Add an importer for BCGE MT940 exports.

This importer tries to parse the data that BCGE exports in the transaction
detail field, namely ORDP, BENM and REMI.

This should probably be added to the mt940 library, as it's MT940 specific encoding.

docs/importers.rst

@@ -373,3 +373,14 @@ Import PDF from `Viseca One <https://one-digitalservice.ch/>`__
   from tariochbctools.importers.viseca import importer as visecaimp
 
   CONFIG = [visecaimp.Importer(r"Kontoauszug.*\.pdf", "Assets:Viseca:CHF")]
+
+BCGE
+----
+
+Import mt940 from `BCGE <https://www.bcge.ch/>`__
+
+.. code-block:: python
+
+  from tariochbctools.importers.bcge import importer as  bcge
+
+  CONFIG = [bcge.BCGEImporter("/\d+\.mt940", "Assets:BCGE")]

src/tariochbctools/importers/bcge/importer.py

@@ -0,0 +1,31 @@
+import re
+
+from tariochbctools.importers.general import mt940importer
+
+
+def strip_newline(string):
+    return string.replace("\n", "").replace("\r", "")
+
+
+class BCGEImporter(mt940importer.Importer):
+    def prepare_payee(self, trxdata):
+        transaction_details = strip_newline(trxdata["transaction_details"])
+        payee = re.search(r'ORDP/([^/]+)', transaction_details)
+        if payee is None:
+            return ""
+        else:
+            return payee.group(1)
+
+    def prepare_narration(self, trxdata):
+        transaction_details = strip_newline(trxdata["transaction_details"])
+        extra_details = strip_newline(trxdata["extra_details"])
+        beneficiary = re.search(
+            r'/BENM/([^/]+)', transaction_details)
+        remittance = re.search(
+            r'/REMI/([^/]+)', transaction_details)
+        narration = []
+        if beneficiary is not None:
+            narration.append("Beneficiary: %s" % beneficiary.group(1))
+        if remittance is not None:
+            narration.append("Remittance: %s" % remittance.group(1))
+        return ("%s - %s" % (extra_details, ",".join(narration)))