附近的站点

app/Http/Controllers/V1/Station/StationController.php

@@ -8,6 +8,7 @@
 
 namespace App\Http\Controllers\V1\Station;
 
+use App\Services\GeoHashServices;
 use Auth;
 use App\Http\Controllers\Controller;
 use App\Model\BillingTplModel;
@@ -159,7 +160,25 @@ class StationController extends Controller
         }
     }
 
+    /**
+     * 附近的站点
+     * @param Request $request
+     * @return mixed
+     */
+    public function nearby(Request $request)
+    {
+        $validator = Validator::make($request->all(), [
+            'longitude' => 'required',
+            'latitude' => 'required',
+        ]);
+        if ($validator->fails()) {
+            abort(400, $validator->errors()->first());
+        }
+        $geohash = new GeoHashServices();
+        $data = $geohash->getNearbyStation($request->get('latitude'), $request->get('longitude'));
 
+        return $this->response->array($this->getResponseCode() + ['data' => $data]);
+    }
 }
 
 

app/Services/GeoHashServices.php

+<?php
+
+namespace App\Services;
+use App\Model\StationModel;
+
+/**
+ * geohash lenght | km error
+ * 1              | ±2500
+ * 2              | ±630
+ * 3              | ±78
+ * 4              | ±20
+ * 5              | ±2.4
+ * 6              | ±0.61
+ * 7              | ±0.076
+ * 8              | ±0.019
+ * Class GeoHashServices
+ * @package App\Services
+ */
+class GeoHashServices
+{
+    private $coding = "0123456789bcdefghjkmnpqrstuvwxyz";
+
+    private $codingMap = [];
+
+    private $level = [
+        1 => 2500,
+        2 => 630,
+        3 => 78,
+        4 => 20,
+        5 => 2.4,
+        6 => 0.61,
+        7 => 0.076,
+        8 => 0.019,
+    ];
+
+    public function __construct()
+    {
+        for ($i = 0; $i < 32; $i++) {
+            $this->codingMap[bindec(str_pad(decbin($i), 5, "0", STR_PAD_LEFT))] = substr($this->coding, $i,1);
+        }
+    }
+
+    private function getLat($number, $small, $big,  $temp = 20){
+        $temp--;
+        $average = ($big + $small) / 2;
+        if ($temp == 0) {
+            if ($average <= $number) {
+                return '1';
+            } else {
+                return '0';
+            }
+        }
+        if ($average <= $number) {
+            return '1' . $this->getLat($number, $average, $big, $temp);
+        } else {
+            return '0' . $this->getLat($number, $small, $average, $temp);
+        }
+    }
+
+    private function joinStr($lat, $lon){
+        $str = '';
+        for ($i=0; $i < strlen($lat); $i++) {
+            $str .= $lon[$i] . $lat[$i];
+        }
+        return $str;
+    }
+
+    private function scaleToLevel($scale) {
+        foreach ($this->level as $key => $value) {
+            if ($scale > $value) {
+                return $key;
+            }
+        }
+        return 8;
+    }
+
+    /**
+     * 获取geohash编码
+     * @param $latitude
+     * @param $longitude
+     * @return string
+     */
+    public function getGeoHash($latitude, $longitude)
+    {
+        $latitude = $this->getLat($latitude, -90, 90);
+        $longitude = $this->getLat($longitude, -180, 180);
+        $string = $this->joinStr($latitude, $longitude);
+        $code = '';
+        for ($i = 0; $i < strlen($string) / 5 ; $i++) {
+            $code .= $this->codingMap[bindec(substr($string, $i * 5, 5))];
+        }
+        return $code;
+    }
+
+    /**
+     * 角度弧度计算公式
+     * 360度=2π π=pi()
+     * x度 = x*π/360 弧度
+     * @param $degree
+     * @return float
+     */
+    private function  getRadian($degree) {
+        return $degree * pi() / 180.0;
+    }
+
+    /**
+     * 根据经纬度计算两点之间的距离
+     * @param $lat1
+     * @param $long1
+     * @param $lat2
+     * @param $long2
+     * @return float|int 单位 米
+     */
+    public function getDistance($lat1, $long1, $lat2, $long2)
+    {
+        $radLat1 = $this->getRadian($lat1);
+        $radLat2 = $this->getRadian($lat2);
+        // 两点纬度差
+        $a = $radLat1 - $radLat2;
+        // 两点经度差
+        $b = $this->getRadian($long1) - $this->getRadian($long2);
+        $s = 2 * asin(sqrt(pow(sin($a / 2), 2) + cos($radLat1) * cos($radLat2) * pow(sin($b / 2), 2)));
+        return $s * 6378.137 * 1000;
+    }
+
+    /**
+     * 获取附近的站点
+     * @param $latitude
+     * @param $longitude
+     * @param int $scale
+     * @return $this|array|\Illuminate\Database\Query\Builder|\Illuminate\Support\Collection
+     */
+    public function getNearbyStation($latitude, $longitude, $scale = 5000)
+    {
+        // 搜索该点附近的站点
+        $geoHashCode = $this->getGeoHash($latitude, $longitude);
+        $stations = StationModel::select(['id', 'name', 'longitude', 'latitude', 'geohash'])
+            ->where('geohash', 'like', substr($geoHashCode, 0, 4) . '%')
+            ->get();
+        if (!$stations)
+            return [];
+        $stations = $stations ? $stations->toArray() : [];
+        foreach ($stations as $key => $station) {
+            $stations[$key]['distance'] = $this->getDistance($latitude, $longitude, $station['latitude'], $station['longitude']);
+        }
+        array_multisort($stations, SORT_ASC, SORT_NUMERIC, array_column($stations, 'distance'), SORT_ASC, SORT_NUMERIC);
+        return $stations;
+    }
+}
\ No newline at end of file

routes/web.php

@@ -112,7 +112,8 @@ $api->version('v1', ['namespace' => 'App\Http\Controllers\V1', 'prefix' => 'api/
         $api->get('user/code/withdraw',['uses' => 'User\WithDrawController@getCode']);
 
 
-
+        // 查找附近的站点
+        $api->post('station/nearby', 'Station\StationController@nearby');
     });
 
     $api->post('refresh/token', ['as' => 'wx.refresh.token', 'uses' => 'Wx\AccessController@refreshToken']);