From b2713357b9410fc43478de4fb271b2920d618956 Mon Sep 17 00:00:00 2001
From: "Haelwenn (lanodan) Monnier" <contact@hacktivis.me>
Date: Fri, 11 Nov 2022 12:02:26 +0100
Subject: [PATCH] Object.Fetcher: Set reachable on successful fetch

---
 lib/pleroma/object/fetcher.ex        |  5 +++++
 test/pleroma/object/fetcher_test.exs | 12 ++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/lib/pleroma/object/fetcher.ex b/lib/pleroma/object/fetcher.ex
index d81fdcf24..a9a9eeeed 100644
--- a/lib/pleroma/object/fetcher.ex
+++ b/lib/pleroma/object/fetcher.ex
@@ -4,6 +4,7 @@
 
 defmodule Pleroma.Object.Fetcher do
   alias Pleroma.HTTP
+  alias Pleroma.Instances
   alias Pleroma.Maps
   alias Pleroma.Object
   alias Pleroma.Object.Containment
@@ -234,6 +235,10 @@ def fetch_and_contain_remote_object_from_id(id) when is_binary(id) do
          {:ok, body} <- get_object(id),
          {:ok, data} <- safe_json_decode(body),
          :ok <- Containment.contain_origin_from_id(id, data) do
+      if not Instances.reachable?(id) do
+        Instances.set_reachable(id)
+      end
+
       {:ok, data}
     else
       {:scheme, _} ->
diff --git a/test/pleroma/object/fetcher_test.exs b/test/pleroma/object/fetcher_test.exs
index 1f97f36f7..51541a42c 100644
--- a/test/pleroma/object/fetcher_test.exs
+++ b/test/pleroma/object/fetcher_test.exs
@@ -6,6 +6,7 @@ defmodule Pleroma.Object.FetcherTest do
   use Pleroma.DataCase
 
   alias Pleroma.Activity
+  alias Pleroma.Instances
   alias Pleroma.Object
   alias Pleroma.Object.Fetcher
 
@@ -159,6 +160,17 @@ test "it does not fetch a spoofed object uploaded on an instance as an attachmen
                  "https://patch.cx/media/03ca3c8b4ac3ddd08bf0f84be7885f2f88de0f709112131a22d83650819e36c2.json"
                )
     end
+
+    test "it resets instance reachability on successful fetch" do
+      id = "http://mastodon.example.org/@admin/99541947525187367"
+      Instances.set_consistently_unreachable(id)
+      refute Instances.reachable?(id)
+
+      {:ok, object} =
+        Fetcher.fetch_object_from_id("http://mastodon.example.org/@admin/99541947525187367")
+
+      assert Instances.reachable?(id)
+    end
   end
 
   describe "implementation quirks" do