<?php
define('PI', 3.1415926535898);
define('EARTH_RADIUS', 6378.137);
//树形结构转一维数组
function setlist($arr, $parentid = 0)
{
    $array = array();
    foreach ($arr as $val) {
        $indata = array("id" => $val["id"], "parent_id" => $parentid);
        $array[] = $indata;
        if (isset($val["children"])) {
            $children = setlist($val["children"], $val["id"]);
            if ($children) {
                $array = array_merge($array, $children);
            }
        }
    }
    return $array;
}

//初始化树形结构
function infiniteTree($data, $pid = 0)
{
    if (!is_array($data) || empty($data)) return false;
    $tree = array();
    foreach ($data as $k => $v) {
        // 找出所有的儿子
        if ($v['parent_id'] == $pid) {
            // 将儿子数据赋值给sub键，递归看看儿子还有没有孙子
            $v['children'] = infiniteTree($data, $v['id']);
            $tree[] = $v;
            // 删除遍历过的数组数据
            unset($data[$k]);
        }
    }
    return $tree;
}

//对象转数组
function object_array($array)
{
    if (is_object($array)) {
        $array = (array)$array;
    }
    if (is_array($array)) {
        foreach ($array as $key => $value) {
            $array[$key] = object_array($value);
        }
    }
    return $array;
}


//求地图中心点
function GetCenterFromDegrees($data)
{

    if (!is_array($data)) return FALSE;

    $num_coords = count($data);

    $X = 0.0;
    $Y = 0.0;
    $Z = 0.0;

    foreach ($data as $coord) {

        $lat = deg2rad((float)$coord['lat']);
        $lon = deg2rad((float)$coord['lng']);

        $a = cos($lat) * cos($lon);
        $b = cos($lat) * sin($lon);
        $c = sin($lat);

        $X += $a;
        $Y += $b;
        $Z += $c;
    }

    $X /= $num_coords;
    $Y /= $num_coords;
    $Z /= $num_coords;

    $lon = atan2($Y, $X);
    $hyp = sqrt($X * $X + $Y * $Y);
    $lat = atan2($Z, $hyp);

    return array('lat' => rad2deg($lat), 'lng' => rad2deg($lon));
}


//计算两点之间坐标距离 单位 米
function GetDistance($lat1, $lng1, $lat2, $lng2)
{
    $radLat1 = $lat1 * (PI / 180);
    $radLat2 = $lat2 * (PI / 180);
    $a = $radLat1 - $radLat2;
    $b = ($lng1 * (PI / 180)) - ($lng2 * (PI / 180));
    $s = 2 * asin(sqrt(pow(sin($a / 2), 2) + cos($radLat1) * cos($radLat2) * pow(sin($b / 2), 2)));
    $s = $s * EARTH_RADIUS;
    //$s = round($s * 10000) / 10000;
    return $s * 1000;
}


//获取一个多边形中心点 到此多边形个点的最大距离  单位 米
function maxDistance(array $centre, array $fence)
{
    $distanceArr = array();
    foreach ($fence as $v) {
        $distanceArr[] = GetDistance($centre['lat'], $centre['lng'], $v['lat'], $v['lng']);
    }


    return max($distanceArr);

}


// lat转latitude lng转longitude
function latToLatitude($str)
{
    if (is_array($str)) {
        $str = json_encode($str);
    }
    $pattern_lat = '/lat/';
    $replace_lat = 'latitude';
    $str_lat = preg_replace($pattern_lat, $replace_lat, $str);

    $pattern_lng = '/lng/';
    $replace_lng = 'longitude';
    $str = preg_replace($pattern_lng, $replace_lng, $str_lat);
    return $str;
}

// latitude转lat  longitude转lng
function latitudeTolat($str)
{
    if (is_array($str)) {
        $str = json_encode($str);
    }
    $pattern_lat = '/latitude/';
    $replace_lat = 'lat';
    $str_lat = preg_replace($pattern_lat, $replace_lat, $str);

    $pattern_lng = '/longitude/';
    $replace_lng = 'lng';
    $str = preg_replace($pattern_lng, $replace_lng, $str_lat);
    return $str;


}

//高德地图绘制取精确数据 （前端已处理）
function getAccurate(array $arr)
{
    $data = [];
    foreach ($arr as $v) {
        $bata = [];
        $bata['lat'] = $v['P'];
        $bata['lng'] = $v['O'];
        $data[] = $bata;
    }
    return $data;
}

// 渲染高德地图， 电子围栏数据转换函数
function toGaodeFenceData($str)
{
    $arr = json_decode($str);
    $res = [];
    foreach ($arr as $v) {
        $arr2 = [$v->longitude, $v->latitude];
        $res[] = $arr2;
    }
    $res = json_encode($res);
    return $res;
}

// 渲染高德， 中心点数据转换函数
function toGaodeCentreData($str)
{
    $arr = json_decode($str);
    $res = [$arr->longitude, $arr->latitude];
    $res = json_encode($res);
    return $res;
}


/**
 * 获取图片的Base64编码(不支持url)
 * @date 2017-02-20 19:41:22
 *
 * @param $img_file 传入本地图片地址
 *
 * @return string
 */
function imgToBase64($img_file)
{

    $img_base64 = '';
    if (file_exists($img_file)) {
        $app_img_file = $img_file; // 图片路径
        $img_info = getimagesize($app_img_file); // 取得图片的大小，类型等

        //echo '<pre>' . print_r($img_info, true) . '</pre><br>';
        $fp = fopen($app_img_file, "r"); // 图片是否可读权限

        if ($fp) {
            $filesize = filesize($app_img_file);
            $content = fread($fp, $filesize);
            $file_content = chunk_split(base64_encode($content)); // base64编码
            switch ($img_info[2]) {           //判读图片类型
                case 1:
                    $img_type = "gif";
                    break;
                case 2:
                    $img_type = "jpg";
                    break;
                case 3:
                    $img_type = "png";
                    break;
            }

            $img_base64 = 'data:image/' . $img_type . ';base64,' . $file_content;//合成图片的base64编码

        }
        fclose($fp);
    }

    return $img_base64; //返回图片的base64
}


//可以发送get和post的请求方式
function curl_request($url, $method = 'get', $data = null, $https = true)
{
    $headers = ["Content-type: application/json;charset='utf-8'", "Accept: application/json", "Cache-Control: no-cache", "Pragma: no-cache",];
    //1.初识化curl
    $ch = curl_init($url);
    //2.根据实际请求需求进行参数封装
    //返回数据不直接输出
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    //如果是https请求
    if ($https === true) {
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
    }
    //如果是post请求
    if ($method === 'post') {
        //开启发送post请求选项
        curl_setopt($ch, CURLOPT_POST, true);
        //发送post的数据
        curl_setopt($ch, CURLOPT_POSTFIELDS, $data);

        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    }
    //3.发送请求
    $result = curl_exec($ch);
    //4.返回返回值，关闭连接
    curl_close($ch);
    return $result;
}


function php2js($arr)
{
    return json_encode($arr, true);
}

function js2php($json)
{
    return json_decode($json, true);
}

function str2arr($str, $glue = ',')
{
    return explode($glue, $str);
}

function arr2str($arr, $glue = ',')
{
    return implode($glue, array_wrap($arr));
}

function objectToArray($object)
{
    //先编码成json字符串，再解码成数组
    return json_decode(json_encode($object), true);
}
 // 是否是序列化字符串
function is_serialized( $data ) {
    $data = trim( $data );
    if ( 'N;' == $data )
        return true;
    if ( !preg_match( '/^([adObis]):/', $data, $badions ) )
        return false;
    switch ( $badions[1] ) {
        case 'a' :
        case 'O' :
        case 's' :
            if ( preg_match( "/^{$badions[1]}:[0-9]+:.*[;}]\$/s", $data ) )
                return true;
            break;
        case 'b' :
        case 'i' :
        case 'd' :
            if ( preg_match( "/^{$badions[1]}:[0-9.E-]+;\$/", $data ) )
                return true;
            break;
    }
    return false;
}

function wechat_fee($money)
{
    return ($money * 100);
}