JsPush.php

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<?php
#require_once 'Zend/Json.php';

#require_once 'Zend/ProgressBar/Adapter.php';

class Zend_ProgressBar_Adapter_JsPush extends Zend_ProgressBar_Adapter
{
    protected $_updateMethodName = 'Zend_ProgressBar_Update';

    protected $_finishMethodName;

    public function setUpdateMethodName($methodName)
    {
        $this->_updateMethodName = $methodName;

        return $this;
    }

    public function setFinishMethodName($methodName)
    {
        $this->_finishMethodName = $methodName;

        return $this;
    }

    public function notify($current, $max, $percent, $timeTaken, $timeRemaining, $text)
    {
        $arguments = array(
            'current'       => $current,
            'max'           => $max,
            'percent'       => ($percent * 100),
            'timeTaken'     => $timeTaken,
            'timeRemaining' => $timeRemaining,
            'text'          => $text
        );

        $data = '<script type="text/javascript">'
              . 'parent.' . $this->_updateMethodName . '(' . Zend_Json::encode($arguments) . ');'
              . '</script>';

        // Output the data
        $this->_outputData($data);
    }

    public function finish()
    {
        if ($this->_finishMethodName === null) {
            return;
        }

        $data = '<script type="text/javascript">'
              . 'parent.' . $this->_finishMethodName . '();'
              . '</script>';

        $this->_outputData($data);
    }

    protected function _outputData($data)
    {
        // 1024 padding is required for Safari, while 256 padding is required
        // for Internet Explorer. The <br /> is required so Safari actually
        // executes the <script />
        echo str_pad($data . '<br />', 1024, ' ', STR_PAD_RIGHT) . "\n";

        flush();
        ob_flush();
    }
}