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<?php |
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namespace Dallgoot\Yaml; |
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use Dallgoot\Yaml\Nodes as Nodes; |
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use Dallgoot\Yaml\Nodes\Blank; |
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use Dallgoot\Yaml\Regex; |
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use Dallgoot\Yaml\Nodes\Generic\NodeGeneric; |
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/** |
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* Analyzes $nodeString |
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* determines the appropriate NodeType |
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* constructs it |
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* and returns it |
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* |
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* @author Stéphane Rebai <[email protected]> |
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* @license Apache 2.0 |
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* @link https://github.com/dallgoot/yaml |
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*/ |
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class NodeFactory |
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{ |
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private const JSON_OPTIONS = \JSON_PARTIAL_OUTPUT_ON_ERROR | \JSON_UNESCAPED_SLASHES; |
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final public static function get(string $nodeString, int $line = 0, bool $debug = false): NodeGeneric |
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{ |
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$trimmed = ltrim($nodeString); |
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$match = (bool) preg_match(Regex::KEY, $trimmed, $matches); |
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$node = match(true) { |
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$trimmed === '' => new Blank($nodeString, $line), |
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str_starts_with($trimmed, '...') => new Nodes\DocEnd($nodeString, $line), |
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$match => new Nodes\Key($nodeString, $line, $matches), |
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default => self::onCharacter($trimmed[0], $nodeString, $line) |
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}; |
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if ($debug) echo $line . ":" . get_class($node) . "\n"; |
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return $node; |
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} |
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private static function onCharacter(string $first, string $nodeString, int $line): NodeGeneric |
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{ |
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return match ($first) { |
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'-' => self::onHyphen($nodeString, $line), |
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'>' => new Nodes\LiteralFolded($nodeString, $line), |
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'|' => new Nodes\Literal($nodeString, $line), |
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'"', "'" => self::onQuoted($first, $nodeString, $line), |
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'#' => new Nodes\Comment(ltrim($nodeString), $line), |
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'%' => self::onDirective($nodeString, $line), |
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'{', '[' => self::onCompact($nodeString, $line), |
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':' => new Nodes\SetValue($nodeString, $line), |
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'?' => new Nodes\SetKey($nodeString, $line), |
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'*', '&' => self::onNodeAction($nodeString, $line), |
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'!' => new Nodes\Tag($nodeString, $line), |
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default => new Nodes\Scalar($nodeString, $line), |
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}; |
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} |
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/** |
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* Return the correct Node Object between NodeComment OR NodeDirective |
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* |
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* @param string $nodeString The node string |
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* @param integer $line The line |
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* |
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* @return NodeGeneric |
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*/ |
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private static function onDirective(string $nodeString, int $line): NodeGeneric |
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{ |
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if ( |
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(bool) preg_match(Regex::DIRECTIVE_TAG, $nodeString) |
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|| (bool) preg_match(Regex::DIRECTIVE_VERSION, $nodeString) |
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) { |
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return new Nodes\Directive(ltrim($nodeString), $line); |
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} else { |
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throw new \ParseError("Invalid/Unknown Directive", 1); |
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} |
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} |
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/** |
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* Set $node type and value when $nodevalue starts with a quote (simple or double) |
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* |
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* @param string $nodeString The node value |
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* @param int $line The line |
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* |
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* @return NodeGeneric |
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*/ |
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private static function onQuoted(string $first, string $nodeString, int $line): NodeGeneric |
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{ |
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return Regex::isProperlyQuoted(trim($nodeString)) ? new Nodes\Quoted($nodeString, $line) |
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: new Nodes\Partial($nodeString, $line); |
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} |
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/** |
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* Determines the Node type and value when a compact object/array syntax is found |
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* |
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* @param string $nodeString The value assumed to start with { or [ or characters |
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* @param int $line The line |
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* |
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* @return NodeGeneric |
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*/ |
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private static function onCompact(string $nodeString, int $line): NodeGeneric |
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{ |
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json_decode($nodeString, false, 512, self::JSON_OPTIONS); |
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if (json_last_error() === \JSON_ERROR_NONE) { |
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return new Nodes\JSON($nodeString, $line); |
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} else { |
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$backtrack_setting = "pcre.backtrack_limit"; |
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ini_set($backtrack_setting, "-1"); |
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$isMapping = (bool) preg_match(Regex::MAPPING, trim($nodeString)); |
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$isSequence = (bool) preg_match(Regex::SEQUENCE, trim($nodeString)); |
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ini_restore($backtrack_setting); |
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return match(true) { |
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$isMapping => new Nodes\CompactMapping($nodeString, $line), |
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$isSequence => new Nodes\CompactSequence($nodeString, $line), |
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default => new Nodes\Partial($nodeString, $line), |
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}; |
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} |
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} |
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/** |
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* Determines Node type and value when an hyphen "-" is found |
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* |
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* @param string $nodeString The node string value |
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* @param int $line The line |
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* |
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* @return NodeGeneric |
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*/ |
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private static function onHyphen(string $nodeString, int $line): NodeGeneric |
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{ |
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return match(true) { |
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str_starts_with($nodeString, '---') => new Nodes\DocStart($nodeString, $line), |
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(bool) preg_match(Regex::ITEM, ltrim($nodeString)) => new Nodes\Item($nodeString, $line), |
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default => new Nodes\Scalar($nodeString, $line), |
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}; |
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} |
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/** |
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* Sets Node type and value according to $nodeString when one of these characters is found : !,&,* |
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* |
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* @param string $nodeString The node value |
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* @param int $line The line |
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* |
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*@todo replace $action[0] with $first if applicable |
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*/ |
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private static function onNodeAction(string $nodeString, int $line): NodeGeneric |
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{ |
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1 |
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if (!((bool) preg_match(Regex::NODE_ACTIONS, trim($nodeString), $matches))) { |
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return new Nodes\Scalar($nodeString, $line); |
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} |
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return new Nodes\Anchor($nodeString, $line); |
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} |
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} |
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dallgoot /
yaml
