Initial commit: svg backend

backend/app/services/storage.py

@@ -0,0 +1,49 @@
+from __future__ import annotations
+
+from pathlib import Path
+from uuid import uuid4
+
+from app.core.config import settings
+
+
+def _ensure_dir(path: str) -> Path:
+    dir_path = Path(path)
+    dir_path.mkdir(parents=True, exist_ok=True)
+    return dir_path
+
+
+def save_original_svg(*, filename: str, content: bytes) -> tuple[str, str]:
+    upload_id = uuid4().hex
+    target_dir = _ensure_dir(f"{settings.storage_original_dir}/{upload_id}")
+    target_path = target_dir / filename
+    target_path.write_bytes(content)
+    return upload_id, str(target_path)
+
+
+def save_sanitized_svg(*, upload_id: str, filename: str, content: bytes) -> str:
+    target_dir = _ensure_dir(f"{settings.storage_sanitized_dir}/{upload_id}")
+    target_path = target_dir / filename
+    target_path.write_bytes(content)
+    return str(target_path)
+
+
+def save_normalized_json(*, upload_id: str, filename: str, content: str) -> str:
+    target_dir = _ensure_dir(f"{settings.storage_normalized_dir}/{upload_id}")
+    target_path = target_dir / f"{Path(filename).stem}.normalized.json"
+    target_path.write_text(content, encoding="utf-8")
+    return str(target_path)
+
+
+def save_display_svg(*, upload_id: str, filename: str, content: bytes) -> str:
+    target_dir = _ensure_dir(f"{settings.storage_display_dir}/{upload_id}")
+    target_path = target_dir / f"{Path(filename).stem}.display.svg"
+    target_path.write_bytes(content)
+    return str(target_path)
+
+
+def load_normalized_json(upload_id: str) -> str:
+    target_dir = Path(f"{settings.storage_normalized_dir}/{upload_id}")
+    files = sorted(target_dir.glob("*.normalized.json"))
+    if not files:
+        raise FileNotFoundError(f"Normalized payload not found for upload_id={upload_id}")
+    return files[-1].read_text(encoding="utf-8")