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# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Chat.MessageReference do
@moduledoc """
A reference that builds a relation between an AP chat message that a user can see and whether it has been seen
by them, or should be displayed to them. Used to build the chat view that is presented to the user.
"""
use Ecto.Schema
alias Pleroma.Chat
alias Pleroma.Object
alias Pleroma.Repo
import Ecto.Changeset
import Ecto.Query
@primary_key {:id, FlakeId.Ecto.Type, autogenerate: true}
schema "chat_message_references" do
belongs_to(:object, Object)
belongs_to(:chat, Chat, type: FlakeId.Ecto.CompatType)
field(:unread, :boolean, default: true)
timestamps()
end
def changeset(struct, params) do
struct
|> cast(params, [:object_id, :chat_id, :unread])
|> validate_required([:object_id, :chat_id, :unread])
end
def get_by_id(id) do
__MODULE__
|> Repo.get(id)
|> Repo.preload(:object)
end
def delete(cm_ref) do
cm_ref
|> Repo.delete()
end
def delete_for_object(%{id: object_id}) do
from(cr in __MODULE__,
where: cr.object_id == ^object_id
)
|> Repo.delete_all()
end
def for_chat_and_object(%{id: chat_id}, %{id: object_id}) do
__MODULE__
|> Repo.get_by(chat_id: chat_id, object_id: object_id)
|> Repo.preload(:object)
end
def for_chat_query(chat) do
from(cr in __MODULE__,
where: cr.chat_id == ^chat.id,
order_by: [desc: :id],
preload: [:object]
)
end
def last_message_for_chat(chat) do
chat
|> for_chat_query()
|> limit(1)
|> Repo.one()
end
def create(chat, object, unread) do
params = %{
chat_id: chat.id,
object_id: object.id,
unread: unread
}
%__MODULE__{}
|> changeset(params)
|> Repo.insert()
end
def unread_count_for_chat(chat) do
chat
|> for_chat_query()
|> where([cmr], cmr.unread == true)
|> Repo.aggregate(:count)
end
def mark_as_read(cm_ref) do
cm_ref
|> changeset(%{unread: false})
|> Repo.update()
end
def set_all_seen_for_chat(chat, last_read_id \\ nil) do
query =
chat
|> for_chat_query()
|> exclude(:order_by)
|> exclude(:preload)
|> where([cmr], cmr.unread == true)
if last_read_id do
query
|> where([cmr], cmr.id <= ^last_read_id)
else
query
end
|> Repo.update_all(set: [unread: false])
end
end

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