felicity-iiith / felicity18-website

        return $this->is_registered('paper_presentation', $user_nick);

    }

    public function register_for_paper_presentation($info) {

        return $this->db_lib->prepared_execute(

            $this->DB->contest,

            "INSERT INTO `paper_presentation`

            (`nick`, `contact_number`, `paper_link`)

            VALUES  (?, ?, ?)",

            "sss",

            [

                $info['nick'],

                $info['contact_number'],

                $info['paper_link'],

            ],

            false

        );

    }

    /*

    |---------------------------------------------------------------------------

        return $this->is_registered('visualizeit', $user_nick);

    }

    public function register_for_visualizeit($info) {

        return $this->db_lib->prepared_execute(

            $this->DB->contest,

            "INSERT INTO `visualizeit`

            (`nick`, `paper_link`)

            VALUES  (?, ?)",

            "ss",

            [

                $info['nick'],

                $info['paper_link'],

            ],

            false

        );

    }

    /*

    |---------------------------------------------------------------------------

        return $this->is_registered('arvr_registrations', $user_nick);

    }

    public function register_for_arvr($info) {

        return $this->db_lib->prepared_execute(

            $this->DB->contest,

            "INSERT INTO `arvr_registrations`

            (`nick`, `contact_number`)

            VALUES  (?, ?)",

            "ss",

            [

                $info['nick'],

                $info['contact_number'],

            ],

            false

        );

    }

    public function arvr_payment_success($payment_id, $nick, $status, $payment_data) {

        $stmt = $this->db_lib->prepared_execute(