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height:90%'>&lt;?php

namespace Illuminate\Console;

use InvalidArgumentException;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputOption;

class Parser
{
    /**
     * Parse the given console command definition into an array.
     *
     * @param  string  $expression
     * @return array
     *
     * @throws \InvalidArgumentException
     */
    public static function parse(string $expression)
    {
        $name = static::name($expression);

        if (preg_match_all(&#039;/\{\s*(.*?)\s*\}/&#039;, $expression, $matches) &amp;&amp; count($matches[1])) {
            return array_merge([$name], static::parameters($matches[1]));
        }

        return [$name, [], []];
    }

    /**
     * Extract the name of the command from the expression.
     *
     * @param  string  $expression
     * @return string
     *
     * @throws \InvalidArgumentException
     */
    protected static function name(string $expression)
    {
        if (! preg_match(&#039;/[^\s]+/&#039;, $expression, $matches)) {
            throw new InvalidArgumentException(&#039;Unable to determine command name from signature.&#039;);
        }

        return $matches[0];
    }

    /**
     * Extract all parameters from the tokens.
     *
     * @param  array  $tokens
     * @return array
     */
    protected static function parameters(array $tokens)
    {
        $arguments = [];

        $options = [];

        foreach ($tokens as $token) {
            if (preg_match(&#039;/^-{2,}(.*)/&#039;, $token, $matches)) {
                $options[] = static::parseOption($matches[1]);
            } else {
                $arguments[] = static::parseArgument($token);
            }
        }

        return [$arguments, $options];
    }

    /**
     * Parse an argument expression.
     *
     * @param  string  $token
     * @return \Symfony\Component\Console\Input\InputArgument
     */
    protected static function parseArgument(string $token)
    {
        [$token, $description] = static::extractDescription($token);

        return match (true) {
            str_ends_with($token, &#039;?*&#039;) =&gt; new InputArgument(trim($token, &#039;?*&#039;), InputArgument::IS_ARRAY, $description),
            str_ends_with($token, &#039;*&#039;) =&gt; new InputArgument(trim($token, &#039;*&#039;), InputArgument::IS_ARRAY | InputArgument::REQUIRED, $description),
            str_ends_with($token, &#039;?&#039;) =&gt; new InputArgument(trim($token, &#039;?&#039;), InputArgument::OPTIONAL, $description),
            (bool) preg_match(&#039;/(.+)\=\*(.+)/&#039;, $token, $matches) =&gt; new InputArgument($matches[1], InputArgument::IS_ARRAY, $description, preg_split(&#039;/,\s?/&#039;, $matches[2])),
            (bool) preg_match(&#039;/(.+)\=(.+)/&#039;, $token, $matches) =&gt; new InputArgument($matches[1], InputArgument::OPTIONAL, $description, $matches[2]),
            default =&gt; new InputArgument($token, InputArgument::REQUIRED, $description),
        };
    }

    /**
     * Parse an option expression.
     *
     * @param  string  $token
     * @return \Symfony\Component\Console\Input\InputOption
     */
    protected static function parseOption(string $token)
    {
        [$token, $description] = static::extractDescription($token);

        $matches = preg_split(&#039;/\s*\|\s*/&#039;, $token, 2);

        $shortcut = null;

        if (isset($matches[1])) {
            $shortcut = $matches[0];
            $token = $matches[1];
        }

        return match (true) {
            str_ends_with($token, &#039;=&#039;) =&gt; new InputOption(trim($token, &#039;=&#039;), $shortcut, InputOption::VALUE_OPTIONAL, $description),
            str_ends_with($token, &#039;=*&#039;) =&gt; new InputOption(trim($token, &#039;=*&#039;), $shortcut, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY, $description),
            (bool) preg_match(&#039;/(.+)\=\*(.+)/&#039;, $token, $matches) =&gt; new InputOption($matches[1], $shortcut, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY, $description, preg_split(&#039;/,\s?/&#039;, $matches[2])),
            (bool) preg_match(&#039;/(.+)\=(.+)/&#039;, $token, $matches) =&gt; new InputOption($matches[1], $shortcut, InputOption::VALUE_OPTIONAL, $description, $matches[2]),
            default =&gt; new InputOption($token, $shortcut, InputOption::VALUE_NONE, $description),
        };
    }

    /**
     * Parse the token into its token and description segments.
     *
     * @param  string  $token
     * @return array
     */
    protected static function extractDescription(string $token)
    {
        $parts = preg_split(&#039;/\s+:\s+/&#039;, trim($token), 2);

        return count($parts) === 2 ? $parts : [$token, &#039;&#039;];
    }
}
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