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YG-Datasets/backend/app/services/file_processor/pdf_processor.py

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2026-03-17 14:36:31 +08:00
"""
PDF Text Extractor
"""
import pdfplumber
from typing import Dict, List, Optional
class PDFProcessor:
"""Extract text from PDF files"""
def extract_text(self, file_path: str) -> str:
"""Extract all text from PDF"""
text_parts = []
with pdfplumber.open(file_path) as pdf:
for page_num, page in enumerate(pdf.pages, 1):
text = page.extract_text()
if text:
text_parts.append(f"--- Page {page_num} ---\n{text}")
return "\n\n".join(text_parts)
def extract_pages(self, file_path: str) -> List[Dict]:
"""Extract text page by page with metadata"""
pages = []
with pdfplumber.open(file_path) as pdf:
for page_num, page in enumerate(pdf.pages, 1):
text = page.extract_text()
if text:
pages.append({
"page_number": page_num,
"text": text.strip(),
"word_count": len(text.split())
})
return pages
def extract_with_metadata(self, file_path: str) -> Dict:
"""Extract text with PDF metadata"""
result = {
"text": "",
"pages": [],
"metadata": {}
}
with pdfplumber.open(file_path) as pdf:
# Get metadata
result["metadata"] = {
"page_count": len(pdf.pages),
"metadata": pdf.metadata
}
# Extract pages
pages = self.extract_pages(file_path)
result["pages"] = pages
result["text"] = "\n\n".join([p["text"] for p in pages])
return result
def process_pdf(file_path: str) -> str:
"""Process PDF file and return text"""
processor = PDFProcessor()
return processor.extract_with_metadata(file_path)["text"]