defmodule Pleroma.Web.ActivityPub.Builder do @moduledoc """ This module builds the objects. Meant to be used for creating local objects. This module encodes our addressing policies and general shape of our objects. """ alias Pleroma.Object alias Pleroma.User alias Pleroma.Web.ActivityPub.Utils alias Pleroma.Web.ActivityPub.Visibility @spec emoji_react(User.t(), Object.t(), String.t()) :: {:ok, map(), keyword()} def emoji_react(actor, object, emoji) do with {:ok, data, meta} <- object_action(actor, object) do data = data |> Map.put("content", emoji) |> Map.put("type", "EmojiReact") {:ok, data, meta} end end @spec undo(User.t(), Activity.t()) :: {:ok, map(), keyword()} def undo(actor, object) do {:ok, %{ "id" => Utils.generate_activity_id(), "actor" => actor.ap_id, "type" => "Undo", "object" => object.data["id"], "to" => object.data["to"] || [], "cc" => object.data["cc"] || [] }, []} end @spec delete(User.t(), String.t()) :: {:ok, map(), keyword()} def delete(actor, object_id) do object = Object.normalize(object_id, false) user = !object && User.get_cached_by_ap_id(object_id) to = case {object, user} do {%Object{}, _} -> # We are deleting an object, address everyone who was originally mentioned (object.data["to"] || []) ++ (object.data["cc"] || []) {_, %User{follower_address: follower_address}} -> # We are deleting a user, address the followers of that user [follower_address] end {:ok, %{ "id" => Utils.generate_activity_id(), "actor" => actor.ap_id, "object" => object_id, "to" => to, "type" => "Delete" }, []} end @spec tombstone(String.t(), String.t()) :: {:ok, map(), keyword()} def tombstone(actor, id) do {:ok, %{ "id" => id, "actor" => actor, "type" => "Tombstone" }, []} end @spec like(User.t(), Object.t()) :: {:ok, map(), keyword()} def like(actor, object) do with {:ok, data, meta} <- object_action(actor, object) do data = data |> Map.put("type", "Like") {:ok, data, meta} end end def announce(actor, object) do to = [actor.follower_address, object.data["actor"]] {:ok, %{ "id" => Utils.generate_activity_id(), "actor" => actor.ap_id, "object" => object.data["id"], "to" => to, "context" => object.data["context"], "type" => "Announce" }, []} end @spec object_action(User.t(), Object.t()) :: {:ok, map(), keyword()} defp object_action(actor, object) do object_actor = User.get_cached_by_ap_id(object.data["actor"]) # Address the actor of the object, and our actor's follower collection if the post is public. to = if Visibility.is_public?(object) do [actor.follower_address, object.data["actor"]] else [object.data["actor"]] end # CC everyone who's been addressed in the object, except ourself and the object actor's # follower collection cc = (object.data["to"] ++ (object.data["cc"] || [])) |> List.delete(actor.ap_id) |> List.delete(object_actor.follower_address) {:ok, %{ "id" => Utils.generate_activity_id(), "actor" => actor.ap_id, "object" => object.data["id"], "to" => to, "cc" => cc, "context" => object.data["context"] }, []} end end