Track seconds between invitation sent, flow start, and completion

This commit adds metadata tracking for the seconds in two intervals:
1. invitation sent and flow start, and
2. flow start and flow completion

Although, these can be reconstituted later from the database timestamps,
it might be best to just send them to NewRelic so we can put them on a
dashboard easily.

app/app/controllers/cbv/base_controller.rb

@@ -24,7 +24,8 @@ def set_cbv_flow
         timestamp: Time.now.to_i,
         invitation_id: invitation.id,
         cbv_flow_id: @cbv_flow.id,
-        site_id: @cbv_flow.site_id
+        site_id: @cbv_flow.site_id,
+        seconds_since_invitation: (Time.now - invitation.created_at).to_i
       })
 
       if @cbv_flow.pinwheel_accounts.any?

app/app/controllers/cbv/summaries_controller.rb

@@ -85,7 +85,8 @@ def track_transmitted_event(cbv_flow, payments)
       account_count: payments.map { |p| p[:account_id] }.uniq.count,
       paystub_count: payments.count,
       account_count_with_additional_information:
-        cbv_flow.additional_information.values.count { |info| info["comment"].present? }
+        cbv_flow.additional_information.values.count { |info| info["comment"].present? },
+      flow_started_seconds_ago: (Time.now - cbv_flow.created_at).to_i
     })
   rescue => ex
     Rails.logger.error "Failed to track NewRelic event: #{ex.message}"

app/spec/controllers/cbv/entries_controller_spec.rb

@@ -11,7 +11,18 @@
     end
 
     context "when following a link from a flow invitation" do
-      let(:invitation) { create(:cbv_flow_invitation, case_number: "ABC1234") }
+      let(:seconds_since_invitation) { 300 }
+      let(:invitation) do
+        create(
+          :cbv_flow_invitation,
+          case_number: "ABC1234",
+          created_at: seconds_since_invitation.seconds.ago
+        )
+      end
+
+      around do |ex|
+        Timecop.freeze(&ex)
+      end
 
       it "renders properly" do
         get :show, params: { token: invitation.auth_token }
@@ -32,6 +43,21 @@
         )
       end
 
+      it "sends a NewRelic event with metadata" do
+        allow(NewRelicEventTracker).to receive(:track)
+
+        get :show, params: { token: invitation.auth_token }
+        cbv_flow = CbvFlow.find(session[:cbv_flow_id])
+
+        expect(NewRelicEventTracker).to have_received(:track).with("ClickedCBVInvitationLink", {
+          timestamp: be_a(Integer),
+          invitation_id: invitation.id,
+          cbv_flow_id: cbv_flow.id,
+          site_id: invitation.site_id,
+          seconds_since_invitation: seconds_since_invitation
+        })
+      end
+
       context "when returning to an already-visited flow invitation" do
         let(:existing_cbv_flow) { create(:cbv_flow, cbv_flow_invitation: invitation) }
 

app/spec/controllers/cbv/summaries_controller_spec.rb

@@ -3,13 +3,20 @@
 RSpec.describe Cbv::SummariesController do
   include PinwheelApiHelper
 
-  let(:cbv_flow) { create(:cbv_flow, case_number: "ABC1234", pinwheel_token_id: "abc-def-ghi") }
+  let(:flow_started_seconds_ago) { 300 }
+  let(:cbv_flow) do
+    create(:cbv_flow, case_number: "ABC1234", pinwheel_token_id: "abc-def-ghi", created_at: flow_started_seconds_ago.seconds.ago)
+  end
   let(:cbv_flow_invitation) { cbv_flow.cbv_flow_invitation }
 
   before do
     session[:cbv_flow_invitation] = cbv_flow_invitation
   end
 
+  around do |ex|
+    Timecop.freeze(&ex)
+  end
+
   describe "#show" do
     before do
       cbv_flow_invitation.update(snap_application_date: Date.parse('2024-06-18'))
@@ -150,7 +157,8 @@
           cbv_flow_id: cbv_flow.id,
           account_count: 1,
           paystub_count: 1,
-          account_count_with_additional_information: 0
+          account_count_with_additional_information: 0,
+          flow_started_seconds_ago: flow_started_seconds_ago
         })
       end
     end