PrivilegeUsersService.java

/*
 * Copyright 2015 Robert von Burg <eitch@eitchnet.ch>
 * 
 * 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.
 */
package li.strolch.rest.endpoint;

import java.text.MessageFormat;
import java.util.List;
import java.util.Locale;

import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.GenericEntity;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;

import li.strolch.agent.api.ComponentContainer;
import li.strolch.privilege.base.AccessDeniedException;
import li.strolch.privilege.base.PrivilegeException;
import li.strolch.privilege.handler.PrivilegeHandler;
import li.strolch.privilege.model.Certificate;
import li.strolch.privilege.model.UserRep;
import li.strolch.privilege.model.UserState;
import li.strolch.rest.RestfulStrolchComponent;
import li.strolch.rest.StrolchRestfulConstants;
import li.strolch.rest.StrolchSessionHandler;
import li.strolch.rest.model.PasswordField;
import li.strolch.rest.model.Result;
import li.strolch.service.api.ServiceHandler;
import li.strolch.service.api.ServiceResult;
import li.strolch.service.privilege.users.PrivilegeAddRoleToUserService;
import li.strolch.service.privilege.users.PrivilegeAddUserService;
import li.strolch.service.privilege.users.PrivilegeRemoveRoleFromUserService;
import li.strolch.service.privilege.users.PrivilegeRemoveUserService;
import li.strolch.service.privilege.users.PrivilegeRoleUserNamesArgument;
import li.strolch.service.privilege.users.PrivilegeSetUserLocaleArgument;
import li.strolch.service.privilege.users.PrivilegeSetUserLocaleService;
import li.strolch.service.privilege.users.PrivilegeSetUserPasswordArgument;
import li.strolch.service.privilege.users.PrivilegeSetUserPasswordService;
import li.strolch.service.privilege.users.PrivilegeSetUserStateArgument;
import li.strolch.service.privilege.users.PrivilegeSetUserStateService;
import li.strolch.service.privilege.users.PrivilegeUpdateUserService;
import li.strolch.service.privilege.users.PrivilegeUserArgument;
import li.strolch.service.privilege.users.PrivilegeUserNameArgument;
import li.strolch.service.privilege.users.PrivilegeUserResult;

/**
 * @author Robert von Burg <eitch@eitchnet.ch>
 */
@Path("strolch/privilege/users")
public class PrivilegeUsersService {

	private PrivilegeHandler getPrivilegeHandler(Certificate cert) {
		ComponentContainer container = RestfulStrolchComponent.getInstance().getContainer();
		return container.getPrivilegeHandler().getPrivilegeHandler(cert);
	}

	@GET
	@Produces(MediaType.APPLICATION_JSON)
	public Response getUsers(@Context HttpServletRequest request) {
		Certificate cert = (Certificate) request.getAttribute(StrolchRestfulConstants.STROLCH_CERTIFICATE);
		PrivilegeHandler privilegeHandler = getPrivilegeHandler(cert);

		List<UserRep> users = privilegeHandler.getUsers(cert);
		GenericEntity<List<UserRep>> entity = new GenericEntity<List<UserRep>>(users) {
		};
		return Response.ok(entity, MediaType.APPLICATION_JSON).build();
	}

	@GET
	@Produces(MediaType.APPLICATION_JSON)
	@Path("{username}")
	public Response getUser(@PathParam("username") String username, @Context HttpServletRequest request) {
		Certificate cert = (Certificate) request.getAttribute(StrolchRestfulConstants.STROLCH_CERTIFICATE);
		PrivilegeHandler privilegeHandler = getPrivilegeHandler(cert);

		UserRep user = privilegeHandler.getUser(cert, username);
		return Response.ok(user, MediaType.APPLICATION_JSON).build();
	}

	@POST
	@Consumes(MediaType.APPLICATION_JSON)
	@Produces(MediaType.APPLICATION_JSON)
	@Path("query")
	public Response queryUsers(UserRep query, @Context HttpServletRequest request) {
		Certificate cert = (Certificate) request.getAttribute(StrolchRestfulConstants.STROLCH_CERTIFICATE);
		PrivilegeHandler privilegeHandler = getPrivilegeHandler(cert);

		List<UserRep> users = privilegeHandler.queryUsers(cert, query);
		GenericEntity<List<UserRep>> entity = new GenericEntity<List<UserRep>>(users) {
		};
		return Response.ok(entity, MediaType.APPLICATION_JSON).build();
	}

	@POST
	@Consumes(MediaType.APPLICATION_JSON)
	@Produces(MediaType.APPLICATION_JSON)
	public Response addUser(UserRep newUser, @Context HttpServletRequest request) {
		Certificate cert = (Certificate) request.getAttribute(StrolchRestfulConstants.STROLCH_CERTIFICATE);

		ServiceHandler svcHandler = RestfulStrolchComponent.getInstance().getComponent(ServiceHandler.class);
		PrivilegeAddUserService svc = new PrivilegeAddUserService();
		PrivilegeUserArgument arg = new PrivilegeUserArgument();
		arg.user = newUser;

		PrivilegeUserResult svcResult = svcHandler.doService(cert, svc, arg);
		return handleServiceResult(svcResult);
	}

	@DELETE
	@Consumes(MediaType.APPLICATION_JSON)
	@Produces(MediaType.APPLICATION_JSON)
	@Path("{username}")
	public Response removeUser(@PathParam("username") String username, @Context HttpServletRequest request) {
		Certificate cert = (Certificate) request.getAttribute(StrolchRestfulConstants.STROLCH_CERTIFICATE);

		ServiceHandler svcHandler = RestfulStrolchComponent.getInstance().getComponent(ServiceHandler.class);
		PrivilegeRemoveUserService svc = new PrivilegeRemoveUserService();
		PrivilegeUserNameArgument arg = new PrivilegeUserNameArgument();
		arg.username = username;

		PrivilegeUserResult svcResult = svcHandler.doService(cert, svc, arg);
		return handleServiceResult(svcResult);
	}

	@PUT
	@Consumes(MediaType.APPLICATION_JSON)
	@Produces(MediaType.APPLICATION_JSON)
	@Path("{username}")
	public Response updateUser(@PathParam("username") String username, UserRep updatedFields,
			@Context HttpServletRequest request) {
		Certificate cert = (Certificate) request.getAttribute(StrolchRestfulConstants.STROLCH_CERTIFICATE);

		ServiceHandler svcHandler = RestfulStrolchComponent.getInstance().getComponent(ServiceHandler.class);
		PrivilegeUpdateUserService svc = new PrivilegeUpdateUserService();
		PrivilegeUserArgument arg = new PrivilegeUserArgument();
		arg.user = updatedFields;

		PrivilegeUserResult svcResult = svcHandler.doService(cert, svc, arg);
		return handleServiceResult(svcResult);
	}

	@PUT
	@Consumes(MediaType.APPLICATION_JSON)
	@Produces(MediaType.APPLICATION_JSON)
	@Path("{username}/roles/{rolename}")
	public Response addRoleToUser(@PathParam("username") String username, @PathParam("rolename") String rolename,
			@Context HttpServletRequest request) {
		Certificate cert = (Certificate) request.getAttribute(StrolchRestfulConstants.STROLCH_CERTIFICATE);

		ServiceHandler svcHandler = RestfulStrolchComponent.getInstance().getComponent(ServiceHandler.class);
		PrivilegeAddRoleToUserService svc = new PrivilegeAddRoleToUserService();
		PrivilegeRoleUserNamesArgument arg = new PrivilegeRoleUserNamesArgument();
		arg.username = username;
		arg.rolename = rolename;

		PrivilegeUserResult svcResult = svcHandler.doService(cert, svc, arg);
		return handleServiceResult(svcResult);
	}

	@DELETE
	@Consumes(MediaType.APPLICATION_JSON)
	@Produces(MediaType.APPLICATION_JSON)
	@Path("{username}/roles/{rolename}")
	public Response removeRoleFromUser(@PathParam("username") String username, @PathParam("rolename") String rolename,
			@Context HttpServletRequest request) {
		Certificate cert = (Certificate) request.getAttribute(StrolchRestfulConstants.STROLCH_CERTIFICATE);

		ServiceHandler svcHandler = RestfulStrolchComponent.getInstance().getComponent(ServiceHandler.class);
		PrivilegeRemoveRoleFromUserService svc = new PrivilegeRemoveRoleFromUserService();
		PrivilegeRoleUserNamesArgument arg = new PrivilegeRoleUserNamesArgument();
		arg.username = username;
		arg.rolename = rolename;

		PrivilegeUserResult svcResult = svcHandler.doService(cert, svc, arg);
		return handleServiceResult(svcResult);
	}

	@PUT
	@Produces(MediaType.APPLICATION_JSON)
	@Path("{username}/state/{state}")
	public Response setUserState(@PathParam("username") String username, @PathParam("state") String state,
			@Context HttpServletRequest request) {
		Certificate cert = (Certificate) request.getAttribute(StrolchRestfulConstants.STROLCH_CERTIFICATE);

		UserState userState;
		try {
			userState = UserState.valueOf(state);
		} catch (Exception e) {
			String msg = MessageFormat.format("UserState {0} is not valid!", state);
			return Response.serverError().entity(new Result(msg)).type(MediaType.APPLICATION_JSON).build();
		}

		ServiceHandler svcHandler = RestfulStrolchComponent.getInstance().getComponent(ServiceHandler.class);
		PrivilegeSetUserStateService svc = new PrivilegeSetUserStateService();
		PrivilegeSetUserStateArgument arg = new PrivilegeSetUserStateArgument();
		arg.username = username;
		arg.userState = userState;

		PrivilegeUserResult svcResult = svcHandler.doService(cert, svc, arg);
		return handleServiceResult(svcResult);
	}

	private Response handleServiceResult(PrivilegeUserResult svcResult) {
		if (svcResult.isOk()) {
			return Response.ok(svcResult.getUser(), MediaType.APPLICATION_JSON).build();
		} else if (svcResult.getThrowable() != null) {
			Throwable t = svcResult.getThrowable();
			if (t instanceof AccessDeniedException) {
				return Response.status(Status.FORBIDDEN).entity(new Result(t.getMessage()))
						.type(MediaType.APPLICATION_JSON).build();
			} else if (t instanceof PrivilegeException) {
				return Response.status(Status.UNAUTHORIZED).entity(new Result(t.getMessage())).build();
			}
		}

		return Response.status(Status.INTERNAL_SERVER_ERROR).entity(new Result(svcResult.getMessage())).build();
	}

	@PUT
	@Produces(MediaType.APPLICATION_JSON)
	@Path("{username}/locale/{locale}")
	public Response setUserLocale(@PathParam("username") String username, @PathParam("locale") String localeS,
			@Context HttpServletRequest request) {
		Certificate cert = (Certificate) request.getAttribute(StrolchRestfulConstants.STROLCH_CERTIFICATE);

		Locale locale;
		try {
			locale = new Locale(localeS);
		} catch (Exception e) {
			String msg = MessageFormat.format("Locale {0} is not valid!", localeS);
			return Response.serverError().entity(new Result(msg)).type(MediaType.APPLICATION_JSON).build();
		}

		ServiceHandler svcHandler = RestfulStrolchComponent.getInstance().getComponent(ServiceHandler.class);
		PrivilegeSetUserLocaleService svc = new PrivilegeSetUserLocaleService();
		PrivilegeSetUserLocaleArgument arg = new PrivilegeSetUserLocaleArgument();
		arg.username = username;
		arg.locale = locale;

		PrivilegeUserResult svcResult = svcHandler.doService(cert, svc, arg);
		return handleServiceResult(svcResult);
	}

	@PUT
	@Produces(MediaType.APPLICATION_JSON)
	@Path("{username}/password")
	public Response setUserPassword(@PathParam("username") String username, PasswordField passwordField,
			@Context HttpServletRequest request) {
		Certificate cert = (Certificate) request.getAttribute(StrolchRestfulConstants.STROLCH_CERTIFICATE);

		ServiceHandler svcHandler = RestfulStrolchComponent.getInstance().getComponent(ServiceHandler.class);
		PrivilegeSetUserPasswordService svc = new PrivilegeSetUserPasswordService();
		PrivilegeSetUserPasswordArgument arg = new PrivilegeSetUserPasswordArgument();
		arg.username = username;
		arg.password = passwordField.getPassword();

		ServiceResult svcResult = svcHandler.doService(cert, svc, arg);
		if (svcResult.isOk()) {

			// if user changes their own password, then invalidate the session
			if (cert.getUsername().equals(username)) {
				StrolchSessionHandler sessionHandler = RestfulStrolchComponent.getInstance().getSessionHandler();
				sessionHandler.invalidate(cert);
			}

			// TODO invalidate any other sessions for this user

			return Response.ok(new Result(), MediaType.APPLICATION_JSON).build();
		} else if (svcResult.getThrowable() != null) {
			Throwable t = svcResult.getThrowable();
			if (t instanceof AccessDeniedException) {
				return Response.status(Status.UNAUTHORIZED).entity(new Result(t.getMessage()))
						.type(MediaType.APPLICATION_JSON).build();
			} else if (t instanceof PrivilegeException) {
				return Response.status(Status.FORBIDDEN).entity(new Result(t.getMessage())).build();
			}
		}

		return Response.status(Status.INTERNAL_SERVER_ERROR).entity(new Result(svcResult.getMessage())).build();
	}
}