A module to handle coding from internal to wire ActivityPub and back.
"""
alias Pleroma.User
+ alias Pleroma.Object
+ alias Pleroma.Activity
+ alias Pleroma.Repo
alias Pleroma.Web.ActivityPub.ActivityPub
+ import Ecto.Query
+
+ require Logger
+
@doc """
Modifies an incoming AP object (mastodon format) to our internal format.
"""
def fix_object(object) do
object
|> Map.put("actor", object["attributedTo"])
+ |> fix_attachments
+ |> fix_context
+ |> fix_in_reply_to
+ |> fix_emoji
+ |> fix_tag
+ end
+
+ def fix_in_reply_to(%{"inReplyTo" => in_reply_to_id} = object)
+ when not is_nil(in_reply_to_id) do
+ case ActivityPub.fetch_object_from_id(in_reply_to_id) do
+ {:ok, replied_object} ->
+ activity = Activity.get_create_activity_by_object_ap_id(replied_object.data["id"])
+
+ object
+ |> Map.put("inReplyTo", replied_object.data["id"])
+ |> Map.put("inReplyToAtomUri", object["inReplyToAtomUri"] || in_reply_to_id)
+ |> Map.put("inReplyToStatusId", activity.id)
+ |> Map.put("conversation", replied_object.data["context"] || object["conversation"])
+ |> Map.put("context", replied_object.data["context"] || object["conversation"])
+
+ e ->
+ Logger.error("Couldn't fetch #{object["inReplyTo"]} #{inspect(e)}")
+ object
+ end
+ end
+
+ def fix_in_reply_to(object), do: object
+
+ def fix_context(object) do
+ object
+ |> Map.put("context", object["conversation"])
+ end
+
+ def fix_attachments(object) do
+ attachments =
+ (object["attachment"] || [])
+ |> Enum.map(fn data ->
+ url = [%{"type" => "Link", "mediaType" => data["mediaType"], "href" => data["url"]}]
+ Map.put(data, "url", url)
+ end)
+
+ object
+ |> Map.put("attachment", attachments)
+ end
+
+ def fix_emoji(object) do
+ tags = object["tag"] || []
+ emoji = tags |> Enum.filter(fn data -> data["type"] == "Emoji" and data["icon"] end)
+
+ emoji =
+ emoji
+ |> Enum.reduce(%{}, fn data, mapping ->
+ name = data["name"]
+
+ if String.starts_with?(name, ":") do
+ name = name |> String.slice(1..-2)
+ end
+
+ mapping |> Map.put(name, data["icon"]["url"])
+ end)
+
+ # we merge mastodon and pleroma emoji into a single mapping, to allow for both wire formats
+ emoji = Map.merge(object["emoji"] || %{}, emoji)
+
+ object
+ |> Map.put("emoji", emoji)
+ end
+
+ def fix_tag(object) do
+ tags =
+ (object["tag"] || [])
+ |> Enum.filter(fn data -> data["type"] == "Hashtag" and data["name"] end)
+ |> Enum.map(fn data -> String.slice(data["name"], 1..-1) end)
+
+ combined = (object["tag"] || []) ++ tags
+
+ object
+ |> Map.put("tag", combined)
end
# TODO: validate those with a Ecto scheme
# - tags
# - emoji
def handle_incoming(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
- with %User{} = user <- User.get_or_fetch_by_ap_id(data["actor"]) do
+ with nil <- Activity.get_create_activity_by_object_ap_id(object["id"]),
+ %User{} = user <- User.get_or_fetch_by_ap_id(data["actor"]) do
object = fix_object(data["object"])
+
params = %{
to: data["to"],
object: object,
actor: user,
- context: data["object"]["conversation"],
+ context: object["conversation"],
local: false,
published: data["published"],
- additional: Map.take(data, [
- "cc",
- "id"
- ])
+ additional:
+ Map.take(data, [
+ "cc",
+ "id"
+ ])
}
ActivityPub.create(params)
else
+ %Activity{} = activity -> {:ok, activity}
_e -> :error
end
end
- def handle_incoming(%{"type" => "Follow", "object" => followed, "actor" => follower, "id" => id}) do
- with %User{} = followed <- User.get_cached_by_ap_id(followed),
+ def handle_incoming(
+ %{"type" => "Follow", "object" => followed, "actor" => follower, "id" => id} = data
+ ) do
+ with %User{local: true} = followed <- User.get_cached_by_ap_id(followed),
%User{} = follower <- User.get_or_fetch_by_ap_id(follower),
{:ok, activity} <- ActivityPub.follow(follower, followed, id, false) do
- # TODO: Send an "Accept" activity.
+ ActivityPub.accept(%{to: [follower.ap_id], actor: followed.ap_id, object: data, local: true})
+
User.follow(follower, followed)
{:ok, activity}
else
end
end
+ def handle_incoming(
+ %{"type" => "Like", "object" => object_id, "actor" => actor, "id" => id} = data
+ ) do
+ with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
+ {:ok, object} <-
+ get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
+ {:ok, activity, object} <- ActivityPub.like(actor, object, id, false) do
+ {:ok, activity}
+ else
+ _e -> :error
+ end
+ end
+
+ def handle_incoming(
+ %{"type" => "Announce", "object" => object_id, "actor" => actor, "id" => id} = data
+ ) do
+ with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
+ {:ok, object} <-
+ get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
+ {:ok, activity, object} <- ActivityPub.announce(actor, object, id, false) do
+ {:ok, activity}
+ else
+ _e -> :error
+ end
+ end
+
+ def handle_incoming(
+ %{"type" => "Update", "object" => %{"type" => "Person"} = object, "actor" => actor_id} =
+ data
+ ) do
+ with %User{ap_id: ^actor_id} = actor <- User.get_by_ap_id(object["id"]) do
+ {:ok, new_user_data} = ActivityPub.user_data_from_user_object(object)
+
+ banner = new_user_data[:info]["banner"]
+
+ update_data =
+ new_user_data
+ |> Map.take([:name, :bio, :avatar])
+ |> Map.put(:info, Map.merge(actor.info, %{"banner" => banner}))
+
+ actor
+ |> User.upgrade_changeset(update_data)
+ |> User.update_and_set_cache()
+
+ ActivityPub.update(%{
+ local: false,
+ to: data["to"] || [],
+ cc: data["cc"] || [],
+ object: object,
+ actor: actor_id
+ })
+ else
+ e ->
+ Logger.error(e)
+ :error
+ end
+ end
+
+ # TODO: Make secure.
+ def handle_incoming(
+ %{"type" => "Delete", "object" => object_id, "actor" => actor, "id" => id} = data
+ ) do
+ object_id =
+ case object_id do
+ %{"id" => id} -> id
+ id -> id
+ end
+
+ with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
+ {:ok, object} <-
+ get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
+ {:ok, activity} <- ActivityPub.delete(object, false) do
+ {:ok, activity}
+ else
+ e -> :error
+ end
+ end
+
+ def handle_incoming(
+ %{
+ "type" => "Undo",
+ "object" => %{"type" => "Announce", "id" => object_id},
+ "actor" => actor,
+ "id" => id
+ } = data
+ ) do
+ with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
+ {:ok, object} <-
+ get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
+ {:ok, activity} <- ActivityPub.unannounce(object, false) do
+ {:ok, activity}
+ else
+ e -> :error
+ end
+ end
+
+ # TODO
+ # Accept
+ # Undo for non-Announce
+
def handle_incoming(_), do: :error
+ def get_obj_helper(id) do
+ if object = Object.get_by_ap_id(id), do: {:ok, object}, else: nil
+ end
+
+ def set_reply_to_uri(%{"inReplyTo" => inReplyTo} = object) do
+ with false <- String.starts_with?(inReplyTo, "http"),
+ {:ok, %{data: replied_to_object}} <- get_obj_helper(inReplyTo) do
+ Map.put(object, "inReplyTo", replied_to_object["external_url"] || inReplyTo)
+ else
+ _e -> object
+ end
+ end
+
+ def set_reply_to_uri(obj), do: obj
+
+ # Prepares the object of an outgoing create activity.
+ def prepare_object(object) do
+ object
+ |> set_sensitive
+ |> add_hashtags
+ |> add_mention_tags
+ |> add_emoji_tags
+ |> add_attributed_to
+ |> prepare_attachments
+ |> set_conversation
+ |> set_reply_to_uri
+ end
+
@doc
"""
internal -> Mastodon
"""
+
def prepare_outgoing(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
- object = object
- |> add_mention_tags
- |> add_attributed_to
+ object =
+ object
+ |> prepare_object
+
+ data =
+ data
+ |> Map.put("object", object)
+ |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
- data = data
- |> Map.put("object", object)
- |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
+ {:ok, data}
+ end
+
+ def prepare_outgoing(%{"type" => type} = data) do
+ data =
+ data
+ |> maybe_fix_object_url
+ |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
{:ok, data}
end
+ def maybe_fix_object_url(data) do
+ if is_binary(data["object"]) and not String.starts_with?(data["object"], "http") do
+ case ActivityPub.fetch_object_from_id(data["object"]) do
+ {:ok, relative_object} ->
+ if relative_object.data["external_url"] do
+ data =
+ data
+ |> Map.put("object", relative_object.data["external_url"])
+ else
+ data
+ end
+
+ e ->
+ Logger.error("Couldn't fetch #{data["object"]} #{inspect(e)}")
+ data
+ end
+ else
+ data
+ end
+ end
+
+ def add_hashtags(object) do
+ tags =
+ (object["tag"] || [])
+ |> Enum.map(fn tag ->
+ %{
+ "href" => Pleroma.Web.Endpoint.url() <> "/tags/#{tag}",
+ "name" => "##{tag}",
+ "type" => "Hashtag"
+ }
+ end)
+
+ object
+ |> Map.put("tag", tags)
+ end
+
def add_mention_tags(object) do
- mentions = object["to"]
- |> Enum.map(fn (ap_id) -> User.get_cached_by_ap_id(ap_id) end)
- |> Enum.filter(&(&1))
- |> Enum.map(fn(user) -> %{"type" => "Mention", "href" => user.ap_id, "name" => "@#{user.nickname}"} end)
+ recipients = object["to"] ++ (object["cc"] || [])
+
+ mentions =
+ recipients
+ |> Enum.map(fn ap_id -> User.get_cached_by_ap_id(ap_id) end)
+ |> Enum.filter(& &1)
+ |> Enum.map(fn user ->
+ %{"type" => "Mention", "href" => user.ap_id, "name" => "@#{user.nickname}"}
+ end)
tags = object["tag"] || []
|> 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
+ tags = object["tag"] || []
+ emoji = object["emoji"] || []
+
+ out =
+ 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
projects / akkoma / blobdiff