[ADD] base_vat: add VAT validation for Peruvian localization.

addons/base_vat/base_vat.py

@@ -63,6 +63,7 @@ _ref_vat = {
     'mx': 'MXABC123456T1B',
     'nl': 'NL123456782B90',
     'no': 'NO123456785',
+    'pe': 'PER10254824220 or PED10254824220',
     'pl': 'PL1234567883',
     'pt': 'PT123456789',
     'ro': 'RO1234567897',
@@ -219,7 +220,7 @@ class res_partner(osv.osv):
             return vat[7] == self._ie_check_char(vat[2:7] + vat[0] + vat[8])
         return False
 
-    # Mexican VAT verification, contributed by <moylop260@hotmail.com>
+    # Mexican VAT verification, contributed by Vauxoo
     # and Panos Christeas <p_christ@hol.gr>
     __check_vat_mx_re = re.compile(r"(?P<primeras>[A-Za-z\xd1\xf1&]{3,4})" \
                                     r"[ \-_]?" \
@@ -276,6 +277,41 @@ class res_partner(osv.osv):
             return False
         return check == int(vat[8])
 
+    # Peruvian VAT validation, contributed by Vauxoo
+    def check_vat_pe(self, vat):
+
+        vat_type,vat = vat and len(vat)>=2 and (vat[0], vat[1:]) or (False, False)
+
+        if vat_type and vat_type.upper() == 'D':
+            #DNI
+            return True
+        elif vat_type and vat_type.upper() == 'R':
+            #verify RUC
+            factor = '5432765432'
+            sum = 0
+            dig_check = False
+            if len(vat) != 11:
+                return False
+            try:
+                int(vat)
+            except ValueError:
+                return False 
+                         
+            for f in range(0,10):
+                sum += int(factor[f]) * int(vat[f])
+                
+            subtraction = 11 - (sum % 11)
+            if subtraction == 10:
+                dig_check = 0
+            elif subtraction == 11:
+                dig_check = 1
+            else:
+                dig_check = subtraction
+            
+            return int(vat[10]) == dig_check
+        else:
+            return False
+        
 res_partner()
 
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