Refactor FinVer to make room for draft feature

atst/domain/requests/financial_verification.py

@@ -0,0 +1,57 @@
+import re
+
+from atst.domain.task_orders import TaskOrders
+from atst.domain.pe_numbers import PENumbers
+from atst.domain.exceptions import NotFoundError
+
+
+class PENumberValidator(object):
+    PE_REGEX = re.compile(
+        r"""
+        (0?\d) # program identifier
+        (0?\d) # category
+        (\d)   # activity
+        (\d+)  # sponsor element
+        (.+)   # service
+    """,
+        re.X,
+    )
+
+    def validate(self, request, field):
+        if self._same_as_previous(request, field):
+            return True
+
+        try:
+            PENumbers.get(field.data)
+        except NotFoundError:
+            return False
+
+        return True
+
+    def suggest_pe_id(self, pe_id):
+        suggestion = pe_id
+        match = self.PE_REGEX.match(pe_id)
+        if match:
+            (program, category, activity, sponsor, service) = match.groups()
+            if len(program) < 2:
+                program = "0" + program
+            if len(category) < 2:
+                category = "0" + category
+            suggestion = "".join((program, category, activity, sponsor, service))
+
+        if suggestion != pe_id:
+            return suggestion
+        return None
+
+    def _same_as_previous(self, request, field):
+        return request.pe_number == field.data
+
+
+class TaskOrderNumberValidator(object):
+    def validate(self, field):
+        try:
+            TaskOrders.get(field.data)
+        except NotFoundError:
+            return False
+
+        return True