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<?php |
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/* |
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* This file is part of the Runalyze DEM Reader. |
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* |
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* (c) RUNALYZE <[email protected]> |
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* |
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* This source file is subject to the MIT license that is bundled |
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* with this source code in the file LICENSE. |
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*/ |
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namespace Runalyze\DEM; |
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use Runalyze\DEM\Exception\RuntimeException; |
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use Runalyze\DEM\Provider\ProviderInterface; |
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class Reader implements ReaderInterface |
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{ |
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/** @var ProviderInterface[] */ |
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protected $Provider = []; |
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/** @var bool */ |
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protected $InvalidFlag = false; |
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/** |
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* @param ProviderInterface|null $provider |
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*/ |
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public function __construct(ProviderInterface $provider = null) |
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{ |
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if (null !== $provider) { |
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$this->addProvider($provider); |
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} |
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} |
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/** |
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* @param ProviderInterface $provider |
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*/ |
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public function addProvider(ProviderInterface $provider) |
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{ |
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$this->Provider[] = $provider; |
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} |
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/** |
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* @return int |
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*/ |
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public function numberOfProviders() |
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{ |
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return count($this->Provider); |
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} |
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/** |
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* @return bool |
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*/ |
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public function hasProviders() |
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{ |
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return !empty($this->Provider); |
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} |
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/** |
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* @param array $latitudeLongitudes array(array($lat, $lng), ...) |
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* @return bool |
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*/ |
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public function hasDataFor(array $latitudeLongitudes) |
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{ |
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foreach ($this->Provider as $provider) { |
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if ($provider->hasDataFor($latitudeLongitudes)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* @param array $latitudes |
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* @param array $longitudes |
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* @return array elevations [m] can be false if nothing retrieved |
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* @throws RuntimeException |
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*/ |
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public function getElevations(array $latitudes, array $longitudes) |
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{ |
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$boundaries = $this->getBoundsFor($latitudes, $longitudes); |
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foreach ($this->Provider as $provider) { |
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if ($provider->hasDataFor($boundaries)) { |
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return $provider->getElevations($latitudes, $longitudes); |
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} |
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} |
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throw new RuntimeException('No provider can handle the given locations.'); |
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} |
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/** |
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* @param float[] $latitudes |
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* @param float[] $longitudes |
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* @return array array(array($lat, $lng), ...) |
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*/ |
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protected function getBoundsFor(array $latitudes, array $longitudes) |
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{ |
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$filteredLatitudes = array_filter($latitudes); |
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$filteredLongitudes = array_filter($longitudes); |
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if (empty($filteredLatitudes) || empty($filteredLongitudes)) { |
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return []; |
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} |
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$minLatitude = min($filteredLatitudes); |
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$maxLatitude = max($filteredLatitudes); |
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$minLongitude = min($filteredLongitudes); |
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$maxLongitude = max($filteredLongitudes); |
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return [ |
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[$minLatitude, $minLongitude], |
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[$minLatitude, $maxLongitude], |
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[$maxLatitude, $minLongitude], |
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[$maxLatitude, $maxLongitude], |
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]; |
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} |
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} |
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Runalyze /
dem-reader
