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PhabricatorSlug.php
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Created
Fri, Aug 16, 07:19

PhabricatorSlug.php
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<?php
final class PhabricatorSlug extends Phobject {
public static function normalizeProjectSlug($slug) {
$slug = str_replace('/', ' ', $slug);
$slug = self::normalize($slug, $hashtag = true);
return rtrim($slug, '/');
}
public static function isValidProjectSlug($slug) {
$slug = self::normalizeProjectSlug($slug);
return ($slug != '_');
}
public static function normalize($slug, $hashtag = false) {
$slug = preg_replace('@/+@', '/', $slug);
$slug = trim($slug, '/');
$slug = phutil_utf8_strtolower($slug);
$ban =
// Ban control characters since users can't type them and they create
// various other problems with parsing and rendering.
"\\x00-\\x19".
// Ban characters with special meanings in URIs (and spaces), since we
// want slugs to produce nice URIs.
"#%&+=?".
" ".
// Ban backslashes and various brackets for parsing and URI quality.
"\\\\".
"<>{}\\[\\]".
// Ban single and double quotes since they can mess up URIs.
"'".
'"';
// In hashtag mode (used for Project hashtags), ban additional characters
// which cause parsing problems.
if ($hashtag) {
$ban .= '`~!@$^*,:;(|)';
}
$slug = preg_replace('(['.$ban.']+)', '_', $slug);
$slug = preg_replace('@_+@', '_', $slug);
$parts = explode('/', $slug);
// Remove leading and trailing underscores from each component, if the
// component has not been reduced to a single underscore. For example, "a?"
// converts to "a", but "??" converts to "_".
foreach ($parts as $key => $part) {
if ($part != '_') {
$parts[$key] = trim($part, '_');
}
}
$slug = implode('/', $parts);
// Specifically rewrite these slugs. It's OK to have a slug like "a..b",
// but not a slug which is only "..".
// NOTE: These are explicitly not pht()'d, because they should be stable
// across languages.
$replace = array(
'.' => 'dot',
'..' => 'dotdot',
);
foreach ($replace as $pattern => $replacement) {
$pattern = preg_quote($pattern, '@');
$slug = preg_replace(
'@(^|/)'.$pattern.'(\z|/)@',
'\1'.$replacement.'\2', $slug);
}
return $slug.'/';
}
public static function getDefaultTitle($slug) {
$parts = explode('/', trim($slug, '/'));
$default_title = end($parts);
$default_title = str_replace('_', ' ', $default_title);
$default_title = phutil_utf8_ucwords($default_title);
$default_title = nonempty($default_title, pht('Untitled Document'));
return $default_title;
}
public static function getAncestry($slug) {
$slug = self::normalize($slug);
if ($slug == '/') {
return array();
}
$ancestors = array(
'/',
);
$slug = explode('/', $slug);
array_pop($slug);
array_pop($slug);
$accumulate = '';
foreach ($slug as $part) {
$accumulate .= $part.'/';
$ancestors[] = $accumulate;
}
return $ancestors;
}
public static function getDepth($slug) {
$slug = self::normalize($slug);
if ($slug == '/') {
return 0;
} else {
return substr_count($slug, '/');
}
}
}

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