fix(members): parse heartbeat as Date on arrival notification

lib/models/member.js

@@ -225,7 +225,7 @@ export async function heartbeatMembers(memberIds, referenceDate) {
       {$set: {'profile.heartbeat': referenceDate.toISOString()}}
     )
 
-    notifyUserBalanceDepletionOnArrival(updatedUser.value, referenceDate.toISOString().slice(0, 10))
+    notifyUserBalanceDepletionOnArrival(updatedUser.value, referenceDate)
   }))
 }
 
@@ -322,12 +322,14 @@ export async function computeMemberFromUser(user, options = {}) {
  * and has no more tickets
  * and has no ongoing subscription
  */
-async function notifyUserBalanceDepletionOnArrival(user, referenceDate) {
-  const isArriving = !isSameDay(new Date(user.profile.heartbeat), referenceDate)
+async function notifyUserBalanceDepletionOnArrival(user, newHeartbeat) {
+  const previousHeartbeat = new Date(user.profile.heartbeat)
+  const isArriving = !isSameDay(previousHeartbeat, newHeartbeat)
   const isBalanceDepleted = user.profile.balance <= 0
   if (isArriving && isBalanceDepleted) {
     // Check if there is a ongoing subscription
-    const isSubscriptionOngoing = isPresenceDuringAbo(referenceDate, user.profile.abos)
+    const newHeartbeatDate = newHeartbeat.toISOString().slice(0, 10)
+    const isSubscriptionOngoing = isPresenceDuringAbo(newHeartbeatDate, user.profile.abos)
 
     if (!isSubscriptionOngoing) {
       // Send a notification email