X-Git-Url: http://git.squeep.com/?a=blobdiff_plain;ds=sidebyside;f=lib%2Fpleroma%2Fweb%2Factivity_pub%2Fpublisher.ex;h=0bbe6ee805fdd6b613b2dcf4bb518a9437de7784;hb=b70e659304ba35f7afc598c3d3d1b96fa16f6cdf;hp=18145e45f8c0c39e8b47bca8448727bb7a9fdb52;hpb=ffb4eb9779ddd28ecee84c06e8dc58f4a4daaa38;p=akkoma

diff --git a/lib/pleroma/web/activity_pub/publisher.ex b/lib/pleroma/web/activity_pub/publisher.ex
index 18145e45f..0bbe6ee80 100644
--- a/lib/pleroma/web/activity_pub/publisher.ex
+++ b/lib/pleroma/web/activity_pub/publisher.ex
@@ -87,8 +87,13 @@ defmodule Pleroma.Web.ActivityPub.Publisher do
     if public do
       true
     else
-      inbox_info = URI.parse(inbox)
-      !Enum.member?(Config.get([:instance, :quarantined_instances], []), inbox_info.host)
+      %{host: host} = URI.parse(inbox)
+
+      quarantined_instances =
+        Config.get([:instance, :quarantined_instances], [])
+        |> Pleroma.Web.ActivityPub.MRF.subdomains_regex()
+
+      !Pleroma.Web.ActivityPub.MRF.subdomain_match?(quarantined_instances, host)
     end
   end
 
@@ -112,6 +117,45 @@ defmodule Pleroma.Web.ActivityPub.Publisher do
     |> Enum.map(& &1.ap_id)
   end
 
+  @as_public "https://www.w3.org/ns/activitystreams#Public"
+
+  defp maybe_use_sharedinbox(%User{info: %{source_data: data}}),
+    do: (is_map(data["endpoints"]) && Map.get(data["endpoints"], "sharedInbox")) || data["inbox"]
+
+  @doc """
+  Determine a user inbox to use based on heuristics.  These heuristics
+  are based on an approximation of the ``sharedInbox`` rules in the
+  [ActivityPub specification][ap-sharedinbox].
+
+  Please do not edit this function (or its children) without reading
+  the spec, as editing the code is likely to introduce some breakage
+  without some familiarity.
+
+     [ap-sharedinbox]: https://www.w3.org/TR/activitypub/#shared-inbox-delivery
+  """
+  def determine_inbox(
+        %Activity{data: activity_data},
+        %User{info: %{source_data: data}} = user
+      ) do
+    to = activity_data["to"] || []
+    cc = activity_data["cc"] || []
+    type = activity_data["type"]
+
+    cond do
+      type == "Delete" ->
+        maybe_use_sharedinbox(user)
+
+      @as_public in to || @as_public in cc ->
+        maybe_use_sharedinbox(user)
+
+      length(to) + length(cc) > 1 ->
+        maybe_use_sharedinbox(user)
+
+      true ->
+        data["inbox"]
+    end
+  end
+
   @doc """
   Publishes an activity with BCC to all relevant peers.
   """
@@ -131,7 +175,7 @@ defmodule Pleroma.Web.ActivityPub.Publisher do
       %User{ap_id: ap_id} =
         Enum.find(recipients, fn %{info: %{source_data: data}} -> data["inbox"] == inbox end)
 
-      # Get all the recipients on the same host and add them to cc. Otherwise it a remote
+      # Get all the recipients on the same host and add them to cc. Otherwise, a remote
       # instance would only accept a first message for the first recipient and ignore the rest.
       cc = get_cc_ap_ids(ap_id, recipients)
 
@@ -166,8 +210,8 @@ defmodule Pleroma.Web.ActivityPub.Publisher do
 
     recipients(actor, activity)
     |> Enum.filter(fn user -> User.ap_enabled?(user) end)
-    |> Enum.map(fn %{info: %{source_data: data}} ->
-      (is_map(data["endpoints"]) && Map.get(data["endpoints"], "sharedInbox")) || data["inbox"]
+    |> Enum.map(fn %User{} = user ->
+      determine_inbox(activity, user)
     end)
     |> Enum.uniq()
     |> Enum.filter(fn inbox -> should_federate?(inbox, public) end)