Merge branch 'hakabahitoyo/pleroma-feature/atom-feed-pagination' into develop

lib/pleroma/web/ostatus/feed_representer.ex

@@ -10,6 +10,8 @@ def to_simple_form(user, activities, _users) do
 
     h = fn(str) -> [to_charlist(str)] end
 
+    last_activity = List.last(activities)
+
     entries = activities
     |> Enum.map(fn(activity) ->
       {:entry, ActivityRepresenter.to_simple_form(activity, user)}
@@ -32,7 +34,15 @@ def to_simple_form(user, activities, _users) do
         {:link, [rel: 'salmon', href: h.(OStatus.salmon_path(user))], []},
         {:link, [rel: 'self', href: h.(OStatus.feed_path(user)), type: 'application/atom+xml'], []},
         {:author, UserRepresenter.to_simple_form(user)},
-      ] ++ entries
+      ] ++
+      if last_activity do
+        [{:link, [rel: 'next',
+          href: to_charlist(OStatus.feed_path(user)) ++ '?max_id=' ++ to_charlist(last_activity.id),
+          type: 'application/atom+xml'], []}]
+      else
+        []
+      end
+      ++ entries
     }]
   end
 end

lib/pleroma/web/ostatus/ostatus_controller.ex

@@ -17,7 +17,7 @@ def feed_redirect(conn, %{"nickname" => nickname}) do
     end
   end
 
-  def feed(conn, %{"nickname" => nickname}) do
+  def feed(conn, %{"nickname" => nickname} = params) do
     user = User.get_cached_by_nickname(nickname)
     query = from activity in Activity,
       where: fragment("?->>'actor' = ?", activity.data, ^user.ap_id),
@@ -25,6 +25,7 @@ def feed(conn, %{"nickname" => nickname}) do
       order_by: [desc: :id]
 
     activities = query
+    |> restrict_max(params)
     |> Repo.all
 
     response = user
@@ -54,6 +55,11 @@ defp decode_or_retry(body) do
     end
   end
 
+  defp restrict_max(query, %{"max_id" => max_id}) do
+    from activity in query, where: activity.id < ^max_id
+  end
+  defp restrict_max(query, _), do: query
+
   def salmon_incoming(conn, _) do
     {:ok, body, _conn} = read_body(conn)
     {:ok, doc} = decode_or_retry(body)

test/web/ostatus/feed_representer_test.exs

@@ -33,6 +33,7 @@ test "returns a feed of the last 20 items of the user" do
       <author>
         #{user_xml}
       </author>
+      <link rel="next" href="#{OStatus.feed_path(user)}?max_id=#{note_activity.id}" type="application/atom+xml" />
       <entry>
         #{entry_xml}
       </entry>