7 files changed, 44 insertions, 6 deletions
diff --git a/lib/pleroma/notification.ex b/lib/pleroma/notification.ex
index 301cfd134..b5aadfd17 100644
--- a/lib/pleroma/notification.ex
+++ b/lib/pleroma/notification.ex
@@ -80,9 +80,8 @@ defmodule Pleroma.Notification do
   end
 
   def clear(user) do
-    query = from(n in Notification, where: n.user_id == ^user.id)
-
-    Repo.delete_all(query)
+    from(n in Notification, where: n.user_id == ^user.id)
+    |> Repo.delete_all()
   end
 
   def dismiss(%{id: user_id} = _user, id) do
diff --git a/lib/pleroma/object.ex b/lib/pleroma/object.ex
index cc4a2181a..e2b648727 100644
--- a/lib/pleroma/object.ex
+++ b/lib/pleroma/object.ex
@@ -4,7 +4,7 @@
 
 defmodule Pleroma.Object do
   use Ecto.Schema
-  alias Pleroma.{Repo, Object, User, Activity}
+  alias Pleroma.{Repo, Object, User, Activity, ObjectTombstone}
   import Ecto.{Query, Changeset}
 
   schema "objects" do
@@ -66,8 +66,25 @@ defmodule Pleroma.Object do
     Object.change(%Object{}, %{data: %{"id" => context}})
   end
 
+  def make_tombstone(%Object{data: %{"id" => id, "type" => type}}, deleted \\ DateTime.utc_now()) do
+    %ObjectTombstone{
+      id: id,
+      formerType: type,
+      deleted: deleted
+    }
+    |> Map.from_struct()
+  end
+
+  def swap_object_with_tombstone(object) do
+    tombstone = make_tombstone(object)
+
+    object
+    |> Object.change(%{data: tombstone})
+    |> Repo.update()
+  end
+
   def delete(%Object{data: %{"id" => id}} = object) do
-    with Repo.delete(object),
+    with {:ok, _obj} = swap_object_with_tombstone(object),
          Repo.delete_all(Activity.all_non_create_by_object_ap_id_q(id)),
          {:ok, true} <- Cachex.del(:object_cache, "object:#{id}") do
       {:ok, object}
diff --git a/lib/pleroma/object_tombstone.ex b/lib/pleroma/object_tombstone.ex
new file mode 100644
index 000000000..64d836d3e
--- /dev/null
+++ b/lib/pleroma/object_tombstone.ex
@@ -0,0 +1,4 @@
+defmodule Pleroma.ObjectTombstone do
+  @enforce_keys [:id, :formerType, :deleted]
+  defstruct [:id, :formerType, :deleted, type: "Tombstone"]
+end
diff --git a/lib/pleroma/user.ex b/lib/pleroma/user.ex
index 1f930479d..33f5e43fc 100644
--- a/lib/pleroma/user.ex
+++ b/lib/pleroma/user.ex
@@ -197,6 +197,7 @@ defmodule Pleroma.User do
       |> validate_confirmation(:password)
       |> unique_constraint(:email)
       |> unique_constraint(:nickname)
+      |> validate_exclusion(:nickname, Pleroma.Config.get([Pleroma.User, :restricted_nicknames]))
       |> validate_format(:nickname, local_nickname_regex())
       |> validate_format(:email, @email_regex)
       |> validate_length(:bio, max: 1000)
diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
index 188060780..2d4cc9f68 100644
--- a/lib/pleroma/web/activity_pub/activity_pub.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
@@ -503,6 +503,12 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
 
   defp restrict_replies(query, _), do: query
 
+  defp restrict_reblogs(query, %{"exclude_reblogs" => val}) when val == "true" or val == "1" do
+    from(activity in query, where: fragment("?->>'type' != 'Announce'", activity.data))
+  end
+
+  defp restrict_reblogs(query, _), do: query
+
   # Only search through last 100_000 activities by default
   defp restrict_recent(query, %{"whole_db" => true}), do: query
 
@@ -561,6 +567,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     |> restrict_media(opts)
     |> restrict_visibility(opts)
     |> restrict_replies(opts)
+    |> restrict_reblogs(opts)
   end
 
   def fetch_activities(recipients, opts \\ %{}) do
diff --git a/lib/pleroma/web/nodeinfo/nodeinfo_controller.ex b/lib/pleroma/web/nodeinfo/nodeinfo_controller.ex
index 1265d81c5..a992f75f6 100644
--- a/lib/pleroma/web/nodeinfo/nodeinfo_controller.ex
+++ b/lib/pleroma/web/nodeinfo/nodeinfo_controller.ex
@@ -138,7 +138,8 @@ defmodule Pleroma.Web.Nodeinfo.NodeinfoController do
         },
         accountActivationRequired: Keyword.get(instance, :account_activation_required, false),
         invitesEnabled: Keyword.get(instance, :invites_enabled, false),
-        features: features
+        features: features,
+        restrictedNicknames: Pleroma.Config.get([Pleroma.User, :restricted_nicknames])
       }
     }
 
diff --git a/lib/pleroma/web/twitter_api/twitter_api_controller.ex b/lib/pleroma/web/twitter_api/twitter_api_controller.ex
index c25cb0876..7ae850d71 100644
--- a/lib/pleroma/web/twitter_api/twitter_api_controller.ex
+++ b/lib/pleroma/web/twitter_api/twitter_api_controller.ex
@@ -130,6 +130,15 @@ defmodule Pleroma.Web.TwitterAPI.Controller do
   def user_timeline(%{assigns: %{user: user}} = conn, params) do
     case TwitterAPI.get_user(user, params) do
       {:ok, target_user} ->
+        # Twitter and ActivityPub use a different name and sense for this parameter.
+        {include_rts, params} = Map.pop(params, "include_rts")
+
+        params =
+          case include_rts do
+            x when x == "false" or x == "0" -> Map.put(params, "exclude_reblogs", "true")
+            _ -> params
+          end
+
         activities = ActivityPub.fetch_user_activities(target_user, user, params)
 
         conn