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AqueductExtension
aqueduct/arc/ARC2_Class.php
stuckman a6471aa0d3 Aqueduct 1.2 release for repo upload
2011-06-13 19:42:11 -04:00

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<?php
/**
* ARC2 base class
*
* @author Benjamin Nowack
* @license <http://arc.semsol.org/license>
* @homepage <http://arc.semsol.org/>
* @package ARC2
* @version 2009-12-08
*/
class ARC2_Class {
/* */
function __construct($a = '', &$caller) {
$a = is_array($a) ? $a : array();
$this->a = $a;
$this->caller = &$caller;
$this->__init();
}
function ARC2_Class($a = '', &$caller) {
$this->__construct($a, $caller);
}
function __destruct() {
//echo "\ndestructing " . get_class($this);
}
function __init() {/* base, time_limit */
if (!$_POST && isset($GLOBALS['HTTP_RAW_POST_DATA'])) parse_str($GLOBALS['HTTP_RAW_POST_DATA'], $_POST); /* php5 bug */
$this->inc_path = ARC2::getIncPath();
$this->ns_count = 0;
$this->nsp = array('http://www.w3.org/1999/02/22-rdf-syntax-ns#' => 'rdf');
$this->used_ns = array('http://www.w3.org/1999/02/22-rdf-syntax-ns#');
$this->ns = $this->v('ns', array(), $this->a);
$this->base = $this->v('base', ARC2::getRequestURI(), $this->a);
$this->errors = array();
$this->warnings = array();
$this->adjust_utf8 = $this->v('adjust_utf8', 0, $this->a);
$this->max_errors = $this->v('max_errors', 25, $this->a);
}
/* */
function v($name, $default = false, $o = false) {/* value if set */
if ($o === false) $o =& $this;
if (is_array($o)) {
return isset($o[$name]) ? $o[$name] : $default;
}
return isset($o->$name) ? $o->$name : $default;
}
function v1($name, $default = false, $o = false) {/* value if 1 (= not empty) */
if ($o === false) $o =& $this;
if (is_array($o)) {
return (isset($o[$name]) && $o[$name]) ? $o[$name] : $default;
}
return (isset($o->$name) && $o->$name) ? $o->$name : $default;
}
function m($name, $a = false, $default = false, $o = false) {/* call method */
if ($o === false) $o =& $this;
return method_exists($o, $name) ? $o->$name($a) : $default;
}
/* */
function camelCase($v, $lc_first = 0) {
$r = ucfirst($v);
while (preg_match('/^(.*)[\-\_ ](.*)$/', $r, $m)) {
$r = $m[1] . ucfirst($m[2]);
}
return $lc_first ? strtolower(substr($r, 0, 1)) . substr($r, 1) : $r;
}
/* */
function addError($v) {
if (!in_array($v, $this->errors)) {
$this->errors[] = $v;
}
if ($this->caller && method_exists($this->caller, 'addError')) {
$glue = strpos($v, ' in ') ? ' via ' : ' in ';
$this->caller->addError($v . $glue . get_class($this));
}
if (count($this->errors) > $this->max_errors) {
die('Too many errors (limit: ' . $this->max_errors . '): ' . print_r($this->errors, 1));
}
return false;
}
function getErrors() {
return $this->errors;
}
function getWarnings() {
return $this->warnings;
}
function resetErrors() {
$this->errors = array();
if ($this->caller && method_exists($this->caller, 'resetErrors')) {
$this->caller->resetErrors();
}
}
/* */
function splitURI($v) {
return ARC2::splitURI($v);
}
/* */
function getPName($v, $connector = ':') {
/* is already a pname */
if ($ns = $this->getPNameNamespace($v)) {
if (!in_array($ns, $this->used_ns)) $this->used_ns[] = $ns;
return $v;
}
/* new pname */
if ($parts = $this->splitURI($v)) {
/* known prefix */
foreach ($this->ns as $prefix => $ns) {
if ($parts[0] == $ns) {
if (!in_array($ns, $this->used_ns)) $this->used_ns[] = $ns;
return $prefix . $connector . $parts[1];
}
}
/* new prefix */
$prefix = $this->getPrefix($parts[0]);
return $prefix . $connector . $parts[1];
}
return $v;
}
function getPNameNamespace($v) {
if (!preg_match('/^([a-z0-9\_\-]+)\:([a-z0-9\_\-\.\%]*)$/i', $v, $m)) return 0;
if (!isset($this->ns[$m[1]])) return 0;
return $this->ns[$m[1]];
}
function getPrefix($ns) {
if (!isset($this->nsp[$ns])) {
$this->ns['ns' . $this->ns_count] = $ns;
$this->nsp[$ns] = 'ns' . $this->ns_count;
$this->ns_count++;
}
if (!in_array($ns, $this->used_ns)) $this->used_ns[] = $ns;
return $this->nsp[$ns];
}
function expandPName($v, $connector = ':') {
$re = '/^([a-z0-9\_\-]+)\:([a-z0-9\_\-]+)$/i';
if ($connector == '-') {
$re = '/^([a-z0-9\_]+)\-([a-z0-9\_\-]+)$/i';
}
if (preg_match($re, $v, $m) && isset($this->ns[$m[1]])) {
return $this->ns[$m[1]] . $m[2];
}
return $v;
}
function expandPNames($index) {
$r = array();
foreach ($index as $s => $ps) {
$s = $this->expandPName($s);
$r[$s] = array();
foreach ($ps as $p => $os) {
$p = $this->expandPName($p);
if (!is_array($os)) $os = array($os);
foreach ($os as $i => $o) {
if (!is_array($o)) {
$o_val = $this->expandPName($o);
$o_type = preg_match('/^[a-z]+\:[^\s]+$/si', $o_val) ? 'uri' : 'literal';
$o = array('value' => $o_val, 'type' => $o_type);
}
$os[$i] = $o;
}
$r[$s][$p] = $os;
}
}
return $r;
}
/* */
function calcURI($path, $base = "") {
/* quick check */
if (preg_match("/^[a-z0-9\_]+\:/i", $path)) {/* abs path or bnode */
return $path;
}
if (preg_match('/^\$\{.*\}/', $path)) {/* placeholder, assume abs URI */
return $path;
}
if (preg_match("/^\/\//", $path)) {/* net path, assume http */
return 'http:' . $path;
}
/* other URIs */
$base = $base ? $base : $this->base;
$base = preg_replace('/\#.*$/', '', $base);
if ($path === true) {/* empty (but valid) URIref via turtle parser: <> */
return $base;
}
$path = preg_replace("/^\.\//", '', $path);
$root = preg_match('/(^[a-z0-9]+\:[\/]{1,3}[^\/]+)[\/|$]/i', $base, $m) ? $m[1] : $base; /* w/o trailing slash */
$base .= ($base == $root) ? '/' : '';
if (preg_match('/^\//', $path)) {/* leading slash */
return $root . $path;
}
if (!$path) {
return $base;
}
if (preg_match('/^([\#\?])/', $path, $m)) {
return preg_replace('/\\' .$m[1]. '.*$/', '', $base) . $path;
}
if (preg_match('/^(\&)(.*)$/', $path, $m)) {/* not perfect yet */
return preg_match('/\?/', $base) ? $base . $m[1] . $m[2] : $base . '?' . $m[2];
}
if (preg_match("/^[a-z0-9]+\:/i", $path)) {/* abs path */
return $path;
}
/* rel path: remove stuff after last slash */
$base = substr($base, 0, strrpos($base, '/')+1);
/* resolve ../ */
while (preg_match('/^(\.\.\/)(.*)$/', $path, $m)) {
$path = $m[2];
$base = ($base == $root.'/') ? $base : preg_replace('/^(.*\/)[^\/]+\/$/', '\\1', $base);
}
return $base . $path;
}
/* */
function calcBase($path) {
$r = $path;
$r = preg_replace('/\#.*$/', '', $r);/* remove hash */
$r = preg_replace('/^\/\//', 'http://', $r);/* net path (//), assume http */
if (preg_match('/^[a-z0-9]+\:/', $r)) {/* scheme, abs path */
while (preg_match('/^(.+\/)(\.\.\/.*)$/U', $r, $m)) {
$r = $this->calcURI($m[1], $m[2]);
}
return $r;
}
return 'file://' . realpath($r);/* real path */
}
/* */
function getResource($uri, $store_or_props = '') {
$res = ARC2::getResource($this->a);
$res->setURI($uri);
if (is_array($store_or_props)) {
$res->setProps($store_or_props);
}
else {
$res->setStore($store_or_props);
}
return $res;
}
function toIndex($v) {
if (is_array($v)) {
if (isset($v[0]) && isset($v[0]['s'])) return ARC2::getSimpleIndex($v, 0);
return $v;
}
$parser = ARC2::getRDFParser($this->a);
if ($v && !preg_match('/\s/', $v)) {/* assume graph URI */
$parser->parse($v);
}
else {
$parser->parse('', $v);
}
return $parser->getSimpleIndex(0);
}
function toTriples($v) {
if (is_array($v)) {
if (isset($v[0]) && isset($v[0]['s'])) return $v;
return ARC2::getTriplesFromIndex($v);
}
$parser = ARC2::getRDFParser($this->a);
if ($v && !preg_match('/\s/', $v)) {/* assume graph URI */
$parser->parse($v);
}
else {
$parser->parse('', $v);
}
return $parser->getTriples();
}
/* */
function toNTriples($v, $ns = '', $raw = 0) {
ARC2::inc('NTriplesSerializer');
if (!$ns) $ns = isset($this->a['ns']) ? $this->a['ns'] : array();
$ser = new ARC2_NTriplesSerializer(array_merge($this->a, array('ns' => $ns)), $this);
return (isset($v[0]) && isset($v[0]['s'])) ? $ser->getSerializedTriples($v, $raw) : $ser->getSerializedIndex($v, $raw);
}
function toTurtle($v, $ns = '', $raw = 0) {
ARC2::inc('TurtleSerializer');
if (!$ns) $ns = isset($this->a['ns']) ? $this->a['ns'] : array();
$ser = new ARC2_TurtleSerializer(array_merge($this->a, array('ns' => $ns)), $this);
return (isset($v[0]) && isset($v[0]['s'])) ? $ser->getSerializedTriples($v, $raw) : $ser->getSerializedIndex($v, $raw);
}
function toRDFXML($v, $ns = '', $raw = 0) {
ARC2::inc('RDFXMLSerializer');
if (!$ns) $ns = isset($this->a['ns']) ? $this->a['ns'] : array();
$ser = new ARC2_RDFXMLSerializer(array_merge($this->a, array('ns' => $ns)), $this);
return (isset($v[0]) && isset($v[0]['s'])) ? $ser->getSerializedTriples($v, $raw) : $ser->getSerializedIndex($v, $raw);
}
function toRDFJSON($v, $ns = '') {
ARC2::inc('RDFJSONSerializer');
if (!$ns) $ns = isset($this->a['ns']) ? $this->a['ns'] : array();
$ser = new ARC2_RDFJSONSerializer(array_merge($this->a, array('ns' => $ns)), $this);
return (isset($v[0]) && isset($v[0]['s'])) ? $ser->getSerializedTriples($v) : $ser->getSerializedIndex($v);
}
function toRSS10($v, $ns = '') {
ARC2::inc('RSS10Serializer');
if (!$ns) $ns = isset($this->a['ns']) ? $this->a['ns'] : array();
$ser = new ARC2_RSS10Serializer(array_merge($this->a, array('ns' => $ns)), $this);
return (isset($v[0]) && isset($v[0]['s'])) ? $ser->getSerializedTriples($v) : $ser->getSerializedIndex($v);
}
function toLegacyXML($v, $ns = '') {
ARC2::inc('LegacyXMLSerializer');
if (!$ns) $ns = isset($this->a['ns']) ? $this->a['ns'] : array();
$ser = new ARC2_LegacyXMLSerializer(array_merge($this->a, array('ns' => $ns)), $this);
return $ser->getSerializedArray($v);
}
function toLegacyJSON($v, $ns = '') {
ARC2::inc('LegacyJSONSerializer');
if (!$ns) $ns = isset($this->a['ns']) ? $this->a['ns'] : array();
$ser = new ARC2_LegacyJSONSerializer(array_merge($this->a, array('ns' => $ns)), $this);
return $ser->getSerializedArray($v);
}
function toLegacyHTML($v, $ns = '') {
ARC2::inc('LegacyHTMLSerializer');
if (!$ns) $ns = isset($this->a['ns']) ? $this->a['ns'] : array();
$ser = new ARC2_LegacyHTMLSerializer(array_merge($this->a, array('ns' => $ns)), $this);
return $ser->getSerializedArray($v);
}
function toHTML($v, $ns = '') {
ARC2::inc('POSHRDFSerializer');
if (!$ns) $ns = isset($this->a['ns']) ? $this->a['ns'] : array();
$ser = new ARC2_POSHRDFSerializer(array_merge($this->a, array('ns' => $ns)), $this);
return (isset($v[0]) && isset($v[0]['s'])) ? $ser->getSerializedTriples($v) : $ser->getSerializedIndex($v);
}
/* */
function getFilledTemplate($t, $vals, $g = '') {
$parser = ARC2::getTurtleParser();
$parser->parse($g, $this->getTurtleHead() . $t);
return $parser->getSimpleIndex(0, $vals);
}
function getTurtleHead() {
$r = '';
$ns = $this->v('ns', array(), $this->a);
foreach ($ns as $k => $v) {
$r .= "@prefix " . $k . ": <" .$v. "> .\n";
}
return $r;
}
function completeQuery($q, $ns = '') {
if (!$ns) $ns = isset($this->a['ns']) ? $this->a['ns'] : array();
$added_prefixes = array();
$prologue = '';
foreach ($ns as $k => $v) {
$k = rtrim($k, ':');
if (in_array($k, $added_prefixes)) continue;
if (preg_match('/(^|\s)' . $k . ':/s', $q) && !preg_match('/PREFIX\s+' . $k . '\:/is', $q)) {
$prologue .= "\n" . 'PREFIX ' . $k . ': <' . $v . '>';
}
$added_prefixes[] = $k;
}
return $prologue . "\n" . $q;
}
/* */
function toUTF8($str) {
return $this->adjust_utf8 ? ARC2::toUTF8($str) : $str;
}
function toDataURI($str) {
return 'data:text/plain;charset=utf-8,' . rawurlencode($str);
}
function fromDataURI($str) {
return str_replace('data:text/plain;charset=utf-8,', '', rawurldecode($str));
}
/* prevent SQL injections via SPARQL REGEX */
function checkRegex($str) {
return addslashes($str); // @@todo extend
}
/* */
}
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