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<?php
namespace Laravel\Prompts;
use Closure;
use InvalidArgumentException;
use RuntimeException;
use Throwable;
/**
* @template TSteps of iterable<mixed>|int
*/
class Progress extends Prompt
{
/**
* The current progress bar item count.
*/
public int $progress = 0;
/**
* The total number of steps.
*/
public int $total = 0;
/**
* The original value of pcntl_async_signals
*/
protected bool $originalAsync;
/**
* Create a new ProgressBar instance.
*
* @param TSteps $steps
*/
public function __construct(public string $label, public iterable|int $steps, public string $hint = '')
{
/** @phpstan-ignore assign.propertyType (PHPStan doesn't parse that we convert from iterable to int in the below match) */
$this->total = match (true) {
is_int($this->steps) => $this->steps,
is_countable($this->steps) => count($this->steps),
is_iterable($this->steps) => iterator_count($this->steps),
/** @phpstan-ignore match.unreachable (Technically we shouldn't be able to reach the default as should be int|countable|iterable ) */
default => throw new InvalidArgumentException('Unable to count steps.'),
};
if ($this->total === 0) {
throw new InvalidArgumentException('Progress bar must have at least one item.');
}
}
/**
* Map over the steps while rendering the progress bar.
*
* @template TReturn
*
* @param Closure((TSteps is int ? int : value-of<TSteps>), $this): TReturn $callback
* @return array<TReturn>
*
* @throws Throwable
*/
public function map(Closure $callback): array
{
$this->start();
$result = [];
try {
if (is_int($this->steps)) {
for ($i = 0; $i < $this->steps; $i++) {
$result[] = $callback($i, $this);
$this->advance();
}
} else {
foreach ($this->steps as $step) {
$result[] = $callback($step, $this);
$this->advance();
}
}
} catch (Throwable $e) {
$this->state = 'error';
$this->render();
$this->restoreCursor();
$this->resetSignals();
throw $e;
}
if ($this->hint !== '') {
// Just pause for one moment to show the final hint
// so it doesn't look like it was skipped
usleep(250_000);
}
$this->finish();
return $result;
}
/**
* Start the progress bar.
*/
public function start(): void
{
$this->capturePreviousNewLines();
if (function_exists('pcntl_signal')) {
$this->originalAsync = pcntl_async_signals(true);
pcntl_signal(SIGINT, function () {
$this->state = 'cancel';
$this->render();
exit();
});
}
$this->hideCursor();
$this->render();
$this->state = 'active';
}
/**
* Advance the progress bar.
*/
public function advance(int $step = 1): void
{
$this->progress += $step;
if ($this->progress > $this->total) {
$this->progress = $this->total;
}
$this->render();
}
/**
* Finish the progress bar.
*/
public function finish(): void
{
$this->state = 'submit';
$this->render();
$this->restoreCursor();
$this->resetSignals();
}
/**
* Force the progress bar to re-render.
*/
public function render(): void
{
parent::render();
}
/**
* Update the label.
*/
public function label(string $label): static
{
$this->label = $label;
return $this;
}
/**
* Update the hint.
*/
public function hint(string $hint): static
{
$this->hint = $hint;
return $this;
}
/**
* Get the completion percentage.
*/
public function percentage(): int|float
{
return $this->progress / $this->total;
}
/**
* Disable prompting for input.
*
* @throws RuntimeException
*/
public function prompt(): never
{
throw new RuntimeException('Progress Bar cannot be prompted.');
}
/**
* Get the value of the prompt.
*/
public function value(): bool
{
return true;
}
/**
* Reset the signal handling.
*/
protected function resetSignals(): void
{
if (isset($this->originalAsync)) {
pcntl_async_signals($this->originalAsync);
pcntl_signal(SIGINT, SIG_DFL);
}
}
/**
* Restore the cursor.
*/
public function __destruct()
{
$this->restoreCursor();
}
}