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✏️ Editing: Spinner.php

<?php

namespace Laravel\Prompts;

use Closure;
use RuntimeException;

class Spinner extends Prompt
{
    /**
     * How long to wait between rendering each frame.
     */
    public int $interval = 100;

/**
     * The number of times the spinner has been rendered.
     */
    public int $count = 0;

/**
     * Whether the spinner can only be rendered once.
     */
    public bool $static = false;

/**
     * The process ID after forking.
     */
    protected int $pid;

/**
     * Create a new Spinner instance.
     */
    public function __construct(public string $message = '')
    {
        //
    }

/**
     * Render the spinner and execute the callback.
     *
     * @template TReturn of mixed
     *
     * @param  \Closure(): TReturn  $callback
     * @return TReturn
     */
    public function spin(Closure $callback): mixed
    {
        $this->capturePreviousNewLines();

if (! function_exists('pcntl_fork')) {
            return $this->renderStatically($callback);
        }

$originalAsync = pcntl_async_signals(true);

pcntl_signal(SIGINT, fn () => exit());

try {
            $this->hideCursor();
            $this->render();

$this->pid = pcntl_fork();

if ($this->pid === 0) {
                while (true) { // @phpstan-ignore-line
                    $this->render();

$this->count++;

usleep($this->interval * 1000);
                }
            } else {
                $result = $callback();

$this->resetTerminal($originalAsync);

return $result;
            }
        } catch (\Throwable $e) {
            $this->resetTerminal($originalAsync);

throw $e;
        }
    }

/**
     * Reset the terminal.
     */
    protected function resetTerminal(bool $originalAsync): void
    {
        pcntl_async_signals($originalAsync);
        pcntl_signal(SIGINT, SIG_DFL);

$this->eraseRenderedLines();
    }

/**
     * Render a static version of the spinner.
     *
     * @template TReturn of mixed
     *
     * @param  \Closure(): TReturn  $callback
     * @return TReturn
     */
    protected function renderStatically(Closure $callback): mixed
    {
        $this->static = true;

try {
            $this->hideCursor();
            $this->render();

$result = $callback();
        } finally {
            $this->eraseRenderedLines();
        }

return $result;
    }

/**
     * Disable prompting for input.
     *
     * @throws \RuntimeException
     */
    public function prompt(): never
    {
        throw new RuntimeException('Spinner cannot be prompted.');
    }

/**
     * Get the current value of the prompt.
     */
    public function value(): bool
    {
        return true;
    }

/**
     * Clear the lines rendered by the spinner.
     */
    protected function eraseRenderedLines(): void
    {
        $lines = explode(PHP_EOL, $this->prevFrame);
        $this->moveCursor(-999, -count($lines) + 1);
        $this->eraseDown();
    }

/**
     * Clean up after the spinner.
     */
    public function __destruct()
    {
        if (! empty($this->pid)) {
            posix_kill($this->pid, SIGHUP);
        }

parent::__destruct();
    }
}

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