<?php
/**
 * SoClass.php
 * 索引與搜索類 */
 
class SoClass {
 
  private $_xindex;
 
  private $_xsearch;
 
  private $_project;
 
  public function __construct($project){
 
    //載入引導(dǎo)文件
    require_once 'lib/XS.php';
    //初始化
    $xs = new XS($project); 
    $this->_project = $project;
    $this->_xindex = $xs->index; 
    $this->_xsearch = $xs->search;
    $this->_xsearch->setCharset('UTF-8');
  }
 
  public function query($keyWord,$row=20,$jnum=0){
 
    $xs = new XS($this->_project);
    $xs->search->setFuzzy();
    $xs->search->setAutoSynonyms();
    $xs->search->setQuery($keyWord); //支持同義詞搜索，默認(rèn)打開
    $xs->search->setLimit($row, $jnum); //設(shè)置返回結(jié)果最多為 5 條，并跳過前 10 條
    $docs = $xs->search->search(); //執(zhí)行搜索，將搜索結(jié)果文檔保存在 $docs 數(shù)組中    
    $count = $xs->search->count(); //獲取搜索結(jié)果的匹配總數(shù)估算值
    if($count){
      $data = array();
      foreach ($docs as $key=>$doc){
        $data[$key]['pid'] = $doc->pid;
        $data[$key]['nid'] = $doc->nid;
        $data[$key]['category'] = $doc->category;
        $data[$key]['url'] = $doc->url;
        $data[$key]['name'] = $xs->search->highlight(htmlspecialchars($doc->name));
        $data[$key]['message'] = $xs->search->highlight(htmlspecialchars($doc->message));
      }
 
      return array('data'=>$data,'count'=>$count);
    }
    return array();
  }
 
  public function hotWord($num,$type='lastnum'){
 
    return $this->_xsearch->getHotQuery($num,$type);
  }
 
  public function expanded($keyWord){
 
    return $this->_xsearch->getExpandedQuery($keyWord);
  }
 
  public function lastCount(){
 
    return $this->_xsearch->getLastCount();
  }
 
  public function index($data,$update=0){
 
    // 創(chuàng)建文檔對象
    $doc = new XSDocument;
    $doc->setFields($data);
 
    // 添加或更新到索引數(shù)據(jù)庫中
    if(!$update){
      $this->_xindex->add($doc);
    }else{
      $this->_xindex->update($doc);
    }
  }
 
  public function delete($idArray){
 
    //刪除索引(主鍵刪除array('1','2','3'))
    $this->_xindex->del($idArray); 
  }
 
  public function addSynonym($word1,$word2){
 
    $this->_xindex->addSynonym($word1,$word2);
  }
 
  public function clearIndex(){
 
    $this->_xindex->clean();
  }
 
}
 
?>