122 lines
3.8 KiB
Elixir
122 lines
3.8 KiB
Elixir
defmodule Pleroma.Web.ActivityPub.SideEffects do
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@moduledoc """
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This module looks at an inserted object and executes the side effects that it
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implies. For example, a `Like` activity will increase the like count on the
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liked object, a `Follow` activity will add the user to the follower
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collection, and so on.
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"""
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alias Pleroma.Activity
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alias Pleroma.Notification
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alias Pleroma.Object
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alias Pleroma.Repo
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alias Pleroma.User
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alias Pleroma.Web.ActivityPub.ActivityPub
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alias Pleroma.Web.ActivityPub.Utils
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def handle(object, meta \\ [])
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# Tasks this handles:
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# - Add like to object
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# - Set up notification
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def handle(%{data: %{"type" => "Like"}} = object, meta) do
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liked_object = Object.get_by_ap_id(object.data["object"])
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Utils.add_like_to_object(object, liked_object)
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Notification.create_notifications(object)
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{:ok, object, meta}
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end
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def handle(%{data: %{"type" => "Undo", "object" => undone_object}} = object, meta) do
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with undone_object <- Activity.get_by_ap_id(undone_object),
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:ok <- handle_undoing(undone_object) do
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{:ok, object, meta}
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end
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end
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# Tasks this handles:
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# - Delete and unpins the create activity
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# - Replace object with Tombstone
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# - Set up notification
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# - Reduce the user note count
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# - Reduce the reply count
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# - Stream out the activity
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def handle(%{data: %{"type" => "Delete", "object" => deleted_object}} = object, meta) do
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deleted_object =
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Object.normalize(deleted_object, false) || User.get_cached_by_ap_id(deleted_object)
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result =
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case deleted_object do
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%Object{} ->
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with {:ok, deleted_object, activity} <- Object.delete(deleted_object),
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%User{} = user <- User.get_cached_by_ap_id(deleted_object.data["actor"]) do
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User.remove_pinnned_activity(user, activity)
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{:ok, user} = ActivityPub.decrease_note_count_if_public(user, deleted_object)
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if in_reply_to = deleted_object.data["inReplyTo"] do
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Object.decrease_replies_count(in_reply_to)
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end
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ActivityPub.stream_out(object)
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ActivityPub.stream_out_participations(deleted_object, user)
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:ok
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end
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%User{} ->
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with {:ok, _} <- User.delete(deleted_object) do
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:ok
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end
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end
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if result == :ok do
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Notification.create_notifications(object)
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{:ok, object, meta}
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else
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{:error, result}
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end
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end
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# Nothing to do
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def handle(object, meta) do
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{:ok, object, meta}
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end
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def handle_undoing(%{data: %{"type" => "Like"}} = object) do
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with %Object{} = liked_object <- Object.get_by_ap_id(object.data["object"]),
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{:ok, _} <- Utils.remove_like_from_object(object, liked_object),
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{:ok, _} <- Repo.delete(object) do
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:ok
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end
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end
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def handle_undoing(%{data: %{"type" => "EmojiReact"}} = object) do
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with %Object{} = reacted_object <- Object.get_by_ap_id(object.data["object"]),
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{:ok, _} <- Utils.remove_emoji_reaction_from_object(object, reacted_object),
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{:ok, _} <- Repo.delete(object) do
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:ok
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end
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end
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def handle_undoing(%{data: %{"type" => "Announce"}} = object) do
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with %Object{} = liked_object <- Object.get_by_ap_id(object.data["object"]),
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{:ok, _} <- Utils.remove_announce_from_object(object, liked_object),
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{:ok, _} <- Repo.delete(object) do
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:ok
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end
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end
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def handle_undoing(
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%{data: %{"type" => "Block", "actor" => blocker, "object" => blocked}} = object
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) do
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with %User{} = blocker <- User.get_cached_by_ap_id(blocker),
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%User{} = blocked <- User.get_cached_by_ap_id(blocked),
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{:ok, _} <- User.unblock(blocker, blocked),
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{:ok, _} <- Repo.delete(object) do
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:ok
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end
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end
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def handle_undoing(object), do: {:error, ["don't know how to handle", object]}
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end
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