FEATURE: Implement refunds from dashboard (#27)

An implementation of refunds from the Admin dashboard. To refund, go to Plugins > Subscriptions > Subscriptions then click the `Cancel` button. You'll be presented with a modal. If you wish to refund only the most recent payment, check the box. 

This only implements refunds for Subscriptions, not One Time Payments. One Time Payments will still need to be handled manually at this time.

app/controllers/discourse_subscriptions/admin/subscriptions_controller.rb

@@ -26,7 +26,9 @@ module DiscourseSubscriptions
       end
 
       def destroy
+        params.require(:id)
         begin
+          refund_subscription(params[:id]) if params[:refund]
           subscription = ::Stripe::Subscription.delete(params[:id])
 
           customer = Customer.find_by(
@@ -49,6 +51,18 @@ module DiscourseSubscriptions
           render_json_error e.message
         end
       end
+
+      private
+
+      # this will only refund the most recent subscription payment
+      def refund_subscription(subscription_id)
+        subscription = ::Stripe::Subscription.retrieve(subscription_id)
+        invoice = ::Stripe::Invoice.retrieve(subscription[:latest_invoice]) if subscription[:latest_invoice]
+        payment_intent = invoice[:payment_intent] if invoice[:payment_intent]
+        refund = ::Stripe::Refund.create({
+          payment_intent: payment_intent,
+        })
+      end
     end
   end
 end

assets/javascripts/discourse/controllers/admin-plugins-discourse-subscriptions-subscriptions.js.es6

@@ -1,3 +1,12 @@
 import Controller from "@ember/controller";
+import showModal from "discourse/lib/show-modal";
 
-export default Controller.extend({});
+export default Controller.extend({
+  actions: {
+    showCancelModal(subscription) {
+      showModal("admin-cancel-subscription", {
+        model: subscription,
+      });
+    },
+  },
+});

assets/javascripts/discourse/models/admin-subscription.js.es6

@@ -19,9 +19,13 @@ const AdminSubscription = EmberObject.extend({
     return getURL(`/admin/users/${metadata.user_id}/${metadata.username}`);
   },
 
-  destroy() {
+  destroy(refund) {
+    const data = {
+      refund: refund,
+    };
     return ajax(`/s/admin/subscriptions/${this.id}`, {
       method: "delete",
+      data,
     }).then((result) => AdminSubscription.create(result));
   },
 });

assets/javascripts/discourse/routes/admin-plugins-discourse-subscriptions-subscriptions.js.es6

@@ -1,6 +1,6 @@
+import I18n from "I18n";
 import Route from "@ember/routing/route";
 import AdminSubscription from "discourse/plugins/discourse-subscriptions/discourse/models/admin-subscription";
-import I18n from "I18n";
 
 export default Route.extend({
   model() {
@@ -8,29 +8,24 @@ export default Route.extend({
   },
 
   actions: {
-    cancelSubscription(subscription) {
-      bootbox.confirm(
-        I18n.t(
-          "discourse_subscriptions.user.subscriptions.operations.destroy.confirm"
-        ),
-        I18n.t("no_value"),
-        I18n.t("yes_value"),
-        (confirmed) => {
-          if (confirmed) {
-            subscription.set("loading", true);
-
-            subscription
-              .destroy()
-              .then((result) => subscription.set("status", result.status))
-              .catch((data) =>
-                bootbox.alert(data.jqXHR.responseJSON.errors.join("\n"))
-              )
-              .finally(() => {
-                subscription.set("loading", false);
-              });
-          }
-        }
-      );
+    cancelSubscription(model) {
+      const subscription = model.subscription;
+      const refund = model.refund;
+      subscription.set("loading", true);
+      subscription
+        .destroy(refund)
+        .then((result) => {
+          subscription.set("status", result.status);
+          this.send("closeModal");
+          bootbox.alert(I18n.t("discourse_subscriptions.admin.canceled"));
+        })
+        .catch((data) =>
+          bootbox.alert(data.jqXHR.responseJSON.errors.join("\n"))
+        )
+        .finally(() => {
+          subscription.set("loading", false);
+          this.refresh();
+        });
     },
   },
 });

assets/javascripts/discourse/templates/admin/plugins-discourse-subscriptions-subscriptions.hbs

@@ -34,7 +34,7 @@
           {{#if subscription.loading}}
             {{loading-spinner size="small"}}
           {{else}}
-            {{d-button disabled=subscription.canceled label="cancel" action=(route-action "cancelSubscription" subscription) icon="times"}}
+            {{d-button disabled=subscription.canceled label="cancel" action=(action "showCancelModal" subscription) icon="times"}}
           {{/if}}
         </td>
       </tr>

assets/javascripts/discourse/templates/modal/admin-cancel-subscription.hbs

@@ -0,0 +1,21 @@
+<div>
+  {{#d-modal-body rawTitle=(i18n "discourse_subscriptions.user.subscriptions.operations.destroy.confirm")}}
+    {{input type="checkbox" checked=refund}}
+    {{i18n "discourse_subscriptions.admin.ask_refund"}}
+  {{/d-modal-body}}
+
+
+  <div class="modal-footer">
+    {{#if model.loading}}
+      {{loading-spinner}}
+    {{else}}
+      {{d-button
+        label="yes_value"
+        action=(route-action "cancelSubscription" (hash subscription=model refund=refund))
+        icon="times"
+        class="btn-danger"
+      }}
+      {{d-button label="no_value" action=(route-action "closeModal")}}
+    {{/if}}
+  </div>
+</div>

config/locales/client.en.yml

@@ -148,3 +148,5 @@ en:
             plan: Plan
             status: Status
             created_at: Created
+        ask_refund: Refund the last payment made by the customer?
+        canceled: "The subscription is canceled."

spec/requests/admin/subscriptions_controller_spec.rb

@@ -99,6 +99,21 @@ module DiscourseSubscriptions
             delete "/s/admin/subscriptions/sub_12345.json"
           }.not_to change { user.groups.count }
         end
+
+        it "refunds if params[:refund] present" do
+          ::Stripe::Subscription
+            .expects(:delete)
+            .with('sub_12345')
+            .returns(
+              plan: { product: 'pr_34578' },
+              customer: 'c_123'
+            )
+          ::Stripe::Subscription.expects(:retrieve).with('sub_12345').returns(latest_invoice: 'in_123')
+          ::Stripe::Invoice.expects(:retrieve).with('in_123').returns(payment_intent: 'pi_123')
+          ::Stripe::Refund.expects(:create).with(payment_intent: 'pi_123')
+
+          delete "/s/admin/subscriptions/sub_12345.json", params: { refund: true }
+        end
       end
     end
   end