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package org.glassfish.jersey.examples.oauth2.googleclient.resource;
import java.util.ArrayList;
import java.util.List;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.client.Client;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriBuilder;
import javax.ws.rs.core.UriInfo;
import org.glassfish.jersey.client.oauth2.OAuth2ClientSupport;
import org.glassfish.jersey.client.oauth2.OAuth2CodeGrantFlow;
import org.glassfish.jersey.client.oauth2.OAuth2FlowGoogleBuilder;
import org.glassfish.jersey.examples.oauth2.googleclient.SimpleOAuthService;
import org.glassfish.jersey.examples.oauth2.googleclient.entity.TaskBean;
import org.glassfish.jersey.examples.oauth2.googleclient.entity.TaskListBean;
import org.glassfish.jersey.examples.oauth2.googleclient.entity.TaskRootBean;
import org.glassfish.jersey.examples.oauth2.googleclient.model.AllTaskListsModel;
import org.glassfish.jersey.examples.oauth2.googleclient.model.TaskListModel;
import org.glassfish.jersey.examples.oauth2.googleclient.model.TaskModel;
import org.glassfish.jersey.jackson.JacksonFeature;
import org.glassfish.jersey.server.mvc.Template;
/**
* Task resource that returns Google tasks that was queried using a {@link Client}.
*
* @author Miroslav Fuksa (miroslav.fuksa at oracle.com)
*/
@Path("tasks")
public class TaskResource {
private static final String GOOGLE_TASKS_BASE_URI = "https://www.googleapis.com/tasks/v1/";
@Context
private UriInfo uriInfo;
@GET
@Template(name = "/tasks.mustache")
@Produces("text/html")
public Response getTasks() {
if (SimpleOAuthService.getAccessToken() == null) {
final String redirectURI = UriBuilder.fromUri(uriInfo.getBaseUri())
.path("oauth2/authorize").build().toString();
final OAuth2CodeGrantFlow flow = OAuth2ClientSupport.googleFlowBuilder(
SimpleOAuthService.getClientIdentifier(),
redirectURI,
"https://www.googleapis.com/auth/tasks.readonly")
.prompt(OAuth2FlowGoogleBuilder.Prompt.CONSENT).build();
SimpleOAuthService.setFlow(flow);
// start the flow
final String googleAuthURI = flow.start();
// redirect user to Google Authorization URI.
return Response.seeOther(UriBuilder.fromUri(googleAuthURI).build()).build();
}
// We have already an access token. Query the data from Google API.
final Client client = SimpleOAuthService.getFlow().getAuthorizedClient();
final AllTaskListsModel allTaskListsModel = getTasks(client);
return Response.ok(allTaskListsModel).type(MediaType.TEXT_HTML_TYPE).build();
}
/**
* Queries task data from google.
* @param client Client configured for authentication with access token.
* @return String html Google task data.
*/
private static AllTaskListsModel getTasks(final Client client) {
client.register(JacksonFeature.class);
final WebTarget baseTarget = client.target(GOOGLE_TASKS_BASE_URI);
final Response response = baseTarget.path("users/@me/lists").request().get();
final TaskRootBean taskRootBean = response.readEntity(TaskRootBean.class);
final List<TaskListModel> listOfTaskLists = new ArrayList<TaskListModel>();
for (final TaskListBean taskListBean : taskRootBean.getItems()) {
final List<TaskModel> taskList = new ArrayList<TaskModel>();
final WebTarget listTarget = baseTarget.path("lists/{tasklist}/tasks")
.resolveTemplate("tasklist", taskListBean.getId());
final TaskListBean fullTaskListBean = listTarget.request().get(TaskListBean.class);
for (final TaskBean taskBean : fullTaskListBean.getTasks()) {
taskList.add(new TaskModel(taskBean.getTitle()));
}
final TaskListModel listModel = new TaskListModel(taskListBean == null ? "No tasks were found. Define some tasks."
: taskListBean.getTitle(), taskList);
listOfTaskLists.add(listModel);
}
return new AllTaskListsModel(listOfTaskLists);
}
}