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   1  <?php
   2  
   3  abstract class AphrontBarView extends AphrontView {
   4  
   5    private $color;
   6    private $caption = '';
   7  
   8    const COLOR_DEFAULT   = 'default';
   9    const COLOR_WARNING   = 'warning';
  10    const COLOR_DANGER    = 'danger';
  11  
  12    const COLOR_AUTO_BADNESS  = 'auto_badness';   // more = bad!  :(
  13    const COLOR_AUTO_GOODNESS = 'auto_goodness';  // more = good! :)
  14  
  15    const THRESHOLD_DANGER  = 0.85;
  16    const THRESHOLD_WARNING = 0.75;
  17  
  18    abstract protected function getRatio();
  19  
  20    abstract protected function getDefaultColor();
  21  
  22    final public function setColor($color) {
  23      $this->color = $color;
  24      return $this;
  25    }
  26  
  27    final public function setCaption($text) {
  28      $this->caption = $text;
  29      return $this;
  30    }
  31  
  32    final protected function getColor() {
  33      $color = $this->color;
  34      if (!$color) {
  35        $color = $this->getDefaultColor();
  36      }
  37  
  38      switch ($color) {
  39        case self::COLOR_DEFAULT:
  40        case self::COLOR_WARNING:
  41        case self::COLOR_DANGER:
  42          return $color;
  43      }
  44  
  45      $ratio = $this->getRatio();
  46      if ($color === self::COLOR_AUTO_GOODNESS) {
  47        $ratio = 1.0 - $ratio;
  48      }
  49  
  50      if ($ratio >= self::THRESHOLD_DANGER) {
  51        return self::COLOR_DANGER;
  52      } else if ($ratio >= self::THRESHOLD_WARNING) {
  53        return self::COLOR_WARNING;
  54      } else {
  55        return self::COLOR_DEFAULT;
  56      }
  57    }
  58  
  59    final protected function getCaption() {
  60      return $this->caption;
  61    }
  62  
  63  }