/**

 * Copyright (c) 2000-2011 Liferay, Inc. All rights reserved.

 *

 * This library 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 2.1 of the License, or (at your option)

 * any later version.

 *

 * This library 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.

 */



package com.liferay.opensocial.shindig.service;



import com.liferay.opensocial.shindig.util.ShindigUtil;

import com.liferay.portal.kernel.log.Log;

import com.liferay.portal.kernel.log.LogFactoryUtil;

import com.liferay.portal.kernel.util.GetterUtil;

import com.liferay.portal.kernel.util.StringPool;

import com.liferay.portal.kernel.util.Validator;

import com.liferay.portal.model.User;

import com.liferay.portal.service.UserLocalServiceUtil;

import com.liferay.portlet.expando.NoSuchTableException;

import com.liferay.portlet.expando.model.ExpandoColumn;

import com.liferay.portlet.expando.model.ExpandoColumnConstants;

import com.liferay.portlet.expando.model.ExpandoTable;

import com.liferay.portlet.expando.model.ExpandoValue;

import com.liferay.portlet.expando.service.ExpandoColumnLocalServiceUtil;

import com.liferay.portlet.expando.service.ExpandoTableLocalServiceUtil;

import com.liferay.portlet.expando.service.ExpandoValueLocalServiceUtil;



import java.util.HashMap;

import java.util.LinkedHashSet;

import java.util.List;

import java.util.Map;

import java.util.Set;

import java.util.concurrent.Future;



import javax.servlet.http.HttpServletResponse;



import org.apache.shindig.auth.SecurityToken;

import org.apache.shindig.common.util.ImmediateFuture;

import org.apache.shindig.protocol.DataCollection;

import org.apache.shindig.protocol.ProtocolException;

import org.apache.shindig.social.opensocial.spi.AppDataService;

import org.apache.shindig.social.opensocial.spi.GroupId;

import org.apache.shindig.social.opensocial.spi.UserId;



/**

 * @author Michael Young

 */

public class LiferayAppDataService implements AppDataService {



	public Future<Void> deletePersonData(

			UserId userId, GroupId groupId, String appId, Set<String> fields,

			SecurityToken securityToken)

		throws ProtocolException {



		try {

			doDeletePersonData(userId, groupId, appId, fields, securityToken);



			return ImmediateFuture.newInstance(null);

		}

		catch (Exception e) {

			if (_log.isDebugEnabled()) {

				_log.debug(e, e);

			}



			throw new ProtocolException(

				HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.getMessage(),

				e);

		}

	}



	public Future<DataCollection> getPersonData(

			Set<UserId> userIds, GroupId groupId, String appId,

			Set<String> fields, SecurityToken securityToken)

		throws ProtocolException {



		try {

			DataCollection dataCollection = doGetPersonData(

				userIds, groupId, appId, fields, securityToken);



			return ImmediateFuture.newInstance(dataCollection);

		}

		catch (Exception e) {

			if (_log.isDebugEnabled()) {

				_log.debug(e, e);

			}



			throw new ProtocolException(

				HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.getMessage(),

				e);

		}

	}



	public Future<Void> updatePersonData(

			UserId userId, GroupId groupId, String appId, Set<String> fields,

			Map<String, String> values, SecurityToken securityToken)

		throws ProtocolException {



		try {

			doUpdatePersonData(

				userId, groupId, appId, fields, values, securityToken);



			return ImmediateFuture.newInstance(null);

		}

		catch (Exception e) {

			if (_log.isDebugEnabled()) {

				_log.debug(e, e);

			}



			throw new ProtocolException(

				HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.getMessage(),

				e);

		}

	}



	protected void doDeletePersonData(

			UserId userId, GroupId groupId, String appId, Set<String> fields,

			SecurityToken securityToken)

		throws Exception {



		long companyId = getCompanyId(securityToken);



		long userIdLong = GetterUtil.getLong(userId.getUserId(securityToken));



		for (String field : fields) {

			ExpandoColumn expandoColumn = getExpandoColumn(

				companyId, getColumnName(appId, field));



			ExpandoValueLocalServiceUtil.deleteValue(

				companyId, User.class.getName(),

				ShindigUtil.getTableOpenSocial(), expandoColumn.getName(),

				userIdLong);

		}



		return;

	}



	protected DataCollection doGetPersonData(

			Set<UserId> userIds, GroupId groupId, String appId,

			Set<String> fields, SecurityToken securityToken)

		throws Exception {



		long companyId = getCompanyId(securityToken);



		Map<String, Map<String, String>> peopleAppData =

			new HashMap<String, Map<String, String>>();



		List<ExpandoColumn> expandoColumns = getExpandoColumns(

			companyId, appId);



		if (expandoColumns == null) {

			return null;

		}



		if (fields.isEmpty()) {

			fields = new LinkedHashSet<String>();



			for (ExpandoColumn expandoColumn : expandoColumns) {

				fields.add(expandoColumn.getName());

			}

		}



		for (UserId userId : userIds) {

			String userIdString = userId.getUserId(securityToken);



			long userIdLong = GetterUtil.getLong(userIdString);



			Map<String, String> personAppData = new HashMap<String, String>();



			for (String field : fields) {

				String value = getExpandoValue(

					companyId, appId, userIdLong, getColumnName(appId, field));



				personAppData.put(field, value);

			}



			peopleAppData.put(userIdString, personAppData);

		}



		return new DataCollection(peopleAppData);

	}



	protected void doUpdatePersonData(UserId userId, GroupId groupId,

			String appId, Set<String> fields, Map<String, String> values,

			SecurityToken securityToken)

		throws Exception {



		long companyId = getCompanyId(securityToken);



		long userIdLong = GetterUtil.getLong(userId.getUserId(securityToken));



		for (String key : values.keySet()) {



			// Workaround for a Shindig bug that stores a Long in value instead

			// of the expected String so we cannot use generics here



			String value = String.valueOf(values.get(key));



			ExpandoColumn expandoColumn =

				getExpandoColumn(companyId, getColumnName(appId, key));



			ExpandoValueLocalServiceUtil.addValue(

				companyId, User.class.getName(),

				ShindigUtil.getTableOpenSocial(), expandoColumn.getName(),

				userIdLong, value);

		}



		return;

	}



	protected String getColumnName(String appId, String field) {

		if (Validator.isNotNull(appId)) {

			return appId.concat(field);

		}

		else {

			return field;

		}

	}



	protected long getCompanyId(SecurityToken securityToken) throws Exception {

		long userIdLong = GetterUtil.getLong(securityToken.getViewerId());



		User user = UserLocalServiceUtil.getUser(userIdLong);



		return user.getCompanyId();

	}



	protected ExpandoColumn getExpandoColumn(

			long companyId, String columnName)

		throws Exception {



		ExpandoTable expandoTable = null;



		try {

			expandoTable = ExpandoTableLocalServiceUtil.getTable(

				companyId, User.class.getName(),

				ShindigUtil.getTableOpenSocial());

		}

		catch (NoSuchTableException nste) {

			_log.error(nste, nste);

		}



		ExpandoColumn expandoColumn = ExpandoColumnLocalServiceUtil.getColumn(

			expandoTable.getTableId(), columnName);



		if (expandoColumn == null) {

			expandoColumn = ExpandoColumnLocalServiceUtil.addColumn(

				expandoTable.getTableId(), columnName,

				ExpandoColumnConstants.STRING);

		}



		return expandoColumn;

	}



	protected List<ExpandoColumn> getExpandoColumns(

		long companyId, String appId) {



		try {

			List<ExpandoColumn> expandoColumns =

				ExpandoColumnLocalServiceUtil.getColumns(

					companyId, User.class.getName(),

					ShindigUtil.getTableOpenSocial());



			return expandoColumns;

		}

		catch (Exception e) {

			return null;

		}

	}



	protected String getExpandoValue(

		long companyId, String appId, long userId, String columnName) {



		try {

			getExpandoColumn(companyId, columnName);



			ExpandoValue expandoValue = ExpandoValueLocalServiceUtil.getValue(

				companyId, User.class.getName(),

				ShindigUtil.getTableOpenSocial(), columnName, userId);



			return expandoValue.getData();

		}

		catch (Exception e) {

			return StringPool.BLANK;

		}

	}



	private static Log _log = LogFactoryUtil.getLog(

		LiferayAppDataService.class);



}