121 lines
3.4 KiB
Elixir
121 lines
3.4 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
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alias Mobilizon.Events
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alias Mobilizon.Events.Event
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alias Mobilizon.Reports.Report
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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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"event_id" => (!is_nil(params["event"]) && params["event"].id) || nil,
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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 = [report.reported.url] ++ Enum.map(report.comments, fn comment -> comment.url end)
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object = if report.event, do: object ++ [report.event.url], else: object
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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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event <- find_event(objects),
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comments <- find_comments(objects, reported, event) 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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"event" => event,
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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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# Remove the reported actor and the event from the object list.
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@spec find_comments(list(String.t()), Actor.t() | nil, Event.t() | nil) :: list(Comment.t())
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defp find_comments(objects, reported, event) do
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objects
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|> Enum.filter(fn url ->
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!((!is_nil(reported) && url == reported.url) || (!is_nil(event) && event.url == url))
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end)
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|> Enum.map(&Discussions.get_comment_from_url/1)
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|> Enum.filter(& &1)
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end
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@spec find_event(list(String.t())) :: Event.t() | nil
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defp find_event(objects) do
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Enum.reduce_while(objects, nil, fn url, _ ->
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case Events.get_event_by_url(url) do
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%Event{} = event ->
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{:halt, event}
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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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end
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