Change Channel to Source (#12)

* Ensure channel detail lookup doesn't download the video - oops

* Ran the needful migrations for replacing channels with sources

* got media source test back working

* channel tasks test

* Media indexing worker test

* media tests

* Got all tests working except controller tests

* got all tests working

* Renamed Channel struct to Source

* renamed ChannelTasks

* More renaming; renamed channel details module

* Removed Channel yt-dlp module, instead throwing things in the VideoCollection module

* Renamed what looks like the last of the outstanding data

lib/pinchflat/tasks/source_tasks.ex

@@ -0,0 +1,33 @@
+defmodule Pinchflat.Tasks.SourceTasks do
+  @moduledoc """
+  This module contains methods for managing tasks (workers) related to sources.
+  """
+
+  alias Pinchflat.Tasks
+  alias Pinchflat.MediaSource.Source
+  alias Pinchflat.Workers.MediaIndexingWorker
+
+  @doc """
+  Starts tasks for indexing a source's media.
+
+  Returns {:ok, :should_not_index} | {:ok, %Task{}}.
+  """
+  def kickoff_indexing_task(%Source{} = source) do
+    Tasks.delete_pending_tasks_for(source)
+
+    if source.index_frequency_minutes <= 0 do
+      {:ok, :should_not_index}
+    else
+      source
+      |> Map.take([:id])
+      # Schedule this one immediately, but future ones will be on an interval
+      |> MediaIndexingWorker.new()
+      |> Tasks.create_job_with_task(source)
+      |> case do
+        # This should never return {:error, :duplicate_job} since we just deleted
+        # any pending tasks. I'm being assertive about it so it's obvious if I'm wrong
+        {:ok, task} -> {:ok, task}
+      end
+    end
+  end
+end