Add function to cancel lessons. Closes #25.

biscuit/apps/chronos/forms.py

@@ -24,4 +24,4 @@ class SelectForm(forms.Form):
 class LessonSubstitutionForm(forms.ModelForm):
     class Meta:
         model = LessonSubstitution
-        fields = ['week', 'lesson_period', 'subject', 'teachers', 'room']
+        fields = ['week', 'lesson_period', 'subject', 'teachers', 'room', 'canceled']

biscuit/apps/chronos/migrations/0003_lessonsubstitution_canceled.py

+# Generated by Django 2.2.5 on 2019-09-07 13:24
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('chronos', '0002_db_indexes'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='lessonsubstitution',
+            name='canceled',
+            field=models.BooleanField(default=False),
+        ),
+    ]

biscuit/apps/chronos/models.py

@@ -119,6 +119,8 @@ class LessonSubstitution(SchoolRelated):
                                       related_name='lesson_substitutions')
     room = models.ForeignKey('Room', models.CASCADE, null=True)
 
+    canceled = models.BooleanField(default=False)
+
     class Meta:
         unique_together = [['school', 'lesson_period', 'week']]
         ordering = ['lesson_period__lesson__date_start', 'week',

biscuit/apps/chronos/templates/chronos/tt_lesson.html

 {# -*- engine:django -*- #}
 
-<div class="card chronos-lesson
-  {% if lesson_period.get_substitution %}
-  border border-warning
-  {% endif %}
-  "
-  style="
-  {% if lesson_period.lesson.subject.colour_fg %}
-  color: {{ lesson_period.lesson.subject.colour_fg }};
-  {% endif %}
-  {% if lesson_period.lesson.subject.colour_bg %}
-  background-color: {{ lesson_period.lesson.subject.colour_bg }};
-  {% endif %}
-  ">
-  <div class="card-body">
-    <div class="row">
-      <div class="col-sm">
-        <span class="card-title">
-          {{ lesson_period.get_subject.abbrev }}
-        </span>
+{% if not lesson_period.get_substitution.canceled %}
+  <div class="card chronos-lesson
+    {% if lesson_period.get_substitution %}
+    border border-warning
+    {% endif %}
+    "
+    style="
+    {% if lesson_period.lesson.subject.colour_fg %}
+    color: {{ lesson_period.lesson.subject.colour_fg }};
+    {% endif %}
+    {% if lesson_period.lesson.subject.colour_bg %}
+    background-color: {{ lesson_period.lesson.subject.colour_bg }};
+    {% endif %}
+    ">
+    <div class="card-body">
+      <div class="row">
+        <div class="col-sm">
+          <span class="card-title">
+            {{ lesson_period.get_subject.abbrev }}
+          </span>
+        </div>
       </div>
-    </div>
-    <div class="row">
-      <div class="col-sm">
-        {% for group in lesson_period.get_groups.all %}
-          <span class="card-text">{{ group.short_name }}</span>
-        {% endfor %}
-      </div>
-      <div class="col-sm">
-        {% for teacher in lesson_period.get_teachers.all %}
-          <a href="{% url 'person_by_id' teacher.id %}"
-            title="{{ teacher.first_name }} {{ teacher.last_name }}"
-            class="card-text"
-            data-poload="{% url 'person_by_id_card' teacher.id %}">
-            {{ teacher.short_name }}
-          </a>
-        {% endfor %}
+      <div class="row">
+        <div class="col-sm">
+          {% for group in lesson_period.get_groups.all %}
+            <span class="card-text">{{ group.short_name }}</span>
+          {% endfor %}
+        </div>
+        <div class="col-sm">
+          {% for teacher in lesson_period.get_teachers.all %}
+            <a href="{% url 'person_by_id' teacher.id %}"
+              title="{{ teacher.first_name }} {{ teacher.last_name }}"
+              class="card-text"
+              data-poload="{% url 'person_by_id_card' teacher.id %}">
+              {{ teacher.short_name }}
+            </a>
+          {% endfor %}
+        </div>
+        <div class="col-sm">
+          <span class="card-text">{{ lesson_period.get_room.short_name }}</span>
+        </div>
       </div>
-      <div class="col-sm">
-        <span class="card-text">{{ lesson_period.get_room.short_name }}</span>
+    </div>
+  </div>
+{% else %}
+  <div class="card text-center chronos-lesson bg-danger">
+    <div class="card-body">
+      <div class="row">
+        <div class="col-sm">
+         {% blocktrans %}Canceled{% endblocktrans %}
+        </div>
       </div>
     </div>
   </div>
-</div>
+{% endif %}