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<?php |
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namespace steevanb\PhpYaml; |
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use steevanb\PhpYaml\Exception\FunctionIdNotFoundException; |
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use steevanb\PhpYaml\Exception\FunctionNotFoundException; |
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use Symfony\Component\Yaml\Parser as SymfonyYamlParser; |
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class Parser extends SymfonyYamlParser |
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{ |
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/** @var array */ |
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protected static $functions = []; |
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/** |
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* @param string $id |
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* @param callable $callable |
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*/ |
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public static function addFunction($id, $callable) |
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{ |
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static::$functions[$id] = $callable; |
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} |
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public static function addFileFunction() |
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{ |
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static::addFunction('file', function($fileName) { |
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return file_get_contents($fileName); |
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}); |
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} |
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public static function addDateFunction() |
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{ |
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static::addFunction('date', function($date = null) { |
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return new \DateTime($date); |
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}); |
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} |
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/** |
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* @param string $value |
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* @param int $flags |
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* @return array|null |
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*/ |
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public function parse($value, $flags = 0) |
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{ |
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$return = parent::parse($value, $flags); |
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if (is_array($return)) { |
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$this->parseValues($return); |
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} |
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return $return; |
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} |
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/** |
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* @param array $values |
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* @return $this |
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* @throws \Exception |
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*/ |
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protected function parseValues(array &$values) |
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{ |
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foreach ($values as &$value) { |
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if (is_array($value)) { |
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$this->parseValues($value); |
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} elseif (is_string($value) && substr($value, 0, 1) === '<' && substr($value, -1) === '>') { |
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$functionId = null; |
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$parameters = []; |
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foreach (token_get_all('<?php ' . $value) as $token) { |
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if (is_array($token)) { |
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if ($token[0] === T_STRING && $functionId === null) { |
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$functionId = $token[1]; |
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} elseif ($token[0] === T_STRING) { |
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$parameters[] = $token[1]; |
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} elseif ($token[0] === T_CONSTANT_ENCAPSED_STRING) { |
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$parameters[] = substr($token[1], 1, -1); |
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} elseif ($token[0] === T_LNUMBER || $token[0] === T_DNUMBER) { |
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$parameters[] = $token[1]; |
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} |
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} |
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} |
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if ($functionId === null) { |
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throw new FunctionIdNotFoundException('Function name cannont be found in ' . $value . '.'); |
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} elseif (isset(static::$functions[$functionId]) === false) { |
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throw new FunctionNotFoundException('Function "' . $functionId . '" not found.'); |
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} |
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$value = call_user_func_array(static::$functions[$functionId], $parameters); |
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} |
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} |
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return $this; |
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} |
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} |
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steevanb /
php-yaml
