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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Console\Helper;
use Symfony\Component\Console\Output\OutputInterface;
/**
* The Progress class provides helpers to display progress output.
*
* @author Chris Jones <leeked@gmail.com>
* @author Fabien Potencier <fabien@symfony.com>
*/
class ProgressHelper extends Helper
{
const FORMAT_QUIET = ' %percent%%';
const FORMAT_NORMAL = ' %current%/%max% [%bar%] %percent%%';
const FORMAT_VERBOSE = ' %current%/%max% [%bar%] %percent%% Elapsed: %elapsed%';
const FORMAT_QUIET_NOMAX = ' %current%';
const FORMAT_NORMAL_NOMAX = ' %current% [%bar%]';
const FORMAT_VERBOSE_NOMAX = ' %current% [%bar%] Elapsed: %elapsed%';
// options
private $barWidth = 28;
private $barChar = '=';
private $emptyBarChar = '-';
private $progressChar = '>';
private $format = null;
private $redrawFreq = 1;
private $lastMessagesLength;
private $barCharOriginal;
/**
* @var OutputInterface
*/
private $output;
/**
* Current step
*
* @var integer
*/
private $current;
/**
* Maximum number of steps
*
* @var integer
*/
private $max;
/**
* Start time of the progress bar
*
* @var integer
*/
private $startTime;
/**
* List of formatting variables
*
* @var array
*/
private $defaultFormatVars = array(
'current',
'max',
'bar',
'percent',
'elapsed',
);
/**
* Available formatting variables
*
* @var array
*/
private $formatVars;
/**
* Stored format part widths (used for padding)
*
* @var array
*/
private $widths = array(
'current' => 4,
'max' => 4,
'percent' => 3,
'elapsed' => 6,
);
/**
* Various time formats
*
* @var array
*/
private $timeFormats = array(
array(0, '???'),
array(2, '1 sec'),
array(59, 'secs', 1),
array(60, '1 min'),
array(3600, 'mins', 60),
array(5400, '1 hr'),
array(86400, 'hrs', 3600),
array(129600, '1 day'),
array(604800, 'days', 86400),
);
/**
* Sets the progress bar width.
*
* @param int $size The progress bar size
*/
public function setBarWidth($size)
{
$this->barWidth = (int) $size;
}
/**
* Sets the bar character.
*
* @param string $char A character
*/
public function setBarCharacter($char)
{
$this->barChar = $char;
}
/**
* Sets the empty bar character.
*
* @param string $char A character
*/
public function setEmptyBarCharacter($char)
{
$this->emptyBarChar = $char;
}
/**
* Sets the progress bar character.
*
* @param string $char A character
*/
public function setProgressCharacter($char)
{
$this->progressChar = $char;
}
/**
* Sets the progress bar format.
*
* @param string $format The format
*/
public function setFormat($format)
{
$this->format = $format;
}
/**
* Sets the redraw frequency.
*
* @param int $freq The frequency in steps
*/
public function setRedrawFrequency($freq)
{
$this->redrawFreq = (int) $freq;
}
/**
* Starts the progress output.
*
* @param OutputInterface $output An Output instance
* @param integer|null $max Maximum steps
*/
public function start(OutputInterface $output, $max = null)
{
$this->startTime = time();
$this->current = 0;
$this->max = (int) $max;
$this->output = $output;
$this->lastMessagesLength = 0;
$this->barCharOriginal = '';
if (null === $this->format) {
switch ($output->getVerbosity()) {
case OutputInterface::VERBOSITY_QUIET:
$this->format = self::FORMAT_QUIET_NOMAX;
if ($this->max > 0) {
$this->format = self::FORMAT_QUIET;
}
break;
case OutputInterface::VERBOSITY_VERBOSE:
case OutputInterface::VERBOSITY_VERY_VERBOSE:
case OutputInterface::VERBOSITY_DEBUG:
$this->format = self::FORMAT_VERBOSE_NOMAX;
if ($this->max > 0) {
$this->format = self::FORMAT_VERBOSE;
}
break;
default:
$this->format = self::FORMAT_NORMAL_NOMAX;
if ($this->max > 0) {
$this->format = self::FORMAT_NORMAL;
}
break;
}
}
$this->initialize();
}
/**
* Advances the progress output X steps.
*
* @param integer $step Number of steps to advance
* @param Boolean $redraw Whether to redraw or not
*
* @throws \LogicException
*/
public function advance($step = 1, $redraw = false)
{
$this->setCurrent($this->current + $step, $redraw);
}
/**
* Sets the current progress.
*
* @param integer $current The current progress
* @param Boolean $redraw Whether to redraw or not
*
* @throws \LogicException
*/
public function setCurrent($current, $redraw = false)
{
if (null === $this->startTime) {
throw new \LogicException('You must start the progress bar before calling setCurrent().');
}
$current = (int) $current;
if ($current < $this->current) {
throw new \LogicException('You can\'t regress the progress bar');
}
if (0 === $this->current) {
$redraw = true;
}
$prevPeriod = intval($this->current / $this->redrawFreq);
$this->current = $current;
$currPeriod = intval($this->current / $this->redrawFreq);
if ($redraw || $prevPeriod !== $currPeriod || $this->max === $this->current) {
$this->display();
}
}
/**
* Outputs the current progress string.
*
* @param Boolean $finish Forces the end result
*
* @throws \LogicException
*/
public function display($finish = false)
{
if (null === $this->startTime) {
throw new \LogicException('You must start the progress bar before calling display().');
}
$message = $this->format;
foreach ($this->generate($finish) as $name => $value) {
$message = str_replace("%{$name}%", $value, $message);
}
$this->overwrite($this->output, $message);
}
/**
* Removes the progress bar from the current line.
*
* This is useful if you wish to write some output
* while a progress bar is running.
* Call display() to show the progress bar again.
*/
public function clear()
{
$this->overwrite($this->output, '');
}
/**
* Finishes the progress output.
*/
public function finish()
{
if (null === $this->startTime) {
throw new \LogicException('You must start the progress bar before calling finish().');
}
if (null !== $this->startTime) {
if (!$this->max) {
$this->barChar = $this->barCharOriginal;
$this->display(true);
}
$this->startTime = null;
$this->output->writeln('');
$this->output = null;
}
}
/**
* Initializes the progress helper.
*/
private function initialize()
{
$this->formatVars = array();
foreach ($this->defaultFormatVars as $var) {
if (false !== strpos($this->format, "%{$var}%")) {
$this->formatVars[$var] = true;
}
}
if ($this->max > 0) {
$this->widths['max'] = $this->strlen($this->max);
$this->widths['current'] = $this->widths['max'];
} else {
$this->barCharOriginal = $this->barChar;
$this->barChar = $this->emptyBarChar;
}
}
/**
* Generates the array map of format variables to values.
*
* @param Boolean $finish Forces the end result
*
* @return array Array of format vars and values
*/
private function generate($finish = false)
{
$vars = array();
$percent = 0;
if ($this->max > 0) {
$percent = (float) $this->current / $this->max;
}
if (isset($this->formatVars['bar'])) {
$completeBars = 0;
if ($this->max > 0) {
$completeBars = floor($percent * $this->barWidth);
} else {
if (!$finish) {
$completeBars = floor($this->current % $this->barWidth);
} else {
$completeBars = $this->barWidth;
}
}
$emptyBars = $this->barWidth - $completeBars - $this->strlen($this->progressChar);
$bar = str_repeat($this->barChar, $completeBars);
if ($completeBars < $this->barWidth) {
$bar .= $this->progressChar;
$bar .= str_repeat($this->emptyBarChar, $emptyBars);
}
$vars['bar'] = $bar;
}
if (isset($this->formatVars['elapsed'])) {
$elapsed = time() - $this->startTime;
$vars['elapsed'] = str_pad($this->humaneTime($elapsed), $this->widths['elapsed'], ' ', STR_PAD_LEFT);
}
if (isset($this->formatVars['current'])) {
$vars['current'] = str_pad($this->current, $this->widths['current'], ' ', STR_PAD_LEFT);
}
if (isset($this->formatVars['max'])) {
$vars['max'] = $this->max;
}
if (isset($this->formatVars['percent'])) {
$vars['percent'] = str_pad(floor($percent * 100), $this->widths['percent'], ' ', STR_PAD_LEFT);
}
return $vars;
}
/**
* Converts seconds into human-readable format.
*
* @param integer $secs Number of seconds
*
* @return string Time in readable format
*/
private function humaneTime($secs)
{
$text = '';
foreach ($this->timeFormats as $format) {
if ($secs < $format[0]) {
if (count($format) == 2) {
$text = $format[1];
break;
} else {
$text = ceil($secs / $format[2]).' '.$format[1];
break;
}
}
}
return $text;
}
/**
* Overwrites a previous message to the output.
*
* @param OutputInterface $output An Output instance
* @param string $message The message
*/
private function overwrite(OutputInterface $output, $message)
{
$length = $this->strlen($message);
// append whitespace to match the last line's length
if (null !== $this->lastMessagesLength && $this->lastMessagesLength > $length) {
$message = str_pad($message, $this->lastMessagesLength, "\x20", STR_PAD_RIGHT);
}
// carriage return
$output->write("\x0D");
$output->write($message);
$this->lastMessagesLength = $this->strlen($message);
}
/**
* {@inheritDoc}
*/
public function getName()
{
return 'progress';
}
}
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