From 5dc14c89cecc121ffb047c2a7c972af0b0f89ef8 Mon Sep 17 00:00:00 2001
From: "Haelwenn (lanodan) Monnier" <contact@hacktivis.me>
Date: Fri, 4 Oct 2019 06:47:36 +0200
Subject: [PATCH] =?UTF-8?q?notification=5Fview.ex:=20Make=20sure=20`accoun?=
 =?UTF-8?q?t`=20isn=E2=80=99t=20empty?=
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Related: https://git.pleroma.social/pleroma/pleroma/issues/1203
---
 .../mastodon_api/views/notification_view.ex   | 60 ++++++++++---------
 .../views/notification_view_test.exs          |  6 ++
 2 files changed, 38 insertions(+), 28 deletions(-)

diff --git a/lib/pleroma/web/mastodon_api/views/notification_view.ex b/lib/pleroma/web/mastodon_api/views/notification_view.ex
index 60b58dc90..5e3dbe728 100644
--- a/lib/pleroma/web/mastodon_api/views/notification_view.ex
+++ b/lib/pleroma/web/mastodon_api/views/notification_view.ex
@@ -25,40 +25,44 @@ def render("show.json", %{
     parent_activity = Activity.get_create_by_object_ap_id(activity.data["object"])
     mastodon_type = Activity.mastodon_notification_type(activity)
 
-    response = %{
-      id: to_string(notification.id),
-      type: mastodon_type,
-      created_at: CommonAPI.Utils.to_masto_date(notification.inserted_at),
-      account: AccountView.render("show.json", %{user: actor, for: user}),
-      pleroma: %{
-        is_seen: notification.seen
+    with %{id: _} = account <- AccountView.render("show.json", %{user: actor, for: user}) do
+      response = %{
+        id: to_string(notification.id),
+        type: mastodon_type,
+        created_at: CommonAPI.Utils.to_masto_date(notification.inserted_at),
+        account: account,
+        pleroma: %{
+          is_seen: notification.seen
+        }
       }
-    }
 
-    case mastodon_type do
-      "mention" ->
-        response
-        |> Map.merge(%{
-          status: StatusView.render("show.json", %{activity: activity, for: user})
-        })
+      case mastodon_type do
+        "mention" ->
+          response
+          |> Map.merge(%{
+            status: StatusView.render("show.json", %{activity: activity, for: user})
+          })
 
-      "favourite" ->
-        response
-        |> Map.merge(%{
-          status: StatusView.render("show.json", %{activity: parent_activity, for: user})
-        })
+        "favourite" ->
+          response
+          |> Map.merge(%{
+            status: StatusView.render("show.json", %{activity: parent_activity, for: user})
+          })
 
-      "reblog" ->
-        response
-        |> Map.merge(%{
-          status: StatusView.render("show.json", %{activity: parent_activity, for: user})
-        })
+        "reblog" ->
+          response
+          |> Map.merge(%{
+            status: StatusView.render("show.json", %{activity: parent_activity, for: user})
+          })
 
-      "follow" ->
-        response
+        "follow" ->
+          response
 
-      _ ->
-        nil
+        _ ->
+          nil
+      end
+    else
+      _ -> nil
     end
   end
 end
diff --git a/test/web/mastodon_api/views/notification_view_test.exs b/test/web/mastodon_api/views/notification_view_test.exs
index 81ab82e2b..c9043a69a 100644
--- a/test/web/mastodon_api/views/notification_view_test.exs
+++ b/test/web/mastodon_api/views/notification_view_test.exs
@@ -100,5 +100,11 @@ test "Follow notification" do
       NotificationView.render("index.json", %{notifications: [notification], for: followed})
 
     assert [expected] == result
+
+    User.perform(:delete, follower)
+    notification = Notification |> Repo.one() |> Repo.preload(:activity)
+
+    assert [] ==
+             NotificationView.render("index.json", %{notifications: [notification], for: followed})
   end
 end