Update project 2nd iteration

backend/core/minio.py

@@ -0,0 +1,50 @@
+import os
+from contextlib import asynccontextmanager
+from typing import AsyncIterator
+
+import aioboto3
+from botocore.exceptions import ClientError
+
+MINIO_ENDPOINT: str = os.getenv("MINIO_ENDPOINT", "http://minio:9000")
+MINIO_ACCESS_KEY: str = os.getenv("MINIO_ACCESS_KEY", "minioadmin")
+MINIO_SECRET_KEY: str = os.getenv("MINIO_SECRET_KEY", "minioadminpassword")
+MINIO_BUCKET: str = os.getenv("MINIO_BUCKET", "tickets-media")
+
+_session = aioboto3.Session()
+
+
+@asynccontextmanager
+async def _s3_client() -> AsyncIterator:
+    async with _session.client(
+        "s3",
+        endpoint_url=MINIO_ENDPOINT,
+        aws_access_key_id=MINIO_ACCESS_KEY,
+        aws_secret_access_key=MINIO_SECRET_KEY,
+        region_name="us-east-1",  # MinIO не требует региона, но boto3 обязывает передать
+    ) as client:
+        yield client
+
+
+async def ensure_bucket_exists() -> None:
+    """Создаёт бакет при старте воркера, если он ещё не существует."""
+    async with _s3_client() as client:
+        try:
+            await client.head_bucket(Bucket=MINIO_BUCKET)
+        except ClientError as exc:
+            error_code = exc.response["Error"]["Code"]
+            if error_code in ("404", "NoSuchBucket"):
+                await client.create_bucket(Bucket=MINIO_BUCKET)
+            else:
+                raise
+
+
+async def upload_pdf(object_name: str, pdf_bytes: bytes) -> str:
+    """Загружает PDF в MinIO и возвращает публичный URL объекта."""
+    async with _s3_client() as client:
+        await client.put_object(
+            Bucket=MINIO_BUCKET,
+            Key=object_name,
+            Body=pdf_bytes,
+            ContentType="application/pdf",
+        )
+    return f"{MINIO_ENDPOINT}/{MINIO_BUCKET}/{object_name}"