Stats.php

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<?php

namespace Rsi\Fred;

/**
 *  Statistics component.
 */
class Stats extends Component{

  public $path = null; //!< Path to flush (dump) the stats to.
  public $ext = '.stats';
  public $mode = 0666;
  public $ignoreAddr = []; //!< Addresses (subnets; CIDR notation) to ignore.

  protected $_stats = [];

  protected function init(){
    parent::init();
    $this->component('event')->listen(\Rsi\Fred::EVENT_HALT,[$this,'flush']);
  }
  /**
   * Add a statistic.
   * @param string $id  Name of the statistic (usually with a class name prefix).
   * @param float $delta  Value to add to the counter of this statistic.
   */
  public function inc($id,$delta = 0){
    if(\Rsi\Http::inSubnet($this->ignoreAddr,$this->component('security')->remoteAddr)) return false;
    $this->component('log')->debug(__CLASS__ . "::inc('$id',$delta)",__FILE__,__LINE__);
    $this->_stats[] = ['time' => time(),'id' => $id,'delta' => $delta];
  }
  /**
   * Flush statistics to disk.
   */
  public function flush(){
    if($this->path && $this->_stats){
      \Rsi\File::serialize(
        $this->path . \Rsi\Str::random() . $this->ext,
        [
          'addr' => $this->component('security')->remoteAddr,
          'ua' => $this->component('client')->userAgent,
          'stats' => $this->_stats
        ],
        $this->mode
      );
      $this->_stats = [];
    }
  }

}