[Performance] Asyncronously delete sources and media profiles (#277)

* [WIP] started on source deletion

* Removed unneeded test blocks

* Added marked_for_deletion_at to sources and media profiles

* Hooked up async deletion to media profiles as well

lib/pinchflat/sources/source.ex

@@ -35,6 +35,7 @@ defmodule Pinchflat.Sources.Source do
     title_filter_regex
     media_profile_id
     output_path_template_override
+    marked_for_deletion_at
   )a
 
   # Expensive API calls are made when a source is inserted/updated so
@@ -87,6 +88,8 @@ defmodule Pinchflat.Sources.Source do
     field :fanart_filepath, :string
     field :banner_filepath, :string
 
+    field :marked_for_deletion_at, :utc_datetime
+
     belongs_to :media_profile, MediaProfile
 
     has_one :metadata, SourceMetadata, on_replace: :update

lib/pinchflat/sources/source_deletion_worker.ex

@@ -0,0 +1,38 @@
+defmodule Pinchflat.Sources.SourceDeletionWorker do
+  @moduledoc false
+
+  use Oban.Worker,
+    queue: :local_data,
+    tags: ["sources", "local_data"]
+
+  require Logger
+
+  alias __MODULE__
+  alias Pinchflat.Sources
+
+  @doc """
+  Starts the source deletion worker. Does not attach it to a task like `kickoff_with_task/2`
+  since deletion also cancels all tasks for the source
+
+  Returns {:ok, %Task{}} | {:error, %Ecto.Changeset{}}
+  """
+  def kickoff(source, job_args \\ %{}, job_opts \\ []) do
+    %{id: source.id}
+    |> Map.merge(job_args)
+    |> SourceDeletionWorker.new(job_opts)
+    |> Oban.insert()
+  end
+
+  @doc """
+  Deletes a source and optionally deletes its files
+
+  Returns :ok
+  """
+  @impl Oban.Worker
+  def perform(%Oban.Job{args: %{"id" => source_id} = args}) do
+    delete_files = Map.get(args, "delete_files", false)
+    source = Sources.get_source!(source_id)
+
+    Sources.delete_source(source, delete_files: delete_files)
+  end
+end