ytdl-sub/src/ytdl_sub/prebuilt_presets/helpers/url_bilateral.yaml
Jesse Bannon 017db953bf
[FEATURE] Automatically handle playlists ordered in reverse (#948)
Playlists have always been a pain-point with ytdl-sub. If an author adds new videos to the end of a playlist, as opposed to the front, it breaks ytdl-sub's intuition of incremental scraping by breaking on the first (oldest) video. This update now makes it possible to handle this in the prebuilt TV Show presets:
- Add each URL variable (`url`, `url2`, ...) into the `download` portion of the subscription twice
- First definition is what we all know and use, simply scrapes first-to-last, then downloads last-to-first
- Second definition does the following:
  - Check to see if a URL is a YouTube playlist URL, if so...
    - Set the field to download, but with modifications to scrape last-to-first, then download first-to-last
  - Otherwise...
    - Set the field to an empty string, which means ytdl-sub will skip it
2024-04-01 04:24:41 -07:00

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YAML

presets:
# multi-url with bilateral scraping built into it via
# inspection of the URL and conditionally adding another
# ytdl-sub url download with the scraping and download reversed
_url_bilateral_overrides:
overrides:
enable_bilateral_scraping: True
"%is_bilateral_url": >-
{ %contains( $0, "youtube.com/playlist" ) }
"%bilateral_url": >-
{
%if(
%and(
enable_bilateral_scraping,
subscription_has_download_archive,
%is_bilateral_url($0)
),
$0,
""
)
}