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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 do
use Ecto.Schema
import Ecto.Changeset
import Ecto.Query
alias Pleroma.Object
alias Pleroma.Repo
alias Pleroma.User
@moduledoc """
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).
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.
"""
schema "chats" do
belongs_to(:user, User, type: FlakeId.Ecto.CompatType)
field(:recipient, :string)
field(:unread, :integer, default: 0, read_after_writes: true)
timestamps()
end
def last_message_for_chat(chat) do
messages_for_chat_query(chat)
|> order_by(desc: :id)
|> limit(1)
|> Repo.one()
end
def messages_for_chat_query(chat) do
chat =
chat
|> Repo.preload(:user)
from(o in Object,
where: fragment("?->>'type' = ?", o.data, "ChatMessage"),
where:
fragment(
"""
(?->>'actor' = ? and ?->'to' = ?)
OR (?->>'actor' = ? and ?->'to' = ?)
""",
o.data,
^chat.user.ap_id,
o.data,
^[chat.recipient],
o.data,
^chat.recipient,
o.data,
^[chat.user.ap_id]
)
)
end
def creation_cng(struct, params) do
struct
|> cast(params, [:user_id, :recipient, :unread])
|> validate_change(:recipient, fn
:recipient, recipient ->
case User.get_cached_by_ap_id(recipient) do
nil -> [recipient: "must be an existing user"]
_ -> []
end
end)
|> validate_required([:user_id, :recipient])
|> unique_constraint(:user_id, name: :chats_user_id_recipient_index)
end
def get(user_id, recipient) do
__MODULE__
|> Repo.get_by(user_id: user_id, recipient: recipient)
end
def get_or_create(user_id, recipient) do
%__MODULE__{}
|> creation_cng(%{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
def bump_or_create(user_id, recipient) do
%__MODULE__{}
|> creation_cng(%{user_id: user_id, recipient: recipient, unread: 1})
|> Repo.insert(
on_conflict: [set: [updated_at: NaiveDateTime.utc_now()], inc: [unread: 1]],
conflict_target: [:user_id, :recipient]
)
end
def mark_as_read(chat) do
chat
|> change(%{unread: 0})
|> Repo.update()
end
end
|
