{#- chirp-ui: Breadcrumbs component
    Navigation trail. Items: list of {label, href?}. Last item (current) has no href.

    Usage:
        {% from "chirpui/breadcrumbs.html" import breadcrumbs %}

        breadcrumbs([
            {"label": "Home", "href": "/"},
            {"label": "Docs", "href": "/docs"},
            {"label": "Getting Started"}
        ])
-#}

{% def breadcrumbs(items, cls="") %}
<nav class="chirpui-breadcrumbs{{ " " ~ cls if cls else "" }}" aria-label="Breadcrumb">
    <ol class="chirpui-breadcrumbs__list">
        {% for item in items %}
        <li class="chirpui-breadcrumbs__item">
            {% if item.get("href") %}
                <a href="{{ item.href }}" class="chirpui-breadcrumbs__link">{{ item.label }}</a>
            {% else %}
                <span class="chirpui-breadcrumbs__current" aria-current="page">{{ item.label }}</span>
            {% end %}
        </li>
        {% end %}
    </ol>
</nav>
{% end %}