Chris@13: <?php
Chris@13: 
Chris@13: /*
Chris@13:  * This file is part of Psy Shell.
Chris@13:  *
Chris@13:  * (c) 2012-2018 Justin Hileman
Chris@13:  *
Chris@13:  * For the full copyright and license information, please view the LICENSE
Chris@13:  * file that was distributed with this source code.
Chris@13:  */
Chris@13: 
Chris@13: namespace Psy\Command;
Chris@13: 
Chris@13: use Symfony\Component\Console\Helper\TableHelper;
Chris@13: use Symfony\Component\Console\Input\InputArgument;
Chris@13: use Symfony\Component\Console\Input\InputInterface;
Chris@13: use Symfony\Component\Console\Output\OutputInterface;
Chris@13: 
Chris@13: /**
Chris@13:  * Help command.
Chris@13:  *
Chris@13:  * Lists available commands, and gives command-specific help when asked nicely.
Chris@13:  */
Chris@13: class HelpCommand extends Command
Chris@13: {
Chris@13:     private $command;
Chris@13: 
Chris@13:     /**
Chris@13:      * {@inheritdoc}
Chris@13:      */
Chris@13:     protected function configure()
Chris@13:     {
Chris@13:         $this
Chris@13:             ->setName('help')
Chris@13:             ->setAliases(['?'])
Chris@13:             ->setDefinition([
Chris@13:                 new InputArgument('command_name', InputArgument::OPTIONAL, 'The command name.', null),
Chris@13:             ])
Chris@13:             ->setDescription('Show a list of commands. Type `help [foo]` for information about [foo].')
Chris@13:             ->setHelp('My. How meta.');
Chris@13:     }
Chris@13: 
Chris@13:     /**
Chris@13:      * Helper for setting a subcommand to retrieve help for.
Chris@13:      *
Chris@13:      * @param Command $command
Chris@13:      */
Chris@13:     public function setCommand($command)
Chris@13:     {
Chris@13:         $this->command = $command;
Chris@13:     }
Chris@13: 
Chris@13:     /**
Chris@13:      * {@inheritdoc}
Chris@13:      */
Chris@13:     protected function execute(InputInterface $input, OutputInterface $output)
Chris@13:     {
Chris@13:         if ($this->command !== null) {
Chris@13:             // help for an individual command
Chris@13:             $output->page($this->command->asText());
Chris@13:             $this->command = null;
Chris@13:         } elseif ($name = $input->getArgument('command_name')) {
Chris@13:             // help for an individual command
Chris@13:             $output->page($this->getApplication()->get($name)->asText());
Chris@13:         } else {
Chris@13:             // list available commands
Chris@13:             $commands = $this->getApplication()->all();
Chris@13: 
Chris@13:             $table = $this->getTable($output);
Chris@13: 
Chris@13:             foreach ($commands as $name => $command) {
Chris@13:                 if ($name !== $command->getName()) {
Chris@13:                     continue;
Chris@13:                 }
Chris@13: 
Chris@13:                 if ($command->getAliases()) {
Chris@17:                     $aliases = \sprintf('<comment>Aliases:</comment> %s', \implode(', ', $command->getAliases()));
Chris@13:                 } else {
Chris@13:                     $aliases = '';
Chris@13:                 }
Chris@13: 
Chris@13:                 $table->addRow([
Chris@17:                     \sprintf('<info>%s</info>', $name),
Chris@13:                     $command->getDescription(),
Chris@13:                     $aliases,
Chris@13:                 ]);
Chris@13:             }
Chris@13: 
Chris@13:             $output->startPaging();
Chris@13:             if ($table instanceof TableHelper) {
Chris@13:                 $table->render($output);
Chris@13:             } else {
Chris@13:                 $table->render();
Chris@13:             }
Chris@13:             $output->stopPaging();
Chris@13:         }
Chris@13:     }
Chris@13: }