function EasyRdf_ParsedUri::normalize

Normalizes the path of this URI if it has one. Normalizing a path means that any unnecessary '.' and '..' segments are removed. For example, the URI http://example.com/a/b/../c/./d would be normalized to http://example.com/a/c/d

Return value

object EasyRdf_ParsedUri

File

core/modules/rdf/tests/src/Traits/EasyRdf_ParsedUri.php, line 214

Class

EasyRdf_ParsedUri

A RFC3986 compliant URI parser

Namespace

Code

public function normalize() {
    if (empty($this->path)) {
        return $this;
    }
    // Remove ./ from the start
    if (substr($this->path, 0, 2) == './') {
        // Remove both characters
        $this->path = substr($this->path, 2);
    }
    // Remove /. from the end
    if (substr($this->path, -2) == '/.') {
        // Remove only the last dot, not the slash!
        $this->path = substr($this->path, 0, -1);
    }
    if (substr($this->path, -3) == '/..') {
        $this->path .= '/';
    }
    // Split the path into its segments
    $segments = explode('/', $this->path);
    $newSegments = array();
    // Remove all unnecessary '.' and '..' segments
    foreach ($segments as $segment) {
        if ($segment == '..') {
            // Remove the previous part of the path
            $count = count($newSegments);
            if ($count > 0 && $newSegments[$count - 1]) {
                array_pop($newSegments);
            }
        }
        elseif ($segment == '.') {
            // Ignore
            continue;
        }
        else {
            array_push($newSegments, $segment);
        }
    }
    // Construct the new normalized path
    $this->path = implode('/', $newSegments);
    // Allow easy chaining of methods
    return $this;
}