git.squeep.com Git - akkoma/blob - lib/pleroma/chat.ex

   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Chat do
   6   use Ecto.Schema
   7
   8   import Ecto.Changeset
   9   import Ecto.Query
  10
  11   alias Pleroma.Chat
  12   alias Pleroma.Repo
  13   alias Pleroma.User
  14
  15   @moduledoc """
  16   Chat keeps a reference to ChatMessage conversations between a user and an recipient. The recipient can be a user (for now) or a group (not implemented yet).
  17
  18   It is a helper only, to make it easy to display a list of chats with other people, ordered by last bump. The actual messages are retrieved by querying the recipients of the ChatMessages.
  19   """
  20
  21   @type t :: %__MODULE__{}
  22   @primary_key {:id, FlakeId.Ecto.CompatType, autogenerate: true}
  23
  24   schema "chats" do
  25     belongs_to(:user, User, type: FlakeId.Ecto.CompatType)
  26     field(:recipient, :string)
  27
  28     timestamps()
  29   end
  30
  31   def changeset(struct, params) do
  32     struct
  33     |> cast(params, [:user_id, :recipient])
  34     |> validate_change(:recipient, fn
  35       :recipient, recipient ->
  36         case User.get_cached_by_ap_id(recipient) do
  37           nil -> [recipient: "must be an existing user"]
  38           _ -> []
  39         end
  40     end)
  41     |> validate_required([:user_id, :recipient])
  42     |> unique_constraint(:user_id, name: :chats_user_id_recipient_index)
  43   end
  44
  45   @spec get_by_user_and_id(User.t(), FlakeId.Ecto.CompatType.t()) ::
  46           {:ok, t()} | {:error, :not_found}
  47   def get_by_user_and_id(%User{id: user_id}, id) do
  48     from(c in __MODULE__,
  49       where: c.id == ^id,
  50       where: c.user_id == ^user_id
  51     )
  52     |> Repo.find_resource()
  53   end
  54
  55   @spec get_by_id(FlakeId.Ecto.CompatType.t()) :: t() | nil
  56   def get_by_id(id) do
  57     Repo.get(__MODULE__, id)
  58   end
  59
  60   @spec get(FlakeId.Ecto.CompatType.t(), String.t()) :: t() | nil
  61   def get(user_id, recipient) do
  62     Repo.get_by(__MODULE__, user_id: user_id, recipient: recipient)
  63   end
  64
  65   @spec get_or_create(FlakeId.Ecto.CompatType.t(), String.t()) ::
  66           {:ok, t()} | {:error, Ecto.Changeset.t()}
  67   def get_or_create(user_id, recipient) do
  68     %__MODULE__{}
  69     |> changeset(%{user_id: user_id, recipient: recipient})
  70     |> Repo.insert(
  71       # Need to set something, otherwise we get nothing back at all
  72       on_conflict: [set: [recipient: recipient]],
  73       returning: true,
  74       conflict_target: [:user_id, :recipient]
  75     )
  76   end
  77
  78   @spec bump_or_create(FlakeId.Ecto.CompatType.t(), String.t()) ::
  79           {:ok, t()} | {:error, Ecto.Changeset.t()}
  80   def bump_or_create(user_id, recipient) do
  81     %__MODULE__{}
  82     |> changeset(%{user_id: user_id, recipient: recipient})
  83     |> Repo.insert(
  84       on_conflict: [set: [updated_at: NaiveDateTime.utc_now()]],
  85       returning: true,
  86       conflict_target: [:user_id, :recipient]
  87     )
  88   end
  89
  90   @spec for_user_query(FlakeId.Ecto.CompatType.t()) :: Ecto.Query.t()
  91   def for_user_query(user_id) do
  92     from(c in Chat,
  93       where: c.user_id == ^user_id,
  94       order_by: [desc: c.updated_at]
  95     )
  96   end
  97 end