feat: add support for 'Blob.custom_time' and lifecycle rules (googlea…

…pis#199)

* feat(storage): add support of custom time metadata and timestamp

* feat(storage): change the return type of custom_time_before

* feat(storage): add setter method

* feat(storage): add test for None value

* feat(storage): changes in unittest

* feat(storage): change custom_time type to date

* feat: change custom_time to datetime

* feat: nit

Co-authored-by: Jonathan Lui <jonathanlui@google.com>
Co-authored-by: Tres Seaver <tseaver@palladion.com>
Co-authored-by: Frank Natividad <frankyn@users.noreply.github.com>

google/cloud/storage/blob.py

@@ -52,6 +52,7 @@
 from google.api_core.iam import Policy
 from google.cloud import exceptions
 from google.cloud._helpers import _bytes_to_unicode
+from google.cloud._helpers import _datetime_to_rfc3339
 from google.cloud._helpers import _rfc3339_to_datetime
 from google.cloud._helpers import _to_bytes
 from google.cloud.exceptions import NotFound
@@ -3348,6 +3349,39 @@ def updated(self):
         if value is not None:
             return _rfc3339_to_datetime(value)
 
+    @property
+    def custom_time(self):
+        """Retrieve the custom time for the object.
+
+        See https://cloud.google.com/storage/docs/json_api/v1/objects
+
+        :rtype: :class:`datetime.datetime` or ``NoneType``
+        :returns: Datetime object parsed from RFC3339 valid timestamp, or
+                  ``None`` if the blob's resource has not been loaded from
+                  the server (see :meth:`reload`).
+        """
+        value = self._properties.get("customTime")
+        if value is not None:
+            return _rfc3339_to_datetime(value)
+
+    @custom_time.setter
+    def custom_time(self, value):
+        """Set the custom time for the object. Once set it can't be unset
+        and only changed to a custom datetime in the future. If the
+        custom_time must be unset, you must either perform a rewrite operation
+        or upload the data again.
+
+        See https://cloud.google.com/storage/docs/json_api/v1/objects
+
+        :type value: :class:`datetime.datetime`
+        :param value: (Optional) Set the custom time of blob. Datetime object
+                      parsed from RFC3339 valid timestamp.
+        """
+        if value is not None:
+            value = _datetime_to_rfc3339(value)
+
+        self._properties["customTime"] = value
+
 
 def _get_encryption_headers(key, source=False):
     """Builds customer encryption key headers

google/cloud/storage/bucket.py

@@ -170,6 +170,18 @@ class LifecycleRuleConditions(dict):
     :param number_of_newer_versions: (Optional) Apply rule action to versioned
                                      items having N newer versions.
 
+    :type days_since_custom_time: int
+    :param days_since_custom_time: (Optional) Apply rule action to items whose number of days
+                                   elapsed since the custom timestamp. This condition is relevant
+                                   only for versioned objects. The value of the field must be a non
+                                   negative integer. If it's zero, the object version will become
+                                   eligible for lifecycle action as soon as it becomes custom.
+
+    :type custom_time_before: :class:`datetime.date`
+    :param custom_time_before: (Optional)  Date object parsed from RFC3339 valid date, apply rule action
+                               to items whose custom time is before this date. This condition is relevant
+                               only for versioned objects, e.g., 2019-03-16.
+
     :type days_since_noncurrent_time: int
     :param days_since_noncurrent_time: (Optional) Apply rule action to items whose number of days
                                         elapsed since the non current timestamp. This condition
@@ -193,6 +205,8 @@ def __init__(
         is_live=None,
         matches_storage_class=None,
         number_of_newer_versions=None,
+        days_since_custom_time=None,
+        custom_time_before=None,
         days_since_noncurrent_time=None,
         noncurrent_time_before=None,
         _factory=False,
@@ -214,6 +228,12 @@ def __init__(
         if number_of_newer_versions is not None:
             conditions["numNewerVersions"] = number_of_newer_versions
 
+        if days_since_custom_time is not None:
+            conditions["daysSinceCustomTime"] = days_since_custom_time
+
+        if custom_time_before is not None:
+            conditions["customTimeBefore"] = custom_time_before.isoformat()
+
         if not _factory and not conditions:
             raise ValueError("Supply at least one condition")
 
@@ -266,6 +286,18 @@ def number_of_newer_versions(self):
         """Conditon's 'number_of_newer_versions' value."""
         return self.get("numNewerVersions")
 
+    @property
+    def days_since_custom_time(self):
+        """Conditon's 'days_since_custom_time' value."""
+        return self.get("daysSinceCustomTime")
+
+    @property
+    def custom_time_before(self):
+        """Conditon's 'custom_time_before' value."""
+        before = self.get("customTimeBefore")
+        if before is not None:
+            return datetime_helpers.from_iso8601_date(before)
+
     @property
     def days_since_noncurrent_time(self):
         """Conditon's 'days_since_noncurrent_time' value."""

tests/system/test_system.py

@@ -196,18 +196,21 @@ def test_lifecycle_rules(self):
         from google.cloud.storage import constants
 
         new_bucket_name = "w-lifcycle-rules" + unique_resource_id("-")
+        custom_time_before = datetime.date(2018, 8, 1)
         noncurrent_before = datetime.date(2018, 8, 1)
+
         self.assertRaises(
             exceptions.NotFound, Config.CLIENT.get_bucket, new_bucket_name
         )
         bucket = Config.CLIENT.bucket(new_bucket_name)
         bucket.add_lifecycle_delete_rule(
             age=42,
             number_of_newer_versions=3,
+            days_since_custom_time=2,
+            custom_time_before=custom_time_before,
             days_since_noncurrent_time=2,
             noncurrent_time_before=noncurrent_before,
         )
-
         bucket.add_lifecycle_set_storage_class_rule(
             constants.COLDLINE_STORAGE_CLASS,
             is_live=False,
@@ -218,6 +221,8 @@ def test_lifecycle_rules(self):
             LifecycleRuleDelete(
                 age=42,
                 number_of_newer_versions=3,
+                days_since_custom_time=2,
+                custom_time_before=custom_time_before,
                 days_since_noncurrent_time=2,
                 noncurrent_time_before=noncurrent_before,
             ),

tests/unit/test_blob.py

@@ -157,6 +157,7 @@ def _set_properties_helper(self, kms_key_name=None):
             "crc32c": CRC32C,
             "componentCount": COMPONENT_COUNT,
             "etag": ETAG,
+            "customTime": NOW,
         }
 
         if kms_key_name is not None:
@@ -188,6 +189,7 @@ def _set_properties_helper(self, kms_key_name=None):
         self.assertEqual(blob.crc32c, CRC32C)
         self.assertEqual(blob.component_count, COMPONENT_COUNT)
         self.assertEqual(blob.etag, ETAG)
+        self.assertEqual(blob.custom_time, now)
 
         if kms_key_name is not None:
             self.assertEqual(blob.kms_key_name, kms_key_name)
@@ -4248,6 +4250,48 @@ def test_updated_unset(self):
         blob = self._make_one("blob-name", bucket=BUCKET)
         self.assertIsNone(blob.updated)
 
+    def test_custom_time_getter(self):
+        from google.cloud._helpers import _RFC3339_MICROS
+        from google.cloud._helpers import UTC
+
+        BLOB_NAME = "blob-name"
+        bucket = _Bucket()
+        TIMESTAMP = datetime.datetime(2014, 11, 5, 20, 34, 37, tzinfo=UTC)
+        TIME_CREATED = TIMESTAMP.strftime(_RFC3339_MICROS)
+        properties = {"customTime": TIME_CREATED}
+        blob = self._make_one(BLOB_NAME, bucket=bucket, properties=properties)
+        self.assertEqual(blob.custom_time, TIMESTAMP)
+
+    def test_custom_time_setter(self):
+        from google.cloud._helpers import UTC
+
+        BLOB_NAME = "blob-name"
+        bucket = _Bucket()
+        TIMESTAMP = datetime.datetime(2014, 11, 5, 20, 34, 37, tzinfo=UTC)
+        blob = self._make_one(BLOB_NAME, bucket=bucket)
+        self.assertIsNone(blob.custom_time)
+        blob.custom_time = TIMESTAMP
+        self.assertEqual(blob.custom_time, TIMESTAMP)
+
+    def test_custom_time_setter_none_value(self):
+        from google.cloud._helpers import _RFC3339_MICROS
+        from google.cloud._helpers import UTC
+
+        BLOB_NAME = "blob-name"
+        bucket = _Bucket()
+        TIMESTAMP = datetime.datetime(2014, 11, 5, 20, 34, 37, tzinfo=UTC)
+        TIME_CREATED = TIMESTAMP.strftime(_RFC3339_MICROS)
+        properties = {"customTime": TIME_CREATED}
+        blob = self._make_one(BLOB_NAME, bucket=bucket, properties=properties)
+        self.assertEqual(blob.custom_time, TIMESTAMP)
+        blob.custom_time = None
+        self.assertIsNone(blob.custom_time)
+
+    def test_custom_time_unset(self):
+        BUCKET = object()
+        blob = self._make_one("blob-name", bucket=BUCKET)
+        self.assertIsNone(blob.custom_time)
+
     def test_from_string_w_valid_uri(self):
         from google.cloud.storage.blob import Blob
 

tests/unit/test_bucket.py

@@ -77,6 +77,8 @@ def test_ctor_w_created_before_and_is_live(self):
         self.assertEqual(conditions.is_live, False)
         self.assertIsNone(conditions.matches_storage_class)
         self.assertIsNone(conditions.number_of_newer_versions)
+        self.assertIsNone(conditions.days_since_custom_time)
+        self.assertIsNone(conditions.custom_time_before)
         self.assertIsNone(conditions.noncurrent_time_before)
 
     def test_ctor_w_number_of_newer_versions(self):
@@ -89,6 +91,19 @@ def test_ctor_w_number_of_newer_versions(self):
         self.assertIsNone(conditions.matches_storage_class)
         self.assertEqual(conditions.number_of_newer_versions, 3)
 
+    def test_ctor_w_days_since_custom_time(self):
+        conditions = self._make_one(
+            number_of_newer_versions=3, days_since_custom_time=2
+        )
+        expected = {"numNewerVersions": 3, "daysSinceCustomTime": 2}
+        self.assertEqual(dict(conditions), expected)
+        self.assertIsNone(conditions.age)
+        self.assertIsNone(conditions.created_before)
+        self.assertIsNone(conditions.is_live)
+        self.assertIsNone(conditions.matches_storage_class)
+        self.assertEqual(conditions.number_of_newer_versions, 3)
+        self.assertEqual(conditions.days_since_custom_time, 2)
+
     def test_ctor_w_days_since_noncurrent_time(self):
         conditions = self._make_one(
             number_of_newer_versions=3, days_since_noncurrent_time=2
@@ -102,6 +117,25 @@ def test_ctor_w_days_since_noncurrent_time(self):
         self.assertEqual(conditions.number_of_newer_versions, 3)
         self.assertEqual(conditions.days_since_noncurrent_time, 2)
 
+    def test_ctor_w_custom_time_before(self):
+        import datetime
+
+        custom_time_before = datetime.date(2018, 8, 1)
+        conditions = self._make_one(
+            number_of_newer_versions=3, custom_time_before=custom_time_before
+        )
+        expected = {
+            "numNewerVersions": 3,
+            "customTimeBefore": custom_time_before.isoformat(),
+        }
+        self.assertEqual(dict(conditions), expected)
+        self.assertIsNone(conditions.age)
+        self.assertIsNone(conditions.created_before)
+        self.assertIsNone(conditions.is_live)
+        self.assertIsNone(conditions.matches_storage_class)
+        self.assertEqual(conditions.number_of_newer_versions, 3)
+        self.assertEqual(conditions.custom_time_before, custom_time_before)
+
     def test_ctor_w_noncurrent_time_before(self):
         import datetime
 
@@ -125,16 +159,18 @@ def test_ctor_w_noncurrent_time_before(self):
     def test_from_api_repr(self):
         import datetime
 
+        custom_time_before = datetime.date(2018, 8, 1)
         noncurrent_before = datetime.date(2018, 8, 1)
         before = datetime.date(2018, 8, 1)
         klass = self._get_target_class()
-
         resource = {
             "age": 10,
             "createdBefore": "2018-08-01",
             "isLive": True,
             "matchesStorageClass": ["COLDLINE"],
             "numNewerVersions": 3,
+            "daysSinceCustomTime": 2,
+            "customTimeBefore": custom_time_before.isoformat(),
             "daysSinceNoncurrentTime": 2,
             "noncurrentTimeBefore": noncurrent_before.isoformat(),
         }
@@ -144,6 +180,8 @@ def test_from_api_repr(self):
         self.assertEqual(conditions.is_live, True)
         self.assertEqual(conditions.matches_storage_class, ["COLDLINE"])
         self.assertEqual(conditions.number_of_newer_versions, 3)
+        self.assertEqual(conditions.days_since_custom_time, 2)
+        self.assertEqual(conditions.custom_time_before, custom_time_before)
         self.assertEqual(conditions.days_since_noncurrent_time, 2)
         self.assertEqual(conditions.noncurrent_time_before, noncurrent_before)