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// Portions Copyright [2016-2021] [Payara Foundation and/or affiliates]

package org.glassfish.admin.rest.resources;

import java.util.HashMap;
import jakarta.inject.Inject;
import javax.security.auth.Subject;
import jakarta.ws.rs.Consumes;
import jakarta.ws.rs.POST;
import jakarta.ws.rs.Path;
import jakarta.ws.rs.PathParam;
import jakarta.ws.rs.Produces;
import jakarta.ws.rs.core.Context;
import jakarta.ws.rs.core.MediaType;
import jakarta.ws.rs.core.Response;
import static jakarta.ws.rs.core.Response.Status.FORBIDDEN;
import static jakarta.ws.rs.core.Response.Status.OK;
import static jakarta.ws.rs.core.Response.Status.UNAUTHORIZED;

import org.glassfish.admin.rest.results.ActionReportResult;
import org.glassfish.admin.rest.utils.ResourceUtil;
import org.glassfish.admin.rest.utils.xml.RestActionReporter;
import org.glassfish.admin.restconnector.RestConfig;
import org.glassfish.common.util.admin.RestSessionManager;
import org.glassfish.grizzly.http.server.Request;
import org.glassfish.internal.api.RemoteAdminAccessException;
import org.glassfish.jersey.internal.util.collection.Ref;

/**
 * Represents sessions with GlassFish Rest service
 * @author Mitesh Meswani
 */
@Path("/sessions")
public class SessionsResource extends AbstractResource {
    @Context
    RestSessionManager sessionManager;

    @Inject
    private Ref request;

    /**
     * Get a new session with GlassFish Rest service
     * If a request lands here when authentication has been turned on => it has been authenticated.
     * @return a new session with GlassFish Rest service
     */
    @POST
    @Consumes({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML, MediaType.APPLICATION_FORM_URLENCODED})
    @Produces({MediaType.TEXT_HTML, MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
    public Response create(HashMap data) {
        if (data == null) {
            data = new HashMap();
        }
        final RestConfig restConfig = ResourceUtil.getRestConfig(locatorBridge.getRemoteLocator());

        Response.ResponseBuilder responseBuilder = Response.status(UNAUTHORIZED);
        RestActionReporter ar = new RestActionReporter();
        Request grizzlyRequest = request.get();

        // If the call flow reached here, the request has been authenticated by logic in RestAdapater
        // probably with an admin username and password.  The remoteHostName value
        // in the data object is the actual remote host of the end-user who is
        // using the console (or, conceivably, some other client).  We need to
        // authenticate here once again with that supplied remoteHostName to
        // make sure we enforce remote access rules correctly.
        String hostName = data.get("remoteHostName");
        boolean isAuthorized = false;
        boolean responseErrorStatusSet = false;
        Subject subject = null;
        try {
            subject = ResourceUtil.authenticateViaAdminRealm(locatorBridge.getRemoteLocator(), grizzlyRequest, hostName);
            isAuthorized = ResourceUtil.isAuthorized(locatorBridge.getRemoteLocator(), subject, "domain/rest-sessions/rest-session", "create");
        } catch (RemoteAdminAccessException e) {
            responseBuilder.status(FORBIDDEN);
            responseErrorStatusSet = true;
        } catch (Exception e) {
            ar.setMessage("Error while authenticating " + e);
        }

        if (isAuthorized) {
            responseBuilder.status(OK);

            // Check to see if the username has been set (anonymous user case)
            String username = (String) grizzlyRequest.getAttribute("restUser");
            if (username != null) {
                ar.getExtraProperties().put("username", username);
            }
            ar.getExtraProperties().put("token", sessionManager.createSession(grizzlyRequest.getRemoteAddr(), subject, chooseTimeout(restConfig)));

        } else {
            if ( ! responseErrorStatusSet) {
                responseBuilder.status(UNAUTHORIZED);
            }
        }

        return responseBuilder.entity(new ActionReportResult(ar)).build();
    }

    private int chooseTimeout(final RestConfig restConfig) {
        int inactiveSessionLifeTime = 30 /*mins*/;
        if (restConfig != null) {
            inactiveSessionLifeTime = Integer.parseInt(restConfig.getSessionTokenTimeout());
        }
        return inactiveSessionLifeTime;
    }

    @Path("{sessionId}/")
    public SessionResource getSessionResource(@PathParam("sessionId")String sessionId) {
        return new SessionResource(sessionManager, sessionId, requestHeaders, uriInfo);
    }
}