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<?php
namespace Laravel\Prompts;
use ReflectionClass;
use RuntimeException;
use Symfony\Component\Console\Terminal as SymfonyTerminal;
class Terminal
{
/**
* The initial TTY mode.
*/
protected ?string $initialTtyMode;
/**
* The Symfony Terminal instance.
*/
protected SymfonyTerminal $terminal;
/**
* Create a new Terminal instance.
*/
public function __construct()
{
$this->terminal = new SymfonyTerminal;
}
/**
* Read a line from the terminal.
*/
public function read(): string
{
$input = fread(STDIN, 1024);
return $input !== false ? $input : '';
}
/**
* Set the TTY mode.
*/
public function setTty(string $mode): void
{
$this->initialTtyMode ??= $this->exec('stty -g');
$this->exec("stty $mode");
}
/**
* Restore the initial TTY mode.
*/
public function restoreTty(): void
{
if (isset($this->initialTtyMode)) {
$this->exec("stty {$this->initialTtyMode}");
$this->initialTtyMode = null;
}
}
/**
* Get the number of columns in the terminal.
*/
public function cols(): int
{
return $this->terminal->getWidth();
}
/**
* Get the number of lines in the terminal.
*/
public function lines(): int
{
return $this->terminal->getHeight();
}
/**
* (Re)initialize the terminal dimensions.
*/
public function initDimensions(): void
{
(new ReflectionClass($this->terminal))
->getMethod('initDimensions')
->invoke($this->terminal);
}
/**
* Exit the interactive session.
*/
public function exit(): void
{
exit(1);
}
/**
* Execute the given command and return the output.
*/
protected function exec(string $command): string
{
$process = proc_open($command, [
1 => ['pipe', 'w'],
2 => ['pipe', 'w'],
], $pipes);
if (! $process) {
throw new RuntimeException('Failed to create process.');
}
$stdout = stream_get_contents($pipes[1]);
$stderr = stream_get_contents($pipes[2]);
$code = proc_close($process);
if ($code !== 0 || $stdout === false) {
throw new RuntimeException(trim($stderr ?: "Unknown error (code: $code)"), $code);
}
return $stdout;
}
}
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