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"""
This module contains a function `format` that modifies a BeautifulSoup object in place. The function searches for
the "html" element with the attribute "dj-assets". The value of "dj-assets" is expected to be a string with two parts
separated by a semicolon (;), the first part being the asset identifier and the second part being the asset prefix.
For each element in the BeautifulSoup object with a "href" or "src" attribute that starts with the asset identifier,
it adds the asset prefix to the attribute value and wraps it in a Django static command.
After processing all elements, it removes the "dj-assets" attribute from the "html" element.
Example:
If the "html" element is <html dj-assets="assets;module">...</html>,
and there is an element <img src="assets/image.png">,
after processing, the "img" element becomes <img src="{% static 'module/assets/image.png' %}">.
"""
from bs4 import BeautifulSoup, Tag
def format(soup: BeautifulSoup) -> None:
if html := soup.find("html"):
if isinstance(html, Tag):
if html.has_attr("dj-assets"):
if isinstance(html["dj-assets"], str):
asset_identifier, asset_prefix = html["dj-assets"].split(";")
for element in soup.find_all(attrs={"href": True}):
if element["href"].startswith(asset_identifier):
element["href"] = f"{{% static '{asset_prefix}/{element['href']}' %}}"
for element in soup.find_all(attrs={"src": True}):
if element["src"].startswith(asset_identifier):
element["src"] = f"{{% static '{asset_prefix}/{element['src']}' %}}"
del html["dj-assets"]