114 lines
3.1 KiB
Elixir
114 lines
3.1 KiB
Elixir
defmodule Mobilizon.Federation.ActivityStream.Converter.Flag do
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@moduledoc """
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Flag converter.
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This module allows to convert reports from ActivityStream format to our own
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internal one, and back.
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Note: Reports are named Flag in AS.
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"""
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alias Mobilizon.Actors.Actor
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alias Mobilizon.Discussions.Comment
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alias Mobilizon.Events.Event
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alias Mobilizon.Reports.Report
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alias Mobilizon.Federation.ActivityPub
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alias Mobilizon.Federation.ActivityPub.Actor, as: ActivityPubActor
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alias Mobilizon.Federation.ActivityPub.Relay
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alias Mobilizon.Federation.ActivityStream.{Converter, Convertible}
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@behaviour Converter
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defimpl Convertible, for: Report do
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alias Mobilizon.Federation.ActivityStream.Converter.Flag, as: FlagConverter
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defdelegate model_to_as(report), to: FlagConverter
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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) :: map
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def as_to_model_data(object) do
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with params <- as_to_model(object) do
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%{
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"reporter_id" => params["reporter"].id,
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"uri" => params["uri"],
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"content" => params["content"],
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"reported_id" => params["reported"].id,
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"events" => params["events"],
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"comments" => params["comments"]
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}
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end
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end
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@doc """
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Convert an event struct to an ActivityStream representation
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"""
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@impl Converter
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@spec model_to_as(Report.t()) :: map
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def model_to_as(%Report{} = report) do
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object =
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[report.reported.url] ++
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Enum.map(report.comments, fn comment -> comment.url end) ++
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Enum.map(report.events, & &1.url)
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%{
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"type" => "Flag",
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"actor" => Relay.get_actor().url,
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"id" => report.url,
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"content" => report.content,
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"object" => object
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}
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end
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@spec as_to_model(map) :: map
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def as_to_model(%{"object" => objects} = object) do
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with {:ok, %Actor{} = reporter} <-
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ActivityPubActor.get_or_fetch_actor_by_url(object["actor"]),
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%Actor{} = reported <- find_reported(objects),
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%{events: events, comments: comments} <- find_events_and_comments(objects) do
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%{
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"reporter" => reporter,
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"uri" => object["id"],
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"content" => object["content"],
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"reported" => reported,
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"events" => events,
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"comments" => comments
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}
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end
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end
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@spec find_reported(list(String.t())) :: Actor.t() | nil
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defp find_reported(objects) do
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Enum.reduce_while(objects, nil, fn url, _ ->
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case ActivityPubActor.get_or_fetch_actor_by_url(url) do
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{:ok, %Actor{} = actor} ->
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{:halt, actor}
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_ ->
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{:cont, nil}
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end
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end)
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end
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defp find_events_and_comments(objects) do
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objects
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|> Enum.map(&ActivityPub.fetch_object_from_url/1)
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|> Enum.reduce(%{comments: [], events: []}, fn res, acc ->
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case res do
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{:ok, %Event{} = event} ->
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Map.put(acc, :events, [event | acc.events])
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{:ok, %Comment{} = comment} ->
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Map.put(acc, :comments, [comment | acc.comments])
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_ ->
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acc
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end
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end)
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end
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end
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