'Session will be saved to database with proper Event id
:param no_name:
:param use_current_user:
:param state:
:param request: The request
:param event_id: Session belongs to Event by event id'

@staticmethod
def add_session_to_event(request, event_id, state=None, use_current_user=True, no_name=False):

    form = request.form
    slide_temp_url = form.get('slides_url')
    video_temp_url = form.get('video_url')
    audio_temp_url = form.get('audio_url')
    slide_file = ''
    video_file = ''
    audio_file = ''
    if slide_temp_url:
        slide_file = UploadedFile(get_path_of_temp_url(slide_temp_url), slide_temp_url.rsplit('/', 1)[1])
    if video_temp_url:
        video_file = UploadedFile(get_path_of_temp_url(video_temp_url), video_temp_url.rsplit('/', 1)[1])
    if audio_temp_url:
        audio_file = UploadedFile(get_path_of_temp_url(audio_temp_url), audio_temp_url.rsplit('/', 1)[1])
    if (not state):
        state = form.get('state', 'draft')
    event = DataGetter.get_event(event_id)
    new_session = Session(title=form.get('title', ''), subtitle=form.get('subtitle', ''), long_abstract=form.get('long_abstract', ''), starts_at=event.starts_at, ends_at=(event.starts_at + timedelta(hours=1)), event_id=event_id, short_abstract=form.get('short_abstract', ''), level=form.get('level', ''), comments=form.get('comments', ''), language=form.get('language', ''), state=state)
    if (form.get('track', None) != ''):
        new_session.track_id = form.get('track', None)
    if (form.get('session_type', None) != ''):
        new_session.session_type_id = form.get('session_type', None)
    if (form.get('email', '') != ''):
        speaker = Speaker.query.filter_by(email=form.get('email', '')).filter_by(event_id=event_id).first()
        speaker = save_speaker(request, event_id=event_id, speaker=speaker, user=(login.current_user if use_current_user else None), no_name=no_name)
        new_session.speakers.append(speaker)
    save_to_db(new_session, 'Session    saved')
    if (state == 'pending'):
        trigger_new_session_notifications(new_session.id, event=event)
    if ((slide_temp_url != '') and slide_file):
        slide_url = upload(slide_file, UPLOAD_PATHS['sessions']['slides'].format(event_id=int(event_id), id=int(new_session.id)))
        new_session.slides = slide_url
    if ((audio_temp_url != '') and audio_file):
        audio_url = upload(audio_file, UPLOAD_PATHS['sessions']['audio'].format(event_id=int(event_id), id=int(new_session.id)))
        new_session.audio = audio_url
    if ((video_temp_url != '') and video_file):
        video_url = upload(video_file, UPLOAD_PATHS['sessions']['video'].format(event_id=int(event_id), id=int(new_session.id)))
        new_session.video = video_url
    record_activity('create_session', session=new_session, event_id=event_id)
    update_version(event_id, False, 'sessions_ver')
    invite_emails = form.getlist('speakers[email]')
    for (index, email) in enumerate(invite_emails):
        if (not string_empty(email)):
            new_invite = Invite(event_id=event_id, session_id=new_session.id)
            hash = random.getrandbits(128)
            new_invite.hash = ('%032x' % hash)
            save_to_db(new_invite, 'Invite    saved')
            link = url_for('event_sessions.invited_view', session_id=new_session.id, event_id=event_id, _external=True)
            Helper.send_email_invitation(email, new_session.title, link)
            user = DataGetter.get_user_by_email(email, no_flash=True)
            if user:
                cfs_link = url_for('event_detail.display_event_cfs', identifier=event.identifier)
                Helper.send_notif_invite_papers(user, event.name, cfs_link, link)
