function cache_instructions($pi, $params = array())
{
global $Config;
global $DBInfo;
$pagename = $this->name;
// update aliases
if (!empty($Config['use_alias'])) {
$ac = new Cache_text('alias');
// is it removed ?
if ($ac->exists($pagename) and empty($pi['#alias']) and empty($pi['#title'])) {
// remove aliases
store_aliases($pagename, array());
} else {
if (!$ac->exists($pagename) or $ac->mtime($pagename) < $this->mtime() or !empty($_GET['update_alias'])) {
$as = array();
// parse #alias
if (!empty($pi['#alias'])) {
$as = get_csv($pi['#alias']);
}
// add #title as a alias
if (!empty($pi['#title'])) {
$as[] = $pi['#title'];
}
// update aliases
store_aliases($pagename, $as);
}
}
}
// update redirects cache
$redirect = isset($pi['#redirect'][0]) ? $pi['#redirect'] : null;
update_redirects($pagename, $redirect, $params['refresh']);
if (!empty($Config['use_keywords']) or !empty($Config['use_tagging']) or !empty($_GET['update_keywords'])) {
$tcache = new Cache_text('keyword');
$cache = new Cache_text('keywords');
$cur = $tcache->fetch($pagename);
if (empty($cur)) {
$cur = array();
}
$keys = array();
if (empty($pi['#keywords'])) {
$tcache->remove($pagename);
} else {
$keys = explode(',', $pi['#keywords']);
$keys = array_map('trim', $keys);
if (!$tcache->exists($pagename) or $tcache->mtime($pagename) < $this->mtime() or !empty($_GET['update_keywords'])) {
$tcache->update($pagename, $keys);
}
}
$adds = array_diff($keys, $cur);
$dels = array_diff($cur, $keys);
// merge new keywords
foreach ($adds as $a) {
if (!isset($a[0])) {
continue;
}
$l = $cache->fetch($a);
if (!is_array($l)) {
$l = array();
}
$l = array_merge($l, array($pagename));
$cache->update($a, $l);
}
// remove deleted keywords
foreach ($dels as $d) {
if (!isset($d[0])) {
continue;
}
$l = $cache->fetch($d);
if (!is_array($l)) {
$l = array();
}
$l = array_diff($l, array($pagename));
$cache->update($d, $l);
}
}
if (!empty($pi['#title']) and !empty($Config['use_titlecache'])) {
$tc = new Cache_text('title');
$old = $tc->fetch($pagename);
if (!isset($pi['#title'])) {
$tc->remove($pagename);
} else {
if ($old != $pi['#title'] or !$tcache->exists($pagename) or !empty($_GET['update_title'])) {
$tc->update($pagename, $pi['#title']);
}
}
}
return;
}
function cache_instructions($pi, $params = array())
{
global $Config;
global $DBInfo;
$pagename = $this->name;
// update aliases
if (!empty($Config['use_alias'])) {
$ac = new Cache_text('alias');
// is it removed ?
if ($ac->exists($pagename) and empty($pi['#alias']) and empty($pi['#title'])) {
// remove aliases
store_aliases($pagename, array());
} else {
if (!$ac->exists($pagename) or $ac->mtime($pagename) < $this->mtime() or !empty($_GET['update_alias'])) {
$as = array();
// parse #alias
if (!empty($pi['#alias'])) {
$as = get_csv($pi['#alias']);
}
// add #title as a alias
if (!empty($pi['#title'])) {
$as[] = $pi['#title'];
}
// update aliases
store_aliases($pagename, $as);
}
}
}
// update #redirect
$rc = new Cache_Text('redirect');
$old = $rc->fetch($pagename);
if ($old or isset($pi['#redirect'][0])) {
// update invert redirect index
$rc2 = new Cache_Text('redirects');
if (!empty($params['refresh']) or $old != $pi['#redirect']) {
// update direct cache
$rc->update($pagename, $pi['#redirect']);
$nr = $pi['#redirect'];
if (($p = strpos($nr, '#')) > 0) {
// get pagename only
//$anchor = substr($nr, $p);
$nr = substr($nr, 0, $p);
}
if (!isset($nr[0])) {
$rc->remove($pagename);
} else {
if (!preg_match('@^https?://@', $nr)) {
// not a URL redirect
// add redirect links
$redirects = $rc2->fetch($nr);
if (empty($redirects)) {
$redirects = array();
}
$redirects = array_merge($redirects, array($pagename));
$rc2->update($nr, $redirects);
}
}
while ($old != '' and $old != false) {
// get pagename only
if (($p = strpos($old, '#')) > 0) {
//$anchor = substr($old, $p);
$old = substr($old, 0, $p);
}
if ($nr == $old) {
break;
}
// check A#s-1 ~ A#s-2 redirects
// delete redirect links
$l = $rc2->fetch($old);
if ($l !== false and is_array($l)) {
$redirects = array_diff($l, array($pagename));
if (empty($redirects)) {
$rc2->remove($old);
} else {
$rc2->update($old, $redirects);
}
}
break;
}
}
}
if (!empty($Config['use_keywords']) or !empty($Config['use_tagging']) or !empty($_GET['update_keywords'])) {
$tcache = new Cache_text('keyword');
$cache = new Cache_text('keywords');
$cur = $tcache->fetch($pagename);
if (empty($cur)) {
$cur = array();
}
$keys = array();
if (empty($pi['#keywords'])) {
$tcache->remove($pagename);
} else {
$keys = explode(',', $pi['#keywords']);
$keys = array_map('trim', $keys);
if (!$tcache->exists($pagename) or $tcache->mtime($pagename) < $this->mtime() or !empty($_GET['update_keywords'])) {
$tcache->update($pagename, $keys);
}
}
$adds = array_diff($keys, $cur);
$dels = array_diff($cur, $keys);
// merge new keywords
foreach ($adds as $a) {
if (!isset($a[0])) {
continue;
}
$l = $cache->fetch($a);
if (!is_array($l)) {
$l = array();
}
$l = array_merge($l, array($pagename));
$cache->update($a, $l);
}
// remove deleted keywords
foreach ($dels as $d) {
if (!isset($d[0])) {
continue;
}
$l = $cache->fetch($d);
if (!is_array($l)) {
$l = array();
}
$l = array_diff($l, array($pagename));
$cache->update($d, $l);
}
}
if (!empty($pi['#title']) and !empty($Config['use_titlecache'])) {
$tc = new Cache_text('title');
$old = $tc->fetch($pagename);
if (!isset($pi['#title'])) {
$tc->remove($pagename);
} else {
if ($old != $pi['#title'] or !$tcache->exists($pagename) or !empty($_GET['update_title'])) {
$tc->update($pagename, $pi['#title']);
}
}
}
return;
}
