26 lines
774 B
Python
26 lines
774 B
Python
import re
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from .. exceptions import InvalidVideoIdException
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PATTERN = re.compile(r"((?<=(v|V)/)|(?<=be/)|(?<=(\?|\&)v=)|(?<=embed/))([\w-]+)")
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YT_VIDEO_ID_LENGTH = 11
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def extract_video_id(url_or_id: str) -> str:
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ret = ''
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if type(url_or_id) != str:
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raise TypeError(f"{url_or_id}: URL or VideoID must be str, but {type(url_or_id)} is passed.")
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if len(url_or_id) == YT_VIDEO_ID_LENGTH:
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return url_or_id
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match = re.search(PATTERN, url_or_id)
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if match is None:
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raise InvalidVideoIdException(url_or_id)
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try:
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ret = match.group(4)
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except IndexError:
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raise InvalidVideoIdException(url_or_id)
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if ret is None or len(ret) != YT_VIDEO_ID_LENGTH:
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raise InvalidVideoIdException(url_or_id)
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return ret
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