added basic functionality to import designers into esales cluster

esales/utils.py

@@ -0,0 +1,35 @@
+# coding=utf-8
+import os
+import uuid
+import time
+from xml.etree.cElementTree import ElementTree, Element, SubElement, dump
+
+
+class ImportFile(object):
+
+    def __init__(self):
+        self.operations = []
+
+    def add_operation(self, operation, model):
+        assert operation in ["create", "update", "delete"]
+        self.operations.append((operation, model))
+
+    @property
+    def etree(self):
+        root = Element("operations")
+        for name, model in self.operations:
+            operation = SubElement(root, name)
+            operation.append(model.etree)
+        return root
+
+    def dump_xml(self):
+        return dump(self.etree)
+
+    def write(self, directory, filename=None):
+        if not os.path.exists(directory):
+            os.makedirs(directory)
+        if not filename:
+            filename = "{}.xml".format(time.time())
+        xml = ElementTree(self.etree)
+        xml.write("{}/{}".format(directory, filename),
+                  encoding="UTF-8", xml_declaration=True)