from bs4 import BeautifulSoup
import urlparse
import re

class HtmlParser(object):
   
   
    def _get_new_urls(self, page_url, soup):
        new_urls = []
        links = soup.find_all("a",href=re.compile(r"/wiew/\d+\.htm"))
        for link in links:
            new_url = (link("href"))
            new_full_url = urlparse.urljoin(page_url,new_url)
            new_urls.add(new_full_url)
        return new_urls
           
   
   
    def _get_new_data(self, page_url, soup):
        res_data = {}
       
        #url
        res_data["url"] = page_url
        #<dd class="lemmaWgt-lemmaTitle-title"> <h1>Python</h1>

        title_node = soup.find("dd",class_="lemmaWgt-lemmaTitle-title").find("h1")
        res_data["title"] = title_node.get_text()
       
        #<div class="lemma-summary" label-module="lemmaSummary">
        summary_node = soup.find("div",class_="lemma-summary")
        res_data["summary"] = summary_node.get_text()
       
        return res_data
   
   
    def parse(self,page_url,html_cont):
        if page_url is None or html_cont is None:
            return
        soup = BeautifulSoup(html_cont,"html.parser",from_encoding="utf-8")
        new_urls = self._get_new_urls(page_url,soup)
        new_data = self._get_new_data(page_url,soup)
        return new_urls, new_data