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EntitlementObserver.php
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EntitlementObserver.php
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<?php
namespace App\Observers;
use App\Entitlement;
use Carbon\Carbon;
/**
* This is an observer for the Entitlement model definition.
*/
class EntitlementObserver
{
/**
* Handle the "creating" event on an Entitlement.
*
* Ensures that the entry uses a custom ID (uuid).
*
* Ensures that the {@link \App\Wallet} to which it is to be billed is owned or controlled by
* the {@link \App\User} entitled.
*
* @param Entitlement $entitlement The entitlement being created.
*
* @return bool
*/
public function creating(Entitlement $entitlement): bool
{
while (true) {
$allegedly_unique = \App\Utils::uuidStr();
if (!Entitlement::find($allegedly_unique)) {
$entitlement->{$entitlement->getKeyName()} = $allegedly_unique;
break;
}
}
// can't dispatch job here because it'll fail serialization
// Make sure the owner is at least a controller on the wallet
$wallet = \App\Wallet::find($entitlement->wallet_id);
if (!$wallet || !$wallet->owner) {
return false;
}
$sku = \App\Sku::find($entitlement->sku_id);
if (!$sku) {
return false;
}
$result = $sku->handler_class::preReq($entitlement, $wallet->owner);
if (!$result) {
return false;
}
return true;
}
/**
* Handle the entitlement "created" event.
*
* @param \App\Entitlement $entitlement The entitlement.
*
* @return void
*/
public function created(Entitlement $entitlement)
{
$entitlement->entitleable->updated_at = Carbon::now();
$entitlement->entitleable->save();
$entitlement->createTransaction(\App\Transaction::ENTITLEMENT_CREATED);
}
/**
* Handle the entitlement "deleted" event.
*
* @param \App\Entitlement $entitlement The entitlement.
*
* @return void
*/
public function deleted(Entitlement $entitlement)
{
// Remove all configured 2FA methods from Roundcube database
if ($entitlement->sku->title == '2fa') {
// FIXME: Should that be an async job?
$sf = new \App\Auth\SecondFactor($entitlement->entitleable);
$sf->removeFactors();
}
$entitlement->entitleable->updated_at = Carbon::now();
$entitlement->entitleable->save();
$entitlement->createTransaction(\App\Transaction::ENTITLEMENT_DELETED);
}
public function deleting(Entitlement $entitlement)
{
// Start calculating the costs for the consumption of this entitlement if the
// existing consumption spans >= 14 days.
//
// Effect is that anything's free for the first 14 days
if ($entitlement->created_at >= Carbon::now()->subDays(14)) {
return;
}
$owner = $entitlement->wallet->owner;
// Determine if we're still within the free first month
$freeMonthEnds = $owner->created_at->copy()->addMonthsWithoutOverflow(1);
if ($freeMonthEnds >= Carbon::now()) {
return;
}
$cost = 0;
// get the discount rate applied to the wallet.
$discount = $entitlement->wallet->getDiscountRate();
// just in case this had not been billed yet, ever
$diffInMonths = $entitlement->updated_at->diffInMonths(Carbon::now());
$cost += (int) ($entitlement->cost * $discount * $diffInMonths);
// this moves the hypothetical updated at forward to however many months past the original
$updatedAt = $entitlement->updated_at->copy()->addMonthsWithoutOverflow($diffInMonths);
// now we have the diff in days since the last "billed" period end.
// This may be an entitlement paid up until February 28th, 2020, with today being March
// 12th 2020. Calculating the costs for the entitlement is based on the daily price for the
// past month -- i.e. $price/29 in the case at hand -- times the number of (full) days in
// between the period end and now.
//
// a) The number of days left in the past month, 1
// b) The cost divided by the number of days in the past month, for example, 555/29,
// c) a) + Todays day-of-month, 12, so 13.
//
$diffInDays = $updatedAt->diffInDays(Carbon::now());
$dayOfThisMonth = Carbon::now()->day;
// days in the month for the month prior to this one.
// the price per day is based on the number of days left in the last month
$daysInLastMonth = \App\Utils::daysInLastMonth();
$pricePerDay = (float)$entitlement->cost / $daysInLastMonth;
$cost += (int) (round($pricePerDay * $discount * $diffInDays, 0));
if ($cost == 0) {
return;
}
$entitlement->wallet->debit($cost);
}
}

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