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<?php |
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/** |
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* This file is part of fswatch |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace Slick\FsWatch; |
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use Slick\FsWatch\Directory\Changes; |
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use Slick\FsWatch\Directory\FileChange; |
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use Slick\FsWatch\Directory\Snapshot; |
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use Slick\FsWatch\Exception\InvalidWatcherCallback; |
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/** |
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* Watcher |
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* |
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* @package Slick\FsWatch |
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*/ |
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final class Watcher |
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{ |
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public const SIGINT = 'SIGINT'; |
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public const ONCE = 'ONCE'; |
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public const FIRST_CHANGE = 'FIRST_CHANGE'; |
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/** @var callable|array<object|string> */ |
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private mixed $callback; |
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private Snapshot $snapshot; |
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private ?FileChange $lastChange = null; |
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private ?Changes $changes = null; |
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public function __construct(private readonly Directory $directory, mixed $callback) |
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{ |
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$this->callback = $callback; |
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$this->snapshot = new Snapshot($this->directory); |
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} |
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public function watch(mixed $exitStm = self::SIGINT, int $interval = 10): void |
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{ |
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while ($this->checkExit($exitStm)) { |
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$snapshot = $this->directory->snapshot(); |
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if ($this->snapshot->hash() !== $snapshot->hash()) { |
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$this->changes = $this->snapshot->compareTo($snapshot); |
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$this->snapshot = $snapshot; |
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foreach ($this->changes as $file => $change) { |
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$this->lastChange = $change; |
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call_user_func([$this, "callback"], $file, $change); |
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} |
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} |
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sleep($interval); |
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} |
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} |
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private function checkExit(mixed $exitStm): bool |
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{ |
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static $runs = -1; |
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if (is_callable($exitStm)) { |
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return !$exitStm(++$runs, $this->changes); |
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} |
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1 |
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$runs++; |
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return match ($exitStm) { |
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self::SIGINT => true, |
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self::ONCE => $runs < 1, |
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self::FIRST_CHANGE => is_null($this->lastChange), |
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default => !$exitStm |
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1 |
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}; |
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} |
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private function callback(string $file, FileChange $changes): void |
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{ |
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if (!is_callable($this->callback)) { |
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throw new InvalidWatcherCallback( |
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"Invalid callback passed to directory {$this->directory->path()} watcher." |
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); |
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} |
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($this->callback)($file, $changes); |
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} |
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} |
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slickframework /
fswatch
