# Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations do
alias Pleroma.Object
alias Pleroma.User
- def validate_actor_presence(cng, field_name \\ :actor) do
+ def validate_any_presence(cng, fields) do
+ non_empty =
+ fields
+ |> Enum.map(fn field -> get_field(cng, field) end)
+ |> Enum.any?(fn
+ [] -> false
+ _ -> true
+ end)
+
+ if non_empty do
+ cng
+ else
+ fields
+ |> Enum.reduce(cng, fn field, cng ->
+ cng
+ |> add_error(field, "none of #{inspect(fields)} present")
+ end)
+ end
+ end
+
+ def validate_actor_presence(cng, options \\ []) do
+ field_name = Keyword.get(options, :field_name, :actor)
+
cng
|> validate_change(field_name, fn field_name, actor ->
- if User.get_cached_by_ap_id(actor) do
- []
- else
- [{field_name, "can't find user"}]
+ case User.get_cached_by_ap_id(actor) do
+ %User{is_active: false} ->
+ [{field_name, "user is deactivated"}]
+
+ %User{} ->
+ []
+
+ _ ->
+ [{field_name, "can't find user"}]
end
end)
end
- def validate_object_presence(cng, field_name \\ :object) do
+ def validate_object_presence(cng, options \\ []) do
+ field_name = Keyword.get(options, :field_name, :object)
+ allowed_types = Keyword.get(options, :allowed_types, false)
+
cng
- |> validate_change(field_name, fn field_name, object ->
- if Object.get_cached_by_ap_id(object) || Activity.get_by_ap_id(object) do
- []
- else
- [{field_name, "can't find object"}]
+ |> validate_change(field_name, fn field_name, object_id ->
+ object = Object.get_cached_by_ap_id(object_id) || Activity.get_by_ap_id(object_id)
+
+ cond do
+ !object ->
+ [{field_name, "can't find object"}]
+
+ object && allowed_types && object.data["type"] not in allowed_types ->
+ [{field_name, "object not in allowed types"}]
+
+ true ->
+ []
end
end)
end
+
+ def validate_object_or_user_presence(cng, options \\ []) do
+ field_name = Keyword.get(options, :field_name, :object)
+ options = Keyword.put(options, :field_name, field_name)
+
+ actor_cng =
+ cng
+ |> validate_actor_presence(options)
+
+ object_cng =
+ cng
+ |> validate_object_presence(options)
+
+ if actor_cng.valid?, do: actor_cng, else: object_cng
+ end
+
+ def validate_host_match(cng, fields \\ [:id, :actor]) do
+ if same_domain?(cng, fields) do
+ cng
+ else
+ fields
+ |> Enum.reduce(cng, fn field, cng ->
+ cng
+ |> add_error(field, "hosts of #{inspect(fields)} aren't matching")
+ end)
+ end
+ end
+
+ def validate_fields_match(cng, fields) do
+ if map_unique?(cng, fields) do
+ cng
+ else
+ fields
+ |> Enum.reduce(cng, fn field, cng ->
+ cng
+ |> add_error(field, "Fields #{inspect(fields)} aren't matching")
+ end)
+ end
+ end
+
+ defp map_unique?(cng, fields, func \\ & &1) do
+ Enum.reduce_while(fields, nil, fn field, acc ->
+ value =
+ cng
+ |> get_field(field)
+ |> func.()
+
+ case {value, acc} do
+ {value, nil} -> {:cont, value}
+ {value, value} -> {:cont, value}
+ _ -> {:halt, false}
+ end
+ end)
+ end
+
+ def same_domain?(cng, fields \\ [:actor, :object]) do
+ map_unique?(cng, fields, fn value -> URI.parse(value).host end)
+ end
+
+ # This figures out if a user is able to create, delete or modify something
+ # based on the domain and superuser status
+ def validate_modification_rights(cng) do
+ actor = User.get_cached_by_ap_id(get_field(cng, :actor))
+
+ if User.superuser?(actor) || same_domain?(cng) do
+ cng
+ else
+ cng
+ |> add_error(:actor, "is not allowed to modify object")
+ end
+ end
end