From c8d418acddd72e628caad9a6b11ff6debd3386e9 Mon Sep 17 00:00:00 2001
From: csaurus <csaurus@mailbox.org>
Date: Thu, 10 May 2018 22:17:33 -0400
Subject: [PATCH] api/v1/timelines/direct implementation

---
 lib/pleroma/web/activity_pub/activity_pub.ex  | 23 +++++++++++++++++++
 .../mastodon_api/mastodon_api_controller.ex   |  9 ++++++++
 lib/pleroma/web/router.ex                     |  2 ++
 3 files changed, 34 insertions(+)

diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
index 8c1ba1ea3..d5d00d4a2 100644
--- a/lib/pleroma/web/activity_pub/activity_pub.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
@@ -224,6 +224,28 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     |> Enum.reverse()
   end
 
+  @valid_visibilities ~w[direct unlisted public private]
+
+  defp restrict_visibility(query, %{visibility: "direct"}) do
+    public = "https://www.w3.org/ns/activitystreams#Public"
+
+    from(
+      activity in query,
+      join: sender in User,
+      on: sender.ap_id == activity.actor,
+      where:
+        fragment("not data->'to' \\? ?", ^public) and fragment("not data->'cc' \\? ?", ^public) and
+          fragment("not data->'to' \\? ?", sender.follower_address)
+    )
+  end
+
+  defp restrict_visibility(_query, %{visibility: visibility})
+       when visibility not in @valid_visibilities do
+    Logger.error("Could not restrict visibility to #{visibility}")
+  end
+
+  defp restrict_visibility(query, _visibility), do: query
+
   defp restrict_since(query, %{"since_id" => since_id}) do
     from(activity in query, where: activity.id > ^since_id)
   end
@@ -347,6 +369,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     |> restrict_recent(opts)
     |> restrict_blocked(opts)
     |> restrict_media(opts)
+    |> restrict_visibility(opts)
   end
 
   def fetch_activities(recipients, opts \\ %{}) do
diff --git a/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex b/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
index 9f4261143..d190cdc3f 100644
--- a/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
+++ b/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
@@ -227,6 +227,15 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
     end
   end
 
+  def dm_timeline(%{assigns: %{user: user}} = conn, params) do
+    query = ActivityPub.fetch_activities_query([user.ap_id], %{visibility: "direct"})
+    activities = Repo.all(query)
+
+    conn
+    |> add_link_headers(:user_statuses, activities, user.ap_id)
+    |> render(StatusView, "index.json", %{activities: activities, for: user, as: :activity})
+  end
+
   def get_status(%{assigns: %{user: user}} = conn, %{"id" => id}) do
     with %Activity{} = activity <- Repo.get(Activity, id),
          true <- ActivityPub.visible_for_user?(activity, user) do
diff --git a/lib/pleroma/web/router.ex b/lib/pleroma/web/router.ex
index c025dea33..dbef19d44 100644
--- a/lib/pleroma/web/router.ex
+++ b/lib/pleroma/web/router.ex
@@ -106,6 +106,8 @@ defmodule Pleroma.Web.Router do
 
     get("/timelines/home", MastodonAPIController, :home_timeline)
 
+    get("/timelines/direct", MastodonAPIController, :dm_timeline)
+
     get("/favourites", MastodonAPIController, :favourites)
 
     post("/statuses", MastodonAPIController, :post_status)