[addonservices] allow uninstalling of removed addons

Signed-off-by: Jan N. Klug <jan.n.klug@rub.de>

bundles/org.openhab.core.addon.marketplace/pom.xml

@@ -38,6 +38,12 @@
       <version>${project.version}</version>
       <scope>compile</scope>
     </dependency>
+    <dependency>
+      <groupId>org.openhab.core.bundles</groupId>
+      <artifactId>org.openhab.core.test</artifactId>
+      <version>${project.version}</version>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 
 </project>

bundles/org.openhab.core.addon.marketplace/src/main/java/org/openhab/core/addon/marketplace/AbstractRemoteAddonService.java

@@ -0,0 +1,205 @@
+/**
+ * Copyright (c) 2010-2022 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.core.addon.marketplace;
+
+import java.io.IOException;
+import java.net.URI;
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.Dictionary;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.openhab.core.addon.Addon;
+import org.openhab.core.addon.AddonEventFactory;
+import org.openhab.core.addon.AddonService;
+import org.openhab.core.addon.AddonType;
+import org.openhab.core.cache.ExpiringCache;
+import org.openhab.core.events.Event;
+import org.openhab.core.events.EventPublisher;
+import org.openhab.core.storage.Storage;
+import org.openhab.core.storage.StorageService;
+import org.osgi.service.cm.Configuration;
+import org.osgi.service.cm.ConfigurationAdmin;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+/**
+ * The {@link AbstractRemoteAddonService} implements basic functionality of a remote add-on-service
+ *
+ * @author Jan N. Klug - Initial contribution
+ */
+@NonNullByDefault
+public abstract class AbstractRemoteAddonService implements AddonService {
+    protected static final Map<String, AddonType> TAG_ADDON_TYPE_MAP = Map.of( //
+            "automation", new AddonType("automation", "Automation"), //
+            "binding", new AddonType("binding", "Bindings"), //
+            "misc", new AddonType("misc", "Misc"), //
+            "persistence", new AddonType("persistence", "Persistence"), //
+            "transformation", new AddonType("transformation", "Transformations"), //
+            "ui", new AddonType("ui", "User Interfaces"), //
+            "voice", new AddonType("voice", "Voice"));
+
+    protected final Gson gson = new GsonBuilder().setDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'").create();
+    protected final Set<MarketplaceAddonHandler> addonHandlers = new HashSet<>();
+    protected final Storage<String> installedAddonStorage;
+    protected final EventPublisher eventPublisher;
+    protected final ConfigurationAdmin configurationAdmin;
+    protected final ExpiringCache<List<Addon>> cachedRemoteAddons = new ExpiringCache<>(Duration.ofMinutes(15),
+            this::getRemoteAddons);
+    protected List<Addon> cachedAddons = List.of();
+    protected List<String> installedAddons = List.of();
+
+    public AbstractRemoteAddonService(EventPublisher eventPublisher, ConfigurationAdmin configurationAdmin,
+            StorageService storageService, String servicePid) {
+        this.eventPublisher = eventPublisher;
+        this.configurationAdmin = configurationAdmin;
+        this.installedAddonStorage = storageService.getStorage(servicePid);
+    }
+
+    @Override
+    public void refreshSource() {
+        List<Addon> addons = new ArrayList<>();
+        installedAddonStorage.stream().map(e -> Objects.requireNonNull(gson.fromJson(e.getValue(), Addon.class)))
+                .forEach(addons::add);
+        addons.forEach(a -> a.setInstalled(true));
+
+        // create lookup list to make sure installed addons take precedence
+        List<String> installedAddons = addons.stream().map(Addon::getId).collect(Collectors.toList());
+
+        if (remoteEnabled()) {
+            List<Addon> remoteAddons = Objects.requireNonNullElse(cachedRemoteAddons.getValue(), List.of());
+            remoteAddons.stream().filter(a -> !installedAddons.contains(a.getId())).forEach(addons::add);
+        }
+
+        cachedAddons = addons;
+        this.installedAddons = installedAddons;
+    }
+
+    /**
+     * get all addons from remote
+     *
+     * @return a list of {@link Addon} that are available on the remote side
+     */
+    protected abstract List<Addon> getRemoteAddons();
+
+    @Override
+    public List<Addon> getAddons(@Nullable Locale locale) {
+        refreshSource();
+        return cachedAddons;
+    }
+
+    @Override
+    public abstract @Nullable Addon getAddon(String id, @Nullable Locale locale);
+
+    @Override
+    public List<AddonType> getTypes(@Nullable Locale locale) {
+        return new ArrayList<>(TAG_ADDON_TYPE_MAP.values());
+    }
+
+    @Override
+    public void install(String id) {
+        Addon addon = getAddon(id, null);
+        if (addon != null) {
+            for (MarketplaceAddonHandler handler : addonHandlers) {
+                if (handler.supports(addon.getType(), addon.getContentType())) {
+                    if (!handler.isInstalled(addon.getId())) {
+                        try {
+                            handler.install(addon);
+                            installedAddonStorage.put(id, gson.toJson(addon));
+                            cachedRemoteAddons.invalidateValue();
+                            postInstalledEvent(addon.getId());
+                        } catch (MarketplaceHandlerException e) {
+                            postFailureEvent(addon.getId(), e.getMessage());
+                        }
+                    } else {
+                        postFailureEvent(addon.getId(), "Add-on is already installed.");
+                    }
+                    return;
+                }
+            }
+        }
+        postFailureEvent(id, "Add-on not known.");
+    }
+
+    @Override
+    public void uninstall(String id) {
+        Addon addon = getAddon(id, null);
+        if (addon != null) {
+            for (MarketplaceAddonHandler handler : addonHandlers) {
+                if (handler.supports(addon.getType(), addon.getContentType())) {
+                    if (handler.isInstalled(addon.getId())) {
+                        try {
+                            handler.uninstall(addon);
+                            installedAddonStorage.remove(id);
+                            cachedRemoteAddons.invalidateValue();
+                            postUninstalledEvent(addon.getId());
+                        } catch (MarketplaceHandlerException e) {
+                            postFailureEvent(addon.getId(), e.getMessage());
+                        }
+                    } else {
+                        installedAddonStorage.remove(id);
+                        postFailureEvent(addon.getId(), "Add-on is not installed.");
+                    }
+                    return;
+                }
+            }
+        }
+        postFailureEvent(id, "Add-on not known.");
+    }
+
+    @Override
+    public abstract @Nullable String getAddonId(URI addonURI);
+
+    /**
+     * check if remote services are enabled
+     *
+     * @return true if network access is allowed
+     */
+    protected boolean remoteEnabled() {
+        try {
+            Configuration configuration = configurationAdmin.getConfiguration("org.openhab.addons", null);
+            Dictionary<String, Object> properties = configuration.getProperties();
+            if (properties == null) {
+                // if we can't determine a set property, we use true (default is remote enabled)
+                return true;
+            }
+            return (boolean) Objects.requireNonNullElse(properties.get("remote"), true);
+        } catch (IOException e) {
+            return true;
+        }
+    }
+
+    private void postInstalledEvent(String extensionId) {
+        Event event = AddonEventFactory.createAddonInstalledEvent(extensionId);
+        eventPublisher.post(event);
+    }
+
+    private void postUninstalledEvent(String extensionId) {
+        Event event = AddonEventFactory.createAddonUninstalledEvent(extensionId);
+        eventPublisher.post(event);
+    }
+
+    private void postFailureEvent(String extensionId, @Nullable String msg) {
+        Event event = AddonEventFactory.createAddonFailureEvent(extensionId, msg);
+        eventPublisher.post(event);
+    }
+}