Kieran
22439e0273
* [WIP] renamed and migrated upload_date column * Refactored yt-dlp media module * Refactored parse_upload_date * Refactored media item upload_date_index * Got media tests running * Refactored media item table live * Cleaned up the stragglers * Fixed old oversight re: original_url
80 lines
2.5 KiB
Elixir
80 lines
2.5 KiB
Elixir
defmodule Pinchflat.Podcasts.PodcastHelpers do
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@moduledoc """
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Methods for fetching postcast-related data from a source
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or its media items
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"""
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use Pinchflat.Media.MediaQuery
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alias Pinchflat.Repo
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alias Pinchflat.Metadata.MediaMetadata
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alias Pinchflat.Metadata.SourceMetadata
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@doc """
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Returns a list of media items that have been downloaded to disk
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and have been proven to still exist there.
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Useful for podcasts since we don't want to serve media that
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has been deleted or moved, but it's also fairly generally useful
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so I could see this being moved in the future.
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Options:
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- limit: integer - the maximum number of media items to return
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Returns: [%MediaItem{}]
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"""
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def persisted_media_items_for(source, opts \\ []) do
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limit = Keyword.get(opts, :limit, 1_000)
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MediaQuery.new()
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|> where(^dynamic(^MediaQuery.for_source(source) and ^MediaQuery.downloaded()))
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|> order_by(desc: :uploaded_at)
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|> Repo.maybe_limit(limit)
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|> Repo.all()
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|> Enum.filter(fn media_item -> File.exists?(media_item.media_filepath) end)
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end
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@doc """
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Selects a cover image for a source based on the source's metadata
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and the metadata of the media items associated with the source. Also
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ensures images exist on disk.
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Only one media item should need to be returned since this is using the
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internal metadata which, so long as the media_item was _downloaded_, should
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be guaranteed to exist.
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Prefers the source's poster, then fanart, then the media item's thumbnail.
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Returns: {:ok, filepath} | {:error, :no_suitable_image}
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"""
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def select_cover_image(source, media_items) do
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source_with_preloads = Repo.preload(source, :metadata)
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source_with_preloads
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|> get_images_by_preference(media_items)
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|> Enum.reject(&is_nil(&1))
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|> Enum.find(&File.exists?/1)
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|> case do
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nil -> {:error, :no_suitable_image}
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filepath -> {:ok, filepath}
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end
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end
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defp get_images_by_preference(source_with_preloads, []) do
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source_metadata = source_with_preloads.metadata || %SourceMetadata{}
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[
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source_metadata.poster_filepath,
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source_metadata.fanart_filepath
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]
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end
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defp get_images_by_preference(source_with_preloads, [media_item | _]) do
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media_item_with_preloads = Repo.preload(media_item, :metadata)
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media_item_metadata = media_item_with_preloads.metadata || %MediaMetadata{}
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source_images = get_images_by_preference(source_with_preloads, [])
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source_images ++ [media_item_metadata.thumbnail_filepath]
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end
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end
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