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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("participation.json", %{participation: participation, user: user}) do
  15     participation = Repo.preload(participation, conversation: :users)
  16
  17     last_activity_id =
  18       with nil <- participation.last_activity_id do
  19         ActivityPub.fetch_latest_activity_id_for_context(participation.conversation.ap_id, %{
  20           "user" => user,
  21           "blocking_user" => user
  22         })
  23       end
  24
  25     activity = Activity.get_by_id_with_object(last_activity_id)
  26
  27     last_status = StatusView.render("status.json", %{activity: activity, for: user})
  28
  29     # Conversations return all users except the current user.
  30     users =
  31       participation.conversation.users
  32       |> Enum.reject(&(&1.id == user.id))
  33
  34     accounts =
  35       AccountView.render("accounts.json", %{
  36         users: users,
  37         as: :user
  38       })
  39
  40     %{
  41       id: participation.id |> to_string(),
  42       accounts: accounts,
  43       unread: !participation.read,
  44       last_status: last_status
  45     }
  46   end
  47 end