getDiscussionsByXXX

//query的参数结构
string           tag;
uint32_t         limit = 0;
set<string>      filter_tags;
set<string>      select_authors;   
set<string>      select_tags;      
uint32_t         truncate_body = 0;
optional<string> start_author;
optional<string> start_permlink;
optional<string> parent_author;
optional<string> parent_permlink;

//Get Discussions By Hot 获取热门文章
steem.api.getDiscussionsByHot(query, function(err, result) {
  console.log(err, result)
})

eg:
steem.api.getDiscussionsByHot({tag: 'photography', limit: 1}, function(err, result) {
  console.log(err, result)
})


//获取某标签的趁势热贴（只有7天的）
steem.api.getDiscussionsByTrending({tag: 'photography', limit: 1}, function(err, result) {
  console.log(err, result)
});

eg:
getTrending(){
  let that = this
  let query = { tag: "cn", limit : 20 }
  this.steem.api.getDiscussionsByTrending(query, function(err, data) {
    that.posts = data
    //取到最后一篇文章的author和Permlink，做为下一次查询的起始点
    that.author = data[data.length - 1].author
    that.permlink = data[data.length - 1].permlink
  })
},
getNext(){
let that = this
let query = {tag: "cn", limit: 20, start_author: this.author, start_permlink: this.permlink}
this.steem.api.getDiscussionsByTrending(query, function(err, data) {
  data.forEach(post => {
    if (post.permlink != that.permlink) {
      that.posts.push(post)
    }
  })
  //取到最后一篇文章的author和Permlink，做为下一次查询的起始点
  that.author = data[data.length - 1].author
  that.permlink = data[data.length - 1].permlink
  if(data.length == 1){
    alert('没有更多了！')
  }
})
}


//获取新帖(所有日期的)
steem.api.getDiscussionsByCreated({tag: 'photography', limit: 1}, function(err, result) {
  console.log(err, result)
})