{% load i18n mobile_tags %}
{% if activity.start >= today or not activity|mobile_activity_in_progress %}
  <form action="{% url 'mobile__start_activity' activity.id %}" method="POST">{% csrf_token %}
    <input type="submit" class="button" value="{% translate 'Start this activity' %}" />
  </form>
{% else %}
  <form action="{% url 'mobile__stop_activity' activity.id %}" method="POST">{% csrf_token %}
    <input type="submit" class="button" value="{% translate 'Stop this activity' %}" />
  </form>
{% endif %}