초기 커밋 - EV AS 관리 시스템

backend/utils.py

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+import os, uuid, qrcode
+from PIL import Image
+from fastapi import UploadFile
+
+UPLOAD_DIR = os.getenv("UPLOAD_DIR", "/uploads")
+
+def save_upload(file: UploadFile, sub_dir: str = "general") -> str:
+    """파일을 저장하고 /uploads 기준 상대 경로 반환"""
+    ext = os.path.splitext(file.filename or "file")[1].lower() or ".jpg"
+    folder = os.path.join(UPLOAD_DIR, sub_dir)
+    os.makedirs(folder, exist_ok=True)
+    filename = f"{uuid.uuid4().hex}{ext}"
+    filepath = os.path.join(folder, filename)
+    with open(filepath, "wb") as f:
+        f.write(file.file.read())
+    return f"/uploads/{sub_dir}/{filename}"
+
+def generate_qr(charger_id: str, domain: str) -> str:
+    """QR 이미지를 저장하고 /uploads 기준 경로 반환"""
+    url = f"https://{domain}/report/{charger_id}"
+    qr = qrcode.QRCode(version=1, box_size=10, border=4)
+    qr.add_data(url)
+    qr.make(fit=True)
+    img = qr.make_image(fill_color="black", back_color="white")
+    folder = os.path.join(UPLOAD_DIR, "qr")
+    os.makedirs(folder, exist_ok=True)
+    filepath = os.path.join(folder, f"{charger_id}.png")
+    img.save(filepath)
+    return f"/uploads/qr/{charger_id}.png"