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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Celema\Console; |
| 6 | |
| 7 | use Attribute; |
| 8 | use ReflectionClass; |
| 9 | use ValueError; |
| 10 | |
| 11 | /** |
| 12 | * Declares a class as a console command. |
| 13 | * |
| 14 | * The name consists of letters, digits, `.`, `_`, and `-`, starts with a |
| 15 | * letter or digit, and is matched case-insensitively. It may carry a group |
| 16 | * prefix of the same form, separated by a single colon, e.g. `db:migrate`; |
| 17 | * any other name is rejected. |
| 18 | * The prefix namespaces the command on the command line. The help overview |
| 19 | * lists the command under its `group`, by default the capitalized prefix or, |
| 20 | * without one, General; commands with the same group share a section. |
| 21 | * |
| 22 | * The attribute and its properties are public API; the methods serve the |
| 23 | * runner. |
| 24 | * |
| 25 | * @api |
| 26 | */ |
| 27 | #[Attribute(Attribute::TARGET_CLASS)] |
| 28 | final class Command |
| 29 | { |
| 30 | /** |
| 31 | * A single colon only: a second one would collide with the prefixed |
| 32 | * lookup of another command. |
| 33 | */ |
| 34 | private const string NAME = '/^(?:([a-z0-9][a-z0-9._-]*):)?([a-z0-9][a-z0-9._-]*)\z/'; |
| 35 | |
| 36 | public readonly string $name; |
| 37 | public readonly string $prefix; |
| 38 | |
| 39 | public function __construct( |
| 40 | string $name, |
| 41 | public readonly string $description = '', |
| 42 | public readonly string $group = '', |
| 43 | ) { |
| 44 | if (preg_match(self::NAME, strtolower($name), $parts) !== 1) { |
| 45 | throw new ValueError("Invalid command name '{$name}'"); |
| 46 | } |
| 47 | |
| 48 | $this->prefix = $parts[1]; |
| 49 | $this->name = $parts[2]; |
| 50 | } |
| 51 | |
| 52 | /** @internal */ |
| 53 | public function full(): string |
| 54 | { |
| 55 | return $this->prefix === '' ? $this->name : "{$this->prefix}:{$this->name}"; |
| 56 | } |
| 57 | |
| 58 | /** @internal */ |
| 59 | public function title(): string |
| 60 | { |
| 61 | if ($this->group !== '') { |
| 62 | return $this->group; |
| 63 | } |
| 64 | |
| 65 | return $this->prefix === '' ? 'General' : ucfirst($this->prefix); |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * Reads the attribute off a command instance or class. |
| 70 | * |
| 71 | * @internal |
| 72 | * |
| 73 | * @param class-string|object $command |
| 74 | */ |
| 75 | public static function of(object|string $command): self |
| 76 | { |
| 77 | $class = is_object($command) ? $command::class : $command; |
| 78 | $attributes = new ReflectionClass($class)->getAttributes(self::class); |
| 79 | |
| 80 | if ($attributes === []) { |
| 81 | throw new ValueError("Command class '{$class}' has no #[Command] attribute"); |
| 82 | } |
| 83 | |
| 84 | return $attributes[0]->newInstance(); |
| 85 | } |
| 86 | } |