First steps

src/pretix/base/exporters/__init__.py

@@ -1,4 +1,5 @@
 from .answers import *  # noqa
+from .dekodi import *  # noqa
 from .invoices import *  # noqa
 from .json import *  # noqa
 from .mail import *  # noqa

src/pretix/base/exporters/dekodi.py

@@ -0,0 +1,224 @@
+import json
+
+from django.core.serializers.json import DjangoJSONEncoder
+from django.dispatch import receiver
+
+from pretix.base.models import Invoice, OrderPayment
+
+from ..exporter import BaseExporter
+from ..signals import register_data_exporters
+
+
+class DekodiNREIExporter(BaseExporter):
+    identifier = 'dekodi_nrei'
+    verbose_name = 'dekodi NREI (JSON)'
+    # Specification: http://manuals.dekodi.de/nexuspub/schnittstellenbuch/
+
+    def _encode_invoice(self, invoice: Invoice):
+        hdr = {
+            'APmtA': None,
+            'APmtAEUR': None,
+            'C': str(invoice.invoice_to_country),
+            'CA': None,
+            'CAEUR': None,
+            'CC': self.event.currency,
+            'CGrp': None,
+            'CID': None,
+            'City': invoice.invoice_to_city,
+            'CN': invoice.invoice_to_company,
+            'CNo': None,
+            'CoDA': None,
+            'CoDAEUR': None,
+            'DL': None,
+            'DIC': None,  # Event-land?
+            'DICt': None,
+            'DIDt': invoice.order.datetime.isoformat().replace('Z', '+00:00'),
+            'DIZ': None,
+            'DN': None,
+            'DT': '30' if invoice.is_cancellation else '10',
+            'EbNm': None,
+            'EbPmtID': Nine,
+            'EM': invoice.order.email,
+            'FamN': invoice.invoice_to_name,  # todo: split? should be last name
+            'FCExR': None,
+            'FN': invoice.invoice_to_name,  # todo: split? should be first name
+            'FS': None,
+            'GwA': None,
+            'GwAEUR': None,
+            'IDt': invoice.date.isoformat() + 'T08:00:00+01:00',
+            'INo': invoice.full_invoice_no,
+            'IsNet': invoice.reverse_charge,
+            'IsPf': False,
+            'IT': None,
+            'KlnId': None,
+            'ODt': invoice.order.datetime.isoformat().replace('Z', '+00:00'),
+            'OID': invoice.order.code,
+            'Pb': None,
+            'PL': None,
+            'PmDt': None,  # todo: payment date?
+            'PPEm': None,  # todo: fill,
+            'PvrINo': invoice.refers.full_invoice_no if invoice.refers else None,
+            'PrvOID': None,
+            'Rmrks': None,
+            'ShA': None,
+            'ShAEUR': None,
+            'ShDt': None,
+            'ShGrp': None,
+            'SID': self.event.slug,
+            'SN': str(self.event),
+            'SSID': None,
+            'SSINo': None,
+            'SSN': None,
+            'SSOID': None,
+            'Str': invoice.invoice_to_street,
+            'TGrossA': gross_total,  # TODO,
+            'TGrossAEUR': None,
+            'TNetA': net_total,   # TODO,
+            'TNetAEUR': None,
+            'TNo': None,
+            'TT': None,
+            'TVatA': vat_total,  # todo
+            'VatDp': False,
+            'VatID': invoice.invoice_to_vat_id or None,
+            'Zip': invoice.invoice_to_zipcode
+
+        }
+        positions = []
+        for l in invoice.lines.all():
+            positions.append({
+                'ABcd': None,
+                'ADes': l.description,
+                'ANetA': round(float(l.net_value), 2),
+                'ANetAEUR': None,
+                'ANo': None,  # TODO: needs to be there!
+                'ANo1': None,
+                'ANo2': None,
+                'ANoEx': None,
+                'ANoM': None,
+                'AQ': -1 if invoice.is_cancellation else 1,
+                'ASku': None,
+                'AST': 0,
+                'ATm': None,
+                'ATT': None,
+                'AU': None,
+                'AVatP': round(float(l.tax_rate), 2),
+                'AWgt': None,
+                'DiC': None,
+                'DiCeID': None,
+                'DICeN': None,
+                'DiZ': None,
+                'DIDt': (l.subevent or invoice.order.event).date_from.isoformat().replace('Z', '+00:00'),
+                'OC': None,
+                'PosGrossA': round(float((-1 if invoice.is_cancellation else 1) * l.gross_value), 2),
+                'PosGrossAEUR': None,
+                'PosNetA': round(float((-1 if invoice.is_cancellation else 1) * l.net_value), 2),
+                'PosNetAEUR': None,
+            })
+        payments = []
+        for p in invoice.order.payments.filter(
+            state__in=(OrderPayment.PAYMENT_STATE_CONFIRMED, OrderPayment.PAYMENT_STATE_PENDING,
+                       OrderPayment.PAYMENT_STATE_STARTED, OrderPayment.PAYMENT_STATE_REFUNDED)
+        ):
+            if p.provider == 'paypal':
+                payments.append({
+                    'PTID': '1',
+                    'PTN': 'PayPal',
+                    'PTNo1': None,  # TODO: transaktionsid
+                    'PTNo2': None,
+                    'PTNo3': None,
+                    'PTNo4': None,
+                    'PTNo5': None,
+                    'PTNo6': None,
+                    'PTNo7': None,
+                    'PTNo8': None,
+                    'PTNo9': None,
+                    'PTNo10': None,
+                    'PTNo11': None,
+                    'PTNo12': None,
+                    'PTNo13': None,
+                    'PTNo14': None,
+                    'PTNo15': None,
+                })
+            elif p.provider == 'banktransfer':
+                payments.append({
+                    'PTID': '4',
+                    'PTN': 'Vorkasse',
+                    'PTNo1': None,  # TODO: transaktionsid
+                    'PTNo2': None,
+                    'PTNo3': None,
+                    'PTNo4': None,
+                    'PTNo5': None,
+                    'PTNo6': None,
+                    'PTNo7': None,
+                    'PTNo8': None,
+                    'PTNo9': None,
+                    'PTNo10': None,
+                    'PTNo11': None,
+                    'PTNo12': None,
+                    'PTNo13': None,
+                    'PTNo14': None,
+                    'PTNo15': None,
+                })
+            elif p.provider == 'sepadebit':
+                payments.append({
+                    'PTID': '5',
+                    'PTN': 'Lastschrift',
+                    'PTNo1': None,  # TODO: transaktionsid
+                    'PTNo2': None,
+                    'PTNo3': None,
+                    'PTNo4': None,
+                    'PTNo5': None,
+                    'PTNo6': None,
+                    'PTNo7': None,
+                    'PTNo8': None,
+                    'PTNo9': None,
+                    'PTNo10': None,
+                    'PTNo11': None,
+                    'PTNo12': None,
+                    'PTNo13': None,
+                    'PTNo14': None,
+                    'PTNo15': None,
+                })
+            elif p.provider.startswith('stripe'):
+                payments.append({
+                    'PTID': '81',
+                    'PTN': 'Stripe',
+                    'PTNo1': None,  # TODO: transaktionsid
+                    'PTNo2': None,
+                    'PTNo3': None,
+                    'PTNo4': None,
+                    'PTNo5': None,
+                    'PTNo6': None,
+                    'PTNo7': None,
+                    'PTNo8': None,
+                    'PTNo9': None,
+                    'PTNo10': None,
+                    'PTNo11': None,
+                    'PTNo12': None,
+                    'PTNo13': None,
+                    'PTNo14': None,
+                    'PTNo15': None,
+                })
+        return {
+            'IsValid': True,
+            'Hdr': hdr,
+            'InvcPstns': positions,
+            'PmIs': payments,
+            'ValidationMessage': ''
+        }
+
+    def render(self, form_data):
+        jo = {
+            'Format': 'NREI',
+            'Version': '18.10.2',
+            'SourceSystem': 'pretix',
+            'Data': [
+                self._encode_invoice(i) for i in self.event.invoices.select_related('order').prefetch_related('lines', 'lines__subevent')
+            ]
+        }
+        return '{}_nrei.json'.format(self.event.slug), 'application/json', json.dumps(jo, cls=DjangoJSONEncoder)
+
+
+@receiver(register_data_exporters, dispatch_uid="exporter_dekodi_nrei")
+def register_dekodi_export(sender, **kwargs):
+    return DekodiNREIExporter