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camper/revert/draft_payment.sql

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Add the number of maximum nights that tourist tax applies This is required by law. I do not know why i have this value and the tax amount in the database, but the payment percent and the number of days are hardcoded. I guess i am such an inconsistent mess.
2024-02-27 18:45:47 +00:00
-- Deploy camper:draft_payment to pg
-- requires: roles
-- requires: schema_camper
-- requires: season_calendar
-- requires: season
-- requires: campsite_type
-- requires: campsite_type_pet_cost
-- requires: campsite_type_cost
-- requires: campsite_type_option_cost
-- requires: campsite_type_option
-- requires: payment
-- requires: payment_option
Add payment relation and use it to compute the booking’s cart I had to add the payment concept separate from the booking, unlike other eCommerce solutions that subsume the two into a single “order”, like WooCommerce, because bookings should be done in a separate Camper instance that will sync to the public instance, but the payment is done by the public instance. There will be a queue or something between the public and the private instance to pass along the booking information once the payment is complete, but the public instance still needs to keep track of payments without creating bookings. To compute the total for that payment i had to do the same as was doing until now for the cart. To prevent duplications, or having functions with complex return types, i now create a “draft” payment while the user is filling in the form, and compute the cart there; from Go i only have to retrieve the data from the relation, that simplifies the work, actually. Since the payment is computed way before customers enter their details, i can not have that data in the same payment relation, unless i allow NULL values. Allowing NULL values means that i can create a payment without customer, thus i moved all customer details to a separate relation. It still allows payment without customer, but at least there are no NULL values. Draft payments should be removed after a time, but i believe this needs to be done in a cronjob or similar, not in the Go application. To update the same payment while filling the same booking form, i now have a hidden field with the payment slug. A competent developer would have used a cookie or something like that; i am not competent.
2024-02-12 04:21:00 +00:00
begin;
Add the number of maximum nights that tourist tax applies This is required by law. I do not know why i have this value and the tax amount in the database, but the payment percent and the number of days are hardcoded. I guess i am such an inconsistent mess.
2024-02-27 18:45:47 +00:00
set search_path to camper, public;
Add payment relation and use it to compute the booking’s cart I had to add the payment concept separate from the booking, unlike other eCommerce solutions that subsume the two into a single “order”, like WooCommerce, because bookings should be done in a separate Camper instance that will sync to the public instance, but the payment is done by the public instance. There will be a queue or something between the public and the private instance to pass along the booking information once the payment is complete, but the public instance still needs to keep track of payments without creating bookings. To compute the total for that payment i had to do the same as was doing until now for the cart. To prevent duplications, or having functions with complex return types, i now create a “draft” payment while the user is filling in the form, and compute the cart there; from Go i only have to retrieve the data from the relation, that simplifies the work, actually. Since the payment is computed way before customers enter their details, i can not have that data in the same payment relation, unless i allow NULL values. Allowing NULL values means that i can create a payment without customer, thus i moved all customer details to a separate relation. It still allows payment without customer, but at least there are no NULL values. Draft payments should be removed after a time, but i believe this needs to be done in a cronjob or similar, not in the Go application. To update the same payment while filling the same booking form, i now have a hidden field with the payment slug. A competent developer would have used a cookie or something like that; i am not competent.
2024-02-12 04:21:00 +00:00
Add the number of maximum nights that tourist tax applies This is required by law. I do not know why i have this value and the tax amount in the database, but the payment percent and the number of days are hardcoded. I guess i am such an inconsistent mess.
2024-02-27 18:45:47 +00:00
create or replace function draft_payment(payment_slug uuid, arrival_date date, departure_date date, campsite_type_slug uuid, num_adults integer, num_teenagers integer, num_children integer, num_dogs integer, zone_preferences text, options option_units[]) returns payment as
$$
declare
p payment;
begin
if exists(select 1 from payment where slug = payment_slug and payment_status <> 'draft') then
payment_slug = null;
end if;
insert into payment (
slug
, company_id
, campsite_type_id
, arrival_date
, departure_date
, subtotal_nights
, number_adults
, subtotal_adults
, number_teenagers
, subtotal_teenagers
, number_children
, subtotal_children
, number_dogs
, subtotal_dogs
, subtotal_tourist_tax
, total
, currency_code
, down_payment_percent
, zone_preferences
)
select coalesce(payment_slug, gen_random_uuid())
, company_id
, campsite_type_id
, arrival_date
, departure_date
, sum(cost.cost_per_night * ceiling((num_adults::numeric + num_teenagers::numeric + num_children::numeric) / max_campers::numeric)::integer)::integer
, num_adults
, sum(cost_per_adult * num_adults)::integer
, num_teenagers
, sum(cost_per_teenager * num_teenagers)::integer
, num_children
, sum(cost_per_child * num_children)::integer
, num_dogs
, sum(case when num_dogs > 0 then coalesce(pet.cost_per_night, 0) else 0 end)::integer
, sum(tourist_tax * num_adults)::integer
, 0
, currency_code
, case when arrival_date - current_date >= 7 then 0.3 else 1.0 end
, coalesce(zone_preferences, '')
from generate_series(arrival_date, departure_date - 1, interval '1 day') as date(day)
left join season_calendar on season_range @> date.day::date
left join season using (season_id)
left join campsite_type using (company_id)
left join campsite_type_pet_cost as pet using (campsite_type_id)
left join campsite_type_cost as cost using (campsite_type_id, season_id)
left join company using (company_id)
where campsite_type.slug = campsite_type_slug
group by company_id
, campsite_type_id
, currency_code
on conflict (slug) do update
set company_id = excluded.company_id
, campsite_type_id = excluded.campsite_type_id
, arrival_date = excluded.arrival_date
, departure_date = excluded.departure_date
, subtotal_nights = excluded.subtotal_nights
, number_adults = excluded.number_adults
, subtotal_adults = excluded.subtotal_adults
, number_teenagers = excluded.number_teenagers
, subtotal_teenagers = excluded.subtotal_teenagers
, number_children = excluded.number_children
, subtotal_children = excluded.subtotal_children
, number_dogs = excluded.number_dogs
, subtotal_dogs = excluded.subtotal_dogs
, subtotal_tourist_tax = excluded.subtotal_tourist_tax
, total = excluded.total
, currency_code = excluded.currency_code
, down_payment_percent = excluded.down_payment_percent
, zone_preferences = excluded.zone_preferences
, updated_at = current_timestamp
returning *
into p
;
if array_length(coalesce(options, array[]::option_units[]), 1) > 0 then
delete
from payment_option
where payment_id = p.payment_id
and campsite_type_option_id not in (
select campsite_type_option_id
from unnest(options) as option(campsite_type_option_id, units)
);
insert into payment_option (
payment_id
, campsite_type_option_id
, units
, subtotal
)
select p.payment_id
, campsite_type_option_id
, units
, case when per_night then sum(cost * units)::integer else max(cost * units)::integer end
from generate_series(arrival_date, departure_date - 1, interval '1 day') as date(day)
join season_calendar on season_range @> date.day::date
join campsite_type_option_cost using (season_id)
join campsite_type_option using (campsite_type_option_id)
join unnest(options) as option(campsite_type_option_id, units) using (campsite_type_option_id)
group by campsite_type_option_id
, units
, per_night
on conflict (payment_id, campsite_type_option_id) do update
set units = excluded.units
, subtotal = excluded.subtotal
;
with option as (
select sum(subtotal)::integer as subtotal
from payment_option
where payment_id = p.payment_id
)
update payment
set total = subtotal_nights + subtotal_adults + subtotal_teenagers + subtotal_children + subtotal_dogs + subtotal_tourist_tax + coalesce(option.subtotal, 0)
from option
where payment_id = p.payment_id
returning total into p.total
;
else
delete
from payment_option
where payment_id = p.payment_id;
update payment
set total = subtotal_nights + subtotal_adults + subtotal_teenagers + subtotal_children + subtotal_dogs + subtotal_tourist_tax
where payment_id = p.payment_id
returning total into p.total
;
end if;
return p;
end;
$$
language plpgsql
;
revoke execute on function draft_payment(uuid, date, date, uuid, integer, integer, integer, integer, text, option_units[]) from public;
grant execute on function draft_payment(uuid, date, date, uuid, integer, integer, integer, integer, text, option_units[]) to guest;
grant execute on function draft_payment(uuid, date, date, uuid, integer, integer, integer, integer, text, option_units[]) to employee;
grant execute on function draft_payment(uuid, date, date, uuid, integer, integer, integer, integer, text, option_units[]) to admin;
Add payment relation and use it to compute the booking’s cart I had to add the payment concept separate from the booking, unlike other eCommerce solutions that subsume the two into a single “order”, like WooCommerce, because bookings should be done in a separate Camper instance that will sync to the public instance, but the payment is done by the public instance. There will be a queue or something between the public and the private instance to pass along the booking information once the payment is complete, but the public instance still needs to keep track of payments without creating bookings. To compute the total for that payment i had to do the same as was doing until now for the cart. To prevent duplications, or having functions with complex return types, i now create a “draft” payment while the user is filling in the form, and compute the cart there; from Go i only have to retrieve the data from the relation, that simplifies the work, actually. Since the payment is computed way before customers enter their details, i can not have that data in the same payment relation, unless i allow NULL values. Allowing NULL values means that i can create a payment without customer, thus i moved all customer details to a separate relation. It still allows payment without customer, but at least there are no NULL values. Draft payments should be removed after a time, but i believe this needs to be done in a cronjob or similar, not in the Go application. To update the same payment while filling the same booking form, i now have a hidden field with the payment slug. A competent developer would have used a cookie or something like that; i am not competent.
2024-02-12 04:21:00 +00:00
commit;