Use of a discount card

[f14m07]

We are a sailing association. Boat owners offer places on their boats during their outings. The members-only vogue-et-reve.fr website makes it all possible. The association sells a card containing 20 coupons and acts as a discount card. Members can then pay for their sailing with this card rather than their credit card. A half-day outing then costs €10 instead of €15. A full-day trip costs €20 instead of €25.
Anyone wishing to purchase this card must register for card membership. Once they have paid for their card, they can use it immediately.
Two personalised fields have been created as part of the membership process. The first contains the number of coupons, initially 20, and the second the list of outings when the card will be used.
We also need to prepare the templates for the emails that are sent out when the booking is made, which may need to contain the breakdown.
The booking form is dynamic depending on whether the person has a card with enough coupons available.
A page also needs to be created to allow members to track their tally.
We therefore need a function to update the number of coupons and the history of card use, and another if the booking is cancelled.
Here are the two functions:

<?php
/********************
 * Cancel booking by the booker or by an admin
 * If an event was paid with the discount card
 ********************/
add_action('eme_trash_rsvp_action', 'my_eme_carte2_function');
function my_eme_carte2_function($booking) {
	if ($booking['booking_paid']==1){return;}//if paying online-------------------------------
	//check if the person has a card
	$membership_id=2; //card membership
	$person = eme_get_person ($booking['person_id']);
    $wp_id=$person['wp_id']; // WP_id to have member_id 
    $member = eme_get_member_by_wpid_membershipid($wp_id, $membership_id);
    if ($member==false) {return;} // the person is not in the card membership, nothing to do-----
    
    $answers=eme_get_booking_answers($booking['booking_id']);//we need to know if the member has used his card
    $member_answers=eme_get_member_answers($member['member_id']);
    foreach ($answers as $answer) {
        if ($answer['field_id']=='3'){ //customfield booking answer
            if ($answer['answer']=='Oui'){
                // then we need to update the card	
                //first: the event data, date and price
                $event = eme_get_event( $booking['event_id'] );
                $eme_date_obj = new ExpressiveDate( $event['event_start'], EME_TIMEZONE );
                $date_event = $eme_date_obj->format('d/m/Y');
                $price=(int)$booking['event_price'];
                switch($price) {
                    case 15: $consomme=1; break;
                    case 25: $consomme=2; break;
                    default: $consomme=0; break;
                }
                $consomme=(int)$consomme;
                //end event data
                //second: the answers of the member (nbre_coupons and history)
                foreach ($member_answers as $member_answer){
                    if ($member_answer['field_id']==4){
                        $nbre_coupons=(int)$member_answer['answer'];// coupons before trash RSVP
                        $nbre_coupons = $nbre_coupons+$consomme;//coupons are issued
                        $nbre_coupons_string = (string)$nbre_coupons;
                        eme_update_answer( $member_answer['answer_id'], $nbre_coupons_string);// update coupons
                    }
                    if ($member_answer['field_id']==5){
                        $dates=(string)$member_answer['answer'];//history before trash RSVP
                        //Adding the elements of the cancel booking
                        $history="{$dates}\nA_+{$consomme}_nav_id_{$booking['event_id']}_du_{$date_event}_reste_{$nbre_coupons_string}";
                        eme_update_answer( $member_answer['answer_id'], $history);
                    }
                }
            }
        }    
    }
}

/************************
 * Booking with the discount card
 *
 * Upfate the card if used to pay
 ************************/
add_action('eme_insert_rsvp_action', 'my_eme_carte_function');
function my_eme_carte_function($booking) {
	if ($booking['booking_paid']==1){return;}//get out if payinf online--------------------------------------------------------------
	$membership_id=2; //card membership_id
    $person = eme_get_person ($booking['person_id']);
    $wp_id=$person['wp_id']; // wp_id is necessary to find member_id
    $member = eme_get_member_by_wpid_membershipid($wp_id, $membership_id); //tableau du membre connecté de adhesion carte
    if ($member==false) return; // get out if the person has no card-----------------------------------------------------

    $answers=eme_get_booking_answers($booking['booking_id']);
    $member_answers=eme_get_member_answers($member['member_id']);    
    foreach ($answers as $answer) {
        if ($answer['field_id']=='3'){ //if the member used his card
            if ($answer['answer']=='Oui'){
                // then we need to update the card	
                //first: the event data, date and price
                $event = eme_get_event( $booking['event_id'] );
                $eme_date_obj = new ExpressiveDate( $event['event_start'], EME_TIMEZONE );
                $date_event = $eme_date_obj->format('d/m/Y');
                $location = eme_get_location( $event['location_id'] );
                $location_name=$location['location_name'];
                $price=(int)$booking['event_price'];
                switch($price) {
                    case 15: $consomme=1; break;
                    case 25: $consomme=2; break;
                    default: $consomme=0; break;
                }
                $consomme=(int)$consomme;
                //end event data
                
                //update customfields cart
                foreach ($member_answers as $member_answer){
                    if ($member_answer['field_id']==4){
                        $nbre_coupons=(int)$member_answer['answer'];// coupons before booking
                        // update coupons
                        $nbre_coupons = $nbre_coupons-$consomme;//coupons used are withdrawn
                        $nbre_coupons_string = (string)$nbre_coupons;
                        eme_update_answer( $member_answer['answer_id'], $nbre_coupons_string);
                    }
                    if ($member_answer['field_id']==5){
                        $dates=(string)$member_answer['answer'];//history before booking
                        //Adding the elements of the new booking
                        $history="{$dates}\nR_-{$consomme}_nav_id_{$booking['event_id']}_du_{$date_event}_sur_{$location_name}_reste_{$nbre_coupons_string}";
                        eme_update_answer( $member_answer['answer_id'], $history);      
                    }
                }
            }     
        }
    }
}

[f14m07]

Thanks to Franky who helped me a lot with this project.