Add barcode to checkin

Add Code 128 format barcode to checkin
to cater for barcode scanners at registration.
Add flagged link to boarding pass to dashboard.

pinaxcon/templates/symposion/dashboard/_categories.html

@@ -66,6 +66,9 @@
         {% flag "badge_preview" %}
         <a class="btn btn-info" role="button" href="{% url "user_badge" %}">Preview my badge</a>
         {% endflag %}
+        {% flag "view_boardingpass" %}
+        <a class="btn btn-info" role="button" href="{% url "boardingpass" %}">View Boarding Pass</a>
+        {% endflag %}
       </div>
     </div>
     <div class="col-md-6 mb-3 mb-md-0">

requirements.txt

@@ -44,6 +44,9 @@ pinax-stripe==4.4.0
 requests==2.24.0
 stripe==2.55.0
 
+# Regidesk
+python-barcode==0.15.1
+
 # SASS Compiler and template tags
 libsass==0.20.1
 django-sass-processor==0.8.2

vendor/regidesk/regidesk/models.py

@@ -17,6 +17,8 @@ from django.db.models import Count
 from django.db.models.signals import post_save
 from django.contrib.auth import get_user_model
 import pyqrcode
+from barcode import Code128
+from barcode.writer import ImageWriter
 
 from symposion import constants
 from symposion.text_parser import parse
@@ -155,6 +157,19 @@ class CheckIn(models.Model):
 
         return self._checkin_code_png
 
+    @property
+    def barcode(self):
+        """Generates a Code 128 barcode of the checkin code.
+
+        Returns the base64 encoded raw PNG blob for the barcode.
+        """
+        barcode = Code128(self.code, writer=ImageWriter())
+        barcode_io = BytesIO()
+        barcode.write(barcode_io)
+        barcode_io.seek(0)
+        b64_barcode = base64.b64encode(barcode_io.read()).decode('UTF-8')
+        return b64_barcode
+
     @property
     def venueless_token(self):
         """Returns the Venueless JWT token for this checkin's code."""

vendor/regidesk/regidesk/templates/regidesk/_bp_prepare_help.html

@@ -2,8 +2,9 @@
     specific to each proposal:
 <ul>
     <li><code>{% templatetag openvariable %} user {% templatetag closevariable %}</code> e.g. {{ sample.user }}</li>
-    <li><code>{% templatetag openvariable %} qrcode {% templatetag closevariable %}</code> e.g. <code>{% templatetag openvariable %} qrcode|safe {% templatetag closevariable %}</code> produces {{ sample.qrcode|safe }}</li>
+    <li><code>{% templatetag openvariable %} qrcode {% templatetag closevariable %}</code> e.g. <code>{% templatetag openvariable %} qrcode|safe {% templatetag closevariable %}</code> produces Base64 encoded PNG data, to be used in an image tag. For example:<br> <img src="data:image/png;base64,{{ sample.qrcode|safe }}" /></li>
     <li><code>{% templatetag openvariable %} qrcode_url {% templatetag closevariable %}</code> e.g. {{ sample.qrcode_url }}</li>
+    <li><code>{% templatetag openvariable %} barcode {% templatetag closevariable %}</code> e.g. <code>{% templatetag openvariable %} barcode|safe {% templatetag closevariable %}</code> produces Base64 encoded PNG data, to be used in an image tag. For example:<br> <img src="data:image/png;base64,{{ sample.barcode|safe }}" /></li>
     <li><code>{% templatetag openvariable %} code {% templatetag closevariable %}</code> e.g. {{ sample.code }}</li>
     <li><code>{% templatetag openvariable %} user.attendee.ticket_type {% templatetag closevariable %}</code> e.g. {{ sample.user.attendee.ticket_type }}</li>
     <li>The variables <code>invoices</code>, <code>items_pending</code>, <code>items_purchased</code>, <code>categories_missing</code> all return lists of the relevant things</code>

vendor/regidesk/regidesk/urls.py

@@ -13,5 +13,6 @@ urlpatterns = [
     url(r"^checkin/$", views.CheckInLanding.as_view(), name="check_in_scanner"),
     url(r"^checkin/(?P<access_code>[A-Z0-9]{6})/$", views.check_in_overview, name="check_in_user_view"),
     url(r"^checkin/([A-Z0-9]{6})/badge$", views.checken_in_badge, name="check_in_badge"),
+    url(r"^checkin/([A-Z0-9]{6})/barcode.png$", views.checkin_barcode_png, name="checkin_barcode_png"),
     url(r"^$", views.redir_main, name="checkin_choose"),
 ]

vendor/regidesk/regidesk/views.py

@@ -58,12 +58,20 @@ def boardingpass(request):
         checkin = CheckIn.objects.get_or_create(user=user)[0]
 
     boardingpass = checkin.boardingpass
+
+    # QR code
     qrcode_url = request.build_absolute_uri(reverse("regidesk:checkin_png", args=[checkin.code]))
     qrcode = checkin.qrcode
     qrcode_string ='<img src="data:image/png;base64,' + qrcode + '"/>'
     not_qrcode_string = '<img src="cid:qrcode.png"/>'
 
+    # Barcode
+    barcode = checkin.barcode
+    barcode_string ='<img src="data:image/png;base64,' + barcode + '"/>'
+    not_barcode_string = '<img src="cid:barcode.png"/>'
+
     boardingpass_body = boardingpass.html_body.replace(not_qrcode_string, qrcode_string)
+    boardingpass_body = boardingpass.html_body.replace(not_barcode_string, barcode_string)
     ctx = { 'attendee': user.attendee,
             'boardingpass_body': boardingpass_body,
             'boardingpass': boardingpass
@@ -113,6 +121,7 @@ def boarding_overview(request, boarding_state="pending"):
 
     return render(request, "regidesk/boardingpass_overview.html", ctx)
 
+
 def checkin_png(request, checkin_code):
 
     checkin = CheckIn.objects.get(checkin_code=checkin_code)
@@ -144,6 +153,22 @@ def checkin_qrcode_url(code):
     return qrcode_url
 
 
+def checkin_barcode_png(request, checkin_code):
+
+    checkin = CheckIn.objects.get(checkin_code=checkin_code)
+    if not checkin:
+        raise Http404()
+
+    response = HttpResponse()
+    response["Content-Type"] = "image/png"
+    response["Content-Disposition"] = 'inline; filename="barcode.png"'
+
+    barcode = base64.b64decode(checkin.barcode)
+    response.write(barcode)
+
+    return response
+
+
 @permission_required("regidesk.send_boarding_pass")
 def boarding_prepare(request):
 
@@ -178,8 +203,9 @@ def boarding_prepare(request):
             "user": sample_checkin.user,
             "boardingpass": sample_checkin.boardingpass,
             "code": sample_checkin.code,
-            "qrcode": '<img src="data:image/png;base64,' + sample_checkin.qrcode + '"/>',
+            "qrcode": sample_checkin.qrcode,
             "qrcode_url": checkin_qrcode_url(sample_checkin.code),
+            "barcode": sample_checkin.barcode,
         }
         ctx = Context(sample_ctx)
         ctx["invoices"] = invoices(ctx)
@@ -222,6 +248,7 @@ def prepare_boarding_pass(user, template, attendee=None):
         "code": user.checkin.code,
         "qrcode": user.checkin.qrcode,
         "qrcode_url": checkin_qrcode_url(user.checkin.code),
+        "barcode": user.checkin.barcode,
     }
     ctx = Context(ctx)
     ctx["invoices"] = invoices(ctx)
@@ -264,6 +291,9 @@ def send_boarding_pass(bpass, user):
         qrcode = base64.b64decode(user.checkin.qrcode)
         msg.attach(filename="qrcode.png", content=qrcode, mimetype="image/png")
 
+        barcode = base64.b64decode(user.checkin.barcode)
+        msg.attach(filename="barcode.png", content=barcode, mimetype="image/png")
+
     msg.send()
     bpass.sent = datetime.now()
     bpass.save()
@@ -350,6 +380,7 @@ def checken_in_badge(request, access_code):
     badge = render_badge(check_in[0].user, format="svg", overlay=True)
     return badge
 
+
 @login_required
 def redir_main(request):
     if request.user.has_perm('regidesk.view_boarding_pass'):

vendor/regidesk/requirements.txt

@@ -2,3 +2,5 @@ django-countries>=6.1.3
 requests>=2.24.0
 pypng
 pyqrcode
+python-barcode
+python-barcode[images]