Element_OphTrOperationbooking_Operation::getWaitingListStatus PHP Méthode

    public function getWaitingListStatus()
    {
        if (is_null($this->getLastLetter())) {
            return self::STATUS_PURPLE;
            // no invitation letter has been sent
        } elseif (is_null($this->date_letter_sent->date_invitation_letter_sent) and is_null($this->date_letter_sent->date_1st_reminder_letter_sent) and is_null($this->date_letter_sent->date_2nd_reminder_letter_sent) and is_null($this->date_letter_sent->date_gp_letter_sent)) {
            return self::STATUS_PURPLE;
            // no invitation letter has been sent
        }
        $now = new DateTime();
        $now->setTime(0, 0, 0);
        // $two_weeks_ago = $now->modify('-14 days');
        $now = new DateTime();
        $now->setTime(0, 0, 0);
        // $one_week_ago = $now->modify('-7 days');
        // if the last letter was the invitation and it was sent over two weeks ago from now:
        $date_sent = new DateTime($this->date_letter_sent->date_invitation_letter_sent);
        $date_sent->setTime(0, 0, 0);
        if ($this->getLastLetter() == self::LETTER_INVITE and $now->getTimestamp() - $date_sent->getTimestamp() > 1209600) {
            return self::STATUS_GREEN1;
        }
        // if the last letter was the 1st reminder and it was sent over two weeks ago from now:
        $date_sent = new DateTime($this->date_letter_sent->date_1st_reminder_letter_sent);
        $date_sent->setTime(0, 0, 0);
        if ($this->getLastLetter() == self::LETTER_REMINDER_1 and $now->getTimestamp() - $date_sent->getTimestamp() > 1209600) {
            return self::STATUS_GREEN2;
        }
        // if the last letter was the 2nd reminder and it was sent over two weeks ago from now:
        $date_sent = new DateTime($this->date_letter_sent->date_2nd_reminder_letter_sent);
        $date_sent->setTime(0, 0, 0);
        if ($this->getLastLetter() == self::LETTER_REMINDER_2 and $now->getTimestamp() - $date_sent->getTimestamp() > 1209600) {
            return self::STATUS_ORANGE;
        }
        // if the last letter was the gp letter and it was sent over one week ago from now:
        $date_sent = new DateTime($this->date_letter_sent->date_gp_letter_sent);
        $date_sent->setTime(0, 0, 0);
        if ($this->getLastLetter() == self::LETTER_GP and $now->getTimestamp() - $date_sent->getTimestamp() > 604800) {
            return self::STATUS_RED;
        }
        return;
    }