Resolve "Events should lead to the cancellation of lessons"

Closes #171 (closed)

aleksis/apps/chronos/templates/chronos/partials/lesson.html

@@ -5,7 +5,7 @@
         {# Display background color only if lesson is not cancelled and it is not the old room #}
         {% if not smart %}
           {% include "chronos/partials/subject_colour.html" with subject=lesson_period.lesson.subject %}
-        {% elif not sub.cancelled and not lesson_period.get_substitution.cancelled_for_teachers %}
+        {% elif not sub.cancelled and not lesson_period.get_substitution.cancelled_for_teachers and not lesson_period.replaced_by_event %}
           {% if not type.value == "room" or lesson_period.room == lesson_period.get_room or lesson_period.get_room == el %}
             {% if sub and sub.subject %}
               {% include "chronos/partials/subject_colour.html" with subject=sub.subject %}
@@ -17,10 +17,15 @@
         {% endwith %}
         "
         {# Add CSS class for sub when it's a sub #}
-     class="{% if lesson_period.get_substitution and smart %}lesson-with-sub{% endif %}"
+     class="{% if smart %}{% if lesson_period.get_substitution or lesson_period.replaced_by_event %}lesson-with-sub{% endif %}{% endif %}"
 >
   <p>
-    {% if lesson_period.get_substitution and smart %}
+    {% if lesson_period.replaced_by_event and smart %}
+      {% include "chronos/partials/groups.html" with groups=lesson_period.lesson.groups.all %}
+      {% include "chronos/partials/subject.html" with subject=lesson_period.lesson.subject %}
+      <br/>
+      <span class="badge new green">{% trans "Cancelled due to an event" %}</span>
+    {% elif lesson_period.get_substitution and smart %}
       {% with sub=lesson_period.get_substitution %}
         {# SUBSTITUTION #}
         {% if type.value == "room" and lesson_period.room != lesson_period.get_room and lesson_period.get_room != el %}