pdf_parser

import re 
import PyPDF2
import spacy
class PdfParser():
    def __init__(self, file_path):
        self.file_path = file_path
    
    def pdf_reader(self) -> str:
        content = ''
        opener = open(self.file_path, 'rb')
        pdf = PyPDF2.PdfFileReader(opener)
        num_pages = pdf.numPages
        for i in range(0,num_pages):
            content+= pdf.getPage(i).extractText() + '\n'
        content = ' '.join(content.replace(u'\xa0', ' ').strip().split())
        page_number_removal = r"\d{1,3} of \d{1,3}"
        page_number_removal_pattern = re.compile(page_number_removal, re.IGNORECASE)
        content = re.sub(page_number_removal_pattern, '',content)
        
        return content
        

    def date_extractor(self) -> set:
        text = self.pdf_reader()
        date_label = ['DATE']
        nlp = spacy.load('en_core_web_lg')
        doc = nlp(text)
     

        dates_pattern = re.compile(r'(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})')
        dates = set((ent.text) for ent in doc.ents if ent.label_ in date_label)
        filtered_dates = set(date for date in dates if not dates_pattern.match(date))

        sorted_dates = sorted(list(filtered_dates),reverse=True)
        
        return sorted_dates