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<?php |
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namespace nochso\Omni; |
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/** |
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* Path helps keep the directory separator/implode/trim/replace madness away. |
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*/ |
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final class Path |
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{ |
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/** |
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* Combine any amount of strings into a path. |
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* |
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* @param string|array ...$paths One or as many parameters as you need. Both strings and arrays of strings can be mixed. |
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* |
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* @return string The combined paths. Note that the directory separators will be changed to reflect the local system. |
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*/ |
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public static function combine(...$paths) |
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{ |
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// Flatten into simple array |
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$paths = Arrays::flatten(...$paths); |
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// Keep non-empty elements |
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$paths = array_filter($paths, 'strlen'); |
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// Split into scheme:// and rest |
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$scheme = self::extractScheme($paths); |
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// Implode, localize and simplify everything after scheme:// |
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$path = implode(DIRECTORY_SEPARATOR, $paths); |
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$path = self::localize($path); |
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$quotedSeparator = preg_quote(DIRECTORY_SEPARATOR); |
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$pattern = '#' . $quotedSeparator . '+#'; |
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$path = preg_replace($pattern, $quotedSeparator, $path); |
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return $scheme . $path; |
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} |
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/** |
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* Localize directory separators for any file path according to current environment. |
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* |
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* @param string $path |
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* @param string $directorySeparator |
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* |
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* @return string |
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*/ |
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public static function localize($path, $directorySeparator = DIRECTORY_SEPARATOR) |
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{ |
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$paths = [$path]; |
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// Do not localize scheme:// paths |
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$scheme = self::extractScheme($paths); |
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if ($scheme !== '') { |
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return $path; |
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} |
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$path = str_replace(['\\', '/'], $directorySeparator, $path); |
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return $path; |
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} |
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/** |
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* Contains returns true if a base path contains a needle. |
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* |
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* Note that `realpath` is used on both base and needle: they need to exist or false is returned. |
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* |
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* Use this for avoiding directory traversal outside of a base path. |
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* |
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* @param string $base Path to base directory. |
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* @param string $needle Needle that must exist within the base directory. |
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* |
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* @return bool True if both exist and needle does not escape the base folder. |
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*/ |
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public static function contains($base, $needle) |
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{ |
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$realBase = realpath($base); |
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$needle = realpath($needle); |
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if ($realBase === false || $needle === false) { |
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return false; |
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} |
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return Strings::startsWith($needle, $base); |
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} |
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/** |
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* isAbsolute checks for an absolute UNIX, Windows or scheme:// path. |
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* |
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* Note that paths containing parent dots (`..`) can still be considered absolute. |
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* |
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* @param string $path |
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* |
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* @return bool True if the path is absolute i.e. it should be safe to append a relative path to it. |
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*/ |
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public static function isAbsolute($path) |
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{ |
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$pattern = '@^ |
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( # Either.. |
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[/\\\\] # absolute start |
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| [a-z]:[/\\\\] # or Windows drive path |
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| [a-z][a-z0-9\.+-]+:// # or URI scheme:// - see http://tools.ietf.org/html/rfc3986#section-3.1 |
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)@ix'; |
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return preg_match($pattern, $path) === 1; |
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} |
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private static function extractScheme(&$parts) { |
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if (!count($parts)) { |
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return ''; |
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} |
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$first = reset($parts); |
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if (preg_match('/^([a-z]+:\\/\\/)(.*)$/', $first, $matches)) { |
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array_shift($parts); |
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if ($matches[2] !== '') { |
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array_unshift($parts, $matches[2]); |
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} |
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return $matches[1]; |
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} |
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return ''; |
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} |
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} |
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nochso /
omni
