基本都是 getDiscussionsByXXX 这样的格式，用法差不多

//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;

// 获取热门文章
hive.api.getDiscussionsByHot(query, function(err, result) {
  console.log(err, result)
})

eg:
hive.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）
hive.api.getDiscussionsByTrending({tag: 'photography', limit: 1}, function(err, result) {
  console.log(err, result)
});

eg:
getTrending(){
  let query = { tag: "cn", limit : 20 }
  hive.api.getDiscussionsByTrending(query, function(err, data) {
    //取到最后一篇文章的author和Permlink，做为下一次查询的起始点
    author.value = data[data.length - 1].author
    permlink.value = data[data.length - 1].permlink
  })
}

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