228 lines
8.7 KiB
Python
228 lines
8.7 KiB
Python
from pathlib import Path
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from typing import Dict
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from typing import Generator
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from typing import List
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from typing import Optional
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from ytdl_sub.config.preset_options import Overrides
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from ytdl_sub.downloaders.downloader import DownloaderOptionsT
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from ytdl_sub.downloaders.downloader import download_logger
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from ytdl_sub.downloaders.youtube.abc import YoutubeDownloader
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from ytdl_sub.downloaders.youtube.abc import YoutubeDownloaderOptions
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from ytdl_sub.downloaders.ytdl_options_builder import YTDLOptionsBuilder
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from ytdl_sub.entries.youtube import YoutubeChannel
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from ytdl_sub.entries.youtube import YoutubeVideo
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from ytdl_sub.utils.thumbnail import convert_url_thumbnail
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from ytdl_sub.validators.date_range_validator import DateRangeValidator
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from ytdl_sub.validators.string_formatter_validators import OverridesStringFormatterValidator
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from ytdl_sub.validators.url_validator import YoutubeChannelUrlValidator
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from ytdl_sub.ytdl_additions.enhanced_download_archive import EnhancedDownloadArchive
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class YoutubeChannelDownloaderOptions(YoutubeDownloaderOptions, DateRangeValidator):
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"""
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Downloads all videos from a youtube channel.
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Usage:
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.. code-block:: yaml
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presets:
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my_example_preset:
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youtube:
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# required
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download_strategy: "channel"
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channel_url: "UCsvn_Po0SmunchJYtttWpOxMg"
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# optional
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channel_avatar_path: "poster.jpg"
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channel_banner_path: "fanart.jpg"
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before: "now"
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after: "today-2weeks"
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"""
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_required_keys = {"channel_url"}
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_optional_keys = {
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"before",
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"after",
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"channel_avatar_path",
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"channel_banner_path",
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}
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def __init__(self, name, value):
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YoutubeDownloaderOptions.__init__(self, name, value)
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DateRangeValidator.__init__(self, name, value)
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self._channel_url = self._validate_key(
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"channel_url", YoutubeChannelUrlValidator
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).channel_url
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self._channel_avatar_path = self._validate_key_if_present(
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"channel_avatar_path", OverridesStringFormatterValidator
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)
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self._channel_banner_path = self._validate_key_if_present(
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"channel_banner_path", OverridesStringFormatterValidator
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)
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@property
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def channel_url(self) -> str:
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"""
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Required. The channel's url, i.e.
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``https://www.youtube.com/channel/UCsvn_Po0SmunchJYOWpOxMg``. URLs with ``/username`` or
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``/c`` are valid to use.
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"""
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return self._channel_url
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@property
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def channel_avatar_path(self) -> Optional[OverridesStringFormatterValidator]:
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"""
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Optional. Path to store the channel's avatar thumbnail image to.
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"""
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return self._channel_avatar_path
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@property
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def channel_banner_path(self) -> Optional[OverridesStringFormatterValidator]:
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"""
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Optional. Path to store the channel's banner image to.
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"""
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return self._channel_banner_path
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class YoutubeChannelDownloader(YoutubeDownloader[YoutubeChannelDownloaderOptions, YoutubeVideo]):
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downloader_options_type = YoutubeChannelDownloaderOptions
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downloader_entry_type = YoutubeVideo
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# pylint: disable=line-too-long
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@classmethod
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def ytdl_option_defaults(cls) -> Dict:
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"""
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Default `ytdl_options`_ for ``channel``
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.. code-block:: yaml
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ytdl_options:
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ignoreerrors: True # ignore errors like hidden videos, age restriction, etc
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break_on_existing: True # stop downloads (newest to oldest) if a video is already downloaded
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break_on_reject: True # stops downloads if the video's upload date is out of the specified 'before'/'after' range
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"""
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return dict(
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super().ytdl_option_defaults(),
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**{
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"break_on_existing": True,
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"break_on_reject": True,
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},
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)
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# pylint: enable=line-too-long
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def __init__(
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self,
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download_options: DownloaderOptionsT,
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enhanced_download_archive: EnhancedDownloadArchive,
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ytdl_options_builder: YTDLOptionsBuilder,
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):
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super().__init__(
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download_options=download_options,
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enhanced_download_archive=enhanced_download_archive,
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ytdl_options_builder=ytdl_options_builder,
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)
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self.channel: Optional[YoutubeChannel] = None
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def _get_channel(self, entry_dicts: List[Dict]) -> YoutubeChannel:
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return YoutubeChannel(
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entry_dict=self._filter_entry_dicts(entry_dicts, extractor="youtube:tab")[0],
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working_directory=self.working_directory,
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)
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def download(self) -> Generator[YoutubeVideo, None, None]:
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"""
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Downloads all videos from a channel
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"""
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ytdl_options_overrides = {}
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# If a date range is specified when download a YT channel, add it into the ytdl options
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source_date_range = self.download_options.get_date_range()
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if source_date_range:
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ytdl_options_overrides["daterange"] = source_date_range
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# dry-run the entire channel download first, this will get the
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# videos that will be downloaded. Afterwards, download each video one-by-one
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entry_dicts = self.extract_info_via_info_json(
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ytdl_options_overrides=ytdl_options_overrides,
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only_info_json=True,
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log_prefix_on_info_json_dl="Downloading metadata for",
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url=self.download_options.channel_url,
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)
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self.channel = self._get_channel(entry_dicts=entry_dicts)
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channel_videos = self._filter_entry_dicts(entry_dicts, sort_by="playlist_index")
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# Iterate in descending order to process older videos first. In case an error occurs and a
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# the channel must be redownloaded, it will fetch most recent metadata first, and break
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# on the older video that's been processed and is in the download archive.
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for idx, entry_dict in enumerate(reversed(channel_videos), start=1):
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video = YoutubeVideo(entry_dict=entry_dict, working_directory=self.working_directory)
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download_logger.info("Downloading %d/%d %s", idx, len(entry_dicts), video.title)
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# Re-download the contents even if it's a dry-run as a single video. At this time,
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# channels do not download subtitles or subtitle metadata
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as_single_video_dict = self.extract_info_with_retry(
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is_downloaded_fn=None if self.is_dry_run else video.is_downloaded,
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ytdl_options_overrides={"writeinfojson": False, "skip_download": self.is_dry_run},
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url=video.kwargs("webpage_url"),
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)
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# Workaround for the ytdlp issue
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# pylint: disable=protected-access
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video._kwargs["requested_subtitles"] = as_single_video_dict.get("requested_subtitles")
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# pylint: enable=protected-access
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yield video
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def _download_thumbnail(
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self,
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thumbnail_url: str,
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output_thumbnail_path: str,
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):
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"""
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Downloads a thumbnail and stores it in the output directory
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Parameters
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----------
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thumbnail_url:
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Url of the thumbnail
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output_thumbnail_path:
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Path to store the thumbnail after downloading
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"""
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if not thumbnail_url:
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download_logger.warning("Could not find a thumbnail for %s", self.channel.uid)
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return
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convert_url_thumbnail(
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thumbnail_url=thumbnail_url, output_thumbnail_path=output_thumbnail_path
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)
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def post_download(self, overrides: Overrides):
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"""
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Downloads and moves channel avatar and banner images to the output directory.
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Parameters
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----------
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overrides
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Overrides that can contain variables in the avatar or banner file path
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"""
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if self.download_options.channel_avatar_path:
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avatar_thumbnail_name = overrides.apply_formatter(
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self.download_options.channel_avatar_path
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)
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self._download_thumbnail(
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thumbnail_url=self.channel.avatar_thumbnail_url(),
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output_thumbnail_path=str(Path(self.working_directory) / avatar_thumbnail_name),
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)
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self.save_file(file_name=avatar_thumbnail_name)
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if self.download_options.channel_banner_path:
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banner_thumbnail_name = overrides.apply_formatter(
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self.download_options.channel_banner_path
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)
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self._download_thumbnail(
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thumbnail_url=self.channel.banner_thumbnail_url(),
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output_thumbnail_path=str(Path(self.working_directory) / banner_thumbnail_name),
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)
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self.save_file(file_name=banner_thumbnail_name)
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