hexo.extend.helper.register('isInHomePaging', function (pagePath, route) {
  if (pagePath.length > 5 && route === '/') {
    return pagePath.slice(0, 5) === 'page/';
  } else {
    return false;
  }
});

hexo.extend.helper.register('createNewArchivePosts', function (posts) {
  const postList = [], postYearList = [];
  posts.forEach(post => postYearList.push(post.date.year()));
  Array.from(new Set(postYearList)).forEach(year => {
    postList.push({
      year: year,
      postList: []
    })
  });
  postList.sort((a, b) => b.year - a.year)
  postList.forEach(item => {
    posts.forEach(post => item.year === post.date.year() && item.postList.push(post))
  });
  postList.forEach(item => item.postList.sort((a, b) => b.date.unix() - a.date.unix()));
  return postList;
});

hexo.extend.helper.register('getLevel', function (postCount) {
  return Math.ceil(postCount / 10);
});