[Enhancement] Allow overriding output templates on a per-source basis (#179)

* Added output path override to table and download option builder

* Added output template override to UI

lib/pinchflat/downloading/download_option_builder.ex

@@ -3,6 +3,7 @@ defmodule Pinchflat.Downloading.DownloadOptionBuilder do
   Builds the options for yt-dlp to download media based on the given media profile.
   """
 
+  alias Pinchflat.Sources
   alias Pinchflat.Sources.Source
   alias Pinchflat.Media.MediaItem
   alias Pinchflat.Downloading.OutputPathBuilder
@@ -30,12 +31,12 @@ defmodule Pinchflat.Downloading.DownloadOptionBuilder do
 
   @doc """
   Builds the output path for yt-dlp to download media based on the given source's
-  media profile.
+  media profile. Uses the source's override output path template if it exists.
 
   Returns binary()
   """
   def build_output_path_for(%Source{} = source_with_preloads) do
-    output_path_template = source_with_preloads.media_profile.output_path_template
+    output_path_template = Sources.output_path_template(source_with_preloads)
 
     build_output_path(output_path_template, source_with_preloads)
   end
@@ -184,7 +185,7 @@ defmodule Pinchflat.Downloading.DownloadOptionBuilder do
   # It's dependent on the output_path_template being a string ending `.{{ ext }}`
   # (or equivalent), but that's validated by the MediaProfile schema.
   defp determine_thumbnail_location(media_item_with_preloads) do
-    output_path_template = media_item_with_preloads.source.media_profile.output_path_template
+    output_path_template = Sources.output_path_template(media_item_with_preloads.source)
 
     output_path_template
     |> String.split(~r{\.}, include_captures: true)

lib/pinchflat/profiles/media_profile.ex

@@ -80,7 +80,8 @@ defmodule Pinchflat.Profiles.MediaProfile do
     |> unique_constraint(:name)
   end
 
-  defp ext_regex do
+  @doc false
+  def ext_regex do
     ~r/\.({{ ?ext ?}}|%\( ?ext ?\)[sS])$/
   end
 end

lib/pinchflat/sources/source.ex

@@ -32,6 +32,7 @@ defmodule Pinchflat.Sources.Source do
     retention_period_days
     title_filter_regex
     media_profile_id
+    output_path_template_override
   )a
 
   # Expensive API calls are made when a source is inserted/updated so
@@ -76,6 +77,7 @@ defmodule Pinchflat.Sources.Source do
     field :retention_period_days, :integer
     field :original_url, :string
     field :title_filter_regex, :string
+    field :output_path_template_override, :string
 
     field :series_directory, :string
     field :nfo_filepath, :string
@@ -109,6 +111,8 @@ defmodule Pinchflat.Sources.Source do
     |> dynamic_default(:uuid, fn _ -> Ecto.UUID.generate() end)
     |> validate_required(required_fields)
     |> validate_number(:retention_period_days, greater_than_or_equal_to: 0)
+    # Ensures it ends with `.{{ ext }}` or `.%(ext)s` or similar (with a little wiggle room)
+    |> validate_format(:output_path_template_override, MediaProfile.ext_regex(), message: "must end with .{{ ext }}")
     |> cast_assoc(:metadata, with: &SourceMetadata.changeset/2, required: false)
     |> unique_constraint([:collection_id, :media_profile_id, :title_filter_regex], error_key: :original_url)
   end

lib/pinchflat/sources/sources.ex

@@ -19,6 +19,19 @@ defmodule Pinchflat.Sources do
   alias Pinchflat.SlowIndexing.SlowIndexingHelpers
   alias Pinchflat.Metadata.SourceMetadataStorageWorker
 
+  @doc """
+  Returns the relevant output path template for a source.
+  Pulls from the source's override if present, otherwise uses the media profile's.
+
+  Returns binary()
+  """
+  def output_path_template(source) do
+    source = Repo.preload(source, :media_profile)
+    media_profile = source.media_profile
+
+    source.output_path_template_override || media_profile.output_path_template
+  end
+
   @doc """
   Returns the list of sources. Returns [%Source{}, ...]
   """