dingdanquanliucheng/backend/app/services/export_service.py

import csv
from datetime import datetime
from pathlib import Path


class ExportService:
    def __init__(self) -> None:
        self.export_root = Path("D:/tmp/order-flow-exports")
        self.export_root.mkdir(parents=True, exist_ok=True)

    def build_performance_export(self, report: dict) -> dict:
        timestamp = datetime.now().strftime("%Y%m%d%H%M%S")
        suffix = report["stat_type"]
        file_name = f"performance-{suffix}-{timestamp}.csv"
        file_path = self.export_root / file_name

        with file_path.open("w", encoding="utf-8-sig", newline="") as csvfile:
            writer = csv.writer(csvfile)
            writer.writerow(["统计周期", "订单数", "订单金额", "固定提成", "分类明细"])
            for item in report["list"]:
                category_text = "；".join(
                    f"{category['category_name']}:{category['amount']:.2f}"
                    for category in item.get("category_amounts", [])
                )
                writer.writerow(
                    [
                        item["stat_period"],
                        item["order_count"],
                        f"{item['order_amount']:.2f}",
                        f"{item['commission_amount']:.2f}",
                        category_text,
                    ]
                )

        return {
            "file_name": file_name,
            "file_path": str(file_path),
            "file_size": file_path.stat().st_size,
            "content_type": "text/csv",
            "object_key": f"exports/performance/{file_name}",
        }


export_service = ExportService()