/*
 * Copyright (C) 2005-2012 Alfresco Software Limited.
 *
 * This file is part of Alfresco
 *
 * Alfresco is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Alfresco is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
 */
package org.alfresco.rest.api;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.alfresco.repo.security.authentication.AuthenticationUtil;
import org.alfresco.rest.api.model.PersonNetwork;
import org.alfresco.rest.api.networks.NetworksEntityResource;
import org.alfresco.rest.framework.Api;
import org.alfresco.rest.framework.jacksonextensions.JacksonHelper;
import org.alfresco.rest.framework.jacksonextensions.JacksonHelper.Writer;
import org.alfresco.rest.framework.resource.parameters.CollectionWithPagingInfo;
import org.alfresco.rest.framework.resource.parameters.Paging;
import org.alfresco.rest.framework.resource.parameters.Params;
import org.alfresco.rest.framework.webscripts.ResourceWebScriptHelper;
import org.codehaus.jackson.JsonGenerationException;
import org.codehaus.jackson.JsonGenerator;
import org.codehaus.jackson.map.JsonMappingException;
import org.codehaus.jackson.map.ObjectMapper;
import org.springframework.extensions.webscripts.AbstractWebScript;
import org.springframework.extensions.webscripts.Format;
import org.springframework.extensions.webscripts.WebScriptRequest;
import org.springframework.extensions.webscripts.WebScriptResponse;

/**
 * A webscript that returns the authenticated user's network memberships.
 * 
 * @author steveglover
 *
 */
public class NetworksWebScriptGet extends AbstractWebScript
{
	private Networks networks;
	private JacksonHelper jsonHelper;
    private ResourceWebScriptHelper helper;
    
    public void setJsonHelper(JacksonHelper jsonHelper)
    {
        this.jsonHelper = jsonHelper;
    }
    
	public void setHelper(ResourceWebScriptHelper helper)
	{
		this.helper = helper;
	}

	public void setNetworks(Networks networks)
	{
		this.networks = networks;
	}

	@Override
	public void execute(WebScriptRequest req, WebScriptResponse res) throws IOException
	{
        final Paging paging = ResourceWebScriptHelper.findPaging(req);

        // apply content type
        res.setContentType(Format.JSON.mimetype() + ";charset=UTF-8");

        jsonHelper.withWriter(res.getOutputStream(), new Writer()
        {
            @Override
            public void writeContents(JsonGenerator generator, ObjectMapper objectMapper)
                        throws JsonGenerationException, JsonMappingException, IOException
            {
                List<Object> entities = new ArrayList<Object>();

                String personId = AuthenticationUtil.getFullyAuthenticatedUser();
                
            	CollectionWithPagingInfo<PersonNetwork> networkMemberships = networks.getNetworks(personId, paging);
                for (PersonNetwork networkMember : networkMemberships.getCollection())
                {
                	// TODO this is not ideal, but the only way to populate the embedded network entities (this would normally be
                	// done automatically by the api framework).
                	Object wrapped = helper.postProcessResponse(Api.ALFRESCO_PUBLIC, NetworksEntityResource.NAME, Params.valueOf(personId, null), networkMember);
                	entities.add(wrapped);
                }

                objectMapper.writeValue(generator, CollectionWithPagingInfo.asPaged(paging, entities));
            }
        });		
	}
}