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# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Conversation.Participation do
use Ecto.Schema
alias Pleroma.Conversation
alias Pleroma.Conversation.Participation.RecipientShip
alias Pleroma.Repo
alias Pleroma.User
alias Pleroma.Web.ActivityPub.ActivityPub
import Ecto.Changeset
import Ecto.Query
@type t :: %__MODULE__{}
schema "conversation_participations" do
belongs_to(:user, User, type: FlakeId.Ecto.CompatType)
belongs_to(:conversation, Conversation)
field(:read, :boolean, default: false)
field(:last_activity_id, FlakeId.Ecto.CompatType, virtual: true)
has_many(:recipient_ships, RecipientShip)
has_many(:recipients, through: [:recipient_ships, :user])
timestamps()
end
def creation_cng(struct, params) do
struct
|> cast(params, [:user_id, :conversation_id, :read])
|> validate_required([:user_id, :conversation_id])
end
def create_for_user_and_conversation(user, conversation, opts \\ []) do
read = !!opts[:read]
invisible_conversation = !!opts[:invisible_conversation]
update_on_conflict =
if(invisible_conversation, do: [], else: [read: read])
|> Keyword.put(:updated_at, NaiveDateTime.utc_now())
%__MODULE__{}
|> creation_cng(%{
user_id: user.id,
conversation_id: conversation.id,
read: invisible_conversation || read
})
|> Repo.insert(
on_conflict: [set: update_on_conflict],
returning: true,
conflict_target: [:user_id, :conversation_id]
)
end
def read_cng(struct, params) do
struct
|> cast(params, [:read])
|> validate_required([:read])
end
def mark_as_read(%User{} = user, %Conversation{} = conversation) do
with %__MODULE__{} = participation <- for_user_and_conversation(user, conversation) do
mark_as_read(participation)
end
end
def mark_as_read(%__MODULE__{} = participation) do
participation
|> change(read: true)
|> Repo.update()
end
def mark_all_as_read(%User{local: true} = user, %User{} = target_user) do
target_conversation_ids =
__MODULE__
|> where([p], p.user_id == ^target_user.id)
|> select([p], p.conversation_id)
|> Repo.all()
__MODULE__
|> where([p], p.user_id == ^user.id)
|> where([p], p.conversation_id in ^target_conversation_ids)
|> update([p], set: [read: true])
|> Repo.update_all([])
{:ok, user, []}
end
def mark_all_as_read(%User{} = user, %User{}), do: {:ok, user, []}
def mark_all_as_read(%User{} = user) do
{_, participations} =
__MODULE__
|> where([p], p.user_id == ^user.id)
|> where([p], not p.read)
|> update([p], set: [read: true])
|> select([p], p)
|> Repo.update_all([])
{:ok, user, participations}
end
def mark_as_unread(participation) do
participation
|> read_cng(%{read: false})
|> Repo.update()
end
def for_user(user, params \\ %{}) do
from(p in __MODULE__,
where: p.user_id == ^user.id,
order_by: [desc: p.updated_at],
preload: [conversation: [:users]]
)
|> restrict_recipients(user, params)
|> Pleroma.Pagination.fetch_paginated(params)
end
def restrict_recipients(query, user, %{recipients: user_ids}) do
user_binary_ids =
[user.id | user_ids]
|> Enum.uniq()
|> User.binary_id()
conversation_subquery =
__MODULE__
|> group_by([p], p.conversation_id)
|> having(
[p],
count(p.user_id) == ^length(user_binary_ids) and
fragment("array_agg(?) @> ?", p.user_id, ^user_binary_ids)
)
|> select([p], %{id: p.conversation_id})
query
|> join(:inner, [p], c in subquery(conversation_subquery), on: p.conversation_id == c.id)
end
def restrict_recipients(query, _, _), do: query
def for_user_and_conversation(user, conversation) do
from(p in __MODULE__,
where: p.user_id == ^user.id,
where: p.conversation_id == ^conversation.id
)
|> Repo.one()
end
def for_user_with_last_activity_id(user, params \\ %{}) do
for_user(user, params)
|> Enum.map(fn participation ->
activity_id =
ActivityPub.fetch_latest_direct_activity_id_for_context(
participation.conversation.ap_id,
%{
user: user,
blocking_user: user
}
)
%{
participation
| last_activity_id: activity_id
}
end)
|> Enum.reject(&is_nil(&1.last_activity_id))
end
def get(_, _ \\ [])
def get(nil, _), do: nil
def get(id, params) do
query =
if preload = params[:preload] do
from(p in __MODULE__,
preload: ^preload
)
else
__MODULE__
end
Repo.get(query, id)
end
def set_recipients(participation, user_ids) do
user_ids =
[participation.user_id | user_ids]
|> Enum.uniq()
Repo.transaction(fn ->
query =
from(r in RecipientShip,
where: r.participation_id == ^participation.id
)
Repo.delete_all(query)
users =
from(u in User,
where: u.id in ^user_ids
)
|> Repo.all()
RecipientShip.create(users, participation)
:ok
end)
{:ok, Repo.preload(participation, :recipients, force: true)}
end
@spec unread_count(User.t()) :: integer()
def unread_count(%User{id: user_id}) do
from(q in __MODULE__, where: q.user_id == ^user_id and q.read == false)
|> Repo.aggregate(:count, :id)
end
def unread_conversation_count_for_user(user) do
from(p in __MODULE__,
where: p.user_id == ^user.id,
where: not p.read,
select: %{count: count(p.id)}
)
end
def delete(%__MODULE__{} = participation) do
Repo.delete(participation)
end
end

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