spc-pleroma/lib/pleroma/chat.ex

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# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Chat do
use Ecto.Schema
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import Ecto.Changeset
import Ecto.Query
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alias Pleroma.Chat
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alias Pleroma.Repo
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alias Pleroma.User
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@moduledoc """
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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).
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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.
"""
@type t :: %__MODULE__{}
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@primary_key {:id, FlakeId.Ecto.CompatType, autogenerate: true}
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schema "chats" do
belongs_to(:user, User, type: FlakeId.Ecto.CompatType)
field(:recipient, :string)
timestamps()
end
def changeset(struct, params) do
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struct
|> cast(params, [:user_id, :recipient])
|> validate_change(:recipient, fn
:recipient, recipient ->
case User.get_cached_by_ap_id(recipient) do
nil -> [recipient: "must be an existing user"]
_ -> []
end
end)
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|> validate_required([:user_id, :recipient])
|> unique_constraint(:user_id, name: :chats_user_id_recipient_index)
end
@spec get_by_user_and_id(User.t(), Ecto.UUID.t()) ::
{:ok, t()} | {:error, :not_found}
def get_by_user_and_id(%User{id: user_id}, id) do
from(c in __MODULE__,
where: c.id == ^id,
where: c.user_id == ^user_id
)
|> Repo.find_resource()
end
@spec get_by_id(Ecto.UUID.t()) :: t() | nil
def get_by_id(id) do
Repo.get(__MODULE__, id)
end
@spec get(Ecto.UUID.t(), String.t()) :: t() | nil
def get(user_id, recipient) do
Repo.get_by(__MODULE__, user_id: user_id, recipient: recipient)
end
@spec get_or_create(Ecto.UUID.t(), String.t()) ::
{:ok, t()} | {:error, Ecto.Changeset.t()}
def get_or_create(user_id, recipient) do
%__MODULE__{}
|> changeset(%{user_id: user_id, recipient: recipient})
|> Repo.insert(
# Need to set something, otherwise we get nothing back at all
on_conflict: [set: [recipient: recipient]],
returning: true,
conflict_target: [:user_id, :recipient]
)
end
@spec bump_or_create(Ecto.UUID.t(), String.t()) ::
{:ok, t()} | {:error, Ecto.Changeset.t()}
def bump_or_create(user_id, recipient) do
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%__MODULE__{}
|> changeset(%{user_id: user_id, recipient: recipient})
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|> Repo.insert(
on_conflict: [set: [updated_at: NaiveDateTime.utc_now()]],
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returning: true,
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conflict_target: [:user_id, :recipient]
)
end
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@spec for_user_query(Ecto.UUID.t()) :: Ecto.Query.t()
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def for_user_query(user_id) do
from(c in Chat,
where: c.user_id == ^user_id,
order_by: [desc: c.updated_at]
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)
end
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end