86 lines
2.3 KiB
Elixir
86 lines
2.3 KiB
Elixir
defmodule Mobilizon.Federation.ActivityStream.Converter.Resource do
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@moduledoc """
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Resource converter.
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This module allows to convert resources from ActivityStream format to our own
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internal one, and back.
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"""
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alias Mobilizon.Actors.Actor
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alias Mobilizon.Federation.ActivityPub
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alias Mobilizon.Federation.ActivityStream.{Converter, Convertible}
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alias Mobilizon.Resources
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alias Mobilizon.Resources.Resource
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@behaviour Converter
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defimpl Convertible, for: Resource do
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alias Mobilizon.Federation.ActivityStream.Converter.Resource, as: ResourceConverter
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defdelegate model_to_as(resource), to: ResourceConverter
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end
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@doc """
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Convert an resource struct to an ActivityStream representation
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"""
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@impl Converter
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@spec model_to_as(Resource.t()) :: map
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def model_to_as(%Resource{actor: %Actor{url: actor_url}} = resource) do
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res = %{
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"type" => "Resource",
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"actor" => actor_url,
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"id" => resource.url,
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"name" => resource.title,
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"summary" => resource.summary
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# TODO add resource_url
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}
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# if parent do
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# Map.put(res, "parent", parent.url)
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# else
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# res
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# end
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end
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@doc """
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Converts an AP object data to our internal data structure.
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"""
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@impl Converter
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@spec as_to_model_data(map) :: {:ok, map} | {:error, any()}
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def as_to_model_data(%{"type" => "Resource", "actor" => actor_url} = object) do
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with {:ok, %Actor{id: actor_id} = actor} <-
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ActivityPub.get_or_fetch_actor_by_url(actor_url) do
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data = %{
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title: object["name"],
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summary: object["summary"],
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url: object["id"],
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actor_id: actor_id
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# parent_id: get_eventual_parent(object)
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# TODO add resource_url
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}
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{:ok, data}
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end
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end
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defp get_eventual_parent_id(%{"parent" => parent_url})
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when not is_nil(parent_url) do
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with %Resource{id: resource_id} = _resource <-
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Resources.get_resource_by_url(parent_url) do
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resource_id
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else
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nil ->
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with {:ok, %Resource{id: resource_id} = _resource} <-
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ActivityPub.fetch_object_from_url(parent_url) do
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resource_id
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else
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_ -> nil
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end
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_ ->
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nil
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end
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end
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defp get_eventual_parent_id(_), do: nil
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end
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