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Billing issues fixes (#4173)

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* Multiple billing fixes

- Fix the open charge not having its amount + interval updated after
promoting the expiring subscription
- Fix proration rate being miscalculated (assumed the current
subscription interval was always monthly)
- Fix the open charge's interval and amount being updated on PATCH
/subscription/:id even if the payment intent was never confirmed

* Appease clippy

* Update apps/labrinth/src/routes/internal/billing.rs

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Signed-off-by: François-Xavier Talbot <108630700+fetchfern@users.noreply.github.com>

---------

Signed-off-by: François-Xavier Talbot <108630700+fetchfern@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
This commit is contained in:
François-Xavier Talbot
2025-08-14 19:59:37 -04:00
committed by GitHub
parent 4f789a0ebc
commit 9b5f172170
1 changed files with 65 additions and 52 deletions
Download Patch File Download Diff File Expand all files Collapse all files

117
apps/labrinth/src/routes/internal/billing.rs
View File

@@ -409,23 +409,6 @@ pub async fn edit_subscription(
}
}
if let Some(interval) = &edit_subscription.interval
&& let Price::Recurring { intervals } = &current_price.prices
{
// For expiring charges, the interval is handled in the Product branch.
if open_charge.status != ChargeStatus::Expiring {
if let Some(price) = intervals.get(interval) {
open_charge.subscription_interval = Some(*interval);
open_charge.amount = *price as i64;
} else {
return Err(ApiError::InvalidInput(
"Interval is not valid for this subscription!"
.to_string(),
));
}
}
}
let intent = if let Some(product_id) = &edit_subscription.product {
let product_price =
product_item::DBProductPrice::get_all_product_prices(
@@ -444,7 +427,7 @@ pub async fn edit_subscription(
if product_price.id == current_price.id {
return Err(ApiError::InvalidInput(
"You may not change the price of this subscription!"
"You cannot use the existing product when modifying a subscription! Modifications to only the billing interval aren't yet supported."
.to_string(),
));
}
@@ -523,6 +506,9 @@ pub async fn edit_subscription(
);
metadata.insert("modrinth_new_region".to_string(), new_region);
// No need to specify `modrinth_update_subscription_interval`, the next
// charge's interval should be the same at `modrinth_subscription_interval`.
intent.customer = Some(customer_id);
intent.metadata = Some(metadata);
intent.receipt_email = user.email.as_deref();
@@ -556,7 +542,7 @@ pub async fn edit_subscription(
// The charge is not an expiring charge, need to prorate.
let interval = open_charge.due - Utc::now();
let duration = PriceDuration::Monthly;
let duration = subscription.interval;
let current_amount = match &current_price.prices {
Price::OneTime { price } => *price,
@@ -620,6 +606,16 @@ pub async fn edit_subscription(
)
})?;
// Add either the *new* interval or the *current* interval to the metadata.
// Once the proration charge succeeds, the open charge's interval will be updated
// to reflect this attached interval.
//
// The proration charge will also have this interval attached to itself, though
// it doesn't necessarily have much significance.
let new_subscription_interval = edit_subscription
.interval
.or(open_charge.subscription_interval);
let mut intent =
CreatePaymentIntent::new(proration as i64, currency);
@@ -642,8 +638,7 @@ pub async fn edit_subscription(
);
metadata.insert(
"modrinth_subscription_interval".to_string(),
open_charge
.subscription_interval
new_subscription_interval
.unwrap_or(PriceDuration::Monthly)
.as_str()
.to_string(),
@@ -659,6 +654,13 @@ pub async fn edit_subscription(
);
}
if let Some(interval) = &edit_subscription.interval {
metadata.insert(
"modrinth_update_subscription_interval".to_string(),
interval.as_str().to_string(),
);
}
intent.customer = Some(customer_id);
intent.metadata = Some(metadata);
intent.receipt_email = user.email.as_deref();
@@ -1652,15 +1654,16 @@ pub async fn stripe_webhook(
charge.upsert(transaction).await?;
if let Some(subscription_id) = charge.subscription_id {
let Some(mut subscription) =
user_subscription_item::DBUserSubscription::get(
let maybe_subscription = user_subscription_item::DBUserSubscription::get(
subscription_id,
pool,
)
.await?
else {
break 'metadata;
};
.await?;
let Some(mut subscription) = maybe_subscription
else {
break 'metadata;
};
match charge.type_ {
ChargeType::OneTime
@@ -1714,12 +1717,13 @@ pub async fn stripe_webhook(
break 'metadata;
};
let Some(product) = product_item::DBProduct::get(
let maybe_product = product_item::DBProduct::get(
price.product_id,
pool,
)
.await?
else {
.await?;
let Some(product) = maybe_product else {
break 'metadata;
};
@@ -1735,31 +1739,31 @@ pub async fn stripe_webhook(
if intervals.get(&interval).is_some() {
let Some(subscription_id) = metadata
.get("modrinth_subscription_id")
.and_then(|x| parse_base62(x).ok())
.map(|x| {
crate::database::models::ids::DBUserSubscriptionId(x as i64)
}) else {
break 'metadata;
};
.get("modrinth_subscription_id")
.and_then(|x| parse_base62(x).ok())
.map(|x| {
crate::database::models::ids::DBUserSubscriptionId(x as i64)
}) else {
break 'metadata;
};
let subscription = if let Some(mut subscription) = user_subscription_item::DBUserSubscription::get(subscription_id, pool).await? {
subscription.status = SubscriptionStatus::Unprovisioned;
subscription.price_id = price_id;
subscription.interval = interval;
subscription.status = SubscriptionStatus::Unprovisioned;
subscription.price_id = price_id;
subscription.interval = interval;
subscription
} else {
user_subscription_item::DBUserSubscription {
id: subscription_id,
user_id,
price_id,
interval,
created: Utc::now(),
status: SubscriptionStatus::Unprovisioned,
metadata: None,
}
};
subscription
} else {
user_subscription_item::DBUserSubscription {
id: subscription_id,
user_id,
price_id,
interval,
created: Utc::now(),
status: SubscriptionStatus::Unprovisioned,
metadata: None,
}
};
if charge_status != ChargeStatus::Failed {
subscription
@@ -2094,6 +2098,7 @@ pub async fn stripe_webhook(
// Otherwise, if there *is* an open charge, the subscription was upgraded
// and the just-processed payment was the proration charge. In this case,
// the existing open charge must be updated to reflect the new product's price.
// The subscription interval was updated above.
//
// If there are no open charges, the just-processed payment was a recurring
// or initial subscription charge, and we need to create the next charge.
@@ -2105,7 +2110,15 @@ pub async fn stripe_webhook(
charge.payment_platform =
PaymentPlatform::Stripe;
charge.last_attempt = None;
charge.subscription_interval =
Some(subscription.interval);
charge.amount = new_price as i64;
charge.price_id =
metadata.product_price_item.id;
} else {
// Note: do not update the due date
charge.subscription_interval =
Some(subscription.interval);
charge.price_id =
metadata.product_price_item.id;
charge.amount = new_price as i64;