Add resume patronage feature

.dynamic/client/patron.html

@@ -81,7 +81,7 @@
       const planId = '${planId}'
       const itemId = '${itemId}'
       const currentAmount = ${patronageAmount}
-      const isPaused = '${isPaused}'
+      const isPaused = ${isPaused}
 
       console.log('isPaused', isPaused)
 

.dynamic/client/patron.js

@@ -23,6 +23,7 @@ window.addEventListener('load', _ => {
     }
 
     switch (response.for) {
+
       case 'update':
         $('#updateButton').value = 'Update my patronage'
         $('#updateButton').disabled = false
@@ -46,8 +47,19 @@ window.addEventListener('load', _ => {
           'success'
         )
       break
-    }
 
+      case 'resume':
+        $('#resume-your-patronage').hidden = true
+        $('#resumeButton').value = 'Resume my patronage'
+        $('#resumeButton').disabled = false
+        $('#pause-your-patronage').hidden = false
+        Modal.fire(
+          'Patronage resumed',
+          `Your patronage has been resumed effective immediately. You can pause it again at any time. Thank you for supporting us.`,
+          'success'
+        )
+      break
+    }
   }
 
   //
@@ -85,6 +97,16 @@ window.addEventListener('load', _ => {
         $('#updateButton').disabled = true
       }
 
+      if (commandName === 'pause') {
+        $('#pauseButton').value = 'Pausing…'
+        $('#pauseButton').disabled = true
+      }
+
+      if (commandName === 'resume') {
+        $('#resumeButton').value = 'Resuming…'
+        $('#resumeButton').disabled = true
+      }
+
       let proceed = true
       if (commandName === 'cancel') proceed = await confirmCancellation()
 
@@ -96,6 +118,6 @@ window.addEventListener('load', _ => {
 
   handleCommand('update')
   handleCommand('pause')
+  handleCommand('resume')
   handleCommand('cancel')
-
 })

.dynamic/https/get/patron.js

@@ -63,7 +63,7 @@ module.exports = async (request, response, next) => {
 
   const patronageAmount = subscription.quantity
 
-  const isPaused = subscription.discount !== undefined
+  const isPaused = subscription.discount !== null
 
   // Newly-created?
   let newPatronMessage = ''

.dynamic/wss/patron.js

@@ -10,38 +10,64 @@ module.exports = (webSocket, request) => {
     let result
 
     switch (command.action) {
+
       case 'update':
         // Update the patronage amount, starting with the next payment (not prorated).
         try {
-          result = await stripe.subscriptions.update(command.subscriptionId, {
-            prorate: false,
-            items: [{
-              id: command.itemId,
-              plan: command.planId,
-              quantity: command.amount
-            }]
-          })
+          result = await stripe.subscriptions.update(
+            command.subscriptionId,
+            {
+              prorate: false,
+              items: [
+                {
+                  id: command.itemId,
+                  plan: command.planId,
+                  quantity: command.amount
+               }
+              ]
+            }
+          )
         } catch (error) {
           webSocket.send(JSON.stringify({for: command.action, error}))
         }
         webSocket.send(JSON.stringify({for: command.action, amount: result.quantity}))
-        break;
+      break;
+
       case 'pause':
+        // Pausing a subscription is not a native concept within the Stripe API. Instead, we implement
+        // one of the recommended strategies for obtaining that outcome by applying a 100% discount coupon.
         try {
-          result = await stripe.subscriptions.update(command.subscriptionId, {
-            prorate: false,
-            coupon: 'VKQ30S0b'
-          })
+          result = await stripe.subscriptions.update(
+            command.subscriptionId,
+            {
+              prorate: false,
+              coupon: 'VKQ30S0b'
+            }
+          )
         } catch (error) {
           webSocket.send(JSON.stringify({for: command.action, error}))
         }
         webSocket.send(JSON.stringify({for: command.action, coupon: result.coupon}))
-        break;
+      break;
+
+      case 'resume':
+        // A paused subscription (see above) is resumed by deleting the 100% subscription discount.
+        try {
+          result = await stripe.subscriptions.deleteDiscount(command.subscriptionId)
+        } catch (error) {
+          webSocket.send(JSON.stringify({for: command.action, error}))
+        }
+        webSocket.send(JSON.stringify({for: command.action}))
+      break;
+
       case 'cancel':
         console.log('CANCEL')
-        break;
+      break;
+
       default:
-        console.log(`Unknown command received: ${command.action}`)
+        const error = new Error(`Unknown command received: ${command.action}`)
+        console.log(error)
+        webSocket.send(JSON.stringify({for: command.action, error }))
     }
   })
 }