Update README and add requirements.txt

README.md

@@ -1,5 +1,16 @@
 # BTech Time Tracker
 
-### To-Do
+### Getting started
+
+Requirements
+
+- install pipenv and run `pipenv install` to install dependencies
+- run `pipenv shell` to activate the virtual environment
+
+Django
+
+- `python manage.py makemigrations`
+- `python manage.py migrate`
+- `python manage.py createsuperuser`
+- `python manage.py runserver`
 
-- Add a "current_period" field to student that stores the fk of their current period.

attendance/signals.py

@@ -0,0 +1,24 @@
+from django.db.models.signals import post_save, post_delete
+from django.dispatch import receiver
+from .models import Period
+
+@receiver(post_save, sender=Period)
+def student_period_created_updated(sender, instance, created, **kwargs):
+    if created and not instance.clocked_out:
+        instance.student.is_clocked_in = True
+        instance.student.current_period_id = instance.pk
+        instance.student.save()
+    elif not created and not instance.clocked_out:
+        instance.student.is_clocked_in = True
+        instance.student.current_period_id = instance.pk
+        instance.student.save()
+    elif instance.clocked_out and not created:
+        instance.student.is_clocked_in = False
+        instance.student.save()
+
+@receiver(post_delete, sender=Period)
+def student_period_deleted(sender, instance, **kwargs):
+    if instance.student.current_period_id == instance.pk:
+        instance.student.is_clocked_in = False
+        instance.student.current_period_id = None
+        instance.student.save()

requirements.txt

@@ -0,0 +1,27 @@
+#
+# These requirements were autogenerated by pipenv
+# To regenerate from the project's Pipfile, run:
+#
+#    pipenv lock --requirements
+#
+
+-i https://pypi.org/simple
+asgiref==3.3.1; python_version >= '3.5'
+django-appconf==1.0.4
+django-compressor==2.4
+django-easy-timezones==0.8.0
+django-libsass==0.8
+django-qr-code==2.1.0
+django==3.1.6
+ipaddress==1.0.16
+libsass==0.20.1
+pillow==8.1.0
+pygeoip==0.3.2
+pytz==2016.6
+qrcode==6.1
+rcssmin==1.0.6
+rjsmin==1.1.0
+segno==1.3.1; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
+six==1.15.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
+sqlparse==0.4.1; python_version >= '3.5'
+wheel==0.29.0