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<?php
/**
* PHP Command Line Tools
*
* This source file is subject to the MIT license that is bundled
* with this package in the file LICENSE.
*
* @author James Logsdon <dwarf@girsbrain.org>
* @copyright 2010 James Logsdom (http://girsbrain.org)
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
namespace cli;
/**
* A more complex type of Notifier, `Progress` Notifiers always have a maxim
* value and generally show some form of percent complete or estimated time
* to completion along with the standard Notifier displays.
*
* @see cli\Notify
*/
abstract class Progress extends \cli\Notify {
protected $_total = 0;
/**
* Instantiates a Progress Notifier.
*
* @param string $msg The text to display next to the Notifier.
* @param int $total The total number of ticks we will be performing.
* @param int $interval The interval in milliseconds between updates.
* @throws \InvalidArgumentException Thrown if `$total` is less than 0.
*/
public function __construct($msg, $total, $interval = 100) {
parent::__construct($msg, $interval);
$this->_total = (int)$total;
if ($this->_total < 0) {
throw new \InvalidArgumentException('Maximum value out of range, must be positive.');
}
}
/**
* Behaves in a similar manner to `cli\Notify::current()`, but the output
* is padded to match the length of `cli\Progress::total()`.
*
* @return string The formatted and padded tick count.
* @see cli\Progress::total()
*/
public function current() {
$size = strlen($this->total());
return str_pad(parent::current(), $size);
}
/**
* Returns the formatted total expected ticks.
*
* @return string The formatted total ticks.
*/
public function total() {
return number_format($this->_total);
}
/**
* Calculates the estimated total time for the tick count to reach the
* total ticks given.
*
* @return int The estimated total number of seconds for all ticks to be
* completed. This is not the estimated time left, but total.
* @see cli\Notify::speed()
* @see cli\Notify::elapsed()
*/
public function estimated() {
$speed = $this->speed();
if (!$speed || !$this->elapsed()) {
return 0;
}
$estimated = round($this->_total / $speed);
return $estimated;
}
/**
* Forces the current tick count to the total ticks given at instatiation
* time before passing on to `cli\Notify::finish()`.
*/
public function finish() {
$this->_current = $this->_total;
parent::finish();
}
/**
* Increments are tick counter by the given amount. If no amount is provided,
* the ticker is incremented by 1.
*
* @param int $increment The amount to increment by.
*/
public function increment($increment = 1) {
$this->_current = min($this->_total, $this->_current + $increment);
}
/**
* Calculate the percentage completed.
*
* @return float The percent completed.
*/
public function percent() {
if ($this->_total == 0) {
return 1;
}
return ($this->_current / $this->_total);
}
}
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