build a breadcrumb component for fastui

fastui_breadcrumb_component.py

from fastui import components as c
from fastui.events import GoToEvent

def build_breadcrumb(links: list[tuple[str, str]]) -> c.Div:
    """
    Returns a fastui `Div` component that behaves as a bootstrap `breadcrumb`.

    `links` input is a list of tuples like [(display_text, url_string), ...].

    Each link becomes a sub `Div` marked with the bootstrap `breadcrumb-item` class.
    Is marked with the `breadcrumb-item active` class to style it appropriately.

    See also: https://getbootstrap.com/docs/4.0/components/breadcrumb/
    """

    breadcrumb_items = []
    for i, link in enumerate(links):
        is_last_link = i == len(links) - 1
        
        if link[1]:
            item_component = c.Link(
                components=[c.Text(text=link[0])],
                on_click=GoToEvent(url=link[1]),
            )
        else:
            item_component = c.Text(text=link[0])
        
        if is_last_link:
            class_name = 'breadcrumb-item active'
        else:
            class_name = 'breadcrumb-item'

        breadcrumb_items.append(
            c.Div(
                class_name=class_name,
                components=[item_component],
            ),
        )

    return c.Div(class_name='breadcrumb', components=breadcrumb_items)