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<?php |
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namespace sweetrdf\InMemoryStoreSqlite; |
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function calcURI(string $path, ?string $base = null): string |
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{ |
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/* quick check */ |
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if (preg_match("/^[a-z0-9\_]+\:/i", $path)) {/* abs path or bnode */ |
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return $path; |
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} |
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if (preg_match('/^\$\{.*\}/', $path)) {/* placeholder, assume abs URI */ |
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return $path; |
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} |
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if (preg_match("/^\/\//", $path)) {/* net path, assume http */ |
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return 'http:'.$path; |
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} |
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/* other URIs */ |
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$base = $base ?: NamespaceHelper::BASE_NAMESPACE; |
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$base = preg_replace('/\#.*$/', '', $base); |
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if (true === $path) {/* empty (but valid) URIref via turtle parser: <> */ |
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return $base; |
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} |
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$path = preg_replace("/^\.\//", '', $path); |
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$root = preg_match('/(^[a-z0-9]+\:[\/]{1,3}[^\/]+)[\/|$]/i', $base, $m) ? $m[1] : $base; /* w/o trailing slash */ |
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$base .= ($base == $root) ? '/' : ''; |
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if (preg_match('/^\//', $path)) {/* leading slash */ |
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return $root.$path; |
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} |
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if (!$path) { |
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return $base; |
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} |
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if (preg_match('/^([\#\?])/', $path, $m)) { |
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return preg_replace('/\\'.$m[1].'.*$/', '', $base).$path; |
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} |
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if (preg_match('/^(\&)(.*)$/', $path, $m)) {/* not perfect yet */ |
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return preg_match('/\?/', $base) ? $base.$m[1].$m[2] : $base.'?'.$m[2]; |
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} |
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if (preg_match("/^[a-z0-9]+\:/i", $path)) {/* abs path */ |
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return $path; |
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} |
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/* rel path: remove stuff after last slash */ |
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$base = substr($base, 0, strrpos($base, '/') + 1); |
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/* resolve ../ */ |
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while (preg_match('/^(\.\.\/)(.*)$/', $path, $m)) { |
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$path = $m[2]; |
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$base = ($base == $root.'/') ? $base : preg_replace('/^(.*\/)[^\/]+\/$/', '\\1', $base); |
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} |
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return $base.$path; |
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} |
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function calcBase(string $path): string |
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{ |
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$r = $path; |
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$r = preg_replace('/\#.*$/', '', $r); /* remove hash */ |
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$r = preg_replace('/^\/\//', 'http://', $r); /* net path (//), assume http */ |
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if (preg_match('/^[a-z0-9]+\:/', $r)) {/* scheme, abs path */ |
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while (preg_match('/^(.+\/)(\.\.\/.*)$/U', $r, $m)) { |
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$r = calcURI($m[1], $m[2]); |
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} |
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return $r; |
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} |
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return 'file://'.realpath($r); /* real path */ |
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} |
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/** |
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* Normalize value for ORDER BY operations. |
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*/ |
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function getNormalizedValue(string $val): string |
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{ |
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/* try date (e.g. 21 August 2007) */ |
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if ( |
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preg_match('/^[0-9]{1,2}\s+[a-z]+\s+[0-9]{4}/i', $val) |
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&& ($uts = strtotime($val)) |
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&& (-1 !== $uts) |
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) { |
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return (string) date("Y-m-d\TH:i:s", $uts); |
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} |
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/* xsd date (e.g. 2009-05-28T18:03:38+09:00 2009-05-28T18:03:38GMT) */ |
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if (true === (bool) strtotime($val)) { |
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return (string) date('Y-m-d\TH:i:s\Z', strtotime($val)); |
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} |
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if (is_numeric($val)) { |
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$val = sprintf('%f', $val); |
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if (preg_match("/([\-\+])([0-9]*)\.([0-9]*)/", $val, $m)) { |
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return $m[1].sprintf('%018s', $m[2]).'.'.sprintf('%-015s', $m[3]); |
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} |
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if (preg_match("/([0-9]*)\.([0-9]*)/", $val, $m)) { |
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return '+'.sprintf('%018s', $m[1]).'.'.sprintf('%-015s', $m[2]); |
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} |
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return $val; |
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} |
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/* any other string: remove tags, linebreaks etc., but keep MB-chars */ |
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// [\PL\s]+ ( = non-Letters) kills digits |
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$re = '/[\PL\s]+/isu'; |
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$re = '/[\s\'\"\´\`]+/is'; |
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$val = trim(preg_replace($re, '-', strip_tags($val))); |
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if (\strlen($val) > 35) { |
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$fnc = \function_exists('mb_substr') ? 'mb_substr' : 'substr'; |
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$val = $fnc($val, 0, 17).'-'.$fnc($val, -17); |
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} |
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return $val; |
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} |
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/** |
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* @return array<string,string> |
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*/ |
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function splitURI($v): array |
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{ |
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/* |
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* the following namespaces may lead to conflated URIs, |
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* we have to set the split position manually |
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*/ |
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if (strpos($v, 'www.w3.org')) { |
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/* |
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* @todo port to NamespaceHelper |
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*/ |
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$specials = [ |
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'http://www.w3.org/XML/1998/namespace', |
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'http://www.w3.org/2005/Atom', |
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'http://www.w3.org/1999/xhtml', |
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]; |
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foreach ($specials as $ns) { |
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if (str_contains($v, $ns)) { |
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$local_part = substr($v, \strlen($ns)); |
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if (!preg_match('/^[\/\#]/', $local_part)) { |
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return [$ns, $local_part]; |
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} |
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} |
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} |
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} |
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/* auto-splitting on / or # */ |
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//$re = '^(.*?)([A-Z_a-z][-A-Z_a-z0-9.]*)$'; |
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if (preg_match('/^(.*[\/\#])([^\/\#]+)$/', $v, $m)) { |
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return [$m[1], $m[2]]; |
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} |
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/* auto-splitting on last special char, e.g. urn:foo:bar */ |
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if (preg_match('/^(.*[\:\/])([^\:\/]+)$/', $v, $m)) { |
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return [$m[1], $m[2]]; |
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} |
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return [$v, '']; |
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} |
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sweetrdf /
in-memory-store-sqlite
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