OptionsServlet.java

/*
 * #%L
 * ACS AEM Commons Bundle
 * %%
 * Copyright (C) 2013 Adobe
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */
package com.adobe.acs.commons.designer.impl;

import java.io.IOException;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;

import javax.servlet.ServletException;

import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.sling.SlingServlet;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.servlets.SlingSafeMethodsServlet;
import org.apache.sling.commons.json.JSONException;
import org.apache.sling.commons.json.io.JSONWriter;

import com.adobe.granite.ui.clientlibs.ClientLibrary;
import com.adobe.granite.ui.clientlibs.HtmlLibraryManager;
import com.adobe.granite.ui.clientlibs.LibraryType;

/**
 * Servlet which produces Options JSON for ClientLibsManager dialog
 *
 */
@SuppressWarnings("serial")
@SlingServlet(paths = "/apps/acs-commons/components/utilities/designer/clientlibsmanager/options",
        extensions = "json")
public class OptionsServlet extends SlingSafeMethodsServlet {

    @Reference
    private HtmlLibraryManager libraryManager;

    @Override
    protected void doGet(SlingHttpServletRequest request, SlingHttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("application/json");
        final JSONWriter writer = new JSONWriter(response.getWriter());
        try {
            writer.array();
            String type = request.getRequestPathInfo().getSelectorString();
            if (type != null) {
                try {
                    Set<String> categories = new TreeSet<String>();
                    LibraryType libraryType = LibraryType.valueOf(type.toUpperCase());
                    Map<String, ClientLibrary> libraries = libraryManager.getLibraries();
                    for (ClientLibrary library : libraries.values()) {
                        if (library.getTypes() != null && library.getTypes().contains(libraryType)) {
                            String[] libraryCats = library.getCategories();
                            if (libraryCats != null) {
                                for (String cat : libraryCats) {
                                    categories.add(cat);
                                }
                            }
                        }
                    }

                    for (String cat : categories) {
                        writer.object();
                        writer.key("value");
                        writer.value(cat);
                        writer.key("text");
                        writer.value(cat);
                        writer.endObject();
                    }

                } catch (IllegalArgumentException e) {
                    // no matching type. no need to log, just return empty array.
                }
            }
            writer.endArray();
        } catch (JSONException e) {
            response.reset();
            throw new ServletException("Unable to produce JSON", e);
        }
    }
}