Number.php

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<?php

namespace Rsi\Fred\Controller\Widget;

class Number extends \Rsi\Fred\Controller\Widget{

  const DECIMALS = 'decimals'; //!< Number of decimals to use (for rounding).
  const ROUND = 'round'; //!< Rounding value (e.g. with rounding set to 5, 8 will become 10).
  const TRIM = 'trim'; //!< Trim the number to this many decimals (when zeros).

  public $round = null;
  public $trim = null;

  public function clientConfig(){
    return array_merge(parent::clientConfig(),[
      self::MIN => $this->min || $this->nothing($this->min) ? $this->min : '0.0', //otherwise it gets wiped
      self::MAX => $this->max || $this->nothing($this->max) ? $this->max : '0.0', //otherwise it gets wiped
      self::DECIMALS => $this->decimals,
      self::ROUND => $this->round,
      self::TRIM => $this->trim
    ]);
  }

  public function round($value){
    if($value === null) return null;
    $value = round($value,$this->decimals);
    return $this->round > 0 ? round($value / $this->round) * $this->round : $value;
  }

  public function convert($value){
    return \Rsi::nothing($value) ? null : $this->round($this->local->convertNumber($value,$this->decimals));
  }

  public function format($value,$trim = true){
    return $this->local->formatNumber($this->round($value),$this->decimals,$trim ? $this->trim : null);
  }

  public function checkFormat($value,$index = null){
    return preg_match('/^-?\\d+(\\.\\d+)?$/',$value);
  }

  public function getDecimals(){
    return $this->config(self::DECIMALS) ?: ($this->round ? max(0,(int)ceil(-log10($this->round))) : null);
  }

}