/**
* Change the load order of a plugin
*
* @param string $pi_name Name of the plugin
* @param mixed $where Where to move the plugin specified by $pi_name.
* Valid values are "up" and "dn", which stand for
* "Move 'Up' or 'Down' through the load order"
* or any integer between 0 and 10000.
* @return void
*
*/
function change_load_order($pi_name = '', $where = '')
{
if (!empty($pi_name) && !empty($where)) {
global $_CONF, $_TABLES;
$q = "SELECT pi_load FROM {$_TABLES['plugins']} WHERE pi_name = '{$pi_name}'";
$q = DB_query($q);
if (DB_numRows($q) == 1) {
// if the plugin exists
$query = '';
switch ($where) {
case "up":
$A = DB_fetchArray($q);
if ($A['pi_load'] > 10) {
// no negative values
$query = "UPDATE {$_TABLES['plugins']} SET pi_load = pi_load-11 WHERE pi_name = '{$pi_name}'";
}
break;
case "dn":
$query = "UPDATE {$_TABLES['plugins']} SET pi_load = pi_load+11 WHERE pi_name = '{$pi_name}'";
break;
default:
if (is_numeric($where) && $where >= 0 && $where <= 10000) {
$where = (int) $where;
$query = "UPDATE {$_TABLES['plugins']} SET pi_load = {$where} WHERE pi_name = '{$pi_name}'";
} else {
COM_errorLog("plugins admin error: Attempt to assign an invalid load order '{$where}' to plugin '{$pi_name}'");
}
break;
}
if (!empty($query)) {
DB_query($query);
reorderplugins();
}
} else {
COM_errorLog("plugins admin error: Attempt to move a non existent plugin: {$pi_name}");
}
}
}
/**
* Disables all plugins with unresolved dependencies
* and resolves the load order for all enabled plugins.
*
* @return bool True or False, depending on whether it was
* necessary to alter the load order of a plugin
* @since Geeklog 1.8.0
*/
function PLG_resolveDependencies()
{
global $_PLUGINS, $_TABLES;
$retval = '';
$flag = true;
// false means that all dependencies are resolved
while ($flag) {
// loop until ALL dependencies are satisfied
$flag = false;
// set this if any plugin has been disabled during the loop
foreach ($_PLUGINS as $key => $pi_name) {
if (!PLG_checkDependencies($pi_name)) {
// plugin has unresolved dependencies
// disable plugin;
$flag = true;
// disabling a plugin can break the dependencies of a plugin that has already been checked, remember to loop again
PLG_enableStateChange($pi_name, false);
DB_change($_TABLES['plugins'], 'pi_enabled', 0, 'pi_name', $pi_name);
PLG_pluginStateChange($pi_name, 'disabled');
unset($_PLUGINS[$key]);
}
}
}
// automatically resolve load order for enabled plugins
$index = 2000;
// how far through the load order to push back plugins
$maxqueries = 50;
// just in case...
$globalflag = false;
// remember if we change the load order of any plugin
$flag = true;
// set true if we need another pass in the while loop
while ($flag && $maxqueries) {
// Now check if the load order is correct
$flag = false;
// get the load orders of all enabled plugins
$q = DB_query("SELECT pi_name, pi_load FROM {$_TABLES['plugins']} WHERE pi_enabled='1'");
$plo = array();
// Plugins Load Order
while ($a = DB_fetchArray($q)) {
$plo[] = $a;
}
$params = array();
foreach ($plo as $key => $value) {
// for each available plugin
$maxqueries--;
$params = PLG_getParams($value['pi_name']);
// get dependencies
if (isset($params['requires']) && is_array($params['requires'])) {
// if any
foreach ($params['requires'] as $rkey => $rvalue) {
// process each dependency
if (isset($rvalue['plugin'])) {
// get the load order of the required plugin
foreach ($plo as $new_key => $new_value) {
if ($new_value['pi_name'] == $rvalue['plugin']) {
$dep_load = $new_value['pi_load'];
break;
}
}
if ($dep_load > $value['pi_load']) {
// incorrect load order
// move down the order
DB_query("UPDATE {$_TABLES['plugins']} SET pi_load = '{$index}' WHERE pi_name = '{$value['pi_name']}'");
$index++;
$flag = true;
$globalflag = true;
}
}
}
}
}
}
reorderplugins();
if ($globalflag == false) {
return true;
// no change
} else {
return false;
// something changed
}
}
