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