119 lines
4.0 KiB
Python
119 lines
4.0 KiB
Python
import os
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import uuid
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from typing import List
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import aiofiles
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from fastapi import UploadFile, HTTPException
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from starlette.responses import FileResponse
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from sqlalchemy.ext.asyncio import AsyncSession
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from werkzeug.utils import secure_filename
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from app.application.task_files_repository import TaskFilesRepository
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from app.application.tasks_repository import TasksRepository
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from app.domain.entities.task_files import ReadTaskFile
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from app.domain.models import TaskFile
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class TaskFilesService:
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def __init__(self, db: AsyncSession):
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self.task_files_repository = TaskFilesRepository(db)
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self.tasks_repository = TasksRepository(db)
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async def get_file_by_id(self, file_id: int) -> FileResponse:
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task_file = await self.task_files_repository.get_by_id(file_id)
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if not task_file:
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raise HTTPException(404, "Файл с таким ID не найден")
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return FileResponse(
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task_file.file_path,
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media_type=self.get_media_type(task_file.filename),
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filename=os.path.basename(task_file.filename),
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)
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async def get_files_list_by_task(self, task_id: int) -> List[ReadTaskFile]:
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task = await self.tasks_repository.get_by_id(task_id)
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if task is None:
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raise HTTPException(404, "Лекционный материал не найден")
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task_files = await self.task_files_repository.get_by_task_id(task_id)
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response = []
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for task_file in task_files:
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response.append(
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ReadTaskFile.model_validate(
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task_file
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)
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)
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return response
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async def upload_file(self, task_id: int, file: UploadFile) -> ReadTaskFile:
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task = await self.tasks_repository.get_by_id(task_id)
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if task is None:
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raise HTTPException(404, "Лекционный материал не найден")
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file_path = await self.save_file(file, f'uploads/tasks/{task.id}')
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task_file_model = TaskFile(
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filename=file.filename,
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file_path=file_path,
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task_id=task.id,
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)
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task_file_model = await self.task_files_repository.create(task_file_model)
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return ReadTaskFile.model_validate(task_file_model)
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async def delete_file(self, file_id: int) -> ReadTaskFile:
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task_file = await self.task_files_repository.get_by_id(file_id)
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if task_file is None:
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raise HTTPException(404, "Файл не найден")
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if not os.path.exists(task_file.file_path):
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raise HTTPException(404, "Файл не найден на диске")
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if os.path.exists(task_file.file_path):
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os.remove(task_file.file_path)
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task_file = await self.task_files_repository.delete(task_file)
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return ReadTaskFile.model_validate(task_file)
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async def save_file(self, file: UploadFile, upload_dir: str = 'uploads/tasks') -> str:
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os.makedirs(upload_dir, exist_ok=True)
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filename = self.generate_filename(file)
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file_path = os.path.join(upload_dir, filename)
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async with aiofiles.open(file_path, 'wb') as out_file:
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content = await file.read()
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await out_file.write(content)
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return file_path
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@staticmethod
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def generate_filename(file: UploadFile) -> str:
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return secure_filename(f"{uuid.uuid4()}_{file.filename}")
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@staticmethod
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def get_media_type(filename: str) -> str:
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extension = filename.split('.')[-1].lower()
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if extension in ['jpeg', 'jpg', 'png']:
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return f"image/{extension}"
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if extension == 'pdf':
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return "application/pdf"
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if extension in ['zip']:
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return "application/zip"
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if extension in ['doc', 'docx']:
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return "application/msword"
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if extension in ['xls', 'xlsx']:
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return "application/vnd.ms-excel"
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if extension in ['ppt', 'pptx']:
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return "application/vnd.ms-powerpoint"
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if extension in ['txt']:
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return "text/plain"
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return "application/octet-stream"
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