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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.Conversation do
   6   alias Pleroma.Conversation.Participation
   7   alias Pleroma.Conversation.Participation.RecipientShip
   8   alias Pleroma.Repo
   9   alias Pleroma.User
  10   use Ecto.Schema
  11   import Ecto.Changeset
  12
  13   schema "conversations" do
  14     # This is the context ap id.
  15     field(:ap_id, :string)
  16     has_many(:participations, Participation)
  17     has_many(:users, through: [:participations, :user])
  18
  19     timestamps()
  20   end
  21
  22   def creation_cng(struct, params) do
  23     struct
  24     |> cast(params, [:ap_id])
  25     |> validate_required([:ap_id])
  26     |> unique_constraint(:ap_id)
  27   end
  28
  29   def create_for_ap_id(ap_id) do
  30     %__MODULE__{}
  31     |> creation_cng(%{ap_id: ap_id})
  32     |> Repo.insert(
  33       on_conflict: [set: [updated_at: NaiveDateTime.utc_now()]],
  34       returning: true,
  35       conflict_target: :ap_id
  36     )
  37   end
  38
  39   def get_for_ap_id(ap_id) do
  40     Repo.get_by(__MODULE__, ap_id: ap_id)
  41   end
  42
  43   def maybe_create_recipientships(participation, activity) do
  44     participation = Repo.preload(participation, :recipients)
  45
  46     if participation.recipients |> Enum.empty?() do
  47       recipients = User.get_all_by_ap_id(activity.recipients)
  48       RecipientShip.create(recipients, participation)
  49     end
  50   end
  51
  52   @doc """
  53   This will
  54   1. Create a conversation if there isn't one already
  55   2. Create a participation for all the people involved who don't have one already
  56   3. Bump all relevant participations to 'unread'
  57   """
  58   def create_or_bump_for(activity, opts \\ []) do
  59     with true <- Pleroma.Web.ActivityPub.Visibility.is_direct?(activity),
  60          "Create" <- activity.data["type"],
  61          object <- Pleroma.Object.normalize(activity),
  62          true <- object.data["type"] in ["Note", "Question"],
  63          ap_id when is_binary(ap_id) and byte_size(ap_id) > 0 <- object.data["context"] do
  64       {:ok, conversation} = create_for_ap_id(ap_id)
  65
  66       users = User.get_users_from_set(activity.recipients, false)
  67
  68       participations =
  69         Enum.map(users, fn user ->
  70           {:ok, participation} =
  71             Participation.create_for_user_and_conversation(user, conversation, opts)
  72
  73           maybe_create_recipientships(participation, activity)
  74           participation
  75         end)
  76
  77       {:ok,
  78        %{
  79          conversation
  80          | participations: participations
  81        }}
  82     else
  83       e -> {:error, e}
  84     end
  85   end
  86
  87   @doc """
  88   This is only meant to be run by a mix task. It creates conversations/participations for all direct messages in the database.
  89   """
  90   def bump_for_all_activities do
  91     stream =
  92       Pleroma.Web.ActivityPub.ActivityPub.fetch_direct_messages_query()
  93       |> Repo.stream()
  94
  95     Repo.transaction(
  96       fn ->
  97         stream
  98         |> Enum.each(fn a -> create_or_bump_for(a, read: true) end)
  99       end,
 100       timeout: :infinity
 101     )
 102   end
 103 end