{% load url from future %}
<h2>
    {% if current == 'edit' %}
        Edit Invoice for
    {% endif %}
    {% if current == 'entries' %}
        Entries for invoice of
    {% endif %}
    {% if current == 'detail' %}
        Invoice Details for
    {% endif %}

    {{ invoice.project.name }} hours
    {% if invoice.start %}
        from {{ invoice.start }} to {{ invoice.end }}
    {% else %}
        through {{ invoice.end }}{% endif %}
</h2>
<ul class="unstyled subnav">
    <li>
        <a href="{% url 'list_invoices' %}">Previous Invoices</a>
    </li>
    <li>
        {% if current != 'detail' %}
            <a href="{% url 'view_invoice' invoice.id %}">View Invoice</a>
        {% else %}
            View Invoice
        {% endif %}
    </li>
    <li>
        {% if current != 'edit' %}
            <a href="{% url 'edit_invoice' invoice.id %}">Edit Invoice</a>
        {% else %}
            Edit Invoice
        {% endif %}
    </li>
    <li>
        {% if current != 'entries' %}
            <a href="{% url 'view_invoice_entries' invoice.id %}">Entries</a>
        {% else %}
            Entries
        {% endif %}
    </li>
    <li>
        <a href="{% url 'view_invoice_csv' invoice.id %}">Download CSV</a>
    </li>
</ul>
