SampleExtensionService.java

/**
 * Copyright (c) 2014-2017 by the respective copyright holders.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */
package org.eclipse.smarthome.core.extension.sample.internal;

import java.net.URI;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Random;

import org.apache.commons.lang.RandomStringUtils;
import org.apache.commons.lang.StringUtils;
import org.eclipse.smarthome.core.events.Event;
import org.eclipse.smarthome.core.events.EventPublisher;
import org.eclipse.smarthome.core.extension.Extension;
import org.eclipse.smarthome.core.extension.ExtensionEventFactory;
import org.eclipse.smarthome.core.extension.ExtensionService;
import org.eclipse.smarthome.core.extension.ExtensionType;

/**
 * This is an implementation of an {@link ExtensionService} that can be used as a dummy service for testing the
 * functionality.
 * It is not meant to be used anywhere productively.
 *
 * @author Kai Kreuzer - Initial contribution and API
 *
 */
public class SampleExtensionService implements ExtensionService {

    private static final String LOREM_IPSUM = "Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.";

    private static final String[] COLOR_VALUES = new String[] { "80", "C8", "FF" };

    private EventPublisher eventPublisher;

    List<ExtensionType> types = new ArrayList<>(3);
    Map<String, Extension> extensions = new HashMap<>(30);

    protected void setEventPublisher(EventPublisher eventPublisher) {
        this.eventPublisher = eventPublisher;
    }

    protected void unsetEventPublisher(EventPublisher eventPublisher) {
        this.eventPublisher = null;
    }

    protected void activate() {
        types.add(new ExtensionType("binding", "Bindings"));
        types.add(new ExtensionType("ui", "User Interfaces"));
        types.add(new ExtensionType("persistence", "Persistence Services"));

        for (ExtensionType type : types) {
            for (int i = 0; i < 10; i++) {
                String id = type.getId() + Integer.toString(i);
                boolean installed = Math.random() > 0.5;
                String name = RandomStringUtils.randomAlphabetic(5);
                String label = name + " " + StringUtils.capitalize(type.getId());
                String typeId = type.getId();
                String version = "1.0";
                String link = (Math.random() < 0.5) ? null : "http://lmgtfy.com/?q=" + name;
                String description = createDescription();
                String imageLink = null;
                String backgroundColor = createRandomColor();
                Extension extension = new Extension(id, typeId, label, version, link, installed, description,
                        backgroundColor, imageLink);
                extensions.put(extension.getId(), extension);
            }
        }
    }

    private static final Random random = new Random();

    private String createRandomColor() {
        StringBuilder ret = new StringBuilder("#");
        for (int i = 0; i < 3; i++) {
            ret.append(COLOR_VALUES[random.nextInt(COLOR_VALUES.length)]);
        }
        return ret.toString();
    }

    private String createDescription() {
        int index = StringUtils.indexOf(LOREM_IPSUM, ' ', random.nextInt(LOREM_IPSUM.length()));
        return LOREM_IPSUM.substring(0, index);
    }

    protected void deactivate() {
        types.clear();
        extensions.clear();
    }

    @Override
    public void install(String id) {
        try {
            Thread.sleep((long) (Math.random() * 10000));
            Extension extension = getExtension(id, null);
            extension.setInstalled(true);
            postInstalledEvent(id);
        } catch (InterruptedException e) {
        }
    }

    @Override
    public void uninstall(String id) {
        try {
            Thread.sleep((long) (Math.random() * 5000));
            Extension extension = getExtension(id, null);
            extension.setInstalled(false);
            postUninstalledEvent(id);
        } catch (InterruptedException e) {
        }
    }

    @Override
    public List<Extension> getExtensions(Locale locale) {
        return new ArrayList<>(extensions.values());
    }

    @Override
    public Extension getExtension(String id, Locale locale) {
        return extensions.get(id);
    }

    @Override
    public List<ExtensionType> getTypes(Locale locale) {
        return types;
    }

    @Override
    public String getExtensionId(URI extensionURI) {
        return null;
    }

    private void postInstalledEvent(String extensionId) {
        if (eventPublisher != null) {
            Event event = ExtensionEventFactory.createExtensionInstalledEvent(extensionId);
            eventPublisher.post(event);
        }
    }

    private void postUninstalledEvent(String extensionId) {
        if (eventPublisher != null) {
            Event event = ExtensionEventFactory.createExtensionUninstalledEvent(extensionId);
            eventPublisher.post(event);
        }
    }

}