info);
    }

    public void remove(ImageryInfo info) {
        layers.remove(info);
    }

    public void save() {
        LinkedList<Collection<String>> coll = new LinkedList<Collection<String>>();
        for (ImageryInfo info : layers) {
            coll.add(info.getInfoArray());
        }
        Main.pref.putArray("imagery.layers", coll);
    }

    public List<ImageryInfo> getLayers() {
        return Collections.unmodifiableList(layers);
    }

    public List<ImageryInfo> getDefaultLayers() {
        return Collections.unmodifiableList(defaultLayers);
    }

    public static void addLayer(ImageryInfo info) {
        instance.add(info);
        instance.save();
        Main.main.menu.imageryMenuUpdater.refreshImageryMenu();
    }
}