feat: add S3Path

pydantic_extra_types/s3.py

@@ -0,0 +1,45 @@
+"""
+The `pydantic_extra_types.s3` module provides the
+[`S3Path`][pydantic_extra_types.s3.S3Path] data type.
+
+A simpleAWS S3 URLs parser.
+It also provides the `Bucket`, `Key` component.
+"""
+
+from __future__ import annotations
+
+import re
+from typing import Any, ClassVar, Type
+
+from pydantic import GetCoreSchemaHandler
+from pydantic_core import core_schema
+
+
+class S3Path(str):
+    patt: ClassVar[str] = r'^s3://([^/]+)/(.*?([^/]+)/?)$'
+
+    def __init__(self, value: str) -> None:
+        self.value = value
+        groups: tuple[str, str, str] = re.match(self.patt, self.value).groups()  # type: ignore
+        self.bucket: str = groups[0]
+        self.key: str = groups[1]
+        self.last_key: str = groups[2]
+
+    def __str__(self) -> str:  # pragma: no cover
+        return self.value
+
+    def __repr__(self) -> str:  # pragma: no cover
+        return f'{self.__class__.__name__}({self.value!r})'
+
+    @classmethod
+    def _validate(cls, __input_value: str, _: core_schema.ValidationInfo) -> S3Path:
+        return cls(__input_value)
+
+    @classmethod
+    def __get_pydantic_core_schema__(cls, source: Type[Any], handler: GetCoreSchemaHandler) -> core_schema.CoreSchema:
+        _, _ = source, handler
+        return core_schema.with_info_after_validator_function(
+            cls._validate,
+            core_schema.str_schema(pattern=cls.patt),
+            field_name=cls.__class__.__name__,
+        )

tests/test_s3.py

@@ -0,0 +1,152 @@
+import pytest
+from pydantic import BaseModel, ValidationError
+
+from pydantic_extra_types.s3 import S3Path
+
+
+class S3Check(BaseModel):
+    path: S3Path
+
+
+@pytest.mark.parametrize(
+    'raw,bucket,key,last_key',
+    [
+        (
+            's3://my-data-bucket/2023/08/29/sales-report.csv',
+            'my-data-bucket',
+            '2023/08/29/sales-report.csv',
+            'sales-report.csv',
+        ),
+        (
+            's3://logs-bucket/app-logs/production/2024/07/01/application-log.txt',
+            'logs-bucket',
+            'app-logs/production/2024/07/01/application-log.txt',
+            'application-log.txt',
+        ),
+        (
+            's3://backup-storage/user_data/john_doe/photos/photo-2024-08-15.jpg',
+            'backup-storage',
+            'user_data/john_doe/photos/photo-2024-08-15.jpg',
+            'photo-2024-08-15.jpg',
+        ),
+        (
+            's3://analytics-bucket/weekly-reports/Q3/2023/week-35-summary.pdf',
+            'analytics-bucket',
+            'weekly-reports/Q3/2023/week-35-summary.pdf',
+            'week-35-summary.pdf',
+        ),
+        (
+            's3://project-data/docs/presentations/quarterly_review.pptx',
+            'project-data',
+            'docs/presentations/quarterly_review.pptx',
+            'quarterly_review.pptx',
+        ),
+        (
+            's3://my-music-archive/genres/rock/2024/favorite-songs.mp3',
+            'my-music-archive',
+            'genres/rock/2024/favorite-songs.mp3',
+            'favorite-songs.mp3',
+        ),
+        (
+            's3://video-uploads/movies/2024/03/action/thriller/movie-trailer.mp4',
+            'video-uploads',
+            'movies/2024/03/action/thriller/movie-trailer.mp4',
+            'movie-trailer.mp4',
+        ),
+        (
+            's3://company-files/legal/contracts/contract-2023-09-01.pdf',
+            'company-files',
+            'legal/contracts/contract-2023-09-01.pdf',
+            'contract-2023-09-01.pdf',
+        ),
+        (
+            's3://dev-environment/source-code/release_v1.0.2.zip',
+            'dev-environment',
+            'source-code/release_v1.0.2.zip',
+            'release_v1.0.2.zip',
+        ),
+        (
+            's3://public-bucket/open-data/geojson/maps/city_boundaries.geojson',
+            'public-bucket',
+            'open-data/geojson/maps/city_boundaries.geojson',
+            'city_boundaries.geojson',
+        ),
+        (
+            's3://image-storage/2024/portfolio/shoots/wedding/couple_photo_12.jpg',
+            'image-storage',
+            '2024/portfolio/shoots/wedding/couple_photo_12.jpg',
+            'couple_photo_12.jpg',
+        ),
+        (
+            's3://finance-data/reports/2024/Q2/income_statement.xlsx',
+            'finance-data',
+            'reports/2024/Q2/income_statement.xlsx',
+            'income_statement.xlsx',
+        ),
+        (
+            's3://training-data/nlp/corpora/english/2023/text_corpus.txt',
+            'training-data',
+            'nlp/corpora/english/2023/text_corpus.txt',
+            'text_corpus.txt',
+        ),
+        (
+            's3://ecommerce-backup/2024/transactions/august/orders_2024_08_28.csv',
+            'ecommerce-backup',
+            '2024/transactions/august/orders_2024_08_28.csv',
+            'orders_2024_08_28.csv',
+        ),
+        (
+            's3://gaming-assets/3d_models/characters/hero/model_v5.obj',
+            'gaming-assets',
+            '3d_models/characters/hero/model_v5.obj',
+            'model_v5.obj',
+        ),
+        (
+            's3://iot-sensor-data/2024/temperature_sensors/sensor_42_readings.csv',
+            'iot-sensor-data',
+            '2024/temperature_sensors/sensor_42_readings.csv',
+            'sensor_42_readings.csv',
+        ),
+        (
+            's3://user-uploads/avatars/user123/avatar_2024_08_29.png',
+            'user-uploads',
+            'avatars/user123/avatar_2024_08_29.png',
+            'avatar_2024_08_29.png',
+        ),
+        (
+            's3://media-library/podcasts/2023/episode_45.mp3',
+            'media-library',
+            'podcasts/2023/episode_45.mp3',
+            'episode_45.mp3',
+        ),
+        (
+            's3://logs-bucket/security/firewall-logs/2024/08/failed_attempts.log',
+            'logs-bucket',
+            'security/firewall-logs/2024/08/failed_attempts.log',
+            'failed_attempts.log',
+        ),
+        (
+            's3://data-warehouse/financials/quarterly/2024/Q1/profit_loss.csv',
+            'data-warehouse',
+            'financials/quarterly/2024/Q1/profit_loss.csv',
+            'profit_loss.csv',
+        ),
+        (
+            's3://data-warehouse/financials/quarterly/2024/Q1',
+            'data-warehouse',
+            'financials/quarterly/2024/Q1',
+            'Q1',
+        ),
+    ],
+)
+def test_s3(raw: str, bucket: str, key: str, last_key: str):
+    model = S3Check(path=raw)
+    assert model.path == S3Path(raw)
+    assert model.path.bucket == bucket
+    assert model.path.key == key
+    assert model.path.last_key == last_key
+
+
+def test_wrong_s3():
+    with pytest.raises(ValidationError):
+        S3Check(path='s3/ok')