Ref #242 - Add RPSLObject support for overwriting new changed lines.

irrd/rpsl/parser.py

@@ -1,3 +1,4 @@
+import datetime
 import json
 import re
 from collections import OrderedDict, Counter
@@ -397,6 +398,45 @@ def _update_attribute_value(self, attribute, new_values):
             self._object_data.insert(insert_idx, (attribute, new_value, []))
             insert_idx += 1
 
+    def overwrite_date_new_changed_attributes(self, existing_obj=None) -> None:
+        """
+        Overwrite the date in any newly added changed attributes per #242.
+        Which changed attributes are new is determined by comparing to existing_obj,
+        which should be another RPSLObject, or None if all changed lines
+        should be considered new.
+        """
+        parsed_values_to_overwrite = set(self.parsed_data['changed']) - set(existing_obj.parsed_data['changed'])
+
+        new_object_data = []
+        overwritten_values_with_comment: List[Tuple[int, str]] = []
+        for idx, (attr_name, attr_value, continuation_chars) in enumerate(self._object_data):
+            if attr_name == 'changed':
+                attr_value_clean = attr_value.split('#')[0].strip()
+                if attr_value_clean in parsed_values_to_overwrite:
+                    overwritten_values_with_comment.append((idx, attr_value))
+                    continue
+            new_object_data.append((attr_name, attr_value, continuation_chars))
+        self._object_data = new_object_data
+
+        # As the value is already validated by RPSLChangedField,
+        # we can safely make assumptions on the format.
+        current_date = datetime.datetime.now().strftime('%Y%m%d')
+        for idx, value in overwritten_values_with_comment:
+            try:
+                content, comment = value.split('#')
+                content = content.strip()
+                comment = comment.strip()
+            except ValueError:
+                content = value.strip()
+                comment = ''
+            email = content.split(' ')[0]  # Ignore existing date
+            if comment:
+                new_value = f'{email} {current_date} # {comment}'
+            else:
+                new_value = f'{email} {current_date}'
+            self._object_data.insert(idx, ('changed', new_value, []))
+            self.messages.info(f'Set date in changed line "{value}" to today.')
+
     def __repr__(self):
         source = self.parsed_data.get('source', '')
         return f'{self.rpsl_object_class}/{self.pk()}/{source}'

irrd/rpsl/tests/test_rpsl_objects.py

@@ -1,3 +1,5 @@
+import datetime
+
 import pytest
 from IPy import IP
 from pytest import raises
@@ -478,3 +480,36 @@ def test_parse(self):
         ]
         assert obj.references_strong_inbound() == set()
         assert obj.render_rpsl_text() == rpsl_text
+
+
+class TestOverwriteDateNewChangedAttributes:
+    expected_date = datetime.datetime.now().strftime('%Y%m%d')
+
+    # This applies to all objects identically - only one test needed
+    def test_changed_line_overwrite_with_date_and_comment(self):
+        new_rpsl_text = self._generate_old_new_object('changed: new1@example.com 19980101#comment')
+        assert 'changed:        changed@example.com 20190701 # comment' in new_rpsl_text
+        assert f'changed:        new1@example.com {self.expected_date} # comment' in new_rpsl_text
+
+    def test_changed_line_overwrite_without_comment(self):
+        new_rpsl_text = self._generate_old_new_object('changed: new1@example.com 19980101')
+        assert 'changed:        changed@example.com 20190701 # comment' in new_rpsl_text
+        assert f'changed:        new1@example.com {self.expected_date}' in new_rpsl_text
+
+    def test_changed_line_overwrite_without_date_with_comment(self):
+        new_rpsl_text = self._generate_old_new_object('changed: new1@example.com#comment')
+        assert 'changed:        changed@example.com 20190701 # comment' in new_rpsl_text
+        assert f'changed:        new1@example.com {self.expected_date} # comment' in new_rpsl_text
+
+    def _generate_old_new_object(self, new_changed_line):
+        rpsl_text = object_sample_mapping[RPSLRouteSet().rpsl_object_class]
+        obj_current = rpsl_object_from_text(rpsl_text, strict_validation=True)
+
+        lines = rpsl_text.splitlines()
+        lines.insert(4, new_changed_line)
+        rpsl_text = '\n'.join(lines)
+        obj_new = rpsl_object_from_text(rpsl_text, strict_validation=True)
+
+        obj_new.overwrite_date_new_changed_attributes(obj_current)
+        assert f'Set date in changed line' in obj_new.messages.infos()[1]
+        return obj_new.render_rpsl_text()