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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           invisible_conversation = Enum.any?(users, &User.blocks?(user, &1))
  71
  72           unless invisible_conversation do
  73             User.increment_unread_conversation_count(conversation, user)
  74           end
  75
  76           opts = Keyword.put(opts, :invisible_conversation, invisible_conversation)
  77
  78           {:ok, participation} =
  79             Participation.create_for_user_and_conversation(user, conversation, opts)
  80
  81           maybe_create_recipientships(participation, activity)
  82           participation
  83         end)
  84
  85       {:ok,
  86        %{
  87          conversation
  88          | participations: participations
  89        }}
  90     else
  91       e -> {:error, e}
  92     end
  93   end
  94
  95   @doc """
  96   This is only meant to be run by a mix task. It creates conversations/participations for all direct messages in the database.
  97   """
  98   def bump_for_all_activities do
  99     stream =
 100       Pleroma.Web.ActivityPub.ActivityPub.fetch_direct_messages_query()
 101       |> Repo.stream()
 102
 103     Repo.transaction(
 104       fn ->
 105         stream
 106         |> Enum.each(fn a -> create_or_bump_for(a, read: true) end)
 107       end,
 108       timeout: :infinity
 109     )
 110   end
 111 end