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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.ScheduledActivity do
use Ecto.Schema
alias Ecto.Multi
alias Pleroma.Config
alias Pleroma.Repo
alias Pleroma.ScheduledActivity
alias Pleroma.User
alias Pleroma.Web.CommonAPI.Utils
alias Pleroma.Workers.ScheduledActivityWorker
import Ecto.Query
import Ecto.Changeset
@type t :: %__MODULE__{}
@min_offset :timer.minutes(5)
schema "scheduled_activities" do
belongs_to(:user, User, type: FlakeId.Ecto.CompatType)
field(:scheduled_at, :naive_datetime)
field(:params, :map)
timestamps()
end
def changeset(%ScheduledActivity{} = scheduled_activity, attrs) do
scheduled_activity
|> cast(attrs, [:scheduled_at, :params])
|> validate_required([:scheduled_at, :params])
|> validate_scheduled_at()
|> with_media_attachments()
end
defp with_media_attachments(
%{changes: %{params: %{"media_ids" => media_ids} = params}} = changeset
)
when is_list(media_ids) do
media_attachments = Utils.attachments_from_ids(%{media_ids: media_ids})
params =
params
|> Map.put("media_attachments", media_attachments)
|> Map.put("media_ids", media_ids)
put_change(changeset, :params, params)
end
defp with_media_attachments(changeset), do: changeset
def update_changeset(%ScheduledActivity{} = scheduled_activity, attrs) do
scheduled_activity
|> cast(attrs, [:scheduled_at])
|> validate_required([:scheduled_at])
|> validate_scheduled_at()
end
def validate_scheduled_at(changeset) do
validate_change(changeset, :scheduled_at, fn _, scheduled_at ->
cond do
not far_enough?(scheduled_at) ->
[scheduled_at: "must be at least 5 minutes from now"]
exceeds_daily_user_limit?(changeset.data.user_id, scheduled_at) ->
[scheduled_at: "daily limit exceeded"]
exceeds_total_user_limit?(changeset.data.user_id) ->
[scheduled_at: "total limit exceeded"]
true ->
[]
end
end)
end
def exceeds_daily_user_limit?(user_id, scheduled_at) do
ScheduledActivity
|> where(user_id: ^user_id)
|> where([sa], type(sa.scheduled_at, :date) == type(^scheduled_at, :date))
|> select([sa], count(sa.id))
|> Repo.one()
|> Kernel.>=(Config.get([ScheduledActivity, :daily_user_limit]))
end
def exceeds_total_user_limit?(user_id) do
ScheduledActivity
|> where(user_id: ^user_id)
|> select([sa], count(sa.id))
|> Repo.one()
|> Kernel.>=(Config.get([ScheduledActivity, :total_user_limit]))
end
def far_enough?(scheduled_at) when is_binary(scheduled_at) do
with {:ok, scheduled_at} <- Ecto.Type.cast(:naive_datetime, scheduled_at) do
far_enough?(scheduled_at)
else
_ -> false
end
end
def far_enough?(scheduled_at) do
now = NaiveDateTime.utc_now()
diff = NaiveDateTime.diff(scheduled_at, now, :millisecond)
diff > @min_offset
end
def new(%User{} = user, attrs) do
changeset(%ScheduledActivity{user_id: user.id}, attrs)
end
@doc """
Creates ScheduledActivity and add to queue to perform at scheduled_at date
"""
@spec create(User.t(), map()) :: {:ok, ScheduledActivity.t()} | {:error, Ecto.Changeset.t()}
def create(%User{} = user, attrs) do
Multi.new()
|> Multi.insert(:scheduled_activity, new(user, attrs))
|> maybe_add_jobs(Config.get([ScheduledActivity, :enabled]))
|> Repo.transaction()
|> transaction_response
end
defp maybe_add_jobs(multi, true) do
multi
|> Multi.run(:scheduled_activity_job, fn _repo, %{scheduled_activity: activity} ->
%{activity_id: activity.id}
|> ScheduledActivityWorker.new(scheduled_at: activity.scheduled_at)
|> Oban.insert()
end)
end
defp maybe_add_jobs(multi, _), do: multi
def get(%User{} = user, scheduled_activity_id) do
ScheduledActivity
|> where(user_id: ^user.id)
|> where(id: ^scheduled_activity_id)
|> Repo.one()
end
@spec update(ScheduledActivity.t(), map()) ::
{:ok, ScheduledActivity.t()} | {:error, Ecto.Changeset.t()}
def update(%ScheduledActivity{id: id} = scheduled_activity, attrs) do
with {:error, %Ecto.Changeset{valid?: true} = changeset} <-
{:error, update_changeset(scheduled_activity, attrs)} do
Multi.new()
|> Multi.update(:scheduled_activity, changeset)
|> Multi.update_all(:scheduled_job, job_query(id),
set: [scheduled_at: get_field(changeset, :scheduled_at)]
)
|> Repo.transaction()
|> transaction_response
end
end
@doc "Deletes a ScheduledActivity and linked jobs."
@spec delete(ScheduledActivity.t() | binary() | integer) ::
{:ok, ScheduledActivity.t()} | {:error, Ecto.Changeset.t()}
def delete(%ScheduledActivity{id: id} = scheduled_activity) do
Multi.new()
|> Multi.delete(:scheduled_activity, scheduled_activity, stale_error_field: :id)
|> Multi.delete_all(:jobs, job_query(id))
|> Repo.transaction()
|> transaction_response
end
def delete(id) when is_binary(id) or is_integer(id) do
delete(%__MODULE__{id: id})
end
defp transaction_response(result) do
case result do
{:ok, %{scheduled_activity: scheduled_activity}} ->
{:ok, scheduled_activity}
{:error, _, changeset, _} ->
{:error, changeset}
end
end
def for_user_query(%User{} = user) do
ScheduledActivity
|> where(user_id: ^user.id)
end
def due_activities(offset \\ 0) do
naive_datetime =
NaiveDateTime.utc_now()
|> NaiveDateTime.add(offset, :millisecond)
ScheduledActivity
|> where([sa], sa.scheduled_at < ^naive_datetime)
|> Repo.all()
end
def job_query(scheduled_activity_id) do
from(j in Oban.Job,
where: j.queue == "scheduled_activities",
where: fragment("args ->> 'activity_id' = ?::text", ^to_string(scheduled_activity_id))
)
end
end

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