akkoma/lib/pleroma/web/activity_pub/builder.ex
FloatingGhost 6cb40bee26 Migrate to phoenix 1.7 (#626)
Closes #612

Co-authored-by: tusooa <tusooa@kazv.moe>
Reviewed-on: AkkomaGang/akkoma#626
Co-authored-by: FloatingGhost <hannah@coffee-and-dreams.uk>
Co-committed-by: FloatingGhost <hannah@coffee-and-dreams.uk>
2023-08-15 10:22:18 +00:00

409 lines
11 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
alias Pleroma.Web.CommonAPI.ActivityDraft
alias Pleroma.Web.Endpoint
use Pleroma.Web, :verified_routes
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
defp unicode_emoji_react(_object, data, emoji) do
data
|> Map.put("content", emoji)
|> Map.put("type", "EmojiReact")
end
defp add_emoji_content(data, emoji, url) do
data
|> Map.put("content", Emoji.maybe_quote(emoji))
|> Map.put("type", "EmojiReact")
|> Map.put("tag", [
%{}
|> Map.put("id", url)
|> Map.put("type", "Emoji")
|> Map.put("name", Emoji.maybe_quote(emoji))
|> Map.put(
"icon",
%{}
|> Map.put("type", "Image")
|> Map.put("url", url)
)
])
end
defp remote_custom_emoji_react(
%{data: %{"reactions" => existing_reactions}},
data,
emoji
) do
[emoji_code, instance] = String.split(Emoji.stripped_name(emoji), "@")
matching_reaction =
Enum.find(
existing_reactions,
fn [name, _, url] ->
url = URI.parse(url)
url.host == instance && name == emoji_code
end
)
if matching_reaction do
[name, _, url] = matching_reaction
add_emoji_content(data, name, url)
else
{:error, "Could not react"}
end
end
defp remote_custom_emoji_react(_object, _data, _emoji) do
{:error, "Could not react"}
end
defp local_custom_emoji_react(data, emoji) do
with %{} = emojo <- Emoji.get(emoji) do
path = emojo |> Map.get(:file)
url = "#{Endpoint.url()}#{path}"
add_emoji_content(data, emojo.code, url)
else
_ -> {:error, "Emoji does not exist"}
end
end
defp custom_emoji_react(object, data, emoji) do
if String.contains?(emoji, "@") do
remote_custom_emoji_react(object, data, emoji)
else
local_custom_emoji_react(data, emoji)
end
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 =
if Emoji.is_unicode_emoji?(emoji) do
unicode_emoji_react(object, data, emoji)
else
custom_emoji_react(object, data, emoji)
end
{: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
@spec note(ActivityDraft.t()) :: {:ok, map(), keyword()}
def note(%ActivityDraft{} = draft) do
data =
%{
"type" => "Note",
"to" => draft.to,
"cc" => draft.cc,
"content" => draft.content_html,
"summary" => draft.summary,
"sensitive" => draft.sensitive,
"context" => draft.context,
"attachment" => draft.attachments,
"actor" => draft.user.ap_id,
"tag" => Keyword.values(draft.tags) |> Enum.uniq()
}
|> add_in_reply_to(draft.in_reply_to)
|> add_quote(draft.quote)
|> Map.merge(draft.extra)
{:ok, data, []}
end
defp add_in_reply_to(object, nil), do: object
defp add_in_reply_to(object, in_reply_to) do
with %Object{} = in_reply_to_object <- Object.normalize(in_reply_to, fetch: false) do
Map.put(object, "inReplyTo", in_reply_to_object.data["id"])
else
_ -> object
end
end
defp add_quote(object, nil), do: object
defp add_quote(object, quote) do
with %Object{} = quote_object <- Object.normalize(quote, fetch: false) do
Map.put(object, "quoteUri", quote_object.data["id"])
else
_ -> object
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
@spec update(User.t(), Object.t()) :: {:ok, map(), keyword()}
def update(actor, object) do
{to, cc} =
if object["type"] in Pleroma.Constants.actor_types() do
# User updates, always public
{[Pleroma.Constants.as_public(), actor.follower_address], []}
else
# Status updates, follow the recipients in the object
{object["to"] || [], object["cc"] || []}
end
{:ok,
%{
"id" => Utils.generate_activity_id(),
"type" => "Update",
"actor" => actor.ap_id,
"object" => object,
"to" => to,
"cc" => cc
}, []}
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
url(~p[/users/#{nickname}/collections/featured])
end
end