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<?php |
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namespace Jalle19\HaPHProxy; |
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use Jalle19\HaPHProxy\Exception\FileNotFoundException; |
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use Jalle19\HaPHProxy\Parameter\Parameter; |
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use Jalle19\HaPHProxy\Section\AbstractSection; |
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use Jalle19\HaPHProxy\Section\Factory; |
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/** |
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* Class Parser |
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* @package Jalle19\HaPHProxy |
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* @author Sam Stenvall <[email protected]> |
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* @license GNU General Public License 2.0+ |
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*/ |
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class Parser |
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{ |
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const MAGIC_COMMENT_PREFIX = '# HAPHPROXY_COMMENT'; |
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/** |
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* @var string |
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*/ |
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private $filePath; |
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/** |
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* Parser constructor. |
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* |
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* @param string $filePath |
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* |
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* @throws FileNotFoundException if the specified file could not be found or is not readable |
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*/ |
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public function __construct($filePath) |
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{ |
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if (!file_exists($filePath) || !is_readable($filePath)) { |
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throw new FileNotFoundException($filePath . ' not found or is not readable'); |
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} |
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$this->filePath = $filePath; |
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} |
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/** |
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* @return Configuration |
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*/ |
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public function parse() |
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{ |
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$configuration = new Configuration(); |
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$preface = ''; |
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/* @var AbstractSection|null $currentSection */ |
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$currentSection = null; |
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foreach ($this->getNormalizedConfigurationLines() as $line) { |
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// Parse preface |
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if ($currentSection === null && self::isComment($line)) { |
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$preface .= $line . PHP_EOL; |
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} |
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// Omit empty lines |
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if (empty($line)) { |
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continue; |
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} |
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// Check for section changes |
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$newSection = Factory::makeFactory($line); |
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if ($newSection !== null) { |
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$currentSection = $newSection; |
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$configuration->addSection($currentSection); |
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continue; |
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} |
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// Parse parameters into the current section |
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if ($currentSection !== null) { |
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// Distinguish between parameters and magic comments |
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if (self::isMagicComment($line)) { |
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$currentSection->addMagicComment(self::parseMagicComment($line)); |
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} else if (!self::isComment($line)) { |
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$currentSection->addParameter(self::parseParameter($line)); |
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} |
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} |
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} |
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if (!empty($preface)) { |
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$configuration->setPreface($preface); |
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} |
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return $configuration; |
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} |
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/** |
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* Reads the configuration and yields one line at a time |
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* |
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* @return \Generator |
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*/ |
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private function getConfigurationLines() |
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{ |
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$handle = fopen($this->filePath, "r"); |
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while (($line = fgets($handle)) !== false) { |
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yield $line; |
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} |
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} |
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/** |
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* @return \Generator |
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*/ |
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private function getNormalizedConfigurationLines() |
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{ |
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foreach ($this->getConfigurationLines() as $line) { |
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yield self::normalizeLine($line); |
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} |
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} |
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/** |
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* @param string $line |
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* |
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* @return string |
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*/ |
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private static function normalizeLine($line) |
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{ |
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return preg_replace('/\s+/', ' ', trim($line)); |
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} |
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/** |
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* @param string $line |
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* |
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* @return bool if the line is a comment |
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*/ |
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private static function isComment($line) |
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{ |
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return substr($line, 0, 1) === '#'; |
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} |
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/** |
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* @param string $line |
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* |
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* @return bool whether the line is a magic comment |
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*/ |
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private static function isMagicComment($line) |
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{ |
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return substr($line, 0, strlen(self::MAGIC_COMMENT_PREFIX)) === self::MAGIC_COMMENT_PREFIX; |
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} |
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/** |
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* @param string $line |
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* |
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* @return string |
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*/ |
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private static function parseMagicComment($line) |
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{ |
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return trim(substr($line, strlen(self::MAGIC_COMMENT_PREFIX))); |
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} |
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/** |
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* @param string $line |
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* |
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* @return Parameter |
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*/ |
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private static function parseParameter($line) |
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{ |
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$words = explode(' ', $line, 2); |
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if (count($words) > 1) { |
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list($name, $value) = $words; |
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return new Parameter($name, $value); |
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} |
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list($name) = $words; |
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return new Parameter($name); |
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} |
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} |
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Jalle19 /
haphproxy
