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<?php /** * modified PHP implementation of Matthias Mullie's convert path class * Convert paths relative from 1 file to another. * * E.g. * ../../images/icon.jpg relative to /css/imports/icons.css * becomes * ../images/icon.jpg relative to /css/minified.css * * @author Matthias Mullie <[email protected]> * @copyright Copyright (c) 2015, Matthias Mullie. All rights reserved * @license MIT License */ namespace LiteSpeed\Lib\CSS_JS_MIN\PathConverter; defined( 'WPINC' ) || exit; interface ConverterInterface { /** * Convert file paths. * * @param string $path The path to be converted * * @return string The new path */ public function convert( $path ); } class Converter implements ConverterInterface { /** * @var string */ protected $from; /** * @var string */ protected $to; /** * @param string $from The original base path (directory, not file!) * @param string $to The new base path (directory, not file!) * @param string $root Root directory (defaults to `getcwd`) */ public function __construct( $from, $to, $root = '' ) { $shared = $this->shared( $from, $to ); if ( $shared === '' ) { // when both paths have nothing in common, one of them is probably // absolute while the other is relative $root = $root ?: getcwd(); $from = strpos( $from, $root ) === 0 ? $from : preg_replace( '/\/+/', '/', $root . '/' . $from ); $to = strpos( $to, $root ) === 0 ? $to : preg_replace( '/\/+/', '/', $root . '/' . $to ); // or traveling the tree via `..` // attempt to resolve path, or assume it's fine if it doesn't exist $from = @realpath( $from ) ?: $from; $to = @realpath( $to ) ?: $to; } $from = $this->dirname( $from ); $to = $this->dirname( $to ); $from = $this->normalize( $from ); $to = $this->normalize( $to ); $this->from = $from; $this->to = $to; } /** * Normalize path. * * @param string $path * * @return string */ protected function normalize( $path ) { // deal with different operating systems' directory structure $path = rtrim( str_replace( DIRECTORY_SEPARATOR, '/', $path ), '/' ); // remove leading current directory. if ( substr( $path, 0, 2 ) === './' ) { $path = substr( $path, 2 ); } // remove references to current directory in the path. $path = str_replace( '/./', '/', $path ); /* * Example: * /home/forkcms/frontend/cache/compiled_templates/../../core/layout/css/../images/img.gif * to * /home/forkcms/frontend/core/layout/images/img.gif */ do { $path = preg_replace( '/[^\/]+(?<!\.\.)\/\.\.\//', '', $path, -1, $count ); } while ( $count ); return $path; } /** * Figure out the shared path of 2 locations. * * Example: * /home/forkcms/frontend/core/layout/images/img.gif * and * /home/forkcms/frontend/cache/minified_css * share * /home/forkcms/frontend * * @param string $path1 * @param string $path2 * * @return string */ protected function shared( $path1, $path2 ) { // $path could theoretically be empty (e.g. no path is given), in which // case it shouldn't expand to array(''), which would compare to one's // root / $path1 = $path1 ? explode( '/', $path1 ) : array(); $path2 = $path2 ? explode( '/', $path2 ) : array(); $shared = array(); // compare paths & strip identical ancestors foreach ( $path1 as $i => $chunk ) { if ( isset( $path2[ $i ] ) && $path1[ $i ] == $path2[ $i ] ) { $shared[] = $chunk; } else { break; } } return implode( '/', $shared ); } /** * Convert paths relative from 1 file to another. * * E.g. * ../images/img.gif relative to /home/forkcms/frontend/core/layout/css * should become: * ../../core/layout/images/img.gif relative to * /home/forkcms/frontend/cache/minified_css * * @param string $path The relative path that needs to be converted * * @return string The new relative path */ public function convert( $path ) { // quit early if conversion makes no sense if ( $this->from === $this->to ) { return $path; } $path = $this->normalize( $path ); // if we're not dealing with a relative path, just return absolute if ( strpos( $path, '/' ) === 0 ) { return $path; } // normalize paths $path = $this->normalize( $this->from . '/' . $path ); // strip shared ancestor paths $shared = $this->shared( $path, $this->to ); $path = mb_substr( $path, mb_strlen( $shared ) ); $to = mb_substr( $this->to, mb_strlen( $shared ) ); // add .. for every directory that needs to be traversed to new path $to = str_repeat( '../', count( array_filter( explode( '/', $to ) ) ) ); return $to . ltrim( $path, '/' ); } /** * Attempt to get the directory name from a path. * * @param string $path * * @return string */ protected function dirname( $path ) { if ( @is_file( $path ) ) { return dirname( $path ); } if ( @is_dir( $path ) ) { return rtrim( $path, '/' ); } // no known file/dir, start making assumptions // ends in / = dir if ( mb_substr( $path, -1 ) === '/' ) { return rtrim( $path, '/' ); } // has a dot in the name, likely a file if ( preg_match( '/.*\..*$/', basename( $path ) ) !== 0 ) { return dirname( $path ); } // you're on your own here! return $path; } } class NoConverter implements ConverterInterface { /** * {@inheritdoc} */ public function convert( $path ) { return $path; } }