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<?php |
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declare(strict_types=1); |
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namespace PierInfor\Gears\Components; |
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use PierInfor\Gears\Entity\Gears; |
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use PierInfor\Gears\Entity\Gear; |
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/** |
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* System calculate system of gears |
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* |
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*/ |
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class System implements SystemInterface |
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{ |
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/** @var Gears */ |
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protected Gears $gears; |
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/** @var Gear */ |
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protected Gear $previousGear; |
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/** |
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* ctor |
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*/ |
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public function __construct() |
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{ |
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$this->gears = (new Gears()); |
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} |
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/** |
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* load gears from json file |
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*/ |
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public function load(string $filename): System |
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{ |
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if (file_exists($filename)) { |
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$content = file_get_contents($filename); |
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$obj = json_decode($content); |
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unset($content); |
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if (false != $obj) { |
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$this->gears->hydrate($obj); |
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} |
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unset($obj); |
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} |
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return $this; |
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} |
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/** |
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* process gear system |
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*/ |
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public function process(): System |
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{ |
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$cpt = 0; |
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$gears = $this->gears->getGears(); |
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if (count($gears) > 0) { |
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$forward = $gears[0]->getForward(); |
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foreach ($gears as $gear) { |
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if ($gear instanceof Gear) { |
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if ($cpt != 0) { |
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if (!$gear->getComposed()) { |
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$forward = !$forward; |
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} |
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$gears[$cpt]->setForward($forward); |
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$ratio = $this->ratio($this->previousGear->getTeeth(), $gear->getTeeth()); |
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$rpm = (!$gear->getComposed()) |
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? $this->speedOut($this->previousGear->getSpeed(), $ratio) |
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: $this->previousGear->getSpeed(); |
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$gears[$cpt]->setSpeed($rpm); |
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$torque = (!$gear->getComposed()) |
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? $this->torqueOut($ratio, $this->previousGear->getTorque()) |
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: $this->previousGear->getTorque(); |
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$gears[$cpt]->setTorque($torque); |
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} |
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$this->previousGear = $gear; |
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} |
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$cpt++; |
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} |
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$this->gears->setGears($gears); |
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} |
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return $this; |
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} |
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/** |
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* returns gears |
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* @return Gears |
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*/ |
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public function getGears(): Gears |
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{ |
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return $this->gears; |
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} |
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/** |
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* returns system as string |
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* @return string |
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*/ |
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public function __toString(): string |
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{ |
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$lines = sprintf( |
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static::_TITLE_FMT, |
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static::_ID, |
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static::_TEETH, |
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static::_TORQUE, |
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static::_SPEED, |
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static::_FORWARD, |
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static::_COMPOSED |
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); |
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$gears = $this->getGears()->getGears(); |
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foreach ($gears as $gear) { |
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$lines .= sprintf( |
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static::_ITEMS_FMT, |
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$gear->getId(), |
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$gear->getTeeth(), |
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$gear->getTorque(), |
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$gear->getSpeed(), |
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$gear->getForward() ? static::_TRUE : static::_FALSE, |
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$gear->getComposed() ? static::_TRUE : static::_FALSE, |
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); |
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} |
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unset($gears); |
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return $lines; |
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} |
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/** |
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* returns teeth ratio |
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*/ |
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protected function ratio(float $nbTeethIn, float $nbTeethOut): float |
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{ |
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if ($nbTeethIn == 0) { |
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return 0; |
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} |
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return $nbTeethOut / $nbTeethIn; |
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} |
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/** |
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* returns speed in Rpm |
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*/ |
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protected function speedOut(float $rmpIn, float $ratio): float |
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{ |
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if ($ratio == 0) { |
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return 0; |
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} |
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return $rmpIn / $ratio; |
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} |
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/** |
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* return torque in Nm |
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*/ |
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protected function torqueOut(float $ratio, float $torqueIn): float |
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{ |
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return $ratio * $torqueIn; |
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} |
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} |
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pierre-fromager /
gears
