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class Zend_View_Helper_Duration extends Zend_View_Helper_Abstract {
    public function duration(Zend_Measure_Time $duration) {
        $this->duration = $duration->setType(\Zend_Measure_Time::SECOND);
        return clone $this;
    } 
    public function setFormat(\SplString $format) {
        $this->format = $format;
        return $this;
    } 
    public function setResolution($resolution) {
        $this->size = array_search($resolution, $this->resolutions);
        if (false === $this->size) {
            $this->size = 1;        }
        return $this;
    }
 
    public function setPrecision(\SplInt $precision) {        $this->precision = $precision;
        return $this;
    }
 
    public function render() {        $specifiers = array_combine(array_keys($this->resolutions), array ('y','w','d','h','m','s'));
        $output = $this->format;
        $chunks = $this->chunk();
 
        foreach ($specifiers as $size => $specifier) {            $count = preg_match("/%([^ywdhmsD]*)$specifier/", $output, $matches);
            if (0 < $count) {
                $letter = ($size === $this->size && 0 < $this->precision ? 'f' : 'd');
                $output = str_replace($matches[0], sprintf('%' . $matches[1] . $letter, $chunks[$size]), $output);
            }        }
 
        $count = preg_match("/%([^ywdhmsD]*)D/", $output, $matches);
        if (0 < $count) {
            $output = str_replace($matches[0], sprintf('%' . $matches[1] . 'd', (int)$this->duration->getValue()), $output);        }
 
        return $output;
    }
     public function __toString() {
        return $this->render();
    }
    protected $duration;
    protected $format = '%D';    protected $size = 1;
    protected $precision = 0;
    protected $resolutions = array (
                                31449600 => Zend_Measure_Time::YEAR,
                                604800 => Zend_Measure_Time::WEEK,                                86400 => Zend_Measure_Time::DAY,
                                3600 => Zend_Measure_Time::HOUR,
                                60 => Zend_Measure_Time::MINUTE,
                                1 => Zend_Measure_Time::SECOND,
                            );    protected function chunk() {
        $chunks = array_combine(array_keys($this->resolutions), array (0,0,0,0,0,0));
        $remainder = (int)$this->duration->getValue();
        foreach ($this->resolutions as $size => $resolution) {
            if ($seconds <= $remainder) {                $chunks[$size] = $value = floor($remainder / $size);
                $remainder -= ($size * $value);
 
            } else {
                $chunks[$size] = 0;            }
 
            if ($size === $this->size || 1 === $size) {
                $chunks[$size] += round($remainder / $size, $this->precision);
                break;            }
        }
 
        return $chunks;
    }}
?>