Refactor code to comply with credo suggestions

[akkoma] / lib / pleroma / web / activity_pub / activity_pub.ex

diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
index f7ba1bb37e50959b09b20e42f92934ebfd96353e..02255e0a427c7fae327a92da12e3b31e2cee9981 100644 (file)
--- a/lib/pleroma/web/activity_pub/activity_pub.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
@@ -1,13 +1,16 @@
 defmodule Pleroma.Web.ActivityPub.ActivityPub do
-  alias Pleroma.Repo
-  alias Pleroma.{Activity, Object, Upload}
+  alias Pleroma.{Activity, Repo, Object, Upload, User, Web}
+  alias Ecto.{Changeset, UUID}
   import Ecto.Query
 
   def insert(map) when is_map(map) do
-    map = Map.put_new_lazy(map, "id", &generate_activity_id/0)
+    map = map
+    |> Map.put_new_lazy("id", &generate_activity_id/0)
+    |> Map.put_new_lazy("published", &make_date/0)
 
-    map = if map["object"] do
+    map = if is_map(map["object"]) do
       object = Map.put_new_lazy(map["object"], "id", &generate_object_id/0)
+      Repo.insert!(%Object{data: object})
       Map.put(map, "object", object)
     else
       map
@@ -16,6 +19,77 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     Repo.insert(%Activity{data: map})
   end
 
+  def like(%User{ap_id: ap_id} = user, %Object{data: %{"id" => id}} = object) do
+    cond do
+      # There's already a like here, so return the original activity.
+      ap_id in (object.data["likes"] || []) ->
+        query = from activity in Activity,
+          where: fragment("? @> ?", activity.data, ^%{actor: ap_id, object: id, type: "Like"})
+
+        activity = Repo.one(query)
+        {:ok, activity, object}
+      true ->
+        data = %{
+          "type" => "Like",
+          "actor" => ap_id,
+          "object" => id,
+          "to" => [User.ap_followers(user), object.data["actor"]]
+        }
+
+        {:ok, activity} = insert(data)
+
+        likes = [ap_id | (object.data["likes"] || [])] |> Enum.uniq
+
+        new_data = object.data
+        |> Map.put("like_count", length(likes))
+        |> Map.put("likes", likes)
+
+        changeset = Changeset.change(object, data: new_data)
+        {:ok, object} = Repo.update(changeset)
+
+        update_object_in_activities(object)
+
+        {:ok, activity, object}
+    end
+  end
+
+  defp update_object_in_activities(%{data: %{"id" => id}} = object) do
+    # Update activities that already had this. Could be done in a seperate process.
+    relevant_activities = Activity.all_by_object_ap_id(id)
+    Enum.map(relevant_activities, fn (activity) ->
+      new_activity_data = activity.data |> Map.put("object", object.data)
+      changeset = Changeset.change(activity, data: new_activity_data)
+      Repo.update(changeset)
+    end)
+  end
+
+  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"})
+
+    activity = Repo.one(query)
+
+    if activity do
+      # just delete for now...
+      {:ok, _activity} = Repo.delete(activity)
+
+      likes = (object.data["likes"] || []) |> List.delete(ap_id)
+
+      new_data = object.data
+      |> Map.put("like_count", length(likes))
+      |> Map.put("likes", likes)
+
+      changeset = Changeset.change(object, data: new_data)
+      {:ok, object} = Repo.update(changeset)
+
+      update_object_in_activities(object)
+
+      {:ok, object}
+    else
+      {:ok, object}
+    end
+  end
+
   def generate_activity_id do
     generate_id("activities")
   end
@@ -29,13 +103,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
   end
 
   def generate_id(type) do
-    host =
-      Application.get_env(:pleroma, Pleroma.Web.Endpoint)
-      |> Keyword.fetch!(:url)
-      |> Keyword.fetch!(:host)
-
-    protocol = Application.get_env(:pleroma, Pleroma.Web.Endpoint) |> Keyword.fetch!(:protocol)
-    "#{protocol}://#{host}/#{type}/#{Ecto.UUID.generate}"
+    "#{Web.base_url()}/#{type}/#{UUID.generate}"
   end
 
   def fetch_public_activities(opts \\ %{}) do
@@ -59,8 +127,44 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     query = from activity in query,
       where: activity.id > ^since_id
 
-    Repo.all(query)
-    |> Enum.reverse
+    query = if opts["max_id"] do
+      from activity in query, where: activity.id < ^opts["max_id"]
+    else
+      query
+    end
+
+    query = if opts["actor_id"] do
+      from activity in query,
+        where: fragment("? @> ?", activity.data, ^%{actor: opts["actor_id"]})
+    else
+      query
+    end
+
+    Enum.reverse(Repo.all(query))
+  end
+
+  def announce(%User{ap_id: ap_id} = user, %Object{data: %{"id" => id}} = object) do
+    data = %{
+      "type" => "Announce",
+      "actor" => ap_id,
+      "object" => id,
+      "to" => [User.ap_followers(user), object.data["actor"]]
+    }
+
+    {:ok, activity} = insert(data)
+
+    announcements = [ap_id | (object.data["announcements"] || [])] |> Enum.uniq
+
+    new_data = object.data
+    |> Map.put("announcement_count", length(announcements))
+    |> Map.put("announcements", announcements)
+
+    changeset = Changeset.change(object, data: new_data)
+    {:ok, object} = Repo.update(changeset)
+
+    update_object_in_activities(object)
+
+    {:ok, activity, object}
   end
 
   def fetch_activities_for_context(context) do
@@ -69,8 +173,12 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     Repo.all(query)
   end
 
-  def upload(%Plug.Upload{} = file) do
+  def upload(file) do
     data = Upload.store(file)
     Repo.insert(%Object{data: data})
   end
+
+  defp make_date do
+    DateTime.utc_now() |> DateTime.to_iso8601
+  end
 end