Can identify user on counter with student card UID

counter/migrations/0017_studentcard.py

@@ -0,0 +1,41 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.13 on 2018-10-17 23:02
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [("counter", "0016_producttype_comment")]
+
+    operations = [
+        migrations.CreateModel(
+            name="StudentCard",
+            fields=[
+                (
+                    "id",
+                    models.AutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                (
+                    "uid",
+                    models.CharField(max_length=14, unique=True, verbose_name="uid"),
+                ),
+                (
+                    "customer",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="student_cards",
+                        to="counter.Customer",
+                        verbose_name="student cards",
+                    ),
+                ),
+            ],
+        )
+    ]

counter/models.py

@@ -732,3 +732,23 @@ class Eticket(models.Model):
         return hmac.new(
             bytes(self.secret, "utf-8"), bytes(string, "utf-8"), hashlib.sha1
         ).hexdigest()
+
+
+class StudentCard(models.Model):
+    """
+    Alternative way to connect a customer into a counter
+    We are using Mifare DESFire EV1 specs since it's used for izly cards
+    https://www.nxp.com/docs/en/application-note/AN10927.pdf
+    UID is 7 byte long that means 14 hexa characters
+    """
+
+    UID_SIZE = 14
+
+    uid = models.CharField(_("uid"), max_length=14, unique=True)
+    customer = models.ForeignKey(
+        Customer,
+        related_name="student_cards",
+        verbose_name=_("student cards"),
+        null=False,
+        blank=False,
+    )

counter/views.py

@@ -57,6 +57,7 @@ from subscription.models import Subscription
 from counter.models import (
     Counter,
     Customer,
+    StudentCard,
     Product,
     Selling,
     Refilling,
@@ -121,9 +122,14 @@ class GetUserForm(forms.Form):
         cleaned_data = super(GetUserForm, self).clean()
         cus = None
         if cleaned_data["code"] != "":
-            cus = Customer.objects.filter(
+            if len(cleaned_data["code"]) == StudentCard.UID_SIZE:
-                account_id__iexact=cleaned_data["code"]
+                card = StudentCard.objects.filter(uid=cleaned_data["code"])
-            ).first()
+                if card.exists():
+                    cus = card.first().customer
+            if cus is None:
+                cus = Customer.objects.filter(
+                    account_id__iexact=cleaned_data["code"]
+                ).first()
         elif cleaned_data["id"] is not None:
             cus = Customer.objects.filter(user=cleaned_data["id"]).first()
         if cus is None or not cus.can_buy: