Add fetching for recipients.

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -8,14 +8,26 @@ def insert(map) when is_map(map) do
   end
 
   def fetch_public_activities(opts \\ %{}) do
+    public = ["https://www.w3.org/ns/activitystreams#Public"]
+    fetch_activities(public, opts)
+  end
+
+  def fetch_activities(recipients, opts \\ %{}) do
     since_id = opts["since_id"] || 0
 
     query = from activity in Activity,
-      where: fragment(~s(? @> '{"to": ["https://www.w3.org/ns/activitystreams#Public"]}'), activity.data),
-      where: activity.id > ^since_id,
       limit: 20,
       order_by: [desc: :inserted_at]
 
+    query = Enum.reduce(recipients, query, fn (recipient, q) ->
+      map = %{ to: [recipient] }
+      from activity in q,
+      or_where: fragment(~s(? @> ?), activity.data, ^map)
+    end)
+
+    query = from activity in query,
+      where: activity.id > ^since_id
+
     Repo.all(query)
     |> Enum.reverse
   end

lib/pleroma/web/router.ex

@@ -22,6 +22,7 @@ def user_fetcher(username) do
   scope "/api", Pleroma.Web do
     pipe_through :api
     get "/statuses/public_timeline.json", TwitterAPI.Controller, :public_timeline
+    get "/statuses/public_and_external_timeline.json", TwitterAPI.Controller, :public_timeline
   end
 
   scope "/api", Pleroma.Web do

test/web/activity_pub/activity_pub_test.exs

@@ -15,6 +15,19 @@ test "inserts a given map into the activity database" do
     end
   end
 
+
+  describe "fetch activities for recipients" do
+    test "retrieve the activities for certain recipients" do
+      {:ok, activity_one} = ActivityBuilder.insert(%{"to" => ["someone"]})
+      {:ok, activity_two} = ActivityBuilder.insert(%{"to" => ["someone_else"]})
+      {:ok, activity_three} = ActivityBuilder.insert(%{"to" => ["noone"]})
+
+      activities = ActivityPub.fetch_activities(["someone", "someone_else"])
+      assert length(activities) == 2
+      assert activities == [activity_one, activity_two]
+    end
+  end
+
   describe "public fetch activities" do
     test "retrieves public activities" do
       %{public: public} = ActivityBuilder.public_and_non_public