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Merge branch 'develop' of git.pleroma.social:pleroma/pleroma into feature/local-only-scope

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lain 2020-11-04 11:47:41 +01:00
commit c7bcbfbc1d
50 changed files with 1118 additions and 32 deletions
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13
lib/pleroma/activity.ex
View file

@ -14,6 +14,7 @@ defmodule Pleroma.Activity do
alias Pleroma.ReportNote
alias Pleroma.ThreadMute
alias Pleroma.User
alias Pleroma.Web.ActivityPub.ActivityPub
import Ecto.Changeset
import Ecto.Query
@ -155,6 +156,18 @@ defmodule Pleroma.Activity do
def get_bookmark(_, _), do: nil
def get_report(activity_id) do
opts = %{
type: "Flag",
skip_preload: true,
preload_report_notes: true
}
ActivityPub.fetch_activities_query([], opts)
|> where(id: ^activity_id)
|> Repo.one()
end
def change(struct, params \\ %{}) do
struct
|> cast(params, [:data, :recipients])

9
lib/pleroma/application.ex
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@ -168,7 +168,11 @@ defmodule Pleroma.Application do
build_cachex("web_resp", limit: 2500),
build_cachex("emoji_packs", expiration: emoji_packs_expiration(), limit: 10),
build_cachex("failed_proxy_url", limit: 2500),
build_cachex("banned_urls", default_ttl: :timer.hours(24 * 30), limit: 5_000)
build_cachex("banned_urls", default_ttl: :timer.hours(24 * 30), limit: 5_000),
build_cachex("chat_message_id_idempotency_key",
expiration: chat_message_id_idempotency_key_expiration(),
limit: 500_000
)
]
end
@ -178,6 +182,9 @@ defmodule Pleroma.Application do
defp idempotency_expiration,
do: expiration(default: :timer.seconds(6 * 60 * 60), interval: :timer.seconds(60))
defp chat_message_id_idempotency_key_expiration,
do: expiration(default: :timer.minutes(2), interval: :timer.seconds(60))
defp seconds_valid_interval,
do: :timer.seconds(Config.get!([Pleroma.Captcha, :seconds_valid]))

2
lib/pleroma/captcha/kocaptcha.ex
View file

@ -10,7 +10,7 @@ defmodule Pleroma.Captcha.Kocaptcha do
def new do
endpoint = Pleroma.Config.get!([__MODULE__, :endpoint])
case Tesla.get(endpoint <> "/new") do
case Pleroma.HTTP.get(endpoint <> "/new") do
{:error, _} ->
%{error: :kocaptcha_service_unavailable}

26
lib/pleroma/emails/user_email.ex
View file

@ -189,4 +189,30 @@ defmodule Pleroma.Emails.UserEmail do
Router.Helpers.subscription_url(Endpoint, :unsubscribe, token)
end
def backup_is_ready_email(backup, admin_user_id \\ nil) do
%{user: user} = Pleroma.Repo.preload(backup, :user)
download_url = Pleroma.Web.PleromaAPI.BackupView.download_url(backup)
html_body =
if is_nil(admin_user_id) do
"""
<p>You requested a full backup of your Pleroma account. It's ready for download:</p>
<p><a href="#{download_url}">#{download_url}</a></p>
"""
else
admin = Pleroma.Repo.get(User, admin_user_id)
"""
<p>Admin @#{admin.nickname} requested a full backup of your Pleroma account. It's ready for download:</p>
<p><a href="#{download_url}">#{download_url}</a></p>
"""
end
new()
|> to(recipient(user))
|> from(sender())
|> subject("Your account archive is ready")
|> html_body(html_body)
end
end

4
lib/pleroma/emoji/pack.ex
View file

@ -594,7 +594,7 @@ defmodule Pleroma.Emoji.Pack do
end
defp download_archive(url, sha) do
with {:ok, %{body: archive}} <- Tesla.get(url) do
with {:ok, %{body: archive}} <- Pleroma.HTTP.get(url) do
if Base.decode16!(sha) == :crypto.hash(:sha256, archive) do
{:ok, archive}
else
@ -617,7 +617,7 @@ defmodule Pleroma.Emoji.Pack do
end
defp update_sha_and_save_metadata(pack, data) do
with {:ok, %{body: zip}} <- Tesla.get(data[:"fallback-src"]),
with {:ok, %{body: zip}} <- Pleroma.HTTP.get(data[:"fallback-src"]),
:ok <- validate_has_all_files(pack, zip) do
fallback_sha = :sha256 |> :crypto.hash(zip) |> Base.encode16()

10
lib/pleroma/moderation_log.ex
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@ -655,6 +655,16 @@ defmodule Pleroma.ModerationLog do
"@#{actor_nickname} deleted chat message ##{subject_id}"
end
def get_log_entry_message(%ModerationLog{
data: %{
"actor" => %{"nickname" => actor_nickname},
"action" => "create_backup",
"subject" => %{"nickname" => user_nickname}
}
}) do
"@#{actor_nickname} requested account backup for @#{user_nickname}"
end
defp nicknames_to_string(nicknames) do
nicknames
|> Enum.map(&"@#{&1}")

258
lib/pleroma/user/backup.ex Normal file
View file

@ -0,0 +1,258 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.User.Backup do
use Ecto.Schema
import Ecto.Changeset
import Ecto.Query
import Pleroma.Web.Gettext
require Pleroma.Constants
alias Pleroma.Activity
alias Pleroma.Bookmark
alias Pleroma.Repo
alias Pleroma.User
alias Pleroma.Web.ActivityPub.ActivityPub
alias Pleroma.Web.ActivityPub.Transmogrifier
alias Pleroma.Web.ActivityPub.UserView
alias Pleroma.Workers.BackupWorker
schema "backups" do
field(:content_type, :string)
field(:file_name, :string)
field(:file_size, :integer, default: 0)
field(:processed, :boolean, default: false)
belongs_to(:user, User, type: FlakeId.Ecto.CompatType)
timestamps()
end
def create(user, admin_id \\ nil) do
with :ok <- validate_email_enabled(),
:ok <- validate_user_email(user),
:ok <- validate_limit(user, admin_id),
{:ok, backup} <- user |> new() |> Repo.insert() do
BackupWorker.process(backup, admin_id)
end
end
def new(user) do
rand_str = :crypto.strong_rand_bytes(32) |> Base.url_encode64(padding: false)
datetime = Calendar.NaiveDateTime.Format.iso8601_basic(NaiveDateTime.utc_now())
name = "archive-#{user.nickname}-#{datetime}-#{rand_str}.zip"
%__MODULE__{
user_id: user.id,
content_type: "application/zip",
file_name: name
}
end
def delete(backup) do
uploader = Pleroma.Config.get([Pleroma.Upload, :uploader])
with :ok <- uploader.delete_file(Path.join("backups", backup.file_name)) do
Repo.delete(backup)
end
end
defp validate_limit(_user, admin_id) when is_binary(admin_id), do: :ok
defp validate_limit(user, nil) do
case get_last(user.id) do
%__MODULE__{inserted_at: inserted_at} ->
days = Pleroma.Config.get([__MODULE__, :limit_days])
diff = Timex.diff(NaiveDateTime.utc_now(), inserted_at, :days)
if diff > days do
:ok
else
{:error,
dngettext(
"errors",
"Last export was less than a day ago",
"Last export was less than %{days} days ago",
days,
days: days
)}
end
nil ->
:ok
end
end
defp validate_email_enabled do
if Pleroma.Config.get([Pleroma.Emails.Mailer, :enabled]) do
:ok
else
{:error, dgettext("errors", "Backups require enabled email")}
end
end
defp validate_user_email(%User{email: nil}) do
{:error, dgettext("errors", "Email is required")}
end
defp validate_user_email(%User{email: email}) when is_binary(email), do: :ok
def get_last(user_id) do
__MODULE__
|> where(user_id: ^user_id)
|> order_by(desc: :id)
|> limit(1)
|> Repo.one()
end
def list(%User{id: user_id}) do
__MODULE__
|> where(user_id: ^user_id)
|> order_by(desc: :id)
|> Repo.all()
end
def remove_outdated(%__MODULE__{id: latest_id, user_id: user_id}) do
__MODULE__
|> where(user_id: ^user_id)
|> where([b], b.id != ^latest_id)
|> Repo.all()
|> Enum.each(&BackupWorker.delete/1)
end
def get(id), do: Repo.get(__MODULE__, id)
def process(%__MODULE__{} = backup) do
with {:ok, zip_file} <- export(backup),
{:ok, %{size: size}} <- File.stat(zip_file),
{:ok, _upload} <- upload(backup, zip_file) do
backup
|> cast(%{file_size: size, processed: true}, [:file_size, :processed])
|> Repo.update()
end
end
@files ['actor.json', 'outbox.json', 'likes.json', 'bookmarks.json']
def export(%__MODULE__{} = backup) do
backup = Repo.preload(backup, :user)
name = String.trim_trailing(backup.file_name, ".zip")
dir = dir(name)
with :ok <- File.mkdir(dir),
:ok <- actor(dir, backup.user),
:ok <- statuses(dir, backup.user),
:ok <- likes(dir, backup.user),
:ok <- bookmarks(dir, backup.user),
{:ok, zip_path} <- :zip.create(String.to_charlist(dir <> ".zip"), @files, cwd: dir),
{:ok, _} <- File.rm_rf(dir) do
{:ok, to_string(zip_path)}
end
end
def dir(name) do
dir = Pleroma.Config.get([__MODULE__, :dir]) || System.tmp_dir!()
Path.join(dir, name)
end
def upload(%__MODULE__{} = backup, zip_path) do
uploader = Pleroma.Config.get([Pleroma.Upload, :uploader])
upload = %Pleroma.Upload{
name: backup.file_name,
tempfile: zip_path,
content_type: backup.content_type,
path: Path.join("backups", backup.file_name)
}
with {:ok, _} <- Pleroma.Uploaders.Uploader.put_file(uploader, upload),
:ok <- File.rm(zip_path) do
{:ok, upload}
end
end
defp actor(dir, user) do
with {:ok, json} <-
UserView.render("user.json", %{user: user})
|> Map.merge(%{"likes" => "likes.json", "bookmarks" => "bookmarks.json"})
|> Jason.encode() do
File.write(Path.join(dir, "actor.json"), json)
end
end
defp write_header(file, name) do
IO.write(
file,
"""
{
"@context": "https://www.w3.org/ns/activitystreams",
"id": "#{name}.json",
"type": "OrderedCollection",
"orderedItems": [
"""
)
end
defp write(query, dir, name, fun) do
path = Path.join(dir, "#{name}.json")
with {:ok, file} <- File.open(path, [:write, :utf8]),
:ok <- write_header(file, name) do
total =
query
|> Pleroma.Repo.chunk_stream(100)
|> Enum.reduce(0, fn i, acc ->
with {:ok, data} <- fun.(i),
{:ok, str} <- Jason.encode(data),
:ok <- IO.write(file, str <> ",\n") do
acc + 1
else
_ -> acc
end
end)
with :ok <- :file.pwrite(file, {:eof, -2}, "\n],\n \"totalItems\": #{total}}") do
File.close(file)
end
end
end
defp bookmarks(dir, %{id: user_id} = _user) do
Bookmark
|> where(user_id: ^user_id)
|> join(:inner, [b], activity in assoc(b, :activity))
|> select([b, a], %{id: b.id, object: fragment("(?)->>'object'", a.data)})
|> write(dir, "bookmarks", fn a -> {:ok, a.object} end)
end
defp likes(dir, user) do
user.ap_id
|> Activity.Queries.by_actor()
|> Activity.Queries.by_type("Like")
|> select([like], %{id: like.id, object: fragment("(?)->>'object'", like.data)})
|> write(dir, "likes", fn a -> {:ok, a.object} end)
end
defp statuses(dir, user) do
opts =
%{}
|> Map.put(:type, ["Create", "Announce"])
|> Map.put(:actor_id, user.ap_id)
[
[Pleroma.Constants.as_public(), user.ap_id],
User.following(user),
Pleroma.List.memberships(user)
]
|> Enum.concat()
|> ActivityPub.fetch_activities_query(opts)
|> write(dir, "outbox", fn a ->
with {:ok, activity} <- Transmogrifier.prepare_outgoing(a.data) do
{:ok, Map.delete(activity, "@context")}
end
end)
end
end

8
lib/pleroma/web/activity_pub/side_effects.ex
View file

@ -187,7 +187,7 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
{:ok, notifications} = Notification.create_notifications(activity, do_send: false)
{:ok, _user} = ActivityPub.increase_note_count_if_public(user, object)
if in_reply_to = object.data["inReplyTo"] do
if in_reply_to = object.data["inReplyTo"] && object.data["type"] != "Answer" do
Object.increase_replies_count(in_reply_to)
end
@ -312,6 +312,12 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
{:ok, chat} = Chat.bump_or_create(user.id, other_user.ap_id)
{:ok, cm_ref} = MessageReference.create(chat, object, user.ap_id != actor.ap_id)
Cachex.put(
:chat_message_id_idempotency_key_cache,
cm_ref.id,
meta[:idempotency_key]
)
{
["user", "user:pleroma_chat"],
{user, %{cm_ref | chat: chat, object: object}}

11
lib/pleroma/web/admin_api/controllers/admin_api_controller.ex
View file

@ -26,7 +26,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
plug(
OAuthScopesPlug,
%{scopes: ["read:accounts"], admin: true}
when action in [:right_get, :show_user_credentials]
when action in [:right_get, :show_user_credentials, :create_backup]
)
plug(
@ -441,6 +441,15 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
json(conn, %{"status_visibility" => counters})
end
def create_backup(%{assigns: %{user: admin}} = conn, %{"nickname" => nickname}) do
with %User{} = user <- User.get_by_nickname(nickname),
{:ok, _} <- Pleroma.User.Backup.create(user, admin.id) do
ModerationLog.insert_log(%{actor: admin, subject: user, action: "create_backup"})
json(conn, "")
end
end
defp page_params(params) do
{
fetch_integer_param(params, "page", 1),

2
lib/pleroma/web/admin_api/controllers/report_controller.ex
View file

@ -38,7 +38,7 @@ defmodule Pleroma.Web.AdminAPI.ReportController do
end
def show(conn, %{id: id}) do
with %Activity{} = report <- Activity.get_by_id(id) do
with %Activity{} = report <- Activity.get_report(id) do
render(conn, "show.json", Report.extract_report_info(report))
else
_ -> {:error, :not_found}

79
lib/pleroma/web/api_spec/operations/pleroma_backup_operation.ex Normal file
View file

@ -0,0 +1,79 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ApiSpec.PleromaBackupOperation do
alias OpenApiSpex.Operation
alias OpenApiSpex.Schema
alias Pleroma.Web.ApiSpec.Schemas.ApiError
def open_api_operation(action) do
operation = String.to_existing_atom("#{action}_operation")
apply(__MODULE__, operation, [])
end
def index_operation do
%Operation{
tags: ["Backups"],
summary: "List backups",
security: [%{"oAuth" => ["read:account"]}],
operationId: "PleromaAPI.BackupController.index",
responses: %{
200 =>
Operation.response(
"An array of backups",
"application/json",
%Schema{
type: :array,
items: backup()
}
),
400 => Operation.response("Bad Request", "application/json", ApiError)
}
}
end
def create_operation do
%Operation{
tags: ["Backups"],
summary: "Create a backup",
security: [%{"oAuth" => ["read:account"]}],
operationId: "PleromaAPI.BackupController.create",
responses: %{
200 =>
Operation.response(
"An array of backups",
"application/json",
%Schema{
type: :array,
items: backup()
}
),
400 => Operation.response("Bad Request", "application/json", ApiError)
}
}
end
defp backup do
%Schema{
title: "Backup",
description: "Response schema for a backup",
type: :object,
properties: %{
inserted_at: %Schema{type: :string, format: :"date-time"},
content_type: %Schema{type: :string},
file_name: %Schema{type: :string},
file_size: %Schema{type: :integer},
processed: %Schema{type: :boolean}
},
example: %{
"content_type" => "application/zip",
"file_name" =>
"https://cofe.fe:4000/media/backups/archive-foobar-20200908T164207-Yr7vuT5Wycv-sN3kSN2iJ0k-9pMo60j9qmvRCdDqIew.zip",
"file_size" => 4105,
"inserted_at" => "2020-09-08T16:42:07.000Z",
"processed" => true
}
}
end
end

3
lib/pleroma/web/common_api.ex
View file

@ -46,7 +46,8 @@ defmodule Pleroma.Web.CommonAPI do
{_, {:ok, %Activity{} = activity, _meta}} <-
{:common_pipeline,
Pipeline.common_pipeline(create_activity_data,
local: true
local: true,
idempotency_key: opts[:idempotency_key]
)} do
{:ok, activity}
else

14
lib/pleroma/web/mastodon_api/views/conversation_view.ex
View file

@ -33,8 +33,15 @@ defmodule Pleroma.Web.MastodonAPI.ConversationView do
end
activity = Activity.get_by_id_with_object(last_activity_id)
# Conversations return all users except the current user.
users = Enum.reject(participation.recipients, &(&1.id == user.id))
# Conversations return all users except the current user,
# except when the current user is the only participant
users =
if length(participation.recipients) > 1 do
Enum.reject(participation.recipients, &(&1.id == user.id))
else
participation.recipients
end
%{
id: participation.id |> to_string(),
@ -43,7 +50,8 @@ defmodule Pleroma.Web.MastodonAPI.ConversationView do
last_status:
render(StatusView, "show.json",
activity: activity,
direct_conversation_id: participation.id
direct_conversation_id: participation.id,
for: user
)
}
end

28
lib/pleroma/web/pleroma_api/controllers/backup_controller.ex Normal file
View file

@ -0,0 +1,28 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.PleromaAPI.BackupController do
use Pleroma.Web, :controller
alias Pleroma.User.Backup
alias Pleroma.Web.Plugs.OAuthScopesPlug
action_fallback(Pleroma.Web.MastodonAPI.FallbackController)
plug(OAuthScopesPlug, %{scopes: ["read:accounts"]} when action in [:index, :create])
plug(OpenApiSpex.Plug.CastAndValidate, render_error: Pleroma.Web.ApiSpec.RenderError)
defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.PleromaBackupOperation
def index(%{assigns: %{user: user}} = conn, _params) do
backups = Backup.list(user)
render(conn, "index.json", backups: backups)
end
def create(%{assigns: %{user: user}} = conn, _params) do
with {:ok, _} <- Backup.create(user) do
backups = Backup.list(user)
render(conn, "index.json", backups: backups)
end
end
end

10
lib/pleroma/web/pleroma_api/controllers/chat_controller.ex
View file

@ -80,7 +80,8 @@ defmodule Pleroma.Web.PleromaAPI.ChatController do
%User{} = recipient <- User.get_cached_by_ap_id(chat.recipient),
{:ok, activity} <-
CommonAPI.post_chat_message(user, recipient, params[:content],
media_id: params[:media_id]
media_id: params[:media_id],
idempotency_key: idempotency_key(conn)
),
message <- Object.normalize(activity, false),
cm_ref <- MessageReference.for_chat_and_object(chat, message) do
@ -169,4 +170,11 @@ defmodule Pleroma.Web.PleromaAPI.ChatController do
|> render("show.json", chat: chat)
end
end
defp idempotency_key(conn) do
case get_req_header(conn, "idempotency-key") do
[key] -> key
_ -> nil
end
end
end

28
lib/pleroma/web/pleroma_api/views/backup_view.ex Normal file
View file

@ -0,0 +1,28 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.PleromaAPI.BackupView do
use Pleroma.Web, :view
alias Pleroma.User.Backup
alias Pleroma.Web.CommonAPI.Utils
def render("show.json", %{backup: %Backup{} = backup}) do
%{
content_type: backup.content_type,
url: download_url(backup),
file_size: backup.file_size,
processed: backup.processed,
inserted_at: Utils.to_masto_date(backup.inserted_at)
}
end
def render("index.json", %{backups: backups}) do
render_many(backups, __MODULE__, "show.json")
end
def download_url(%Backup{file_name: file_name}) do
Pleroma.Web.Endpoint.url() <> "/media/backups/" <> file_name
end
end

11
lib/pleroma/web/pleroma_api/views/chat/message_reference_view.ex
View file

@ -5,6 +5,7 @@
defmodule Pleroma.Web.PleromaAPI.Chat.MessageReferenceView do
use Pleroma.Web, :view
alias Pleroma.Maps
alias Pleroma.User
alias Pleroma.Web.CommonAPI.Utils
alias Pleroma.Web.MastodonAPI.StatusView
@ -37,6 +38,7 @@ defmodule Pleroma.Web.PleromaAPI.Chat.MessageReferenceView do
Pleroma.Web.RichMedia.Helpers.fetch_data_for_object(object)
)
}
|> put_idempotency_key()
end
def render("index.json", opts) do
@ -47,4 +49,13 @@ defmodule Pleroma.Web.PleromaAPI.Chat.MessageReferenceView do
Map.put(opts, :as, :chat_message_reference)
)
end
defp put_idempotency_key(data) do
with {:ok, idempotency_key} <- Cachex.get(:chat_message_id_idempotency_key_cache, data.id) do
data
|> Maps.put_if_present(:idempotency_key, idempotency_key)
else
_ -> data
end
end
end

5
lib/pleroma/web/router.ex
View file

@ -243,6 +243,8 @@ defmodule Pleroma.Web.Router do
get("/chats/:id", ChatController, :show)
get("/chats/:id/messages", ChatController, :messages)
delete("/chats/:id/messages/:message_id", ChatController, :delete_message)
post("/backups", AdminAPIController, :create_backup)
end
scope "/api/pleroma/emoji", Pleroma.Web.PleromaAPI do
@ -373,6 +375,9 @@ defmodule Pleroma.Web.Router do
put("/mascot", MascotController, :update)
post("/scrobble", ScrobbleController, :create)
get("/backups", BackupController, :index)
post("/backups", BackupController, :create)
end
scope [] do

54
lib/pleroma/workers/backup_worker.ex Normal file
View file

@ -0,0 +1,54 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Workers.BackupWorker do
use Oban.Worker, queue: :backup, max_attempts: 1
alias Oban.Job
alias Pleroma.User.Backup
def process(backup, admin_user_id \\ nil) do
%{"op" => "process", "backup_id" => backup.id, "admin_user_id" => admin_user_id}
|> new()
|> Oban.insert()
end
def schedule_deletion(backup) do
days = Pleroma.Config.get([Backup, :purge_after_days])
time = 60 * 60 * 24 * days
scheduled_at = Calendar.NaiveDateTime.add!(backup.inserted_at, time)
%{"op" => "delete", "backup_id" => backup.id}
|> new(scheduled_at: scheduled_at)
|> Oban.insert()
end
def delete(backup) do
%{"op" => "delete", "backup_id" => backup.id}
|> new()
|> Oban.insert()
end
def perform(%Job{
args: %{"op" => "process", "backup_id" => backup_id, "admin_user_id" => admin_user_id}
}) do
with {:ok, %Backup{} = backup} <-
backup_id |> Backup.get() |> Backup.process(),
{:ok, _job} <- schedule_deletion(backup),
:ok <- Backup.remove_outdated(backup),
{:ok, _} <-
backup
|> Pleroma.Emails.UserEmail.backup_is_ready_email(admin_user_id)
|> Pleroma.Emails.Mailer.deliver() do
{:ok, backup}
end
end
def perform(%Job{args: %{"op" => "delete", "backup_id" => backup_id}}) do
case Backup.get(backup_id) do
%Backup{} = backup -> Backup.delete(backup)
nil -> :ok
end
end
end