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like_validator.ex
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# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.ObjectValidators.LikeValidator do
use Ecto.Schema
alias Pleroma.Object
alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes
alias Pleroma.Web.ActivityPub.Utils
import Ecto.Changeset
import Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
@primary_key false
embedded_schema do
quote do
unquote do
import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields
message_fields()
activity_fields()
end
end
field(:context, :string)
end
def cast_and_validate(data) do
data
|> cast_data()
|> validate_data()
end
def cast_data(data) do
data =
data
|> fix()
%__MODULE__{}
|> changeset(data)
end
def changeset(struct, data) do
struct
|> cast(data, __schema__(:fields))
end
defp fix(data) do
data =
data
|> CommonFixes.fix_actor()
|> CommonFixes.fix_activity_addressing()
with %Object{} = object <- Object.normalize(data["object"]) do
data
|> CommonFixes.fix_activity_context(object)
|> CommonFixes.fix_object_action_recipients(object)
else
_ -> data
end
end
defp validate_data(data_cng) do
data_cng
|> validate_inclusion(:type, ["Like"])
|> validate_required([:id, :type, :object, :actor, :context, :to, :cc])
|> validate_actor_presence()
|> validate_object_presence()
|> validate_existing_like()
end
defp validate_existing_like(%{changes: %{actor: actor, object: object}} = cng) do
if Utils.get_existing_like(actor, %{data: %{"id" => object}}) do
cng
|> add_error(:actor, "already liked this object")
|> add_error(:object, "already liked by this actor")
else
cng
end
end
defp validate_existing_like(cng), do: cng
end

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