147 lines
3.7 KiB
Elixir
147 lines
3.7 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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# Code based on CreateChatMessageValidator
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# NOTES
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# - doesn't embed, will only get the object id
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defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do
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use Ecto.Schema
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alias Pleroma.EctoType.ActivityPub.ObjectValidators
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alias Pleroma.Object
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alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes
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alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
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import Ecto.Changeset
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@primary_key false
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embedded_schema do
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field(:id, ObjectValidators.ObjectID, primary_key: true)
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field(:actor, ObjectValidators.ObjectID)
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field(:type, :string)
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field(:to, ObjectValidators.Recipients, default: [])
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field(:cc, ObjectValidators.Recipients, default: [])
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field(:object, ObjectValidators.ObjectID)
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field(:expires_at, ObjectValidators.DateTime)
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# Should be moved to object, done for CommonAPI.Utils.make_context
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field(:context, :string)
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end
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def cast_data(data, meta \\ []) do
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data = fix(data, meta)
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%__MODULE__{}
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|> changeset(data)
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end
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def cast_and_apply(data) do
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data
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|> cast_data
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|> apply_action(:insert)
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end
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def cast_and_validate(data, meta \\ []) do
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data
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|> cast_data(meta)
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|> validate_data(meta)
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end
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def changeset(struct, data) do
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struct
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|> cast(data, __schema__(:fields))
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end
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defp fix_context(data, meta) do
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if object = meta[:object_data] do
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Map.put_new(data, "context", object["context"])
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else
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data
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end
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end
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defp fix_addressing(data, meta) do
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if object = meta[:object_data] do
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data
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|> Map.put_new("to", object["to"] || [])
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|> Map.put_new("cc", object["cc"] || [])
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else
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data
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end
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end
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defp fix(data, meta) do
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data
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|> fix_context(meta)
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|> fix_addressing(meta)
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|> CommonFixes.fix_actor()
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end
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def validate_data(cng, meta \\ []) do
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cng
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|> validate_required([:actor, :type, :object])
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|> validate_inclusion(:type, ["Create"])
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|> CommonValidations.validate_actor_presence()
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|> CommonValidations.validate_any_presence([:to, :cc])
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|> validate_actors_match(meta)
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|> validate_context_match(meta)
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|> validate_object_nonexistence()
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|> validate_object_containment()
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end
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def validate_object_containment(cng) do
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actor = get_field(cng, :actor)
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cng
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|> validate_change(:object, fn :object, object_id ->
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%URI{host: object_id_host} = URI.parse(object_id)
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%URI{host: actor_host} = URI.parse(actor)
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if object_id_host == actor_host do
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[]
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else
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[{:object, "The host of the object id doesn't match with the host of the actor"}]
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end
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end)
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end
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def validate_object_nonexistence(cng) do
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cng
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|> validate_change(:object, fn :object, object_id ->
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if Object.get_cached_by_ap_id(object_id) do
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[{:object, "The object to create already exists"}]
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else
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[]
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end
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end)
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end
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def validate_actors_match(cng, meta) do
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attributed_to = meta[:object_data]["attributedTo"] || meta[:object_data]["actor"]
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cng
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|> validate_change(:actor, fn :actor, actor ->
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if actor == attributed_to do
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[]
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else
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[{:actor, "Actor doesn't match with object attributedTo"}]
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end
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end)
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end
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def validate_context_match(cng, %{object_data: %{"context" => object_context}}) do
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cng
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|> validate_change(:context, fn :context, context ->
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if context == object_context do
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[]
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else
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[{:context, "context field not matching between Create and object (#{object_context})"}]
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end
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end)
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end
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def validate_context_match(cng, _), do: cng
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end
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