Fix subcriptions remaining time disappearing after cancelling (#10761)

* add hasCancelled method for group/user, prevent cancelling a subscription twice

* wip

* paypal: do not cancel a subscription twice

* make sure hasCancelled and hasNotCancelled return a boolean result

website/server/libs/payments/paypal.js

@@ -257,12 +257,18 @@ api.ipn = async function ipnApi (options = {}) {
     'recurring_payment_failed',
     'recurring_payment_expired',
     'subscr_cancel',
-    'subscr_failed'];
+    'subscr_failed',
+  ];
 
   if (ipnAcceptableTypes.indexOf(txn_type) === -1) return;
+
   // @TODO: Should this request billing date?
   let user = await User.findOne({ 'purchased.plan.customerId': recurring_payment_id }).exec();
   if (user) {
+    // If the user has already cancelled the subscription, return
+    // Otherwise the subscription would be cancelled twice resulting in the loss of subscription credits
+    if (user.hasCancelled()) return;
+
     await payments.cancelSubscription({ user, paymentMethod: this.constants.PAYMENT_METHOD });
     return;
   }
@@ -274,6 +280,10 @@ api.ipn = async function ipnApi (options = {}) {
     .exec();
 
   if (group) {
+    // If the group subscription has already been cancelled the subscription, return
+    // Otherwise the subscription would be cancelled twice resulting in the loss of subscription credits
+    if (group.hasCancelled()) return;
+
     await payments.cancelSubscription({ groupId: group._id, paymentMethod: this.constants.PAYMENT_METHOD });
   }
 };

website/server/models/group.js

@@ -1421,7 +1421,12 @@ schema.methods.isSubscribed = function isSubscribed () {
 
 schema.methods.hasNotCancelled = function hasNotCancelled () {
   let plan = this.purchased.plan;
-  return this.isSubscribed() && !plan.dateTerminated;
+  return Boolean(this.isSubscribed() && !plan.dateTerminated);
+};
+
+schema.methods.hasCancelled = function hasNotCancelled () {
+  let plan = this.purchased.plan;
+  return Boolean(this.isSubscribed() && plan.dateTerminated);
 };
 
 schema.methods.updateGroupPlan = async function updateGroupPlan (removingMember) {

website/server/models/user/methods.js

@@ -31,7 +31,12 @@ schema.methods.isSubscribed = function isSubscribed () {
 
 schema.methods.hasNotCancelled = function hasNotCancelled () {
   let plan = this.purchased.plan;
-  return this.isSubscribed() && !plan.dateTerminated;
+  return Boolean(this.isSubscribed() && !plan.dateTerminated);
+};
+
+schema.methods.hasCancelled = function hasCancelled () {
+  let plan = this.purchased.plan;
+  return Boolean(this.isSubscribed() && plan.dateTerminated);
 };
 
 // Get an array of groups ids the user is member of