Merge pull request #203 from interlegis/199-barcode_comprovante

199 - barcode para comprovante de Protocolo

protocoloadm/urls.py

@@ -1,4 +1,5 @@
 from django.conf.urls import include, url
+
 from protocoloadm.views import (AnularProtocoloAdmView,
                                 ComprovanteProtocoloView,
                                 DetailDocumentoAdministrativo,

protocoloadm/views.py

@@ -17,6 +17,7 @@ from vanilla import GenericView
 import sapl
 from materia.models import Proposicao, TipoMateriaLegislativa
 from sapl.crud import build_crud
+from sapl.utils import create_barcode
 
 from .forms import (AnularProcoloAdmForm, DocumentoAcessorioAdministrativoForm,
                     ProposicaoSimpleForm, ProtocoloDocumentForm, ProtocoloForm,
@@ -321,7 +322,21 @@ class ComprovanteProtocoloView(TemplateView):
         numero = self.kwargs['pk']
         ano = self.kwargs['ano']
         protocolo = Protocolo.objects.get(ano=ano, numero=numero)
-        return self.render_to_response({"protocolo": protocolo})
+
+        # numero is string, padd with zeros left via .zfill()
+        base64_data = create_barcode(numero.zfill(6))
+        barcode = 'data:image/png;base64,{0}'.format(base64_data)
+
+        autenticacao = "** NULO **"
+
+        if not protocolo.anulado:
+            autenticacao = str(protocolo.tipo_processo) + \
+                           protocolo.data.strftime("%y/%m/%d") + \
+                           str(protocolo.numero).zfill(6)
+
+        return self.render_to_response({"protocolo": protocolo,
+                                        "barcode": barcode,
+                                        "autenticacao": autenticacao})
 
 
 class ProtocoloMateriaView(FormMixin, GenericView):

sapl/utils.py

@@ -32,6 +32,23 @@ def xstr(s):
     return '' if s is None else str(s)
 
 
+def create_barcode(value):
+    ''' 
+        creates a base64 encoded barcode PNG image
+    '''
+    from base64 import b64encode
+    from reportlab.graphics.barcode import createBarcodeDrawing
+
+    barcode = createBarcodeDrawing('Code128',
+                                   value=value,
+                                   barWidth=170,
+                                   height=50,
+                                   fontSize=2,
+                                   humanReadable=True)
+    data = b64encode(barcode.asString('png'))
+    return data.decode('utf-8')
+
+
 def make_choices(*choice_pairs):
     assert len(choice_pairs) % 2 == 0
     ipairs = iter(choice_pairs)

templates/protocoloadm/comprovante.html

@@ -36,8 +36,14 @@
 		<tr> <td colspan="2" align="center"><b>COMPROVANTE DE PROTOCOLO</b></td> </tr>
 
 		<tr>
-			<td>Código de Barra</td>
-			<td align="center">Autenticação ??</td>
+			<td>
+				<center>
+					<img src="{{barcode}}" height="50px" width="170px">
+					<br>
+					{{ protocolo.numero|stringformat:'06d' }}
+				</center>
+			</td>
+			<td align="center">Autenticação: {{ autenticacao }}</td>
 		</tr>
 
 		<tr>