Add announcements / retweets to TwAPI.

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -63,7 +63,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     end)
   end
 
-  def unlike(%User{ap_id: ap_id} = user, %Object{data: %{ "id" => id}} = object) do
+  def unlike(%User{ap_id: ap_id}, %Object{data: %{ "id" => id}} = object) do
     query = from activity in Activity,
       where: fragment("? @> ?", activity.data, ^%{actor: ap_id, object: id, type: "Like"})
 

lib/pleroma/web/twitter_api/representers/activity_representer.ex

@@ -4,6 +4,32 @@ defmodule Pleroma.Web.TwitterAPI.Representers.ActivityRepresenter do
   alias Pleroma.Activity
 
 
+  defp user_by_ap_id(user_list, ap_id) do
+    Enum.find(user_list, fn (%{ap_id: user_id}) -> ap_id == user_id end)
+  end
+
+  def to_map(%Activity{data: %{"type" => "Announce", "actor" => actor}} = activity, %{users: users, announced_activity: announced_activity} = opts) do
+    user = user_by_ap_id(users, actor)
+    created_at = get_in(activity.data, ["published"])
+    |> date_to_asctime
+
+    text = "#{user.nickname} retweeted a status."
+
+    announced_user = user_by_ap_id(users, announced_activity.data["actor"])
+    retweeted_status = to_map(announced_activity, Map.merge(%{user: announced_user}, opts))
+    %{
+      "id" => activity.id,
+      "user" => UserRepresenter.to_map(user, opts),
+      "statusnet_html" => text,
+      "text" => text,
+      "is_local" => true,
+      "is_post_verb" => false,
+      "uri" => "tag:#{activity.data["id"]}:objectType=note",
+      "created_at" => created_at,
+      "retweeted_status" => retweeted_status
+    }
+  end
+
   def to_map(%Activity{data: %{"type" => "Like"}} = activity, %{user: user, liked_activity: liked_activity} = opts) do
     created_at = get_in(activity.data, ["published"])
     |> date_to_asctime
@@ -45,7 +71,9 @@ defmodule Pleroma.Web.TwitterAPI.Representers.ActivityRepresenter do
     created_at = get_in(activity.data, ["object", "published"])
     |> date_to_asctime
     like_count = get_in(activity.data, ["object", "like_count"]) || 0
+    announcement_count = get_in(activity.data, ["object", "announcement_count"]) || 0
     favorited = opts[:for] && opts[:for].ap_id in (activity.data["object"]["likes"] || [])
+    repeated = opts[:for] && opts[:for].ap_id in (activity.data["object"]["announcements"] || [])
 
     mentions = opts[:mentioned] || []
 
@@ -68,7 +96,9 @@ defmodule Pleroma.Web.TwitterAPI.Representers.ActivityRepresenter do
       "attachments" => (activity.data["object"]["attachment"] || []) |> ObjectRepresenter.enum_to_list(opts),
       "attentions" => attentions,
       "fave_num" => like_count,
-      "favorited" => !!favorited
+      "repeat_num" => announcement_count,
+      "favorited" => !!favorited,
+      "repeated" => !!repeated,
     }
   end
 

lib/pleroma/web/twitter_api/twitter_api.ex

@@ -150,6 +150,19 @@ defmodule Pleroma.Web.TwitterAPI.TwitterAPI do
     {:ok, status}
   end
 
+  def retweet(%User{} = user, %Activity{data: %{"object" => object}} = activity) do
+    object = Object.get_by_ap_id(object["id"])
+
+    {:ok, _announce_activity, object} = ActivityPub.announce(user, object)
+    new_data = activity.data
+    |> Map.put("object", object.data)
+
+    status = %{activity | data: new_data}
+    |> activity_to_status(%{for: user})
+
+    {:ok, status}
+  end
+
   def upload(%Plug.Upload{} = file, format \\ "xml") do
     {:ok, object} = ActivityPub.upload(file)
 
@@ -229,6 +242,16 @@ defmodule Pleroma.Web.TwitterAPI.TwitterAPI do
     ActivityRepresenter.to_map(activity, Map.merge(opts, %{user: user, liked_activity: liked_activity}))
   end
 
+  # For announces, fetch the announced activity and the user.
+  defp activity_to_status(%Activity{data: %{"type" => "Announce"}} = activity, opts) do
+    actor = get_in(activity.data, ["actor"])
+    user = User.get_cached_by_ap_id(actor)
+    [announced_activity] = Activity.all_by_object_ap_id(activity.data["object"])
+    announced_actor = User.get_cached_by_ap_id(announced_activity.data["actor"])
+
+    ActivityRepresenter.to_map(activity, Map.merge(opts, %{users: [user, announced_actor], announced_activity: announced_activity}))
+  end
+
   defp activity_to_status(activity, opts) do
     actor = get_in(activity.data, ["actor"])
     user = User.get_cached_by_ap_id(actor)