video/lib/http/reqularList.dart

import 'package:video/model/video.dart';

import 'request.dart';

class Regular {
  static getHttp(String url) async {
    var responseBody = await Request.getByHttpHtml(url);
    List<Video> recommends = getRecommend(responseBody);
    return recommends;
  }

  static List<Video> getRecommend(String responseBody) {
    RegExp reg = new RegExp(r'class="xing_vb">[\s\S]*?</div');
    Iterable<Match> matches = reg.allMatches(responseBody);
    List<Video> list = [];
    for (Match m in matches) {
      //groupCount返回正则表达式的分组数
      //由于group(0)保存了匹配信息，因此字符串的总长度为：分组数+1
      String match = m.group(0);
      //在此匹配
      list = getItems(match);
    }
    return list;
  }

  static List<Video> getItems(String match) {
    RegExp reg = new RegExp(
        r'class="xing_vb4">[\s\S]*?href="(.*?)"[\s\S]*?target="_blank">(.*?)</a[\s\S]*?class="xing_vb5">(.*?)</span[\s\S]*?class="xing_vb6">(.*?)</span[\s\S]*?/li>');
    Iterable<Match> matches = reg.allMatches(match);
    List<Video> list = [];
    for (Match m in matches) {
      //groupCount返回正则表达式的分组数
      //由于group(0)保存了匹配信息，因此字符串的总长度为：分组数+1
      String url = "";
      String title = "";

      String time = "";
      for (int i = 0; i < m.groupCount + 1; i++) {
        String match = m.group(i);
        switch (i) {
          case 1:
            url = match;
            break;
          case 2:
            title = match;
            break;
          case 3:
            break;
          case 4:
            time = match;
            break;
        }
      }
      Video video = new Video(url: url, title: title, time: time);
      list.add(video);
    }
    return list;
  }
}