115 lines
3.4 KiB
Python
115 lines
3.4 KiB
Python
import mimetypes
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from fastapi import HTTPException
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import os, asyncio
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from typing import List, Optional, Tuple
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import pdfplumber
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from constants.documents import (
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PDF_MIME_TYPES,
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POWERPOINT_TYPES,
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TEXT_MIME_TYPES,
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WORD_TYPES,
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)
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from services.docling_service import DoclingService
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class DocumentsLoader:
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def __init__(self, file_paths: List[str]):
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self._file_paths = file_paths
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self.docling_service = DoclingService()
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self._documents: List[str] = []
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self._images: List[List[str]] = []
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@property
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def documents(self):
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return self._documents
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@property
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def images(self):
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return self._images
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async def load_documents(
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self,
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temp_dir: Optional[str] = None,
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load_text: bool = True,
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load_images: bool = False,
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):
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"""If load_images is True, temp_dir must be provided"""
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documents: List[str] = []
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images: List[str] = []
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for file_path in self._file_paths:
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if not os.path.exists(file_path):
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raise HTTPException(
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status_code=404, detail=f"File {file_path} not found"
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)
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document = ""
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imgs = []
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mime_type = mimetypes.guess_type(file_path)[0]
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if mime_type in PDF_MIME_TYPES:
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document, imgs = await self.load_pdf(
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file_path, load_text, load_images, temp_dir
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)
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elif mime_type in TEXT_MIME_TYPES:
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document = await self.load_text(file_path)
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elif mime_type in POWERPOINT_TYPES:
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document = self.load_powerpoint(file_path)
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elif mime_type in WORD_TYPES:
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document = self.load_msword(file_path)
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documents.append(document)
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images.append(imgs)
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self._documents = documents
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self._images = images
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async def load_pdf(
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self,
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file_path: str,
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load_text: bool,
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load_images: bool,
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temp_dir: Optional[str] = None,
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) -> Tuple[str, List[str]]:
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image_paths = []
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document: str = ""
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if load_text:
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document = self.docling_service.parse_to_markdown(file_path)
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if load_images:
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image_paths = await self.get_page_images_from_pdf_async(file_path, temp_dir)
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return document, image_paths
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async def load_text(self, file_path: str) -> str:
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with open(file_path, "r") as file:
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return await asyncio.to_thread(file.read)
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def load_msword(self, file_path: str) -> str:
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return self.docling_service.parse_to_markdown(file_path)
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def load_powerpoint(self, file_path: str) -> str:
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return self.docling_service.parse_to_markdown(file_path)
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@classmethod
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def get_page_images_from_pdf(cls, file_path: str, temp_dir: str) -> List[str]:
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with pdfplumber.open(file_path) as pdf:
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images = []
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for page in pdf.pages:
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img = page.to_image(resolution=150)
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image_path = os.path.join(temp_dir, f"page_{page.page_number}.png")
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img.save(image_path)
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images.append(image_path)
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return images
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@classmethod
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async def get_page_images_from_pdf_async(cls, file_path: str, temp_dir: str):
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return await asyncio.to_thread(
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cls.get_page_images_from_pdf, file_path, temp_dir
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)
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