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<?php

namespace Spatie\ImageOptimizer;

use Psr\Log\LoggerInterface;
use Symfony\Component\Process\Process;

class OptimizerChain
{
    /* @var \Spatie\ImageOptimizer\Optimizer[] */
    protected $optimizers = [];

/** @var \Psr\Log\LoggerInterface */
    protected $logger;

/** @var int */
    protected $timeout = 60;

public function __construct()
    {
        $this->useLogger(new DummyLogger());
    }

public function getOptimizers(): array
    {
        return $this->optimizers;
    }

public function addOptimizer(Optimizer $optimizer)
    {
        $this->optimizers[] = $optimizer;

return $this;
    }

public function setOptimizers(array $optimizers)
    {
        $this->optimizers = [];

foreach ($optimizers as $optimizer) {
            $this->addOptimizer($optimizer);
        }

return $this;
    }

/*
     * Set the amount of seconds each separate optimizer may use.
     */
    public function setTimeout(int $timeoutInSeconds)
    {
        $this->timeout = $timeoutInSeconds;

return $this;
    }

public function useLogger(LoggerInterface $log)
    {
        $this->logger = $log;

return $this;
    }

public function optimize(string $pathToImage, string $pathToOutput = null)
    {
        if ($pathToOutput) {
            copy($pathToImage, $pathToOutput);

$pathToImage = $pathToOutput;
        }

$image = new Image($pathToImage);

$this->logger->info("Start optimizing {$pathToImage}");

foreach ($this->optimizers as $optimizer) {
            $this->applyOptimizer($optimizer, $image);
        }
    }

protected function applyOptimizer(Optimizer $optimizer, Image $image)
    {
        if (! $optimizer->canHandle($image)) {
            return;
        }

$optimizerClass = get_class($optimizer);

$this->logger->info("Using optimizer: `{$optimizerClass}`");

$optimizer->setImagePath($image->path());

$command = $optimizer->getCommand();

$this->logger->info("Executing `{$command}`");

$process = Process::fromShellCommandline($command);

$process
            ->setTimeout($this->timeout)
            ->run();

$this->logResult($process);
    }

protected function logResult(Process $process)
    {
        if (! $process->isSuccessful()) {
            $this->logger->error("Process errored with `{$process->getErrorOutput()}`");

return;
        }

$this->logger->info("Process successfully ended with output `{$process->getOutput()}`");
    }
}