Adapter.php

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<?php
abstract class Zend_ProgressBar_Adapter
{
    protected $_skipOptions = array(
        'options',
        'config',
    );

    public function __construct($options = null)
    {
        if (is_array($options)) {
            $this->setOptions($options);
        } elseif ($options instanceof Zend_Config) {
            $this->setConfig($options);
        }
    }

    public function setConfig(Zend_Config $config)
    {
        $this->setOptions($config->toArray());

        return $this;
    }

    public function setOptions(array $options)
    {
        foreach ($options as $key => $value) {
            if (in_array(strtolower($key), $this->_skipOptions)) {
                continue;
            }

            $method = 'set' . ucfirst($key);
            if (method_exists($this, $method)) {
                $this->$method($value);
            }
        }

        return $this;
    }

    abstract public function notify($current, $max, $percent, $timeTaken, $timeRemaining, $text);

    abstract public function finish();
}