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| <?php | |
| namespace Shellbox\ShellParser; | |
| use Wikimedia\WikiPEG\InternalError; | |
| class Node { | |
| /** @var string The node type */ | |
| public $type; | |
| /** @var array The node contents (children) */ | |
| public $contents; | |
| /** | |
| * @param string $type | |
| * @param array|Node|string $contents | |
| */ | |
| public function __construct( $type, $contents ) { | |
| $this->type = $type; | |
| if ( !is_array( $contents ) ) { | |
| $contents = [ $contents ]; | |
| } | |
| foreach ( $contents as $i => $node ) { | |
| if ( !$node instanceof Node && !is_string( $node ) && !is_array( $node ) ) { | |
| $type = gettype( $node ); | |
| throw new InternalError( 'ShellParser error: node contents validation failed. ' . | |
| "Item $i is a $type." ); | |
| } | |
| } | |
| $this->contents = $contents; | |
| } | |
| /** | |
| * Dump a string representation for testing or debugging | |
| * | |
| * @return string | |
| */ | |
| public function dump() { | |
| $inner = self::dumpArray( $this->contents ); | |
| return "<{$this->type}>$inner</{$this->type}>"; | |
| } | |
| /** | |
| * Dump a string representation of a node array for testing or debugging | |
| * | |
| * @param array $array | |
| * @return string | |
| */ | |
| public static function dumpArray( $array ) { | |
| $inner = ''; | |
| foreach ( $array as $node ) { | |
| if ( $node instanceof Node ) { | |
| $inner .= $node->dump(); | |
| } elseif ( is_array( $node ) ) { | |
| $inner .= self::dumpArray( $node ); | |
| } else { | |
| $inner .= htmlspecialchars( $node, ENT_COMPAT ); | |
| } | |
| } | |
| return $inner; | |
| } | |
| public function traverse( callable $visitor, ...$args ) { | |
| $visitor( $this, ...$args ); | |
| self::traverseArray( $visitor, $this->contents, ...$args ); | |
| } | |
| public static function traverseArray( callable $visitor, $array, ...$args ) { | |
| foreach ( $array as $node ) { | |
| if ( $node instanceof Node ) { | |
| $node->traverse( $visitor, ...$args ); | |
| } elseif ( is_array( $node ) ) { | |
| self::traverseArray( $visitor, $node, ...$args ); | |
| } else { | |
| $visitor( $node, ...$args ); | |
| } | |
| } | |
| } | |
| } |