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<?php |
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namespace SimpleCMS\Region\Services; |
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use Illuminate\Support\Facades\DB; |
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use Illuminate\Database\Query\Builder; |
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use SimpleCMS\Framework\Services\SimpleService; |
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class DistanceService |
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{ |
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/** |
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* 获取距离RawString |
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* |
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* @author Dennis Lui <[email protected]> |
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* @param float $lat |
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* @param float $lng |
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* @param string $column |
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* @return string |
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*/ |
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private function distanceRaw(float $lat, float $lng, string $column = 'location'): string |
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{ |
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return "ST_Distance_Sphere($column,ST_GeomFromText('POINT($lng $lat)',4326))"; |
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} |
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/** |
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* 增加距离Select |
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* |
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* @author Dennis Lui <[email protected]> |
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* @param SimpleService $service |
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* @param float $lat |
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* @param float $lng |
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* @param string $column |
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* @return SimpleService |
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*/ |
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public function selectDistance(SimpleService $service, float $lat, float $lng, string $column = 'location', string $alias = 'distance'): SimpleService |
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{ |
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$distanceRaw = $this->distanceRaw($lat, $lng, $column); |
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$service->setSelect(DB::raw($distanceRaw . ' AS ' . $alias)); |
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return $service; |
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} |
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/** |
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* 按距离查询 |
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* |
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* @author Dennis Lui <[email protected]> |
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* @param SimpleService $service |
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* @param float $lat |
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* @param float $lng |
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* @param integer $maxDistance |
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* @param string $column |
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* @return SimpleService |
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*/ |
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public function queryDistance(SimpleService $service, float $lat, float $lng, float $maxDistance = 50, string $column = 'location'): SimpleService |
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{ |
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$this->selectDistance($service, $lat, $lng, $column); |
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$distanceRaw = $this->distanceRaw($lat, $lng, $column); |
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$service->setQuery(function (Builder $query) use ($distanceRaw, $maxDistance) { |
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$query->whereRaw("$distanceRaw <= $maxDistance"); |
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}); |
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return $service; |
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} |
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} |
hackout /
simplecms-region
