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<?php |
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declare(strict_types=1); |
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namespace GarethEllis\Tldr\Console\Command; |
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use GarethEllis\Tldr\Cache\StashAdapter; |
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use GarethEllis\Tldr\Console\Output\PageOutput; |
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use GarethEllis\Tldr\Fetcher\CacheFetcher; |
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use GarethEllis\Tldr\Fetcher\Exception\RemoteFetcherException; |
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use Stash\Driver\FileSystem; |
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use Stash\Pool; |
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use Symfony\Component\Console\Command\Command; |
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use Symfony\Component\Console\Input\InputArgument; |
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use Symfony\Component\Console\Input\InputInterface; |
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use Symfony\Component\Console\Output\OutputInterface; |
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use GarethEllis\Tldr\Fetcher\RemoteFetcher; |
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use GuzzleHttp\Client as Http; |
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use GarethEllis\Tldr\Fetcher\Exception\PageNotFoundException; |
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class TldrCommand extends Command |
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{ |
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protected function configure() |
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{ |
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$this |
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->setName('tldr') |
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->setDescription('Perform a look-up against the TLDR man pages project') |
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->addArgument( |
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'page', |
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InputArgument::REQUIRED, |
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'Please specify a man page to look-up.' |
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) |
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; |
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} |
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protected function execute(InputInterface $input, OutputInterface $output) |
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{ |
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$http = new Http(); |
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$fetcher = new RemoteFetcher($http); |
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$driver = new FileSystem(); |
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$pool = new Pool($driver); |
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$cache = new StashAdapter($pool); |
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$fetcher = new CacheFetcher($fetcher, $cache); |
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try { |
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$page = $fetcher->fetchPage($input->getArgument("page")); |
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$pageOutput = new PageOutput($output); |
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$pageOutput->write($page); |
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} catch (PageNotFoundException $e) { |
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return $output->writeln("<comment>Page not found</comment>"); |
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} catch (RemoteFetcherException $e) { |
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return $output->writeln("<error>Unable to connect to repository :-(</error>"); |
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} |
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} |
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} |
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garethellis36 /
tldr-php
The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.