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diff --git a/lib/pleroma/web/activity_pub/utils.ex b/lib/pleroma/web/activity_pub/utils.ex
index 66e8950bc..be15fe6c5 100644
--- a/lib/pleroma/web/activity_pub/utils.ex
+++ b/lib/pleroma/web/activity_pub/utils.ex
@@ -1,748 +1,749 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.Utils do
alias Ecto.Changeset
alias Ecto.UUID
alias Pleroma.Activity
alias Pleroma.Notification
alias Pleroma.Object
alias Pleroma.Repo
alias Pleroma.User
alias Pleroma.Web
alias Pleroma.Web.ActivityPub.Visibility
alias Pleroma.Web.Endpoint
alias Pleroma.Web.Router.Helpers
import Ecto.Query
require Logger
- @supported_object_types ["Article", "Note", "Video", "Page"]
+ @supported_object_types ["Article", "Note", "Video", "Page", "Question"]
# Some implementations send the actor URI as the actor field, others send the entire actor object,
# so figure out what the actor's URI is based on what we have.
def get_ap_id(object) do
case object do
%{"id" => id} -> id
id -> id
end
end
def normalize_params(params) do
Map.put(params, "actor", get_ap_id(params["actor"]))
end
def determine_explicit_mentions(%{"tag" => tag} = _object) when is_list(tag) do
tag
|> Enum.filter(fn x -> is_map(x) end)
|> Enum.filter(fn x -> x["type"] == "Mention" end)
|> Enum.map(fn x -> x["href"] end)
end
def determine_explicit_mentions(%{"tag" => tag} = object) when is_map(tag) do
Map.put(object, "tag", [tag])
|> determine_explicit_mentions()
end
def determine_explicit_mentions(_), do: []
defp recipient_in_collection(ap_id, coll) when is_binary(coll), do: ap_id == coll
defp recipient_in_collection(ap_id, coll) when is_list(coll), do: ap_id in coll
defp recipient_in_collection(_, _), do: false
def recipient_in_message(ap_id, params) do
cond do
recipient_in_collection(ap_id, params["to"]) ->
true
recipient_in_collection(ap_id, params["cc"]) ->
true
recipient_in_collection(ap_id, params["bto"]) ->
true
recipient_in_collection(ap_id, params["bcc"]) ->
true
# if the message is unaddressed at all, then assume it is directly addressed
# to the recipient
!params["to"] && !params["cc"] && !params["bto"] && !params["bcc"] ->
true
true ->
false
end
end
defp extract_list(target) when is_binary(target), do: [target]
defp extract_list(lst) when is_list(lst), do: lst
defp extract_list(_), do: []
def maybe_splice_recipient(ap_id, params) do
need_splice =
!recipient_in_collection(ap_id, params["to"]) &&
!recipient_in_collection(ap_id, params["cc"])
cc_list = extract_list(params["cc"])
if need_splice do
params
|> Map.put("cc", [ap_id | cc_list])
else
params
end
end
def make_json_ld_header do
%{
"@context" => [
"https://www.w3.org/ns/activitystreams",
"#{Web.base_url()}/schemas/litepub-0.1.jsonld",
%{
"@language" => "und"
}
]
}
end
def make_date do
DateTime.utc_now() |> DateTime.to_iso8601()
end
def generate_question_id do
generate_id("questions")
end
def generate_activity_id do
generate_id("activities")
end
def generate_context_id do
generate_id("contexts")
end
def generate_object_id do
Helpers.o_status_url(Endpoint, :object, UUID.generate())
end
def generate_id(type) do
"#{Web.base_url()}/#{type}/#{UUID.generate()}"
end
def get_notified_from_object(%{"type" => type} = object) when type in @supported_object_types do
fake_create_activity = %{
"to" => object["to"],
"cc" => object["cc"],
"type" => "Create",
"object" => object
}
Notification.get_notified_from_activity(%Activity{data: fake_create_activity}, false)
end
def get_notified_from_object(object) do
Notification.get_notified_from_activity(%Activity{data: object}, false)
end
def create_context(context) do
context = context || generate_id("contexts")
changeset = Object.context_mapping(context)
case Repo.insert(changeset) do
{:ok, object} ->
object
# This should be solved by an upsert, but it seems ecto
# has problems accessing the constraint inside the jsonb.
{:error, _} ->
Object.get_cached_by_ap_id(context)
end
end
@doc """
Enqueues an activity for federation if it's local
"""
def maybe_federate(%Activity{local: true} = activity) do
priority =
case activity.data["type"] do
"Delete" -> 10
"Create" -> 1
_ -> 5
end
Pleroma.Web.Federator.publish(activity, priority)
:ok
end
def maybe_federate(_), do: :ok
@doc """
Adds an id and a published data if they aren't there,
also adds it to an included object
"""
def lazy_put_activity_defaults(map, fake \\ false) do
map =
unless fake do
%{data: %{"id" => context}, id: context_id} = create_context(map["context"])
map
|> Map.put_new_lazy("id", &generate_activity_id/0)
|> Map.put_new_lazy("published", &make_date/0)
|> Map.put_new("context", context)
|> Map.put_new("context_id", context_id)
else
map
|> Map.put_new("id", "pleroma:fakeid")
|> Map.put_new_lazy("published", &make_date/0)
|> Map.put_new("context", "pleroma:fakecontext")
|> Map.put_new("context_id", -1)
end
if is_map(map["object"]) do
object = lazy_put_object_defaults(map["object"], map, fake)
%{map | "object" => object}
else
map
end
end
@doc """
Adds an id and published date if they aren't there.
"""
def lazy_put_object_defaults(map, activity \\ %{}, fake)
def lazy_put_object_defaults(map, activity, true = _fake) do
map
|> Map.put_new_lazy("published", &make_date/0)
|> Map.put_new("id", "pleroma:fake_object_id")
|> Map.put_new("context", activity["context"])
|> Map.put_new("fake", true)
|> Map.put_new("context_id", activity["context_id"])
end
def lazy_put_object_defaults(map, activity, _fake) do
map
|> Map.put_new_lazy("id", &generate_object_id/0)
|> Map.put_new_lazy("published", &make_date/0)
|> Map.put_new("context", activity["context"])
|> Map.put_new("context_id", activity["context_id"])
end
@doc """
Inserts a full object if it is contained in an activity.
"""
def insert_full_object(%{"object" => %{"type" => type} = object_data})
when is_map(object_data) and type in @supported_object_types do
with {:ok, object} <- Object.create(object_data) do
{:ok, object}
end
end
def insert_full_object(_), do: {:ok, nil}
def update_object_in_activities(%{data: %{"id" => id}} = object) do
# TODO
# Update activities that already had this. Could be done in a seperate process.
# Alternatively, just don't do this and fetch the current object each time. Most
# could probably be taken from cache.
relevant_activities = Activity.get_all_create_by_object_ap_id(id)
Enum.map(relevant_activities, fn activity ->
new_activity_data = activity.data |> Map.put("object", object.data)
changeset = Changeset.change(activity, data: new_activity_data)
Repo.update(changeset)
end)
end
#### Like-related helpers
@doc """
Returns an existing like if a user already liked an object
"""
def get_existing_like(actor, %{data: %{"id" => id}}) do
query =
from(
activity in Activity,
where: fragment("(?)->>'actor' = ?", activity.data, ^actor),
# this is to use the index
where:
fragment(
"coalesce((?)->'object'->>'id', (?)->>'object') = ?",
activity.data,
activity.data,
^id
),
where: fragment("(?)->>'type' = 'Like'", activity.data)
)
Repo.one(query)
end
@doc """
Returns like activities targeting an object
"""
def get_object_likes(%{data: %{"id" => id}}) do
query =
from(
activity in Activity,
# this is to use the index
where:
fragment(
"coalesce((?)->'object'->>'id', (?)->>'object') = ?",
activity.data,
activity.data,
^id
),
where: fragment("(?)->>'type' = 'Like'", activity.data)
)
Repo.all(query)
end
def make_like_data(
%User{ap_id: ap_id} = actor,
%{data: %{"actor" => object_actor_id, "id" => id}} = object,
activity_id
) do
object_actor = User.get_cached_by_ap_id(object_actor_id)
to =
if Visibility.is_public?(object) do
[actor.follower_address, object.data["actor"]]
else
[object.data["actor"]]
end
cc =
(object.data["to"] ++ (object.data["cc"] || []))
|> List.delete(actor.ap_id)
|> List.delete(object_actor.follower_address)
data = %{
"type" => "Like",
"actor" => ap_id,
"object" => id,
"to" => to,
"cc" => cc,
"context" => object.data["context"]
}
if activity_id, do: Map.put(data, "id", activity_id), else: data
end
def update_element_in_object(property, element, object) do
with new_data <-
object.data
|> Map.put("#{property}_count", length(element))
|> Map.put("#{property}s", element),
changeset <- Changeset.change(object, data: new_data),
{:ok, object} <- Object.update_and_set_cache(changeset),
_ <- update_object_in_activities(object) do
{:ok, object}
end
end
def update_likes_in_object(likes, object) do
update_element_in_object("like", likes, object)
end
def add_like_to_object(%Activity{data: %{"actor" => actor}}, object) do
likes = if is_list(object.data["likes"]), do: object.data["likes"], else: []
with likes <- [actor | likes] |> Enum.uniq() do
update_likes_in_object(likes, object)
end
end
def remove_like_from_object(%Activity{data: %{"actor" => actor}}, object) do
likes = if is_list(object.data["likes"]), do: object.data["likes"], else: []
with likes <- likes |> List.delete(actor) do
update_likes_in_object(likes, object)
end
end
#### Follow-related helpers
@doc """
Updates a follow activity's state (for locked accounts).
"""
def update_follow_state(
%Activity{data: %{"actor" => actor, "object" => object, "state" => "pending"}} = activity,
state
) do
try do
Ecto.Adapters.SQL.query!(
Repo,
"UPDATE activities SET data = jsonb_set(data, '{state}', $1) WHERE data->>'type' = 'Follow' AND data->>'actor' = $2 AND data->>'object' = $3 AND data->>'state' = 'pending'",
[state, actor, object]
)
activity = Activity.get_by_id(activity.id)
{:ok, activity}
rescue
e ->
{:error, e}
end
end
def update_follow_state(%Activity{} = activity, state) do
with new_data <-
activity.data
|> Map.put("state", state),
changeset <- Changeset.change(activity, data: new_data),
{:ok, activity} <- Repo.update(changeset) do
{:ok, activity}
end
end
@doc """
Makes a follow activity data for the given follower and followed
"""
def make_follow_data(
%User{ap_id: follower_id},
%User{ap_id: followed_id} = _followed,
activity_id
) do
data = %{
"type" => "Follow",
"actor" => follower_id,
"to" => [followed_id],
"cc" => ["https://www.w3.org/ns/activitystreams#Public"],
"object" => followed_id,
"state" => "pending"
}
data = if activity_id, do: Map.put(data, "id", activity_id), else: data
data
end
def fetch_latest_follow(%User{ap_id: follower_id}, %User{ap_id: followed_id}) do
query =
from(
activity in Activity,
where:
fragment(
"? ->> 'type' = 'Follow'",
activity.data
),
where: activity.actor == ^follower_id,
# this is to use the index
where:
fragment(
"coalesce((?)->'object'->>'id', (?)->>'object') = ?",
activity.data,
activity.data,
^followed_id
),
order_by: [fragment("? desc nulls last", activity.id)],
limit: 1
)
Repo.one(query)
end
#### Announce-related helpers
@doc """
Retruns an existing announce activity if the notice has already been announced
"""
def get_existing_announce(actor, %{data: %{"id" => id}}) do
query =
from(
activity in Activity,
where: activity.actor == ^actor,
# this is to use the index
where:
fragment(
"coalesce((?)->'object'->>'id', (?)->>'object') = ?",
activity.data,
activity.data,
^id
),
where: fragment("(?)->>'type' = 'Announce'", activity.data)
)
Repo.one(query)
end
@doc """
Make announce activity data for the given actor and object
"""
# for relayed messages, we only want to send to subscribers
def make_announce_data(
%User{ap_id: ap_id} = user,
%Object{data: %{"id" => id}} = object,
activity_id,
false
) do
data = %{
"type" => "Announce",
"actor" => ap_id,
"object" => id,
"to" => [user.follower_address],
"cc" => [],
"context" => object.data["context"]
}
if activity_id, do: Map.put(data, "id", activity_id), else: data
end
def make_announce_data(
%User{ap_id: ap_id} = user,
%Object{data: %{"id" => id}} = object,
activity_id,
true
) do
data = %{
"type" => "Announce",
"actor" => ap_id,
"object" => id,
"to" => [user.follower_address, object.data["actor"]],
"cc" => ["https://www.w3.org/ns/activitystreams#Public"],
"context" => object.data["context"]
}
if activity_id, do: Map.put(data, "id", activity_id), else: data
end
@doc """
Make unannounce activity data for the given actor and object
"""
def make_unannounce_data(
%User{ap_id: ap_id} = user,
%Activity{data: %{"context" => context}} = activity,
activity_id
) do
data = %{
"type" => "Undo",
"actor" => ap_id,
"object" => activity.data,
"to" => [user.follower_address, activity.data["actor"]],
"cc" => ["https://www.w3.org/ns/activitystreams#Public"],
"context" => context
}
if activity_id, do: Map.put(data, "id", activity_id), else: data
end
def make_unlike_data(
%User{ap_id: ap_id} = user,
%Activity{data: %{"context" => context}} = activity,
activity_id
) do
data = %{
"type" => "Undo",
"actor" => ap_id,
"object" => activity.data,
"to" => [user.follower_address, activity.data["actor"]],
"cc" => ["https://www.w3.org/ns/activitystreams#Public"],
"context" => context
}
if activity_id, do: Map.put(data, "id", activity_id), else: data
end
def add_announce_to_object(
%Activity{
data: %{"actor" => actor, "cc" => ["https://www.w3.org/ns/activitystreams#Public"]}
},
object
) do
announcements =
if is_list(object.data["announcements"]), do: object.data["announcements"], else: []
with announcements <- [actor | announcements] |> Enum.uniq() do
update_element_in_object("announcement", announcements, object)
end
end
def add_announce_to_object(_, object), do: {:ok, object}
def remove_announce_from_object(%Activity{data: %{"actor" => actor}}, object) do
announcements =
if is_list(object.data["announcements"]), do: object.data["announcements"], else: []
with announcements <- announcements |> List.delete(actor) do
update_element_in_object("announcement", announcements, object)
end
end
#### Unfollow-related helpers
def make_unfollow_data(follower, followed, follow_activity, activity_id) do
data = %{
"type" => "Undo",
"actor" => follower.ap_id,
"to" => [followed.ap_id],
"object" => follow_activity.data
}
if activity_id, do: Map.put(data, "id", activity_id), else: data
end
#### Block-related helpers
def fetch_latest_block(%User{ap_id: blocker_id}, %User{ap_id: blocked_id}) do
query =
from(
activity in Activity,
where:
fragment(
"? ->> 'type' = 'Block'",
activity.data
),
where: activity.actor == ^blocker_id,
# this is to use the index
where:
fragment(
"coalesce((?)->'object'->>'id', (?)->>'object') = ?",
activity.data,
activity.data,
^blocked_id
),
order_by: [fragment("? desc nulls last", activity.id)],
limit: 1
)
Repo.one(query)
end
def make_block_data(blocker, blocked, activity_id) do
data = %{
"type" => "Block",
"actor" => blocker.ap_id,
"to" => [blocked.ap_id],
"object" => blocked.ap_id
}
if activity_id, do: Map.put(data, "id", activity_id), else: data
end
def make_unblock_data(blocker, blocked, block_activity, activity_id) do
data = %{
"type" => "Undo",
"actor" => blocker.ap_id,
"to" => [blocked.ap_id],
"object" => block_activity.data
}
if activity_id, do: Map.put(data, "id", activity_id), else: data
end
#### Create-related helpers
def make_create_data(params, additional) do
published = params.published || make_date()
%{
"type" => "Create",
"to" => params.to |> Enum.uniq(),
"actor" => params.actor.ap_id,
"object" => params.object,
"published" => published,
"context" => params.context
}
|> Map.merge(additional)
end
def make_answer_data(params, additional) do
%{
"type" => "Create",
"to" => params.to |> Enum.uniq(),
"actor" => params.actor.ap_id,
"context" => params.context
}
|> Map.merge(additional)
end
#### Flag-related helpers
def make_flag_data(params, additional) do
status_ap_ids =
Enum.map(params.statuses || [], fn
%Activity{} = act -> act.data["id"]
act when is_map(act) -> act["id"]
act when is_binary(act) -> act
end)
object = [params.account.ap_id] ++ status_ap_ids
%{
"type" => "Flag",
"actor" => params.actor.ap_id,
"content" => params.content,
"object" => object,
"context" => params.context
}
|> Map.merge(additional)
end
#### Question-related helpers
def make_question_data(params) do
object =
%{
"type" => "Question",
"attributedTo" => params.object_id,
"endTime" => params.expires,
+ "to" => params.to,
"replies" => %{
"type" => "Collection",
"totalItems" => 0,
"items" => []
}
}
|> Map.merge(maybe_multiple_answers(params.multiple, params.options))
%{
"type" => "Create",
"to" => params.to |> Enum.uniq(),
"actor" => params.actor.ap_id,
"object" => object
}
end
defp maybe_multiple_answers(true, choices), do: %{"anyOf" => choices}
defp maybe_multiple_answers(false, choices), do: %{"oneOf" => choices}
@doc """
Fetches the OrderedCollection/OrderedCollectionPage from `from`, limiting the amount of pages fetched after
the first one to `pages_left` pages.
If the amount of pages is higher than the collection has, it returns whatever was there.
"""
def fetch_ordered_collection(from, pages_left, acc \\ []) do
with {:ok, response} <- Tesla.get(from),
{:ok, collection} <- Poison.decode(response.body) do
case collection["type"] do
"OrderedCollection" ->
# If we've encountered the OrderedCollection and not the page,
# just call the same function on the page address
fetch_ordered_collection(collection["first"], pages_left)
"OrderedCollectionPage" ->
if pages_left > 0 do
# There are still more pages
if Map.has_key?(collection, "next") do
# There are still more pages, go deeper saving what we have into the accumulator
fetch_ordered_collection(
collection["next"],
pages_left - 1,
acc ++ collection["orderedItems"]
)
else
# No more pages left, just return whatever we already have
acc ++ collection["orderedItems"]
end
else
# Got the amount of pages needed, add them all to the accumulator
acc ++ collection["orderedItems"]
end
_ ->
{:error, "Not an OrderedCollection or OrderedCollectionPage"}
end
end
end
end

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