extraction_service.py

import re
import json

class ExtractionService:
    def __init__(self, config_path):
        with open(config_path, "r") as f:
            self.fields_config = json.load(f)

    def extract_fields(self, text):
        extracted = {}
        for field, meta in self.fields_config.items():
            pattern = meta.get("pattern")
            match = re.search(pattern, text, re.IGNORECASE | re.MULTILINE)
            extracted[field] = match.group(1).strip() if match else None
        return extracted