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压缩路线规划中的经纬度点集

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<?php
/**
 * @author      : hanhh
 * @create Date : 2013/1/6
 * @name        : 经纬度点集压缩
 * @Version     : 1.0
 * tags
 */
class lonlatPress {
    private $logs = array();//日志
    /*压缩点的转换*/
    private $lons = array();//简化的经度列表
    private $lats = array();//简化的纬度列表
    private $pressLonlatArr=array();//压缩后的经纬度点 
    /*字符串切割 变量*/
    private $json_start = &#39;&#39;;//api字符的开始 
    private $json_end = &#39;&#39;;//api字符的结束 
    private $json_points = &#39;&#39;;//api字符的点集  
    private $json_press_points = &#39;&#39;;//压缩字符的点集  
    private $base = 360000000;//转换基数360万
 
    private $log_in_count = 0;//输入的点的个数
    private $log_out_count = 0;//输出的点的个数
 
    public  function __construct(){  }
     
    /*接口返回数据的压缩方法*/
    function api2press($str){   
        $ret = $str;
        if($this->api_cut($str) && $this->pressLonLat($this->json_points)){
            $ret = $this->press_points();
        }       
        //log
        $logmsg[&#39;in_count&#39;] = $this->log_in_count;
        $logmsg[&#39;out_count&#39;] = $this->log_out_count;
        $logmsg[&#39;in_json&#39;] = count($this->json_points)>0?$this->json_points:$str;
        $logmsg[&#39;out_json&#39;] = count($this->json_press_points)>0?$this->json_press_points:$ret;
        //zdebug($logmsg);
        $this->__log($logmsg);
        return $ret;
    }
 
    /*压缩后的经纬度点集--array*/
    function lonlats(){
        return array($this->lons,$this->lats,$this->pressLonlatArr);
        return $this->pressLonlatArr;
    }   
    /*压缩后的经纬度点集--json*/
    function press_points(){
        $press = array();
        $press[&#39;lons&#39;] = $this->lons;
        $press[&#39;lats&#39;] = $this->lats;
        $press[&#39;pres&#39;] = $this->pressLonlatArr;
        $this->log_out_count = count($this->pressLonlatArr);
        $this->json_press_points = json_encode($press);
        $ret = $this->json_start.$this->json_press_points.$this->json_end;
        //$ret = $this->json_start.&#39;[&#39;.$this->json_press_points.&#39;]&#39;.$this->json_end;
        return $ret;
    }
    /*接口返回数据的切割方法*/
    function api_cut($txt){ 
        $t[&#39;in&#39;] = $txt;
        $t[] = $start_mark = &#39;"lines":{"unit":2,"lines":[{"points":[&#39;;
        $t[] = $end_mark = &#39;]}],"previewl":&#39;;
        $t[] = $mark_count = strlen($start_mark);
        $t[] = $start_i_pos = strpos($txt,$start_mark);//
        if ($start_i_pos === false) {   return false;       }
        $t[] = $start_i = $start_i_pos+$mark_count-1;//自身长度 + 标志串长度-最前面的"["
 
        $t[] = $end_i_pos = strpos($txt,$end_mark);
        if ($end_i_pos === false) { return false;       }
        $t[] = $end_i = $end_i_pos;
        $t[&#39;s&#39;] = $this->json_start = substr($txt,0,$start_i);
        $t[&#39;e&#39;] = $this->json_end = substr($txt,$end_i+1);//最后的"]"保留
        $t[&#39;p&#39;] = $this->json_points = substr($txt,$start_i,$end_i-$start_i+1);//最后的"]"保留
        //zdebug($t);
        return strlen($this->json_points);
    }
 
    /* 经纬度点压缩算法 */
    function pressLonLat($lonlats){
        $t[] = __FUNCTION__.&#39;-----------------------&#39;;
        $arrpoints = json_decode($lonlats,true);
        $this->log_in_count = count($arrpoints);
        if(is_array($arrpoints)){
            foreach($arrpoints as $val){
                if(is_numeric($val[&#39;lon&#39;]) && is_numeric($val[&#39;lat&#39;]) ) // 这个校验经纬度的正确性
                $t[] = $this->pressLonlatArr[] = $this->splitLonLat_hex_ignoreZero($val[&#39;lon&#39;].&#39;,&#39;.$val[&#39;lat&#39;]);
                //$t[] = $this->pressLonlatArr[] = $this->splitLonLat_value_36g($val[&#39;lon&#39;].&#39;,&#39;.$val[&#39;lat&#39;]);
            }
        }
        $t[] = __FUNCTION__.&#39;--------------------end&#39;;
        return count($this->pressLonlatArr);
    }
    /* 
    * 经纬度点压缩算法,
    * 经纬度对照表中的【值】是经纬度的整数部分【array(&#39;0&#39;=>116)】
    * 经纬度的整数部分是零时忽略掉
    * 输入:
    * 输出:
    */
    function splitLonLat_value_36g($str,$char=&#39;,&#39;){
        $t[] = __FUNCTION__.&#39;-----------------------&#39;;
        $t[] =$sparr = explode($char,$str);
        $t[] =$sparr[0] = $sparr[0] * $this->base;
        $t[] =$sparr[1] = $sparr[1] * $this->base;
         
        $t[] = __FUNCTION__.&#39;--------------------end&#39;;
        //zdebug($t);
        return $sparr[0].&#39;,&#39;.$sparr[1];
    }/* 
    * 经纬度点压缩算法,
    * 经纬度对照表中的【值】是经纬度的整数部分【array(&#39;0&#39;=>116)】
    * 经纬度的整数部分是零时忽略掉
    * 输入:
    * 输出:
    */
    function splitLonLat_hex_ignoreZero($str,$char=&#39;,&#39;){
        $t[] = __FUNCTION__.&#39;-----------------------&#39;;
        $t[] =$sparr = explode($char,$str);
        $t[] =$arrlon = $this->splitDotStr($sparr[0]);
        $t[] =$arrlat = $this->splitDotStr($sparr[1]);
        $hex_lon = $this->dec2x($arrlon[0]);
        if(!in_array($hex_lon,$this->lons)){
            $lonindex = count($this->lons);
            $this->lons[] = $hex_lon;
        }else{
            $lonindex = array_search($hex_lon,$this->lons);
        }
        $hex_lat = $this->dec2x($arrlat[0]);
        if(!in_array($hex_lat,$this->lats)){
            $latindex = count($this->lats);
            $this->lats[] = $hex_lat;
        }else{
            $latindex = array_search($hex_lat,$this->lats);
        }       
        $t[] =$lon_index_hex = $this->dec2x($lonindex,36);
        $t[] =$lat_index_hex = $this->dec2x($latindex,36);
 
        $t[] =$lonindex_str = (empty($lon_index_hex)?&#39;&#39;:$lon_index_hex.&#39;.&#39;);
        $t[] =$latindex_str = (empty($lat_index_hex)?&#39;&#39;:$lat_index_hex.&#39;.&#39;);
        $t[] =$lon_hex = $this->dec2x($arrlon[1],36);
        $t[] =$lat_hex = $this->dec2x($arrlat[1],36);
        $t[] = __FUNCTION__.&#39;--------------------end&#39;;
        //zdebug($t);
        return $lonindex_str.$lon_hex.&#39;,&#39;.$latindex_str.$lat_hex;
//      return $lonindex_str.$arrlon[1].&#39;,&#39;.$latindex_str.$arrlat[1];
    }
    /* 
    * 经纬度点压缩算法,
    * 经纬度对照表中的【值】是经纬度的整数部分【array(&#39;0&#39;=>116)】
    * 经纬度的整数部分是零时忽略掉
    * 输入:
    * 输出:
    */
    function splitLonLat_dec_ignoreZero($str,$char=&#39;,&#39;){
        $t[] = __FUNCTION__.&#39;-----------------------&#39;;
        $t[] =$sparr = explode($char,$str);
        $t[] =$arrlon = $this->splitDotStr($sparr[0]);
        $t[] =$arrlat = $this->splitDotStr($sparr[1]);
        if(!in_array($arrlon[0],$this->lons)){
            $lonindex = count($this->lons);
            $this->lons[] = $arrlon[0];
        }else{
            $lonindex = array_search($arrlon[0],$this->lons);
        }       
        if(!in_array($arrlat[0],$this->lats)){
            $latindex = count($this->lats);
            $this->lats[] = $arrlat[0];
        }else{
            $latindex = array_search($arrlat[0],$this->lats);
        }       
        $t[] =$lon_index_hex = $this->dec2x($lonindex,36);
        $t[] =$lat_index_hex = $this->dec2x($latindex,36);
 
        $t[] =$lonindex_str = (empty($lon_index_hex)?&#39;&#39;:$lon_index_hex.&#39;.&#39;);
        $t[] =$latindex_str = (empty($lat_index_hex)?&#39;&#39;:$lat_index_hex.&#39;.&#39;);
        $t[] =$lon_hex = $this->dec2x($arrlon[1],36);
        $t[] =$lat_hex = $this->dec2x($arrlat[1],36);
        $t[] = __FUNCTION__.&#39;--------------------end&#39;;
        //zdebug($t);
        return $lonindex_str.$lon_hex.&#39;,&#39;.$latindex_str.$lat_hex;
//      return $lonindex_str.$arrlon[1].&#39;,&#39;.$latindex_str.$arrlat[1];
    }
 
    /* 经纬度点压缩算法,经纬度对照表中的【值】是经纬度的整数部分【array(&#39;0&#39;=>116)】
    * 输入:
    * 输出:
    */
    function splitLonLat_value($str,$char=&#39;,&#39;){
        $t[] = __FUNCTION__.&#39;-----------------------&#39;;
        $t[] =$sparr = explode($char,$str);
        $t[] =$arrlon = $this->splitDotStr($sparr[0]);
        $t[] =$arrlat = $this->splitDotStr($sparr[1]);
        if(!in_array($arrlon[0],$this->lons)){
            $lonindex = count($this->lons);
            $this->lons[] = $arrlon[0];
        }else{
            $lonindex = array_search($arrlon[0],$this->lons);
        }       
        if(!in_array($arrlat[0],$this->lats)){
            $latindex = count($this->lats);
            $this->lats[] = $arrlat[0];
        }else{
            $latindex = array_search($arrlat[0],$this->lats);;
        }
        $t[] = __FUNCTION__.&#39;--------------------end&#39;;
        //zdebug($t);
        return $lonindex.&#39;.&#39;.$arrlon[1].&#39;,&#39;.$latindex.&#39;.&#39;.$arrlat[1];
    }
 
    /* 经纬度点压缩算法 ,经纬度对照表中的【键】是经纬度的整数部分【array(&#39;116&#39;=>0)】
    * 输入:
    * 输出:
    */
    function splitLonLat_key($str,$char=&#39;,&#39;){
        $t[] = __FUNCTION__.&#39;-----------------------&#39;;
        $t[] =$lon=$this->lons;
        $t[] =$lat=$this->lats;
        $t[] =$sparr = explode($char,$str);
        $t[] =$arrlon = $this->splitDotStr($sparr[0]);
        $t[] =$arrlat = $this->splitDotStr($sparr[1]);
        if(!array_key_exists($arrlon[0],$this->lons)){
            $lonindex = count($this->lons);
            $this->lons[$arrlon[0]] = $lonindex;
        }else{
            $lonindex = $this->lons[$arrlon[0]];
        }       
        if(!array_key_exists($arrlat[0],$this->lats)){
            $latindex = count($this->lats);
            $this->lats[$arrlat[0]] = $latindex;
        }else{
            $latindex = $this->lats[$arrlat[0]];
        }
//      //忽略 0 
//      $lonindex_str = (empty($lonindex)?&#39;&#39;:$lonindex.&#39;.&#39;);
//      $latindex_str = (empty($latindex)?&#39;&#39;:$latindex.&#39;.&#39;);
        $t[] = __FUNCTION__.&#39;--------------------end&#39;;
        //zdebug($t);
        return $lonindex.&#39;.&#39;.$arrlon[1].&#39;,&#39;.$latindex.&#39;.&#39;.$arrlat[1];
//      return $lonindex_str.$arrlon[1].&#39;,&#39;.$latindex_str.$arrlat[1];
    }
    /*分解一个由dot分开的字符串*/
    function splitDotStr($str,$char=&#39;.&#39;){
        return explode($char,$str);
    }   
/**
 *十进制转36进制 不足位数前面补零*
 *
 * @param $num 传入数据
 * @param int $bin 转换的进制可以是:2,8,16,36
 * @return 返回没有36进制的数据格式
 */
function dec2x($str){
    return base_convert($str,10,36);
}   
/**
 *十进制转36进制 不足位数前面补零*
 *
 * @param $num 传入数据
 * @param int $bin 转换的进制可以是:2,8,16,36
 * @return 返回没有36进制的数据格式
 */
function dec2x_36_end($num,$bin=36)
{
    static $arr=array(0,1,2,3,4,5,6,7,8,9,&#39;A&#39;,&#39;B&#39;,&#39;C&#39;,&#39;D&#39;,&#39;E&#39;,&#39;F&#39;,&#39;G&#39;,&#39;H&#39;,&#39;I&#39;,&#39;J&#39;,&#39;K&#39;,&#39;L&#39;,&#39;M&#39;,&#39;N&#39;,&#39;O&#39;,&#39;P&#39;,&#39;Q&#39;,&#39;R&#39;,&#39;S&#39;,&#39;T&#39;,&#39;U&#39;,&#39;V&#39;,&#39;W&#39;,&#39;X&#39;,&#39;Y&#39;,&#39;Z&#39;);
    $bytelen=ceil(16/$bin); //获得如果是$bin进制,一个字节的长度
    $aOutChar=&#39;&#39;;
    $t="";
    $num=intval($num);
    while($num>0){
        $t=$arr[$num%$bin].$t;
        $num=floor($num/$bin);
    }
    $tlen=strlen($t);
    if($tlen%$bytelen!=0){
        $pad_len=$bytelen-$tlen%$bytelen;
        $t=str_pad("",$pad_len,"0",STR_PAD_LEFT).$t; //不足一个字节长度,自动前面补充0
    }
    $aOutChar=$t;
    return $aOutChar;
} 
 
    /*lines的数据格式*/
    function hanz(){
        return &#39;{"unit":2,"lines":[{"points":[{"lon":"116.4584889","lat":"39.9245522"},{"lon":"116.4595183","lat":"39.9245439"},{"lon":"116.4595247","lat":"39.9248439"},{"lon":"116.4613472","lat":"39.9248308"},{"lon":"116.4613319","lat":"39.9235872"},{"lon":"116.4618747","lat":"39.9235803"},{"lon":"116.4619008","lat":"39.9256725"},{"lon":"116.4617444","lat":"39.9264189"},{"lon":"116.4618406","lat":"39.9379361"},{"lon":"116.4618486","lat":"39.9513561"},{"lon":"116.4617794","lat":"39.9518767"},{"lon":"116.4613456","lat":"39.9528475"},{"lon":"116.4608875","lat":"39.9534075"},{"lon":"116.4600017","lat":"39.9541775"},{"lon":"116.4500842","lat":"39.9607961"},{"lon":"116.4430425","lat":"39.9654405"},{"lon":"116.4381708","lat":"39.9685919"},{"lon":"116.4374217","lat":"39.9690211"},{"lon":"116.4370264","lat":"39.9691944"},{"lon":"116.4359053","lat":"39.9695250"},{"lon":"116.4351839","lat":"39.9696439"},{"lon":"116.4342147","lat":"39.9696764"},{"lon":"116.3989278","lat":"39.9687430"},{"lon":"116.3984086","lat":"39.9688730"},{"lon":"116.3975256","lat":"39.9688364"}]}],"previewl":15}&#39;;
    }
 
    function test_data(){
        return 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    }
    function test_not_point(){
        return &#39;{"location_lat":"39.9513561","isnavigate":1,"meetid":"1","start_lon":"116.4595183","location_lon":"116.4618586","messages":"","isenabled":1,"timeremaining":0,"end_lon":"116.4600017","success":"success","start_lat":"39.9245439","end_lat":"39.9534075"}&#39;;
    }
 
    /*lines的数据格式    */
    function test_data_add($len=10){
        $start = 1;
        $end = ($len<1)?1:$len;
        $flon = 110;
        $flat = 22;
        $arrs = array();
        for($i=$start;$i<=$end;$i++){
            if($i%400==0){
                $flon++;
                $flat++;
            }
            $tmp = str_pad($i, 4, "0", STR_PAD_LEFT);
            $arrs[] = &#39;{"n":"&#39;.$flon.&#39;.458&#39;.$tmp.&#39;","t":"&#39;.$flat.&#39;.924&#39;.$tmp.&#39;"}&#39;;
            $arrs_cur[] = &#39;{"lon":"&#39;.$flon.&#39;.458&#39;.$tmp.&#39;","lat":"&#39;.$flat.&#39;.924&#39;.$tmp.&#39;"}&#39;;
        }
        return &#39;{"unit":2,"lines":[{"points":[&#39;.implode(&#39;,&#39;,$arrs_cur).&#39;]}],"previewl":15}&#39;;
    }
    function test_getLocation($len){
        return &#39;{"location_lat":"39.9513561","isnavigate":1,"meetid":"1","start_lon":"116.4595183","location_lon":"116.4618586","messages":"","isenabled":1,"timeremaining":0,"lines":&#39;.$this->test_data_add($len).&#39;,"end_lon":"116.4600017","success":"success","start_lat":"39.9245439","end_lat":"39.9534075"}&#39;;
    }
    function test_slipt_str($len){      
        $t[] =$txt = $this->test_getLocation($len);
        $t[] = $start_mark = &#39;"lines":{"unit":2,"lines":[{"points":[&#39;;
        $t[] = $end_mark = &#39;]}],"previewl":&#39;;
        $t[] = $mark_count = strlen($start_mark);
        $t[] = $start_i = strpos($txt,$start_mark)+$mark_count-1;//自身长度 + 标志串长度-最前面的"["
        $t[] = $end_i = strpos($txt,$end_mark)-$start_i+1;//最后的"]"保留
        $t[] = $jsonpoints = substr($txt,$start_i,$end_i);
        return $jsonpoints;
    }
    function test_(){   }
 
    /**
     * 记录日志.
     * 
     * @param $logmsg unknown_type          
     * @param $type unknown_type        
     */
    protected function __log($logmsg, $type = &#39;debug&#39;) {        
        $logmsg [] = __FILE__;      
        zdebug($logmsg,"press",&#39;weblog/press/&#39;.date(&#39;Ymd_H&#39;).&#39;.press.txt&#39;);     
    }
}

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