From fa640a5d4315397ffe83242dd0d8a175656f82e2 Mon Sep 17 00:00:00 2001
From: Enrico Prazeres <esprazj.dev@gmail.com>
Date: Wed, 11 Feb 2026 18:35:15 +0000
Subject: [PATCH] feat: handle callback

---
 lib/pearl/billing.ex                          | 12 +++++
 lib/pearl_web/controllers/midas_controller.ex | 46 +++++++++++++++----
 .../live/checkout/payment_status_live.ex      | 16 ++++++-
 3 files changed, 63 insertions(+), 11 deletions(-)

diff --git a/lib/pearl/billing.ex b/lib/pearl/billing.ex
index 225b723a..30ca76cf 100644
--- a/lib/pearl/billing.ex
+++ b/lib/pearl/billing.ex
@@ -263,6 +263,18 @@ defmodule Pearl.Billing do
     |> broadcast_payment_order_update()
   end
 
+  def mark_payment_cancelled(order_id) do
+    payment = get_payment_by_order_id!(order_id)
+
+    case delete_payment(payment) do
+      {:ok, deleted_payment} ->
+        broadcast_payment_order_update({:ok, %{deleted_payment | status: :canceled}})
+
+      {:error, changeset} ->
+        {:error, changeset}
+    end
+  end
+
   def subscribe_to_payment_order_updates(order_id) do
     Phoenix.PubSub.subscribe(@pubsub, "payment_order:#{order_id}")
   end
diff --git a/lib/pearl_web/controllers/midas_controller.ex b/lib/pearl_web/controllers/midas_controller.ex
index 98e6e59f..81576b0b 100644
--- a/lib/pearl_web/controllers/midas_controller.ex
+++ b/lib/pearl_web/controllers/midas_controller.ex
@@ -5,23 +5,49 @@ defmodule PearlWeb.MidasController do
   @doc """
   Handle Midas payment webhook.
   """
-  def handle_webhook(conn, %{"pearl_api_key" => pearl_api_key, "order_id" => order_id} = _params) do
+  def handle_webhook(
+        conn,
+        %{"pearl_api_key" => pearl_api_key, "order_id" => order_id, "status" => status} = _params
+      ) do
     if pearl_api_key == Application.fetch_env!(:pearl, Pearl.Billing)[:pearl_api_key] do
       payment = Billing.get_payment_by_order_id(order_id)
 
-      if payment && payment.status != :completed do
-        case Billing.mark_payment_completed(order_id) do
-          {:error, reason} ->
-            send_resp(conn, 400, "error: #{inspect(reason)}")
-
-          _ ->
-            send_resp(conn, 200, "success")
+      if payment do
+        case status do
+          :completed -> handle_completed_payment(conn, payment, order_id)
+          _ -> handle_cancelled_payment(conn, payment, order_id)
         end
-      else
-        send_resp(conn, 404, "payment not found")
       end
     else
       send_resp(conn, 403, "invalid api key")
     end
   end
+
+  defp handle_completed_payment(conn, payment, order_id) do
+    if payment.status != :completed do
+      case Billing.mark_payment_completed(order_id) do
+        {:error, reason} ->
+          send_resp(conn, 400, "error: #{inspect(reason)}")
+
+        _ ->
+          send_resp(conn, 200, "success")
+      end
+    else
+      send_resp(conn, 404, "payment not found")
+    end
+  end
+
+  defp handle_cancelled_payment(conn, payment, order_id) do
+    if payment.status != :completed do
+      case Billing.mark_payment_cancelled(order_id) do
+        {:error, reason} ->
+          send_resp(conn, 400, "error: #{inspect(reason)}")
+
+        _ ->
+          send_resp(conn, 200, "success")
+      end
+    else
+      send_resp(conn, 404, "payment not found")
+    end
+  end
 end
diff --git a/lib/pearl_web/live/checkout/payment_status_live.ex b/lib/pearl_web/live/checkout/payment_status_live.ex
index 59ee3062..3cf893a0 100644
--- a/lib/pearl_web/live/checkout/payment_status_live.ex
+++ b/lib/pearl_web/live/checkout/payment_status_live.ex
@@ -19,10 +19,24 @@ defmodule PearlWeb.Checkout.PaymentStatusLive do
   end
 
   @impl true
-  def handle_info({:payment_order_updated, payment}, socket) do
+  def handle_info({:payment_order_updated, %{status: :completed} = payment}, socket) do
     {:noreply,
      socket
      |> assign(payment: payment)
      |> put_flash(:info, "Pagamento confirmado com sucesso.")}
   end
+
+  @impl true
+  def handle_info({:payment_order_updated, %{status: :canceled} = payment}, socket) do
+    {:noreply,
+     socket
+     |> assign(payment: payment)
+     |> put_flash(:error, "Pagamento cancelado.")
+     |> push_navigate(to: ~p"/checkout/payment")}
+  end
+
+  @impl true
+  def handle_info({:payment_order_updated, payment}, socket) do
+    {:noreply, assign(socket, payment: payment)}
+  end
 end