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186 lines
6.4 KiB
186 lines
6.4 KiB
/*
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This file is part of Airsonic.
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Airsonic is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Airsonic is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Airsonic. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2017 (C) Airsonic Authors
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Based upon Subsonic, Copyright 2009 (C) Sindre Mehus
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*/
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package org.airsonic.player.service.upnp;
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import org.airsonic.player.domain.MusicFolder;
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import org.airsonic.player.domain.ParamSearchResult;
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import org.airsonic.player.util.Util;
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import org.fourthline.cling.support.contentdirectory.DIDLParser;
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import org.fourthline.cling.support.model.BrowseResult;
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import org.fourthline.cling.support.model.DIDLContent;
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import org.fourthline.cling.support.model.SortCriterion;
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import org.fourthline.cling.support.model.container.Container;
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import org.fourthline.cling.support.model.container.StorageFolder;
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import org.springframework.beans.factory.annotation.Autowired;
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import java.lang.reflect.ParameterizedType;
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import java.util.List;
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/**
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* @author Allen Petersen
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* @version $Id$
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*/
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public abstract class UpnpContentProcessor<T extends Object, U extends Object> {
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@Autowired
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private DispatchingContentDirectory dispatchingContentDirectory;
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protected String rootTitle;
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protected String rootId;
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/**
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* Browses the root metadata for a type.
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*/
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public BrowseResult browseRootMetadata() throws Exception {
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DIDLContent didl = new DIDLContent();
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didl.addContainer(createRootContainer());
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return createBrowseResult(didl, 1, 1);
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}
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public Container createRootContainer() throws Exception {
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Container container = new StorageFolder();
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container.setId(getRootId());
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container.setTitle(getRootTitle());
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int childCount = getAllItemsSize();
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container.setChildCount(childCount);
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container.setParentID(DispatchingContentDirectory.CONTAINER_ID_ROOT);
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return container;
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}
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/**
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* Browses the top-level content of a type.
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*/
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public BrowseResult browseRoot(String filter, long firstResult, long maxResults, SortCriterion[] orderBy) throws Exception {
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DIDLContent didl = new DIDLContent();
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List<T> allItems = getAllItems();
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if (filter != null) {
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// filter items (not implemented yet)
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}
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if (orderBy != null) {
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// sort items (not implemented yet)
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}
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List<T> selectedItems = Util.subList(allItems, firstResult, maxResults);
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for (T item : selectedItems) {
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addItem(didl, item);
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}
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return createBrowseResult(didl, (int) didl.getCount(), allItems.size());
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}
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/**
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* Browses metadata for a child.
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*/
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public BrowseResult browseObjectMetadata(String id) throws Exception {
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T item = getItemById(id);
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DIDLContent didl = new DIDLContent();
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addItem(didl, item);
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return createBrowseResult(didl, 1, 1);
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}
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/**
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* Browses a child of the container.
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*/
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public BrowseResult browseObject(String id, String filter, long firstResult, long maxResults, SortCriterion[] orderBy) throws Exception {
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T item = getItemById(id);
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List<U> allChildren = getChildren(item);
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if (filter != null) {
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// filter items (not implemented yet)
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}
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if (orderBy != null) {
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// sort items (not implemented yet)
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}
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List<U> selectedChildren = Util.subList(allChildren, firstResult, maxResults);
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DIDLContent didl = new DIDLContent();
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for (U child : selectedChildren) {
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addChild(didl, child);
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}
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return createBrowseResult(didl, selectedChildren.size(), allChildren.size());
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}
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protected BrowseResult createBrowseResult(DIDLContent didl, int count, int totalMatches) throws Exception {
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return new BrowseResult(new DIDLParser().generate(didl), count, totalMatches);
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}
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public BrowseResult searchByName(String name,
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long firstResult, long maxResults,
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SortCriterion[] orderBy) {
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DIDLContent didl = new DIDLContent();
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Class clazz = (Class) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0];
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try {
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List<MusicFolder> allFolders = getDispatchingContentDirectory().getSettingsService().getAllMusicFolders();
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ParamSearchResult<T> result = getDispatcher().getSearchService().searchByName(name, (int) firstResult, (int) maxResults, allFolders, clazz);
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List<T> selectedItems = result.getItems();
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for (T item : selectedItems) {
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addItem(didl, item);
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}
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return createBrowseResult(didl, (int) didl.getCount(), result.getTotalHits());
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} catch (Exception e) {
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return null;
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}
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}
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public DispatchingContentDirectory getDispatchingContentDirectory() {
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return dispatchingContentDirectory;
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}
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public void setDispatchingContentDirectory(DispatchingContentDirectory dispatchingContentDirectory) {
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this.dispatchingContentDirectory = dispatchingContentDirectory;
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}
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public DispatchingContentDirectory getDispatcher() {
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return getDispatchingContentDirectory();
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}
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public void addItem(DIDLContent didl, T item) {
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didl.addContainer(createContainer(item));
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}
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// this can probably be optimized in some cases
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public int getAllItemsSize() throws Exception {
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return getAllItems().size();
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}
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public abstract Container createContainer(T item);
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public abstract List<T> getAllItems() throws Exception;
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public abstract T getItemById(String id);
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public abstract List<U> getChildren(T item) throws Exception;
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public abstract void addChild(DIDLContent didl, U child);
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public String getRootTitle() {
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return rootTitle;
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}
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public void setRootTitle(String rootTitle) {
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this.rootTitle = rootTitle;
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}
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public String getRootId() {
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return rootId;
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}
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public void setRootId(String rootId) {
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this.rootId = rootId;
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}
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}
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