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<?php |
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namespace VKBansal\FrontMatter; |
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use Symfony\Component\Yaml\Yaml; |
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/** |
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* FrontMatter Parser |
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* @package VKBansal\FrontMatter\Parser |
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* @version 1.3.0 |
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* @author Vivek Kumar Bansal <[email protected]> |
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* @license MIT |
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*/ |
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class Parser |
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{ |
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/** |
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* Regex for seperators |
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* @var string |
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*/ |
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private static $matcherRegex = "/^-{3}\s?(\w*)\r?\n(.*)\r?\n-{3}\r?\n(.*)/s"; |
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/** |
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* Constanst for Document::dump() |
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* @see Document::dump() |
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*/ |
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const DUMP_YAML = 'yaml'; |
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const DUMP_JSON = 'json'; |
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const DUMP_INI = 'ini'; |
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/** |
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* Parse the given content |
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* @param string $input content to be parsed |
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* @return Document |
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*/ |
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public static function parse($input) |
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{ |
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if (preg_match(self::$matcherRegex, $input, $matches)) { |
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$header = self::parseHeader($matches[2], strtolower($matches[1])); |
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$content = $matches[3]; |
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} else { |
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$content = $input; |
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$header = []; |
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} |
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return new Document($content, $header); |
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} |
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/** |
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* Convert a Document to string |
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* @param Document $document |
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* @return string |
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*/ |
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public static function dump (Document $document, $mode = null) |
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{ |
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switch ($mode) { |
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case 'yaml': |
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return "--- yaml\n".Yaml::dump($document->getConfig())."---\n".$document->getContent(); |
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case 'json': |
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return "--- json\n".json_encode($document->getConfig(), JSON_PRETTY_PRINT)."\n---\n".$document->getContent(); |
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case 'ini': |
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return "--- ini\n".self::dumpIni($document->getConfig())."---\n".$document->getContent(); |
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default: |
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return "---\n".Yaml::dump($document->getConfig())."---\n".$document->getContent(); |
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} |
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} |
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/** |
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* Determines if given content is valid |
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* @param string $input Input to be validated |
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* @return boolean True if valid else false |
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*/ |
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public static function isValid($input) |
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{ |
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return preg_match(self::$matcherRegex, $input) === 1; |
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} |
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/** |
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* Parses header |
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* @param string $header |
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* @param string $parser |
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* @return array|string |
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*/ |
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private static function parseHeader($header, $parser) |
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{ |
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switch($parser){ |
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case 'yaml': |
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return Yaml::parse($header); |
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case 'json': |
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return json_decode($header, true); |
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case 'ini': |
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return parse_ini_string($header, true); |
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default: |
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return Yaml::parse($header); |
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} |
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} |
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/** |
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* Encodes PHP array to ini string |
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* @param array $config |
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* @return string |
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*/ |
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private static function dumpIni(array $config) |
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{ |
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$sections = $globals = ''; |
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if (!empty($config)) { |
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foreach ($config as $section => $item) { |
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if (!is_array($item)) { |
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//To write globals at top |
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$globals .= "{$section} = {$item}\n"; |
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} else { |
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$sections = "\n[{$section}]\n"; |
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foreach ($item as $key => $value) { |
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if (is_array($value)) { |
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foreach ($value as $arrKey => $arrValue) { |
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$sections .= "{$key}[{$arrKey}] = $arrValue\n"; |
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} |
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} else { |
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$sections .= "{$key} = {$value}\n"; |
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} |
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} |
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} |
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} |
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} |
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return $globals.$sections; |
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} |
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} |
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If a method or function can return multiple different values and unless you are sure that you only can receive a single value in this context, we recommend to add an additional type check:
If this a common case that PHP Analyzer should handle natively, please let us know by opening an issue.