phpcms 实现动态价格

什么是动态价格（自命名）？——  一般来说商品有个固定的价格，随着节假日或者促销活动可能会发生价格变化，结束后又恢复原价，如果每次价格变化都需要修改价格，那么不仅在时间上不好把握，也需要消耗更多的人力。 为了适应这种情况，我们可以给价格在预期的时间段赋予一个新的价格，那么，动态价格就是——给未来的时间段设置一个新的价格，当这个时间到来的时候自动采用新的价格。

要点：

1.优先级:特定时间 > 节假日(不带年份) > 常规价格

2.如何读取数据

3.如何转为图表

效果图：

动态价格添加及列表

核心代码：

 /**
      * 获取动态价格节点数据
      * @param type $pid
      * @param type $qbdate
      * @param type $qedate
      * @return type
      */
     public function get_data($pid,$qbdate="",$qedate="")
     {
         //查询时间容错
         if($qbdate>$qedate){
             $tmpdate=$qbdate;
             $qbdate=$qedate;
             $qedate=$tmpdate;
         }
         $today=mktime(0,0,0,date('m'),date('d'),date('Y'));
         //is_date 是app functions global.funs.php中的自定义函数
         if(empty($qbdate) || !is_date($qbdate))     $qbdate=strtotime("-60 days",$today);    //默认查询开始年份
         if(empty($qedate) || !is_date($qedate))    $qedate=strtotime("+60 days",$today);    

         //获取景点信息
         $this->table_name =$this->db_tablepre.'travel_scenic';
         $pid = intval($pid);
         if(!$pid) return false;
         $r = $this->get_one(array('id'=>$pid));
         $data['pid']=$r['id'];
         $data['title']=$r['title'];
         $data['price']=$r['price'];
         $data['cost']=$r['cost'];
         $data['qbdate']=$qbdate;
         $data['qedate']=$qedate;

         $days=ceil(abs($qbdate-$qedate)/86400);    //查询开始日期与结束日期的天数

         //给时间段内的数组赋初值（基本价格）
         for($i=0;$i<=$days;$i++){
             $the_day=strtotime("+".$i." days",$qbdate);
             $y=intval(date('Y',$the_day));
             $m=intval(date('m',$the_day));
             $d=intval(date('d',$the_day));
             $price_data[$y.'_'.$m.'_'.$d]=$data['price'];
             $cost_data[$y.'_'.$m.'_'.$d]=$data['cost'];
             $desc_data[$y.'_'.$m.'_'.$d]="";
         }

         //SQL查询准备
         $qbyear=date('Y',$qbdate);
         $qbmonth=date('m',$qbdate);
         $qbday=date('d',$qbdate);

         $qeyear=date('Y',$qedate);
         $qemonth=date('m',$qedate);
         $qeday=date('d',$qedate);

         $this->table_name = 'travel_scenic_dynprice';
         //此处用循环来解决跨年度查询的问题，每次查询一年的，然后合并；
         for($qyear=$qbyear;$qyear<=$qeyear;$qyear++){

             $this->query("select  *,
 DATE_FORMAT(concat(CASE byear WHEN 0 THEN '".$qyear."' ELSE byear END ,'-',bmonth,'-',bday),'%Y-%m-%d') as bdate,
 DATE_FORMAT(concat(CASE eyear WHEN 0 THEN '".$qyear."' ELSE eyear END ,'-',emonth,'-',eday),'%Y-%m-%d') as edate
 from phpcms_travel_scenic_dynprice
 where pid=".$pid." and priority=1 and status=1
 and DATE_FORMAT(concat(CASE byear WHEN 0 THEN '".$qyear."' ELSE byear END ,'-',bmonth,'-',bday),'%Y-%m-%d') >='".$qbyear."-".$qbmonth."-".$qbday."'
 and DATE_FORMAT(concat(CASE eyear WHEN 0 THEN '".$qyear."' ELSE eyear END ,'-',emonth,'-',eday),'%Y-%m-%d')<='".$qeyear."-".$qemonth."-".$qeday."'
 order by id asc");

             $r2=$this->fetch_array();

             foreach ($r2 as $key => $value) {
                 $tmp_bdate=strtotime($r2[$key]['bdate']);
                 $tmp_edate=strtotime($r2[$key]['edate']);
                 $days=ceil(abs($tmp_bdate-$tmp_edate)/86400);
                 //echo $days;
                 for($i=0;$i<=$days;$i++){
                     $the_day=strtotime("+".$i." days",$tmp_bdate);
                     $y=intval(date('Y',$the_day));
                     $m=intval(date('m',$the_day));
                     $d=intval(date('d',$the_day));
                     $price_data[$y.'_'.$m.'_'.$d]=$r2[$key]['dynprice'];
                     $cost_data[$y.'_'.$m.'_'.$d]=$r2[$key]['dyncost'];
                     $desc_data[$y.'_'.$m.'_'.$d]=$r2[$key]['description'];
                 }

             }
             //合并每年的数组
             $price_data+=$price_data;
             $cost_data+=$cost_data;
         }

         //print_r($price_data);
         //此处针对特定时间的价格进行处理。
         $this->query("select  *,
 DATE_FORMAT(concat(byear ,'-',bmonth,'-',bday),'%Y-%m-%d') as bdate,
 DATE_FORMAT(concat(eyear,'-',emonth,'-',eday),'%Y-%m-%d') as edate
 from phpcms_travel_scenic_dynprice
 where pid=".$pid." and priority=2 and status=1
 and DATE_FORMAT(concat(byear,'-',bmonth,'-',bday),'%Y-%m-%d') >='".$qbyear."-".$qbmonth."-".$qbday."'
 and DATE_FORMAT(concat(eyear,'-',emonth,'-',eday),'%Y-%m-%d')<='".$qeyear."-".$qemonth."-".$qeday."'
 order by id asc");
         $r3=$this->fetch_array();

         foreach ($r3 as $key => $value) {
             $tmp_bdate=strtotime($r3[$key]['bdate']);
             $tmp_edate=strtotime($r3[$key]['edate']);
             $days=ceil(abs($tmp_bdate-$tmp_edate)/86400);
             for($i=0;$i<=$days;$i++){
                 $the_day=strtotime("+".$i." days",$tmp_bdate);
                 //echo date("Y-m-d",$the_day)." ";
                 $y=intval(date('Y',$the_day));
                 $m=intval(date('m',$the_day));
                 $d=intval(date('d',$the_day));
                 $price_data[$y.'_'.$m.'_'.$d]=$r3[$key]['dynprice'];
                 $cost_data[$y.'_'.$m.'_'.$d]=$r3[$key]['dyncost'];
                 $desc_data[$y.'_'.$m.'_'.$d]=$r3[$key]['description'];
             }

         }

         //去除price_data和cost_data连续都相同的节点
         $i=1;
         $count=count($price_data);
         foreach ($price_data as $key => $value) {
             if($i==1){
                 $first_node=$price_data[$key];
                 $first_node2=$cost_data[$key];
             }
             if($i!=1 && $i!=$count){
                 if($price_data[$key]==$first_node && $cost_data[$key]==$first_node2 ){
                     unset($price_data[$key]);
                     unset($cost_data[$key]);
                     unset($desc_data[$key]);
                 }else{
                     $first_node=$price_data[$key];
                     $first_node2=$cost_data[$key];
                 }
             }
             $i++;
         }

         $data['price_data']=$price_data;
         $data['cost_data']=$cost_data;
         $data['desc_data']=$desc_data;
         //print_r($data);
         return $data;

     }

     /**
      * 根据数据生成chart所需的data数据
      * @param type $data
      * @return type
      */
     public function get_chartdata($data)
     {
         $price_data=$data['price_data'];
         $cost_data=$data['cost_data'];
         $desc_data=$data['desc_data'];
         $chartdata="[";
             foreach ($price_data as $key => $value) {
                 $keys=explode("_",$key);
                 $chartdata.="[new Date(".$keys[0].", ".($keys[1]-1).", ".$keys[2]."), ".$price_data[$key].",'".$desc_data[$key]."'],";
             }
         $chartdata=rtrim($chartdata,',').']';

         $chartdata2="[";
             foreach ($cost_data as $key => $value) {
                 $keys=explode("_",$key);
                 $chartdata2.="[new Date(".$keys[0].", ".($keys[1]-1).", ".$keys[2]."), ".$cost_data[$key].",'".$desc_data[$key]."'],";
             }
         $chartdata2=rtrim($chartdata2,',').']';
         return array('pid'=>$data['pid'],
             'title'=>$data['title'],
             'qbdate'=>$data['qbdate'],
             'qedate'=>$data['qedate'],
             'chartprice'=>$chartdata,
             'chartcost'=>$chartdata2);
     }