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# services/storage_service.py
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from sqlalchemy.ext.asyncio import AsyncSession
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from sqlalchemy import select, update
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from datetime import datetime
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import hashlib
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import json
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from pathlib import Path
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from typing import Optional, Dict, Any
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from models.database import STPFile, GeometryData, HTMLFile, ProcessingTask
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from utils.logger import get_logger
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from models.database import MoldCavityData
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logger = get_logger(__name__)
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class StorageService:
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"""数据存储服务"""
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def __init__(self, db_session: AsyncSession):
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self.db_session = db_session
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async def save_stp_file(
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self,
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filename: str,
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file_path: str,
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file_size: int,
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file_content: Optional[bytes] = None
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) -> STPFile:
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"""保存STP文件信息到数据库"""
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try:
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# 计算文件哈希
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file_hash = self._calculate_file_hash(file_path, file_content)
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# 检查是否已存在相同文件
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existing_file = await self.db_session.execute(
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select(STPFile).where(STPFile.file_hash == file_hash)
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)
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existing_file = existing_file.scalar_one_or_none()
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if existing_file:
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logger.info(f"文件已存在，跳过保存: {filename}")
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return existing_file
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# 创建新的STP文件记录
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stp_file = STPFile(
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filename=filename,
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original_filename=filename,
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file_path=file_path,
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file_size=file_size,
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file_hash=file_hash,
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file_content=file_content,
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upload_time=datetime.now(),
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status="pending",
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# 必填字段提供默认值
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object_key=f"stp_files/{file_hash}",
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storage_bucket="default",
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object_url=None
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)
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self.db_session.add(stp_file)
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await self.db_session.commit()
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await self.db_session.refresh(stp_file)
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logger.info(f"STP文件保存成功: {filename} (ID: {stp_file.id})")
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return stp_file
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except Exception as e:
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await self.db_session.rollback()
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logger.error(f"保存STP文件失败: {e}")
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raise
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async def save_geometry_data(
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self,
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stp_file_id: int,
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geometry_json: Dict[str, Any],
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analysis_method: str
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) -> GeometryData:
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"""保存几何数据JSON到数据库"""
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try:
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# 提取关键几何属性用于快速查询
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volume = geometry_json.get("volume")
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surface_area = geometry_json.get("surface_area")
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bounding_box = geometry_json.get("bounding_box", {})
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geometry_data = GeometryData(
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stp_file_id=stp_file_id,
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analysis_method=analysis_method,
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volume=volume,
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surface_area=surface_area,
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bounding_box_min=bounding_box.get("min"),
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bounding_box_max=bounding_box.get("max"),
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created_time=datetime.now(),
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# 必填字段提供默认值
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object_key=f"geometry_data/{stp_file_id}",
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storage_bucket="default",
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object_url=None
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)
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self.db_session.add(geometry_data)
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await self.db_session.commit()
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await self.db_session.refresh(geometry_data)
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logger.info(f"几何数据保存成功: STP文件ID {stp_file_id}")
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return geometry_data
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except Exception as e:
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await self.db_session.rollback()
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logger.error(f"保存几何数据失败: {e}")
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raise
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async def save_html_file(
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self,
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stp_file_id: int,
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filename: str,
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file_path: str,
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html_content: Optional[str] = None,
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visualization_type: str = "3d_viewer"
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) -> HTMLFile:
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"""保存HTML文件信息到数据库"""
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try:
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html_file = HTMLFile(
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stp_file_id=stp_file_id,
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filename=filename,
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file_path=file_path,
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html_content=html_content,
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visualization_type=visualization_type,
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has_interactive_elements=True,
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generated_time=datetime.now(),
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# 必填字段提供默认值
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object_key=f"html_files/{stp_file_id}",
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storage_bucket="default",
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object_url=None
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)
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self.db_session.add(html_file)
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await self.db_session.commit()
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await self.db_session.refresh(html_file)
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logger.info(f"HTML文件保存成功: {filename} (STP文件ID: {stp_file_id})")
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return html_file
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except Exception as e:
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await self.db_session.rollback()
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logger.error(f"保存HTML文件失败: {e}")
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raise
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async def create_processing_task(
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self,
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task_id: str,
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stp_file_id: int,
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task_type: str = "stp_parsing"
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) -> ProcessingTask:
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"""创建处理任务记录"""
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try:
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task = ProcessingTask(
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task_id=task_id,
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stp_file_id=stp_file_id,
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task_type=task_type,
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status="pending",
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started_time=datetime.now()
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)
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self.db_session.add(task)
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await self.db_session.commit()
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await self.db_session.refresh(task)
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logger.info(f"处理任务创建成功: {task_id}")
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return task
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except Exception as e:
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await self.db_session.rollback()
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logger.error(f"创建处理任务失败: {e}")
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raise
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async def update_task_status(
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self,
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task_id: str,
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status: str,
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progress: Optional[int] = None,
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current_step: Optional[str] = None,
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error_message: Optional[str] = None
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):
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"""更新任务状态"""
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try:
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update_data = {
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"status": status,
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"completed_time": datetime.now() if status in ["completed", "failed"] else None,
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"error_message": error_message
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}
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if progress is not None:
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update_data["progress"] = progress
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if current_step is not None:
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update_data["current_step"] = current_step
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await self.db_session.execute(
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update(ProcessingTask)
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.where(ProcessingTask.task_id == task_id)
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.values(**update_data)
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)
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await self.db_session.commit()
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logger.info(f"任务状态更新: {task_id} -> {status}")
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except Exception as e:
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await self.db_session.rollback()
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logger.error(f"更新任务状态失败: {e}")
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raise
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async def update_stp_file_status(self, stp_file_id: int, status: str):
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"""更新STP文件状态"""
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try:
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await self.db_session.execute(
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update(STPFile)
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.where(STPFile.id == stp_file_id)
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.values(
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status=status,
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processed_time=datetime.now() if status in ["completed", "failed"] else None
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)
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)
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await self.db_session.commit()
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logger.info(f"STP文件状态更新: ID {stp_file_id} -> {status}")
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except Exception as e:
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await self.db_session.rollback()
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logger.error(f"更新STP文件状态失败: {e}")
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raise
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async def get_stp_file_by_id(self, stp_file_id: int) -> Optional[STPFile]:
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"""根据ID获取STP文件"""
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try:
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result = await self.db_session.execute(
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select(STPFile).where(STPFile.id == stp_file_id)
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)
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return result.scalar_one_or_none()
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except Exception as e:
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logger.error(f"获取STP文件失败: {e}")
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return None
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async def get_geometry_data_by_stp_file_id(self, stp_file_id: int) -> Optional[GeometryData]:
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"""根据STP文件ID获取几何数据"""
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try:
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result = await self.db_session.execute(
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select(GeometryData).where(GeometryData.stp_file_id == stp_file_id)
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)
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return result.scalar_one_or_none()
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except Exception as e:
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logger.error(f"获取几何数据失败: {e}")
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return None
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def _calculate_file_hash(self, file_path: str, file_content: Optional[bytes] = None) -> str:
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"""计算文件哈希值"""
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sha256_hash = hashlib.sha256()
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if file_content:
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sha256_hash.update(file_content)
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else:
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# 从文件路径读取内容计算哈希
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with open(file_path, "rb") as f:
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for chunk in iter(lambda: f.read(4096), b""):
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sha256_hash.update(chunk)
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return sha256_hash.hexdigest()
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async def save_mold_cavity_data(
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self,
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stp_file_id: int,
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cavity_json: Dict[str, Any],
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key_info: Dict[str, Any]
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) -> MoldCavityData:
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"""保存模具型腔数据"""
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try:
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mold_data = MoldCavityData(
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stp_file_id=stp_file_id,
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cavity_key_info=key_info,
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shrinkage_rate=cavity_json["metadata"]["shrinkage_rate"],
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draft_angle=cavity_json["metadata"]["draft_angle"],
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generated_time=datetime.now(),
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# 必填字段提供默认值
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detailed_object_key=f"mold_cavity/{stp_file_id}",
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storage_bucket="default"
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)
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self.db_session.add(mold_data)
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await self.db_session.commit()
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await self.db_session.refresh(mold_data)
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logger.info(f"模具型腔数据保存成功: STP文件ID {stp_file_id}")
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return mold_data
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except Exception as e:
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await self.db_session.rollback()
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logger.error(f"保存模具型腔数据失败: {e}")
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raise
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