To send the actual mail with sendmail, i have stolen the code from
go-mail[0] and removed everything i did not need. This is because there
is no Go package to send email in Debian 12, and this was easier than
to build the DEB for go-mail.
Once i have the time….
[0]: https://go-mail.dev/
I have to basically do the reverse of signing the request to verify that
the notification comes from them. Lots of code just for that.
I return the changed status from the PL/pgSQL function because i will
need to email customers when a payment is completed, and i need to know
when.
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.
Customer told us that there are some options, such as towels, that have
a fixed price for the whole stay, not a per night price. Thus, had to
add a boolean to know whether to use sum or max when computing the
cart’s total for each option.
It is a separate relation, instead of having a field in campsite_type,
because not all campsite types allow dogs. I could have added a new
field to campsite_type, but then its values it would be meaningless for
campsites that do not allow dogs, and a nullable field is not a valid
solution because NULL means “unknown”, but we **do** know the price —
none.
A separate relation encodes the same information without ambiguities nor
null values, and, in fact, removed the dogs_allowed field from
campsite_type to prevent erroneous status, such as a campsite type that
allows dogs without having a cost — even if the cost is zero, it has to
be added to the new relation.
Besides the dynamic final cart, that was already handled by HTMx, i had
to check the maximum number of guests, whether the accommodation allows
“overflow”, whether dogs are allowed, and that the booking dates were
within the campground’s opening and closing dates.
I could do all of this with AlpineJS, but then i would have to add the
same validation to the backend, prior to accept the payment. Would not
make more sense to have them in a single place, namely the backend? With
HTMx i can do that.
However, i now have to create the form “piecemeal”, because i may not
have the whole information when the visitor arrives to the booking page,
and i still had the same problem as in commit d2858302efa—parsing the
whole form as is would leave guests and options field empty, rather than
at their minimum values.
One of the fieldsets in that booking form are the arrival and departure
dates, that are the sames we use in the campsite type’s page to
“preselect” these values. Since now are in a separate struct, i can
reuse the same type and validation logic for both pages, making my
JavaScript code useless, but requiring HTMx. I think this is a good
tradeoff, in fact.
I have to ask number and age ranges of hosts of guests for all campsite
types, not only those that have price options for adults, children, etc.
because i must compute the tourist tax for adults. These numbers will
be used to generate de rows for guests when actually creating the
booking, which is not done already.
To satisfy the campsite types that do have a price per guest, not only
per night, i had to add the prices for each range in the
campsite_type_cost relation. If a campsite type does not have price
per person, then that should be zero; the website then does not display
the price.
The minimal price for any campsite type is one adult for one night,
thus to compute the price i need at least the campsite type, the dates,
and the number of adults, that has a minimum of one. I changed the
order of the form to ask for these values first, so i can compute the
initial price as soon as possible. To help further, i show the
<fieldset>s progressively when visitors select options.
Customer told us that the minimum number of nights is per campsite type,
not per season. And he wants this, along with the maximum number of
nights, in order to limit the range of departure dates that guests can
choose when booking.
The “overflow” is for when people want to book plots for more guests
than is permitted, which the system would need to add a new plot to the
“shopping cart”, as it were; not implemented yet.
The ask zone preferences is to whether show the corresponding input on
the booking form, that it was done implicitly when the campsite type had
options, because up until now it was only for plots, but it is no longer
the case, thus i need to know when to show it; now it is explicit.
This is more or less the same as the campsites, as public information
goes, but for buildings and other amenities that the camping provides
that are not campsites.
Until now i always had the translations be empty strings if some columns
did not have the full translation, but this is going too far on the
non-NULL policy: surely they have a translations, but we do not know it
yet; this is the exact type of situations NULL values are for.
Besides the philosophical distinction, having empty strings instead of
NULLs is less practical, because i no longer can user coalesce() to
retrieve the default language text in case the translation for that
particular field is not available, even if the row for a locale exists.
In time i will change all _i18n relations, but for now only these from
campsite follow the “new policy”.
A small page with a brief description, carousel, and feature list of
each individual accommodation.
Most of the relations and functions for carousel and features are like
the ones for campsite types, but i had to use the accommodation’s label
to find them, because they do not have slugs; i did not even though
these would be public, and they already have a label, although not
unique for all companies, like UUID slugs are.
Apparently, each campsite type could have different check-in and
check-out times, thus i need them in the database.
I thought about using an integer or a datetime field, but customer seems
to want a text field to maybe add “before” and “after” there as well.
Translatable text it is.
Otherwise, we can not show the error message to the user, although it
assumes only the default language has error message, which is the case
for now, but….
This is mostly because it is required for the “Digital Kit”, but it also
works in our favor because now i can version the URL to the static
resources.
Go 1.18 adds the info from git if the package is build from a git
repository, but this is not the case in OBS, so i instead relay on a
constant for the version number. This constant is “updated” by Debian’s
rules, mostly due to the discussion in [0].
[0]: https://github.com/golang/go/issues/22706
There is no way, for now, to add, edit or remove users, because
currently we only need to list users.
I can not give admins access to the user table, for security
permissions, so i had to create a new view. I could name it also ‘user’
in ‘camper’ scheme, but then i was afraid i would have problems with
unit tests and their search_path, so instead i called it
‘company_user_profile’, which is like ‘user_profile’ but for all users
in ‘company_user’.
I created a new Go package for it, rather than add the admin handler in
‘auth’, because ‘template’ depends on ‘auth’, and rendering from ‘auth’
would cause a dependency loop.
I needed to have the roles in gettext to translate them, but there is
no obvious place where to put the call to PgettextNoop. For now, there
are in ‘NewAdminHandler’ because it is called once in the application’s
lifetime and they actually do not matter much.
This is a separate carousel from the one displayed at the bottom with
location info; it is, i suppose, a carousel for the hero image.
For the database, it works exactly as the home carousel, but on the
front had to use AlpineJS instead of Slick because it needs to show a
text popping up from the bottom when the slide is show, something i do
not know how to do in Slick.
It now makes no sense to have the carousel inside the “nature” section,
because the heading is no longer in there, and moved it out into a new
“hero” div.
Since i now have two carousels in home, i had to add additional
attributes to carousel.AdminHandler to know which URL to point to when
POSTing, PUTting, or redirecting.
Customer does not want the new “masonry-like” design of the surroundings
page, and wants the same style they already had: a regular list with
text and photo, alternating the photo’s side.
And, of course, they want to be able to add and edit them themselves. It
is like another carousel, but with an additional rich-text description.
The photos that we had in that page are no longer of use.
Had to create a custom build of CKEditor with the following plugins
added-in:
* Autoformat
* Block quote
* Bold
* General HTML Support
* Heading
* Image
* Image caption
* Image resize
* Image style
* Image toolbar
* Image upload
* Indent
* Italic
* Link
* Link image
* List
* Media embed
* Simple upload adapter
* Source editing
* Table
* Table toolbar
* Text transformation
The important bit is the “Simple uploader adapter”, that i modified to
upload the file as `media` instead of the default `upload` (i.e.,
modified ckeditor.js to replace "upload" with "media").
I also had to add the CSRF header somewhere in the HTML document for
JavaScript to be able to retrieve it and pass it to the uploader
adapter, or i would have to disable CSRF validation in that form, which
i did not like at all.
jordi fita mas