151 lines
4.2 KiB
Elixir
151 lines
4.2 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations do
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import Ecto.Changeset
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alias Pleroma.Activity
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alias Pleroma.Object
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alias Pleroma.User
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@spec validate_any_presence(Ecto.Changeset.t(), [atom()]) :: Ecto.Changeset.t()
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def validate_any_presence(cng, fields) do
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non_empty =
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fields
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|> Enum.map(fn field -> get_field(cng, field) end)
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|> Enum.any?(fn
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nil -> false
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[] -> false
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_ -> true
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end)
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if non_empty do
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cng
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else
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fields
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|> Enum.reduce(cng, fn field, cng ->
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cng
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|> add_error(field, "none of #{inspect(fields)} present")
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end)
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end
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end
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@spec validate_actor_presence(Ecto.Changeset.t(), keyword()) :: Ecto.Changeset.t()
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def validate_actor_presence(cng, options \\ []) do
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field_name = Keyword.get(options, :field_name, :actor)
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cng
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|> validate_change(field_name, fn field_name, actor ->
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case User.get_cached_by_ap_id(actor) do
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%User{is_active: false} ->
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[{field_name, "user is deactivated"}]
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%User{} ->
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[]
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_ ->
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[{field_name, "can't find user"}]
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end
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end)
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end
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@spec validate_object_presence(Ecto.Changeset.t(), keyword()) :: Ecto.Changeset.t()
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def validate_object_presence(cng, options \\ []) do
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field_name = Keyword.get(options, :field_name, :object)
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allowed_types = Keyword.get(options, :allowed_types, false)
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cng
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|> validate_change(field_name, fn field_name, object_id ->
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object = Object.get_cached_by_ap_id(object_id) || Activity.get_by_ap_id(object_id)
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cond do
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!object ->
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[{field_name, "can't find object"}]
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object && allowed_types && object.data["type"] not in allowed_types ->
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[{field_name, "object not in allowed types"}]
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true ->
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[]
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end
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end)
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end
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@spec validate_object_or_user_presence(Ecto.Changeset.t(), keyword()) :: Ecto.Changeset.t()
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def validate_object_or_user_presence(cng, options \\ []) do
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field_name = Keyword.get(options, :field_name, :object)
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options = Keyword.put(options, :field_name, field_name)
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actor_cng =
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cng
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|> validate_actor_presence(options)
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object_cng =
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cng
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|> validate_object_presence(options)
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if actor_cng.valid?, do: actor_cng, else: object_cng
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end
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@spec validate_host_match(Ecto.Changeset.t(), [atom()]) :: Ecto.Changeset.t()
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def validate_host_match(cng, fields \\ [:id, :actor]) do
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if same_domain?(cng, fields) do
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cng
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else
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fields
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|> Enum.reduce(cng, fn field, cng ->
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cng
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|> add_error(field, "hosts of #{inspect(fields)} aren't matching")
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end)
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end
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end
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@spec validate_fields_match(Ecto.Changeset.t(), [atom()]) :: Ecto.Changeset.t()
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def validate_fields_match(cng, fields) do
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if map_unique?(cng, fields) do
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cng
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else
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fields
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|> Enum.reduce(cng, fn field, cng ->
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cng
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|> add_error(field, "Fields #{inspect(fields)} aren't matching")
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end)
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end
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end
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defp map_unique?(cng, fields, func \\ & &1) do
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Enum.reduce_while(fields, nil, fn field, acc ->
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value =
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cng
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|> get_field(field)
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|> func.()
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case {value, acc} do
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{value, nil} -> {:cont, value}
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{value, value} -> {:cont, value}
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_ -> {:halt, false}
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end
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end)
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end
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@spec same_domain?(Ecto.Changeset.t(), [atom()]) :: boolean()
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def same_domain?(cng, fields \\ [:actor, :object]) do
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map_unique?(cng, fields, fn value -> URI.parse(value).host end)
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end
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# This figures out if a user is able to create, delete or modify something
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# based on the domain and superuser status
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@spec validate_modification_rights(Ecto.Changeset.t(), atom()) :: Ecto.Changeset.t()
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def validate_modification_rights(cng, privilege) do
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actor = User.get_cached_by_ap_id(get_field(cng, :actor))
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if User.privileged?(actor, privilege) || same_domain?(cng) do
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cng
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else
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cng
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|> add_error(:actor, "is not allowed to modify object")
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end
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end
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end
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