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import html
from typing import (
TypeAlias,
Union,
Callable,
Optional,
cast,
)
HTML: TypeAlias = Union[tuple, list, Callable[[], str], None,
str, int, float]
standalones = ['hr', 'br', 'meta']
def _render_document(document: HTML) -> str:
if type(document) == tuple:
tag, *body = document
if body and type(body[0]) == dict:
print(body[0])
attributes = ' '.join(f'{a}="{html.escape(b)}"'
for a, b in body[0].items())
body = body[1:]
start = f'<{tag} {attributes}>'
else:
start = f'<{tag}>'
if tag in standalones:
return start
else:
items = ''.join(_render_document(b) for b in body)
return start + f'{items}</{tag}>'
elif callable(document):
return str(document())
elif type(document) == list:
return ''.join(_render_document(e) for e in document)
elif document is None:
return ''
else:
# strings, and everything else
return html.escape(str(document))
def render_document(document: HTML) -> str:
return '<!doctype html>\n' + _render_document(document)
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