1 files changed, 68 insertions, 10 deletions
diff --git a/lib/pleroma/web/activity_pub/utils.ex b/lib/pleroma/web/activity_pub/utils.ex
index 88f4779c8..182f9cacb 100644
--- a/lib/pleroma/web/activity_pub/utils.ex
+++ b/lib/pleroma/web/activity_pub/utils.ex
@@ -3,16 +3,17 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ActivityPub.Utils do
-  alias Pleroma.Repo
-  alias Pleroma.Web
-  alias Pleroma.Object
+  alias Ecto.Changeset
+  alias Ecto.UUID
   alias Pleroma.Activity
-  alias Pleroma.User
   alias Pleroma.Notification
-  alias Pleroma.Web.Router.Helpers
+  alias Pleroma.Object
+  alias Pleroma.Repo
+  alias Pleroma.User
+  alias Pleroma.Web
+  alias Pleroma.Web.ActivityPub.Visibility
   alias Pleroma.Web.Endpoint
-  alias Ecto.Changeset
-  alias Ecto.UUID
+  alias Pleroma.Web.Router.Helpers
 
   import Ecto.Query
 
@@ -274,13 +275,31 @@ defmodule Pleroma.Web.ActivityPub.Utils do
     Repo.all(query)
   end
 
-  def make_like_data(%User{ap_id: ap_id} = actor, %{data: %{"id" => id}} = object, activity_id) do
+  def make_like_data(
+        %User{ap_id: ap_id} = actor,
+        %{data: %{"actor" => object_actor_id, "id" => id}} = object,
+        activity_id
+      ) do
+    object_actor = User.get_cached_by_ap_id(object_actor_id)
+
+    to =
+      if Visibility.is_public?(object) do
+        [actor.follower_address, object.data["actor"]]
+      else
+        [object.data["actor"]]
+      end
+
+    cc =
+      (object.data["to"] ++ (object.data["cc"] || []))
+      |> List.delete(actor.ap_id)
+      |> List.delete(object_actor.follower_address)
+
     data = %{
       "type" => "Like",
       "actor" => ap_id,
       "object" => id,
-      "to" => [actor.follower_address, object.data["actor"]],
-      "cc" => ["https://www.w3.org/ns/activitystreams#Public"],
+      "to" => to,
+      "cc" => cc,
       "context" => object.data["context"]
     }
 
@@ -614,4 +633,43 @@ defmodule Pleroma.Web.ActivityPub.Utils do
     }
     |> Map.merge(additional)
   end
+
+  @doc """
+  Fetches the OrderedCollection/OrderedCollectionPage from `from`, limiting the amount of pages fetched after
+  the first one to `pages_left` pages.
+  If the amount of pages is higher than the collection has, it returns whatever was there.
+  """
+  def fetch_ordered_collection(from, pages_left, acc \\ []) do
+    with {:ok, response} <- Tesla.get(from),
+         {:ok, collection} <- Poison.decode(response.body) do
+      case collection["type"] do
+        "OrderedCollection" ->
+          # If we've encountered the OrderedCollection and not the page,
+          # just call the same function on the page address
+          fetch_ordered_collection(collection["first"], pages_left)
+
+        "OrderedCollectionPage" ->
+          if pages_left > 0 do
+            # There are still more pages
+            if Map.has_key?(collection, "next") do
+              # There are still more pages, go deeper saving what we have into the accumulator
+              fetch_ordered_collection(
+                collection["next"],
+                pages_left - 1,
+                acc ++ collection["orderedItems"]
+              )
+            else
+              # No more pages left, just return whatever we already have
+              acc ++ collection["orderedItems"]
+            end
+          else
+            # Got the amount of pages needed, add them all to the accumulator
+            acc ++ collection["orderedItems"]
+          end
+
+        _ ->
+          {:error, "Not an OrderedCollection or OrderedCollectionPage"}
+      end
+    end
+  end
 end