Added vat_number

Author: sgeulette

src/imio/esign/browser/settings.py

@@ -5,6 +5,35 @@
 from plone.z3cform import layout
 from zope import schema
 from zope.interface import Interface
+from zope.interface import Invalid
+
+
+def validate_vat_number(va_nb):
+    """Validate the VAT number format. It should start with BE followed by 10 digits,
+    with the last 2 digits being a control checksum of the first 8 digits."""
+    if not va_nb:
+        return True
+
+    # Check format: BE followed by 10 digits
+    if not va_nb.startswith('BE'):
+        raise Invalid(_("VAT number must start with 'BE'"))
+
+    if len(va_nb) != 12:
+        raise Invalid(_("VAT number must be 12 characters (BE + 10 digits)"))
+
+    digits = va_nb[2:]
+    if not digits.isdigit():
+        raise Invalid(_("VAT number must contain 10 digits after 'BE'"))
+
+    # Validate checksum: last 2 digits should be 97 - (first 8 digits modulo 97)
+    first_eight = int(digits[:8])
+    control = int(digits[8:10])
+    expected_control = 97 - (first_eight % 97)
+
+    if control != expected_control:
+        raise Invalid(_("Invalid VAT number: checksum verification failed"))
+
+    return True
 
 
 class IImioEsignSettings(Interface):
@@ -21,6 +50,13 @@ class IImioEsignSettings(Interface):
         required=False,
     )
 
+    vat_number = schema.TextLine(
+        title=_("VAT number"),
+        description=_("VAT number used for esign billing (BE0123456789)."),
+        constraint=validate_vat_number,
+        required=True,
+    )
+
 
 class ImioEsignSettings(RegistryEditForm):
     schema = IImioEsignSettings

src/imio/esign/utils.py

@@ -111,6 +111,11 @@ def create_external_session(session_id, b64_cred=None, esign_root_url=None):
             "sessionName": session["title"],
         }
     }
+    # not mandatory now
+    # vat_number = api.portal.get_registry_record("imio.esign.vat_number", default="BE0000000097")
+    vat_number = api.portal.get_registry_record("imio.esign.vat_number", default="")
+    if vat_number:
+        data_payload["commonData"]["vatNumber"] = vat_number
 
     signers = [fdic["email"] for fdic in session["signers"]]
     if signers: