""" PDF generation utility for creating professional prescription PDFs """ from xhtml2pdf import pisa from flask import render_template from datetime import datetime import os def generate_prescription_pdf(prescription): """ Generate a professional PDF from prescription data using xhtml2pdf Args: prescription: Prescription model instance Returns: str: Absolute path to the generated PDF file """ # Prepare PDF directory from flask import current_app pdf_dir = os.path.join(current_app.root_path, 'static', 'prescriptions') if not os.path.exists(pdf_dir): os.makedirs(pdf_dir) # Generate PDF filename timestamp = datetime.now().strftime('%Y%m%d_%H%M%S') pdf_filename = f'prescription_{prescription.id}_{timestamp}.pdf' pdf_path = os.path.join(pdf_dir, pdf_filename) # Render HTML template (CSS is now embedded in the template's ) html_content = render_template('prescriptions/pdf_template.html', prescription=prescription) # Generate PDF using xhtml2pdf with open(pdf_path, "w+b") as result_file: pisa_status = pisa.CreatePDF( html_content, dest=result_file ) if pisa_status.err: print(f"PDF validation errors: {pisa_status.err}") # Not explicitly raising to avoid crashing if minor parsing errors occur, # but in a stricter environment, we could log or raise an exception. # Update prescription record with PDF path prescription.pdf_path = os.path.join('static', 'prescriptions', pdf_filename) from app.database import db db.session.commit() return pdf_path