Refactor modules into contexts (#78)

* [WIP] break out a few contexts, start refactoring fast index modules

* [WIP] more contexts, this time around slow indexing and downloads

* [WIP] got all tests passing

* [WIP] Added moduledocs

* Built a genserver to rename old jobs on boot

* Added a module naming check; moved things around

* Fixed specs

lib/pinchflat/profiles/profiles.ex

@@ -0,0 +1,74 @@
+defmodule Pinchflat.Profiles do
+  @moduledoc """
+  The Profiles context.
+  """
+
+  import Ecto.Query, warn: false
+
+  alias Pinchflat.Repo
+  alias Pinchflat.Sources
+  alias Pinchflat.Profiles.MediaProfile
+
+  @doc """
+  Returns the list of media_profiles.
+
+  Returns [%MediaProfile{}, ...]
+  """
+  def list_media_profiles do
+    Repo.all(MediaProfile)
+  end
+
+  @doc """
+  Gets a single media_profile.
+
+  Returns %MediaProfile{}. Raises `Ecto.NoResultsError` if the Media profile does not exist.
+  """
+  def get_media_profile!(id), do: Repo.get!(MediaProfile, id)
+
+  @doc """
+  Creates a media_profile.
+
+  Returns {:ok, %MediaProfile{}} | {:error, %Ecto.Changeset{}}
+  """
+  def create_media_profile(attrs) do
+    %MediaProfile{}
+    |> MediaProfile.changeset(attrs)
+    |> Repo.insert()
+  end
+
+  @doc """
+  Updates a media_profile.
+
+  Returns {:ok, %MediaProfile{}} | {:error, %Ecto.Changeset{}}
+  """
+  def update_media_profile(%MediaProfile{} = media_profile, attrs) do
+    media_profile
+    |> MediaProfile.changeset(attrs)
+    |> Repo.update()
+  end
+
+  @doc """
+  Deletes a media_profile, all its sources, and all their media items.
+  Can optionally delete the media files.
+
+  Returns {:ok, %MediaProfile{}} | {:error, %Ecto.Changeset{}}
+  """
+  def delete_media_profile(%MediaProfile{} = media_profile, opts \\ []) do
+    delete_files = Keyword.get(opts, :delete_files, false)
+
+    media_profile
+    |> Sources.list_sources_for()
+    |> Enum.each(fn source ->
+      Sources.delete_source(source, delete_files: delete_files)
+    end)
+
+    Repo.delete(media_profile)
+  end
+
+  @doc """
+  Returns `%Ecto.Changeset{}`
+  """
+  def change_media_profile(%MediaProfile{} = media_profile, attrs \\ %{}) do
+    MediaProfile.changeset(media_profile, attrs)
+  end
+end