Add get_vendor_items() and get_vendor_item() methods for web API

corepos/api.py

@@ -421,3 +421,46 @@ class CoreWebAPI(object):
         response = self.post(params)
         result = self.parse_response(response)
         return json.loads(result)
+
+    def get_vendor_items(self, **columns):
+        """
+        Fetch some or all of VendorItem records from CORE.
+
+        :returns: A (potentially empty) list of vendor item dict records.
+
+        To fetch all vendor items::
+
+           api.get_vendor_items()
+
+        To fetch only products with brand name "Braggs"::
+
+           api.get_vendor_items(brand='Braggs')
+        """
+        params = {
+            'entity': 'VendorItems',
+            'submethod': 'get',
+            'columns': columns,
+        }
+        response = self.post(params)
+        result = self.parse_response(response)
+        return [json.loads(rec) for rec in result]
+
+    def get_vendor_item(self, upc, vendorID, **columns):
+        """
+        Fetch an existing VendorItem record from CORE.
+
+        :returns: Either a vendor item dict record, or ``None``.
+        """
+        columns['upc'] = upc
+        columns['vendorID'] = vendorID
+        params = {
+            'entity': 'VendorItems',
+            'submethod': 'get',
+            'columns': columns,
+        }
+        response = self.post(params)
+        result = self.parse_response(response)
+        if result:
+            if len(result) > 1:
+                log.warning("CORE API returned %s VendorItem results", len(result))
+            return json.loads(result[0])