fix: avoid overriding manual edits for newer entries

scripts/sync_translations.py

@@ -30,6 +30,19 @@
 ORGANIZATION_SLUG = 'open-edx'
 
 
+def parse_tx_date(date_str):
+    """
+    Parse a date string coming from Transifex into a datetime object.
+    """
+    if date_str:
+        if date_str.endswith('Z'):
+            date_str = date_str.replace('Z', '+00:00')
+
+        return datetime.fromisoformat(date_str)
+
+    return None
+
+
 class Command:
 
     workflow_file_path = '.github/workflows/sync-translations.yml'
@@ -118,25 +131,61 @@ def sync_translations(self, language_code, old_resource, new_resource):
         Sync specific language translations into the new Transifex resource.
         """
         print(' syncing', language_code, '...')
-        old_translations = {
+        translations_from_old_project = {
             self.get_translation_id(translation): translation
             for translation in self.get_translations(language_code=language_code, resource=old_resource)
         }
 
-        for new_translation in self.get_translations(language_code=language_code, resource=new_resource):
-            translation_id = self.get_translation_id(new_translation)
-            if old_translation := old_translations.get(translation_id):
-                updates = {}
-                for attr in ['reviewed', 'proofread', 'strings']:
-                    if old_attr_value := getattr(old_translation, attr, None):
-                        if old_attr_value != getattr(new_translation, attr, None):
-                            updates[attr] = old_attr_value
+        for current_translation in self.get_translations(language_code=language_code, resource=new_resource):
+            translation_id = self.get_translation_id(current_translation)
+            if translation_from_old_project := translations_from_old_project.get(translation_id):
+                self.sync_translation_entry(
+                    translation_from_old_project=translation_from_old_project,
+                    current_translation=current_translation,
+                )
 
-                if updates:
-                    print(translation_id, updates)
+    def sync_translation_entry(self, translation_from_old_project, current_translation):
+        """
+        Sync a single translation entry from the old project to the new one.
 
-                    if not self.is_dry_run():
-                        new_translation.save(**updates)
+        Return:
+            str: status code
+               - updated: if the entry was updated
+               - skipped: if the entry was skipped
+               - updated-dry-run: if the entry was updated in dry-run mode
+        """
+        translation_id = self.get_translation_id(current_translation)
+
+        updates = {}
+        for attr in ['reviewed', 'proofread', 'strings']:
+            if old_attr_value := getattr(translation_from_old_project, attr, None):
+                if old_attr_value != getattr(current_translation, attr, None):
+                    updates[attr] = old_attr_value
+
+        # Avoid overwriting more recent translations in the open-edx/openedx-translations project
+        newer_translation_found = False
+        old_project_translation_time = parse_tx_date(translation_from_old_project.datetime_translated)
+        current_translation_time = parse_tx_date(current_translation.datetime_translated)
+
+        if old_project_translation_time and current_translation_time:
+            newer_translation_found = current_translation_time > old_project_translation_time
+
+        if updates:
+            if newer_translation_found:
+                print(translation_id, updates,
+                    (
+                      f'[Skipped: current translation "{current_translation_time}" '
+                      f'is more recent than "{old_project_translation_time}"]'
+                    )
+                )
+                return 'skipped'
+            else:
+                print(translation_id, updates, '[Dry run]' if self.is_dry_run() else '')
+                if self.is_dry_run():
+                    return 'updated-dry-run'
+                else:
+                    current_translation.save(**updates)
+                    return 'updated'
 
     def sync_tags(self, old_resource, new_resource):
         """

scripts/tests/test_sync_translations.py

@@ -14,7 +14,11 @@
 from transifex.api.jsonapi.auth import BearerAuthentication
 
 from . import response_data
-from ..sync_translations import Command, ORGANIZATION_SLUG
+from ..sync_translations import (
+    Command,
+    ORGANIZATION_SLUG,
+    parse_tx_date,
+)
 
 HOST = transifex_api.HOST
 
@@ -34,6 +38,70 @@ def sync_command(**kwargs):
     return result
 
 
+@dataclass
+class ResourceStringMock:
+    """
+    String entry in Transifex.
+
+    Mock class for the transifex.api.ResourceString class.
+    """
+    key: str
+    context: str = ''
+
+
+@dataclass
+class ResourceTranslationMock:
+    """
+    Translation for an entry in Transifex.
+
+    Mock class for the transifex.api.ResourceTranslation class.
+    """
+    resource_string: ResourceStringMock
+    strings: dict
+    reviewed: bool
+    proofread: bool
+    datetime_translated: str
+
+    _updates: dict = None  # Last updates applied via `save()`
+
+    def save(self, **updates):
+        """
+        Mock ResourceTranslation.save() method.
+        """
+        self._updates = updates
+
+    @property
+    def updates(self):
+        """
+        Return the last updates applied via `save()`.
+        """
+        return self._updates
+
+    @classmethod
+    def factory(
+        cls,
+        key='key',
+        context='',
+        translation: Union[str, None] = 'dummy translation',
+        **kwargs
+    ):
+        mock_kwargs = dict(
+            resource_string=ResourceStringMock(
+                key=key,
+                context=context
+            ),
+            strings={
+                key: translation,
+            },
+            reviewed=False,
+            proofread=False,
+            datetime_translated='2021-01-01T00:00:00Z',
+        )
+
+        mock_kwargs.update(kwargs)
+        return cls(**mock_kwargs)
+
+
 @responses.activate
 def test_get_transifex_organization_projects():
     """
@@ -96,3 +164,153 @@ def test_get_translations():
     items = list(data)
     assert len(items) == 1
     assert items[0].id == response_data.RESPONSE_GET_LANGUAGE['data'][0]['id']
+
+
+def test_translations_entry_update_empty_translation():
+    """
+    Test updating an entry from old project where `current_translation` is empty.
+    """
+    command = sync_command(dry_run=False)
+
+    translation_from_old_project = ResourceTranslationMock.factory(
+        key='test_key',
+        translation='old translation',
+        reviewed=True,
+        datetime_translated='2023-01-01T00:00:00Z',
+    )
+
+    # Current translation is empty
+    current_translation = ResourceTranslationMock.factory(
+        key='test_key',
+        translation=None,
+        datetime_translated=None,
+    )
+
+    status = command.sync_translation_entry(
+        translation_from_old_project, current_translation
+    )
+
+    assert status == 'updated'
+    assert current_translation.updates == {
+        'strings': {
+            'test_key': 'old translation'
+        },
+        'reviewed': True,
+    }
+
+
+@pytest.mark.parametrize(
+    'old_project_date, current_translation_date, new_translation_str',
+    [
+        # As long as the current translation is _not_ more recent, it should be updated
+        (None, '2023-01-01T00:00:00Z', None),
+        (None, '2023-01-01T00:00:00Z', 'some translation'),
+        ('2023-01-01T00:00:00Z', '2023-01-01T00:00:00Z', 'some translation'),  # Same date
+        ('2023-01-01T00:00:00Z', '2021-01-01T00:00:00Z', 'some translation'),  # New project has newer date
+        ('2023-01-01T00:00:00Z', None, 'some translation'),
+        ('2023-01-01T00:00:00Z', None, None),
+    ]
+)
+def test_translations_entry_update_translation(old_project_date, current_translation_date, new_translation_str):
+    """
+    Test updating an entry from old project where `current_translation` is has outdated translation.
+    """
+    command = sync_command(dry_run=False)
+
+    translation_from_old_project = ResourceTranslationMock.factory(
+        key='test_key',
+        translation='old translation',
+        reviewed=True,
+        datetime_translated=old_project_date,
+    )
+
+    current_translation = ResourceTranslationMock.factory(
+        key='test_key',
+        translation=new_translation_str,
+        datetime_translated=current_translation_date,
+    )
+
+    status = command.sync_translation_entry(
+        translation_from_old_project, current_translation
+    )
+
+    assert status == 'updated'
+    assert current_translation.updates == {
+        'strings': {
+            'test_key': 'old translation'
+        },
+        'reviewed': True,
+    }
+
+
+def test_translations_entry_more_recent_translation():
+    """
+    Verify that the more recent translations in the open-edx/openedx-translations project are not overridden.
+    """
+    command = sync_command(dry_run=False)
+
+    translation_from_old_project = ResourceTranslationMock.factory(
+        key='test_key',
+        translation='one translation',
+        reviewed=True,
+        datetime_translated='2019-01-01T00:00:00Z',
+    )
+
+    # Current translation is empty
+    current_translation = ResourceTranslationMock.factory(
+        key='test_key',
+        translation='more recent translation',
+        datetime_translated='2023-01-01T00:00:00Z',
+    )
+
+    status = command.sync_translation_entry(
+        translation_from_old_project, current_translation
+    )
+
+    assert status == 'skipped'
+    assert not current_translation.updates, 'save() should not be called'
+
+
+def test_translations_entry_dry_run():
+    """
+    Verify that --dry-run option skips the save() call.
+    """
+    command = sync_command(dry_run=True)
+
+    translation_from_old_project = ResourceTranslationMock.factory(
+        key='test_key',
+        translation='old translation',
+        reviewed=True,
+        datetime_translated='2023-01-01T00:00:00Z',
+    )
+
+    current_translation = ResourceTranslationMock.factory(
+        key='test_key',
+        translation=None,
+        datetime_translated=None,
+    )
+
+    status = command.sync_translation_entry(
+        translation_from_old_project, current_translation
+    )
+
+    assert status == 'updated-dry-run'
+    assert not current_translation.updates, 'save() should not be called in --dry-run mode'
+
+
+@pytest.mark.parametrize(
+    "date_str, parse_result, test_message",
+    [
+        (None, None, 'None cannot be parsed'),
+        ('2023-01-01T00:00:00Z', datetime(2023, 1, 1, 0, 0, tzinfo=timezone.utc),
+         'Z suffix is replaced with the explict "+00:00" timezone'),
+        ('2023-01-01T00:00:00', datetime(2023, 1, 1, 0, 0),
+         'If there is no Z suffix, no timezone is added'),
+    ]
+)
+def test_parse_tx_date(date_str, parse_result, test_message):
+    """
+    Tests for parse_tx_date() helper function.
+    """
+    assert parse_tx_date(date_str) == parse_result, test_message
+