feat(coupons): add lifecycle webhooks

coupon.created/updated/deleted webhook event names already existed
(added for activity logs), but nothing ever fired them -- sibling
catalog resources Plan/BillableMetric/Feature all fire webhooks on
create/update/destroy, Coupon didn't.

Adds Webhooks::Coupons::{Created,Updated,Deleted}Service mirroring
the existing BillableMetrics webhook services, registers them in
SendWebhookJob::WEBHOOK_SERVICES, and wires the SendWebhookJob calls
into Coupons::{Create,Update,Destroy}Service.

Author: avanish-garg

app/jobs/send_webhook_job.rb

@@ -21,6 +21,9 @@ class SendWebhookJob < ApplicationJob
     "billable_metric.created" => Webhooks::BillableMetrics::CreatedService,
     "billable_metric.updated" => Webhooks::BillableMetrics::UpdatedService,
     "billable_metric.deleted" => Webhooks::BillableMetrics::DeletedService,
+    "coupon.created" => Webhooks::Coupons::CreatedService,
+    "coupon.updated" => Webhooks::Coupons::UpdatedService,
+    "coupon.deleted" => Webhooks::Coupons::DeletedService,
     "dunning_campaign.finished" => Webhooks::DunningCampaigns::FinishedService,
     "invoice.created" => Webhooks::Invoices::CreatedService,
     "invoice.one_off_created" => Webhooks::Invoices::OneOffCreatedService,

app/services/coupons/create_service.rb

@@ -63,6 +63,7 @@ def call
       end
 
       result.coupon = coupon
+      SendWebhookJob.perform_after_commit("coupon.created", coupon)
       result
     rescue ActiveRecord::RecordInvalid => e
       result.record_validation_failure!(record: e.record)

app/services/coupons/destroy_service.rb

@@ -27,6 +27,7 @@ def call
       end
 
       result.coupon = coupon
+      SendWebhookJob.perform_after_commit("coupon.deleted", coupon)
       result
     end
 

app/services/coupons/update_service.rb

@@ -71,6 +71,7 @@ def call
       end
 
       result.coupon = coupon
+      SendWebhookJob.perform_after_commit("coupon.updated", coupon)
       result
     rescue ActiveRecord::RecordInvalid => e
       result.record_validation_failure!(record: e.record)

app/services/webhooks/coupons/created_service.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+module Webhooks
+  module Coupons
+    class CreatedService < Webhooks::BaseService
+      private
+
+      def object_serializer
+        ::V1::CouponSerializer.new(
+          object,
+          root_name: "coupon"
+        )
+      end
+
+      def webhook_type
+        "coupon.created"
+      end
+
+      def object_type
+        "coupon"
+      end
+    end
+  end
+end

app/services/webhooks/coupons/deleted_service.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+module Webhooks
+  module Coupons
+    class DeletedService < Webhooks::BaseService
+      private
+
+      def object_serializer
+        ::V1::CouponSerializer.new(
+          object,
+          root_name: "coupon"
+        )
+      end
+
+      def webhook_type
+        "coupon.deleted"
+      end
+
+      def object_type
+        "coupon"
+      end
+    end
+  end
+end

app/services/webhooks/coupons/updated_service.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+module Webhooks
+  module Coupons
+    class UpdatedService < Webhooks::BaseService
+      private
+
+      def object_serializer
+        ::V1::CouponSerializer.new(
+          object,
+          root_name: "coupon"
+        )
+      end
+
+      def webhook_type
+        "coupon.updated"
+      end
+
+      def object_type
+        "coupon"
+      end
+    end
+  end
+end

spec/jobs/send_webhook_job_spec.rb

@@ -741,6 +741,22 @@
         Webhooks::BillableMetrics::DeletedService
     end
 
+    context "with coupon webhooks" do
+      let(:object) { create(:coupon, organization:) }
+
+      it_behaves_like "a webhook service",
+        "coupon.created",
+        Webhooks::Coupons::CreatedService
+
+      it_behaves_like "a webhook service",
+        "coupon.updated",
+        Webhooks::Coupons::UpdatedService
+
+      it_behaves_like "a webhook service",
+        "coupon.deleted",
+        Webhooks::Coupons::DeletedService
+    end
+
     context "with quote webhooks" do
       let(:object) { create(:quote_version, organization:) }
 

spec/services/coupons/create_service_spec.rb

@@ -38,6 +38,12 @@
       expect(Utils::ActivityLog).to have_produced("coupon.created").after_commit.with(coupon)
     end
 
+    it "enqueues a coupon.created webhook" do
+      result = create_service.call
+
+      expect(SendWebhookJob).to have_been_enqueued.with("coupon.created", result.coupon)
+    end
+
     context "with code already used by a deleted coupon" do
       it "creates an coupon with the same code" do
         create(:coupon, :deleted, organization:, code: coupon_code)

spec/services/coupons/destroy_service_spec.rb

@@ -35,6 +35,12 @@
       expect(Utils::ActivityLog).to have_produced("coupon.deleted").after_commit.with(coupon)
     end
 
+    it "enqueues a coupon.deleted webhook" do
+      result = destroy_service.call
+
+      expect(SendWebhookJob).to have_been_enqueued.with("coupon.deleted", result.coupon)
+    end
+
     context "with applied coupons" do
       it "terminates applied coupons" do
         applied_coupon = create(:applied_coupon, coupon:)