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<?php |
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/* |
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* (c) Jean-François Lépine <https://twitter.com/Halleck45> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Hal\Component\Parser\Resolver; |
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use Hal\Component\Parser\Exception\IncorrectSyntaxException; |
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use Hal\Component\Token\Token; |
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class NamespaceResolver |
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{ |
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/** |
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* @var array |
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*/ |
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private $namespaces; |
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/** |
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* @var string |
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*/ |
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private $currentNamespace = '\\'; |
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/** |
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* @param $tokens |
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*/ |
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public function __construct($tokens) |
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{ |
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$len = sizeof($tokens); |
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for ($i = 0; $i < $len; $i++) { |
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// stop when class or function is detected |
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if (in_array($tokens[$i], array(Token::T_CLASS, Token::T_FUNCTION))) { |
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break; |
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} |
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$next = $i + 1; |
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// "namespace" token |
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if (Token::T_NAMESPACE === $tokens[$i]) { |
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if (!isset($tokens[$next])) { |
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throw new IncorrectSyntaxException; |
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} |
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$this->currentNamespace = '\\' . $tokens[$next]; |
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continue; |
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} |
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// "use" token |
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if (Token::T_USE === $tokens[$i]) { |
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$i = $i + 1; |
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if (!isset($tokens[$next])) { |
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throw new IncorrectSyntaxException; |
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} |
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// name of class |
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$name = $alias = $tokens[$next]; |
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// alias |
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if (isset($tokens[$next + 1], $tokens[$next + 2]) |
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&& Token::T_AS == $tokens[$next + 1] |
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) { |
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$i = $i + 2; |
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$alias = $tokens[$next + 2]; |
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} |
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$this->namespaces[$alias] = $name; |
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continue; |
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} |
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} |
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} |
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/** |
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* @return array |
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*/ |
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public function all() |
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{ |
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return $this->namespaces; |
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} |
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/** |
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* @return string |
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*/ |
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public function getCurrentNamespace() |
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{ |
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return $this->currentNamespace; |
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} |
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/** |
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* @param $alias |
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* @return string |
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*/ |
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public function resolve($alias) |
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{ |
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if (preg_match('!^(parent|static|self)$!i', $alias)) { |
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return $alias; |
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} |
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if ($this->has($alias) && '\\' == $this->namespaces[$alias][0]) { |
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return $this->namespaces[$alias]; |
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} |
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if ('\\' === $alias[0]) { |
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return $alias; |
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} |
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if ($this->has('\\' . $alias)) { |
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return '\\' . $alias; |
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} |
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if ($this->has($alias)) { |
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return sprintf('%s\\%s', $this->currentNamespace, $this->namespaces[$alias]); |
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} |
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return sprintf('%s\\%s', $this->currentNamespace, $alias); |
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} |
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/** |
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* @param $alias |
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* @return bool |
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*/ |
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public function has($alias) |
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{ |
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return isset($this->namespaces[$alias]); |
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} |
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} |
phpmetrics /
PhpMetrics
