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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Chat.MessageReference do
   6   @moduledoc """
   7   A reference that builds a relation between an AP chat message that a user can see and whether it has been seen
   8   by them, or should be displayed to them. Used to build the chat view that is presented to the user.
   9   """
  10
  11   use Ecto.Schema
  12
  13   alias Pleroma.Chat
  14   alias Pleroma.Object
  15   alias Pleroma.Repo
  16
  17   import Ecto.Changeset
  18   import Ecto.Query
  19
  20   @primary_key {:id, FlakeId.Ecto.Type, autogenerate: true}
  21
  22   schema "chat_message_references" do
  23     belongs_to(:object, Object)
  24     belongs_to(:chat, Chat, type: FlakeId.Ecto.CompatType)
  25
  26     field(:unread, :boolean, default: true)
  27
  28     timestamps()
  29   end
  30
  31   def changeset(struct, params) do
  32     struct
  33     |> cast(params, [:object_id, :chat_id, :unread])
  34     |> validate_required([:object_id, :chat_id, :unread])
  35   end
  36
  37   def get_by_id(id) do
  38     __MODULE__
  39     |> Repo.get(id)
  40     |> Repo.preload(:object)
  41   end
  42
  43   def delete(cm_ref) do
  44     cm_ref
  45     |> Repo.delete()
  46   end
  47
  48   def delete_for_object(%{id: object_id}) do
  49     from(cr in __MODULE__,
  50       where: cr.object_id == ^object_id
  51     )
  52     |> Repo.delete_all()
  53   end
  54
  55   def for_chat_and_object(%{id: chat_id}, %{id: object_id}) do
  56     __MODULE__
  57     |> Repo.get_by(chat_id: chat_id, object_id: object_id)
  58     |> Repo.preload(:object)
  59   end
  60
  61   def for_chat_query(chat) do
  62     from(cr in __MODULE__,
  63       where: cr.chat_id == ^chat.id,
  64       order_by: [desc: :id],
  65       preload: [:object]
  66     )
  67   end
  68
  69   def last_message_for_chat(chat) do
  70     chat
  71     |> for_chat_query()
  72     |> limit(1)
  73     |> Repo.one()
  74   end
  75
  76   def create(chat, object, unread) do
  77     params = %{
  78       chat_id: chat.id,
  79       object_id: object.id,
  80       unread: unread
  81     }
  82
  83     %__MODULE__{}
  84     |> changeset(params)
  85     |> Repo.insert()
  86   end
  87
  88   def unread_count_for_chat(chat) do
  89     chat
  90     |> for_chat_query()
  91     |> where([cmr], cmr.unread == true)
  92     |> Repo.aggregate(:count)
  93   end
  94
  95   def mark_as_read(cm_ref) do
  96     cm_ref
  97     |> changeset(%{unread: false})
  98     |> Repo.update()
  99   end
 100
 101   def set_all_seen_for_chat(chat, last_read_id \\ nil) do
 102     query =
 103       chat
 104       |> for_chat_query()
 105       |> exclude(:order_by)
 106       |> exclude(:preload)
 107       |> where([cmr], cmr.unread == true)
 108
 109     if last_read_id do
 110       query
 111       |> where([cmr], cmr.id <= ^last_read_id)
 112     else
 113       query
 114     end
 115     |> Repo.update_all(set: [unread: false])
 116   end
 117 end