Pleroma/lib/pleroma/web/activity_pub/builder.ex

309 lines
8.2 KiB
Elixir

# Pleroma: A lightweight social networking server
# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
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.Emoji
alias Pleroma.Object
alias Pleroma.User
alias Pleroma.Web.ActivityPub.Relay
alias Pleroma.Web.ActivityPub.Utils
alias Pleroma.Web.ActivityPub.Visibility
require Pleroma.Constants
def accept_or_reject(actor, activity, type) do
data = %{
"id" => Utils.generate_activity_id(),
"actor" => actor.ap_id,
"type" => type,
"object" => activity.data["id"],
"to" => [activity.actor]
}
{:ok, data, []}
end
@spec reject(User.t(), Activity.t()) :: {:ok, map(), keyword()}
def reject(actor, rejected_activity) do
accept_or_reject(actor, rejected_activity, "Reject")
end
@spec accept(User.t(), Activity.t()) :: {:ok, map(), keyword()}
def accept(actor, accepted_activity) do
accept_or_reject(actor, accepted_activity, "Accept")
end
@spec follow(User.t(), User.t()) :: {:ok, map(), keyword()}
def follow(follower, followed) do
data = %{
"id" => Utils.generate_activity_id(),
"actor" => follower.ap_id,
"type" => "Follow",
"object" => followed.ap_id,
"to" => [followed.ap_id]
}
{:ok, data, []}
end
@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, fetch: 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
def create(actor, object, recipients) do
context =
if is_map(object) do
object["context"]
else
nil
end
{:ok,
%{
"id" => Utils.generate_activity_id(),
"actor" => actor.ap_id,
"to" => recipients,
"object" => object,
"type" => "Create",
"published" => DateTime.utc_now() |> DateTime.to_iso8601()
}
|> Pleroma.Maps.put_if_present("context", context), []}
end
def chat_message(actor, recipient, content, opts \\ []) do
basic = %{
"id" => Utils.generate_object_id(),
"actor" => actor.ap_id,
"type" => "ChatMessage",
"to" => [recipient],
"content" => content,
"published" => DateTime.utc_now() |> DateTime.to_iso8601(),
"emoji" => Emoji.Formatter.get_emoji_map(content)
}
case opts[:attachment] do
%Object{data: attachment_data} ->
{
:ok,
Map.put(basic, "attachment", attachment_data),
[]
}
_ ->
{:ok, basic, []}
end
end
def answer(user, object, name) do
{:ok,
%{
"type" => "Answer",
"actor" => user.ap_id,
"attributedTo" => user.ap_id,
"cc" => [object.data["actor"]],
"to" => [],
"name" => name,
"inReplyTo" => object.data["id"],
"context" => object.data["context"],
"published" => DateTime.utc_now() |> DateTime.to_iso8601(),
"id" => Utils.generate_object_id()
}, []}
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
# Retricted to user updates for now, always public
@spec update(User.t(), Object.t()) :: {:ok, map(), keyword()}
def update(actor, object) do
to = [Pleroma.Constants.as_public(), actor.follower_address]
{:ok,
%{
"id" => Utils.generate_activity_id(),
"type" => "Update",
"actor" => actor.ap_id,
"object" => object,
"to" => to
}, []}
end
@spec block(User.t(), User.t()) :: {:ok, map(), keyword()}
def block(blocker, blocked) do
{:ok,
%{
"id" => Utils.generate_activity_id(),
"type" => "Block",
"actor" => blocker.ap_id,
"object" => blocked.ap_id,
"to" => [blocked.ap_id]
}, []}
end
@spec announce(User.t(), Object.t(), keyword()) :: {:ok, map(), keyword()}
def announce(actor, object, options \\ []) do
public? = Keyword.get(options, :public, false)
to =
cond do
actor.ap_id == Relay.ap_id() ->
[actor.follower_address]
public? and Visibility.is_local_public?(object) ->
[actor.follower_address, object.data["actor"], Utils.as_local_public()]
public? ->
[actor.follower_address, object.data["actor"], Pleroma.Constants.as_public()]
true ->
[actor.follower_address, object.data["actor"]]
end
{:ok,
%{
"id" => Utils.generate_activity_id(),
"actor" => actor.ap_id,
"object" => object.data["id"],
"to" => to,
"context" => object.data["context"],
"type" => "Announce",
"published" => Utils.make_date()
}, []}
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
@spec pin(User.t(), Object.t()) :: {:ok, map(), keyword()}
def pin(%User{} = user, object) do
{:ok,
%{
"id" => Utils.generate_activity_id(),
"target" => pinned_url(user.nickname),
"object" => object.data["id"],
"actor" => user.ap_id,
"type" => "Add",
"to" => [Pleroma.Constants.as_public()],
"cc" => [user.follower_address]
}, []}
end
@spec unpin(User.t(), Object.t()) :: {:ok, map, keyword()}
def unpin(%User{} = user, object) do
{:ok,
%{
"id" => Utils.generate_activity_id(),
"target" => pinned_url(user.nickname),
"object" => object.data["id"],
"actor" => user.ap_id,
"type" => "Remove",
"to" => [Pleroma.Constants.as_public()],
"cc" => [user.follower_address]
}, []}
end
defp pinned_url(nickname) when is_binary(nickname) do
Pleroma.Web.Router.Helpers.activity_pub_url(Pleroma.Web.Endpoint, :pinned, nickname)
end
end