trueskill/src/FactorGraphs/ScheduleLoop.php

<?php namespace Moserware\Skills\FactorGraphs;

class ScheduleLoop extends Schedule
{
    private $_maxDelta;
    private $_scheduleToLoop;

    public function __construct($name, Schedule $scheduleToLoop, $maxDelta)
    {
        parent::__construct($name);
        $this->_scheduleToLoop = $scheduleToLoop;
        $this->_maxDelta = $maxDelta;
    }

    public function visit($depth = -1, $maxDepth = 0)
    {
        $totalIterations = 1;
        $delta = $this->_scheduleToLoop->visit($depth + 1, $maxDepth);
        while ($delta > $this->_maxDelta) {
            $delta = $this->_scheduleToLoop->visit($depth + 1, $maxDepth);
            $totalIterations++;
        }

        return $delta;
    }
}