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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Web.MastodonAPI.ConversationView do
   6   use Pleroma.Web, :view
   7
   8   alias Pleroma.Activity
   9   alias Pleroma.Repo
  10   alias Pleroma.Web.ActivityPub.ActivityPub
  11   alias Pleroma.Web.MastodonAPI.AccountView
  12   alias Pleroma.Web.MastodonAPI.StatusView
  13
  14   def render("participations.json", %{participations: participations, for: user}) do
  15     render_many(participations, __MODULE__, "participation.json", as: :participation, for: user)
  16   end
  17
  18   def render("participation.json", %{participation: participation, for: user}) do
  19     participation = Repo.preload(participation, conversation: [], recipients: [])
  20
  21     last_activity_id =
  22       with nil <- participation.last_activity_id do
  23         ActivityPub.fetch_latest_activity_id_for_context(participation.conversation.ap_id, %{
  24           "user" => user,
  25           "blocking_user" => user
  26         })
  27       end
  28
  29     activity = Activity.get_by_id_with_object(last_activity_id)
  30     # Conversations return all users except the current user.
  31     users = Enum.reject(participation.recipients, &(&1.id == user.id))
  32
  33     %{
  34       id: participation.id |> to_string(),
  35       accounts: render(AccountView, "index.json", users: users, as: :user),
  36       unread: !participation.read,
  37       last_status: render(StatusView, "show.json", activity: activity, for: user)
  38     }
  39   end
  40 end