Thomas Citharel
482
lib/service/activity_pub/transmogrifier.ex
Normal file
482
lib/service/activity_pub/transmogrifier.ex
Normal file
@@ -0,0 +1,482 @@
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defmodule Eventos.Service.ActivityPub.Transmogrifier do
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@moduledoc """
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A module to handle coding from internal to wire ActivityPub and back.
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"""
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alias Eventos.Accounts.Account
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alias Eventos.Accounts
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alias Eventos.Events.Event
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alias Eventos.Service.ActivityPub
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import Ecto.Query
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require Logger
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@doc """
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Modifies an incoming AP object (mastodon format) to our internal format.
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"""
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def fix_object(object) do
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object
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|> Map.put("actor", object["attributedTo"])
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|> fix_attachments
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|> fix_context
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#|> fix_in_reply_to
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|> fix_emoji
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|> fix_tag
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end
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# def fix_in_reply_to(%{"inReplyTo" => in_reply_to_id} = object)
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# when not is_nil(in_reply_to_id) do
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# case ActivityPub.fetch_object_from_id(in_reply_to_id) do
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# {:ok, replied_object} ->
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# activity = Activity.get_create_activity_by_object_ap_id(replied_object.data["id"])
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#
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# object
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# |> Map.put("inReplyTo", replied_object.data["id"])
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# |> Map.put("inReplyToAtomUri", object["inReplyToAtomUri"] || in_reply_to_id)
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# |> Map.put("inReplyToStatusId", activity.id)
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# |> Map.put("conversation", replied_object.data["context"] || object["conversation"])
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# |> Map.put("context", replied_object.data["context"] || object["conversation"])
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#
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# e ->
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# Logger.error("Couldn't fetch #{object["inReplyTo"]} #{inspect(e)}")
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# object
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# end
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# end
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def fix_in_reply_to(object), do: object
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def fix_context(object) do
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object
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|> Map.put("context", object["conversation"])
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end
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def fix_attachments(object) do
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attachments =
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(object["attachment"] || [])
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|> Enum.map(fn data ->
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url = [%{"type" => "Link", "mediaType" => data["mediaType"], "href" => data["url"]}]
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Map.put(data, "url", url)
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end)
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object
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|> Map.put("attachment", attachments)
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end
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def fix_emoji(object) do
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tags = object["tag"] || []
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emoji = tags |> Enum.filter(fn data -> data["type"] == "Emoji" and data["icon"] end)
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emoji =
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emoji
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|> Enum.reduce(%{}, fn data, mapping ->
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name = data["name"]
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if String.starts_with?(name, ":") do
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name = name |> String.slice(1..-2)
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end
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mapping |> Map.put(name, data["icon"]["url"])
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end)
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# we merge mastodon and pleroma emoji into a single mapping, to allow for both wire formats
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emoji = Map.merge(object["emoji"] || %{}, emoji)
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object
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|> Map.put("emoji", emoji)
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end
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def fix_tag(object) do
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tags =
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(object["tag"] || [])
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|> Enum.filter(fn data -> data["type"] == "Hashtag" and data["name"] end)
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|> Enum.map(fn data -> String.slice(data["name"], 1..-1) end)
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combined = (object["tag"] || []) ++ tags
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object
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|> Map.put("tag", combined)
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end
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# TODO: validate those with a Ecto scheme
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# - tags
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# - emoji
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def handle_incoming(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
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with %Account{} = account <- Account.get_or_fetch_by_url(data["actor"]) do
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object = fix_object(data["object"])
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params = %{
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to: data["to"],
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object: object,
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actor: account,
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context: object["conversation"],
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local: false,
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published: data["published"],
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additional:
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Map.take(data, [
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"cc",
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"id"
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])
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}
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ActivityPub.create(params)
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end
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end
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def handle_incoming(
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%{"type" => "Follow", "object" => followed, "actor" => follower, "id" => id} = data
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) do
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with %Account{} = followed <- Accounts.get_account_by_url(followed),
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%Account{} = follower <- Accounts.get_or_fetch_by_url(follower),
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{:ok, activity} <- ActivityPub.follow(follower, followed, id, false) do
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ActivityPub.accept(%{to: [follower.url], actor: followed.url, object: data, local: true})
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#Accounts.follow(follower, followed)
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{:ok, activity}
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else
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_e -> :error
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end
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end
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#
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# def handle_incoming(
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# %{"type" => "Like", "object" => object_id, "actor" => actor, "id" => id} = data
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# ) do
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# with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
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# {:ok, object} <-
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# get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
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# {:ok, activity, object} <- ActivityPub.like(actor, object, id, false) do
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# {:ok, activity}
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# else
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# _e -> :error
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# end
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# end
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#
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# def handle_incoming(
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# %{"type" => "Announce", "object" => object_id, "actor" => actor, "id" => id} = data
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# ) do
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# with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
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# {:ok, object} <-
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# get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
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# {:ok, activity, object} <- ActivityPub.announce(actor, object, id, false) do
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# {:ok, activity}
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# else
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# _e -> :error
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# end
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# end
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#
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# def handle_incoming(
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# %{"type" => "Update", "object" => %{"type" => "Person"} = object, "actor" => actor_id} =
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# data
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# ) do
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# with %User{ap_id: ^actor_id} = actor <- User.get_by_ap_id(object["id"]) do
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# {:ok, new_user_data} = ActivityPub.user_data_from_user_object(object)
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#
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# banner = new_user_data[:info]["banner"]
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#
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# update_data =
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# new_user_data
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# |> Map.take([:name, :bio, :avatar])
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# |> Map.put(:info, Map.merge(actor.info, %{"banner" => banner}))
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#
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# actor
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# |> User.upgrade_changeset(update_data)
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# |> User.update_and_set_cache()
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#
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# ActivityPub.update(%{
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# local: false,
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# to: data["to"] || [],
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# cc: data["cc"] || [],
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# object: object,
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# actor: actor_id
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# })
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# else
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# e ->
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# Logger.error(e)
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# :error
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# end
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# end
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#
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# # TODO: Make secure.
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# def handle_incoming(
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# %{"type" => "Delete", "object" => object_id, "actor" => actor, "id" => id} = data
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# ) do
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# object_id =
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# case object_id do
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# %{"id" => id} -> id
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# id -> id
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# end
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#
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# with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
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# {:ok, object} <-
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# get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
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# {:ok, activity} <- ActivityPub.delete(object, false) do
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# {:ok, activity}
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# else
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# e -> :error
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# end
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# end
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#
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# # TODO
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# # Accept
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# # Undo
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#
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# def handle_incoming(_), do: :error
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#
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# def get_obj_helper(id) do
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# if object = Object.get_by_ap_id(id), do: {:ok, object}, else: nil
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# end
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#
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# def set_reply_to_uri(%{"inReplyTo" => inReplyTo} = object) do
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# with false <- String.starts_with?(inReplyTo, "http"),
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# {:ok, %{data: replied_to_object}} <- get_obj_helper(inReplyTo) do
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# Map.put(object, "inReplyTo", replied_to_object["external_url"] || inReplyTo)
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# else
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# _e -> object
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# end
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# end
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#
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# def set_reply_to_uri(obj), do: obj
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#
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# # Prepares the object of an outgoing create activity.
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# def prepare_object(object) do
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# object
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# |> set_sensitive
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# |> add_hashtags
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# |> add_mention_tags
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# |> add_emoji_tags
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# |> add_attributed_to
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# |> prepare_attachments
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# |> set_conversation
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# |> set_reply_to_uri
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# end
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@doc
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"""
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internal -> Mastodon
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"""
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def prepare_outgoing(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
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object =
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object
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#|> prepare_object
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data =
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data
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|> Map.put("object", object)
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|> Map.put("@context", "https://www.w3.org/ns/activitystreams")
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{:ok, data}
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end
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def prepare_outgoing(%{"type" => type} = data) do
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data =
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data
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#|> maybe_fix_object_url
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|> Map.put("@context", "https://www.w3.org/ns/activitystreams")
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{:ok, data}
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end
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def prepare_outgoing(%Event{} = event) do
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event =
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event
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|> Map.from_struct
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|> Map.drop([:"__meta__"])
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|> Map.put(:"@context", "https://www.w3.org/ns/activitystreams")
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{:ok, event}
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end
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#
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# def maybe_fix_object_url(data) do
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# if is_binary(data["object"]) and not String.starts_with?(data["object"], "http") do
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# case ActivityPub.fetch_object_from_id(data["object"]) do
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# {:ok, relative_object} ->
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# if relative_object.data["external_url"] do
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# data =
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# data
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# |> Map.put("object", relative_object.data["external_url"])
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# else
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# data
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# end
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#
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# e ->
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# Logger.error("Couldn't fetch #{data["object"]} #{inspect(e)}")
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# data
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||||
# end
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# else
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||||
# data
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||||
# end
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||||
# end
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#
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# def add_hashtags(object) do
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# tags =
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# (object["tag"] || [])
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# |> Enum.map(fn tag ->
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# %{
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# "href" => Pleroma.Web.Endpoint.url() <> "/tags/#{tag}",
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# "name" => "##{tag}",
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# "type" => "Hashtag"
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# }
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# end)
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#
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# object
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# |> Map.put("tag", tags)
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# end
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#
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# def add_mention_tags(object) do
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# recipients = object["to"] ++ (object["cc"] || [])
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#
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# mentions =
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# recipients
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||||
# |> Enum.map(fn ap_id -> User.get_cached_by_ap_id(ap_id) end)
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||||
# |> Enum.filter(& &1)
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||||
# |> Enum.map(fn user ->
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# %{"type" => "Mention", "href" => user.ap_id, "name" => "@#{user.nickname}"}
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||||
# end)
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||||
#
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# tags = object["tag"] || []
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||||
#
|
||||
# object
|
||||
# |> Map.put("tag", tags ++ mentions)
|
||||
# end
|
||||
#
|
||||
# # TODO: we should probably send mtime instead of unix epoch time for updated
|
||||
# def add_emoji_tags(object) do
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# tags = object["tag"] || []
|
||||
# emoji = object["emoji"] || []
|
||||
#
|
||||
# out =
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# emoji
|
||||
# |> Enum.map(fn {name, url} ->
|
||||
# %{
|
||||
# "icon" => %{"url" => url, "type" => "Image"},
|
||||
# "name" => ":" <> name <> ":",
|
||||
# "type" => "Emoji",
|
||||
# "updated" => "1970-01-01T00:00:00Z",
|
||||
# "id" => url
|
||||
# }
|
||||
# end)
|
||||
#
|
||||
# object
|
||||
# |> Map.put("tag", tags ++ out)
|
||||
# end
|
||||
#
|
||||
# def set_conversation(object) do
|
||||
# Map.put(object, "conversation", object["context"])
|
||||
# end
|
||||
#
|
||||
# def set_sensitive(object) do
|
||||
# tags = object["tag"] || []
|
||||
# Map.put(object, "sensitive", "nsfw" in tags)
|
||||
# end
|
||||
#
|
||||
# def add_attributed_to(object) do
|
||||
# attributedTo = object["attributedTo"] || object["actor"]
|
||||
#
|
||||
# object
|
||||
# |> Map.put("attributedTo", attributedTo)
|
||||
# end
|
||||
#
|
||||
# def prepare_attachments(object) do
|
||||
# attachments =
|
||||
# (object["attachment"] || [])
|
||||
# |> Enum.map(fn data ->
|
||||
# [%{"mediaType" => media_type, "href" => href} | _] = data["url"]
|
||||
# %{"url" => href, "mediaType" => media_type, "name" => data["name"], "type" => "Document"}
|
||||
# end)
|
||||
#
|
||||
# object
|
||||
# |> Map.put("attachment", attachments)
|
||||
# end
|
||||
#
|
||||
# defp user_upgrade_task(user) do
|
||||
# old_follower_address = User.ap_followers(user)
|
||||
#
|
||||
# q =
|
||||
# from(
|
||||
# u in User,
|
||||
# where: ^old_follower_address in u.following,
|
||||
# update: [
|
||||
# set: [
|
||||
# following:
|
||||
# fragment(
|
||||
# "array_replace(?,?,?)",
|
||||
# u.following,
|
||||
# ^old_follower_address,
|
||||
# ^user.follower_address
|
||||
# )
|
||||
# ]
|
||||
# ]
|
||||
# )
|
||||
#
|
||||
# Repo.update_all(q, [])
|
||||
#
|
||||
# maybe_retire_websub(user.ap_id)
|
||||
#
|
||||
# # Only do this for recent activties, don't go through the whole db.
|
||||
# # Only look at the last 1000 activities.
|
||||
# since = (Repo.aggregate(Activity, :max, :id) || 0) - 1_000
|
||||
#
|
||||
# q =
|
||||
# from(
|
||||
# a in Activity,
|
||||
# where: ^old_follower_address in a.recipients,
|
||||
# where: a.id > ^since,
|
||||
# update: [
|
||||
# set: [
|
||||
# recipients:
|
||||
# fragment(
|
||||
# "array_replace(?,?,?)",
|
||||
# a.recipients,
|
||||
# ^old_follower_address,
|
||||
# ^user.follower_address
|
||||
# )
|
||||
# ]
|
||||
# ]
|
||||
# )
|
||||
#
|
||||
# Repo.update_all(q, [])
|
||||
# end
|
||||
#
|
||||
# def upgrade_user_from_ap_id(ap_id, async \\ true) do
|
||||
# with %User{local: false} = user <- User.get_by_ap_id(ap_id),
|
||||
# {:ok, data} <- ActivityPub.fetch_and_prepare_user_from_ap_id(ap_id) do
|
||||
# data =
|
||||
# data
|
||||
# |> Map.put(:info, Map.merge(user.info, data[:info]))
|
||||
#
|
||||
# already_ap = User.ap_enabled?(user)
|
||||
#
|
||||
# {:ok, user} =
|
||||
# User.upgrade_changeset(user, data)
|
||||
# |> Repo.update()
|
||||
#
|
||||
# if !already_ap do
|
||||
# # This could potentially take a long time, do it in the background
|
||||
# if async do
|
||||
# Task.start(fn ->
|
||||
# user_upgrade_task(user)
|
||||
# end)
|
||||
# else
|
||||
# user_upgrade_task(user)
|
||||
# end
|
||||
# end
|
||||
#
|
||||
# {:ok, user}
|
||||
# else
|
||||
# e -> e
|
||||
# end
|
||||
# end
|
||||
#
|
||||
# def maybe_retire_websub(ap_id) do
|
||||
# # some sanity checks
|
||||
# if is_binary(ap_id) && String.length(ap_id) > 8 do
|
||||
# q =
|
||||
# from(
|
||||
# ws in Pleroma.Web.Websub.WebsubClientSubscription,
|
||||
# where: fragment("? like ?", ws.topic, ^"#{ap_id}%")
|
||||
# )
|
||||
#
|
||||
# Repo.delete_all(q)
|
||||
# end
|
||||
# end
|
||||
end
|
||||
Reference in New Issue
Block a user