Get the user's profile. If the user has no assigned profile, the HTTP 404
    is returned. Make a POST request to modify the user's profile.

    GET parameters:
        html
            turn on the HTML version of the API
        username:
            username of user (only for users with public profile)
        stats:
            attache addition user statistics

    POST parameters (JSON):
        send_emails:
            switcher turning on sending e-mails to user
        public:
            swicher making the user's profile publicly available
        user:
            password:
                user's password
            password_check:
                user's password again to check it
            first_name (optional):
                user's first name
            last_name (optional):
                user's last name

def profile(request, status=200):
    """
    Get the user's profile. If the user has no assigned profile, the HTTP 404
    is returned. Make a POST request to modify the user's profile.

    GET parameters:
        html
            turn on the HTML version of the API
        username:
            username of user (only for users with public profile)
        stats:
            attache addition user statistics

    POST parameters (JSON):
        send_emails:
            switcher turning on sending e-mails to user
        public:
            swicher making the user's profile publicly available
        user:
            password:
                user's password
            password_check:
                user's password again to check it
            first_name (optional):
                user's first name
            last_name (optional):
                user's last name
    """
    if request.method == 'GET':
        if request.GET.get("username", False):
            try:
                user_profile = User.objects.get(username=request.GET.get("username"),
                                                userprofile__public=True).userprofile
            except ObjectDoesNotExist:
                raise Http404("user not found or have not public profile")
        else:
            user_id = get_user_id(request)
            if get_config('proso_user', 'google.openid.migration', default=True) and not is_user_id_overridden(request):
                migrated_user = migrate_google_openid_user(request.user)
                if migrated_user is not None:
                    auth.logout(request)
                    migrated_user.backend = 'social.backends.google.GoogleOAuth2'
                    auth.login(request, migrated_user)
            user_profile = get_object_or_404(UserProfile, user_id=user_id)
        return render_json(
            request, user_profile, status=status,
            template='user_profile.html', help_text=profile.__doc__)
    elif request.method == 'POST':
        with transaction.atomic():
            to_save = json_body(request.body.decode("utf-8"))
            user_id = get_user_id(request)
            user_profile = get_object_or_404(UserProfile, user_id=user_id)
            user = to_save.get('user', None)
            if 'send_emails' in to_save:
                user_profile.send_emails = bool(to_save['send_emails'])
            if 'public' in to_save:
                user_profile.public = bool(to_save['public'])
            if user:
                error = _save_user(request, user, new=False)
                if error:
                    return render_json(request, error, template='user_json.html', status=400)
            if 'properties' in to_save:
                user_profile.save_properties(to_save['properties'])
            user_profile.save()
        request.method = "GET"
        return profile(request, status=202)
    else:
        return HttpResponseBadRequest("method %s is not allowed".format(request.method))