and Alc�?ve
* @package phpLDAPadmin
*/
/**
* Compares two arrays by numerically comparing their 'prority'
* value. Standard `cmp-like' function.
*
* @param a First element to compare.
* @param b Second element to compare.
*
* @return -1 if priority of first element is smaller than second
* element priority. 1 otherwise.
*/
function sort_array_by_priority($a,$b) {
return (($a['priority'] < $b['priority']) ? -1 : 1 );
}
/**
* Runs procedures attached to a hook.
*
* @param hook_name Name of hook to run.
* @param args Array of optional arguments set by phpldapadmin. It is normally in a form known by call_user_func_array() :
*
* [ 'server_id' => 0,
* 'dn' => 'uid=epoussa,ou=tech,o=corp,o=fr' ]
*
* @return true if all procedures returned true, false otherwise.
*/
function run_hook($hook_name,$args) {
$hooks = isset($_SESSION[APPCONFIG]) ? $_SESSION[APPCONFIG]->hooks : array();
if (! count($hooks) || ! array_key_exists($hook_name,$hooks)) {
return true;
}
$rollbacks = array();
reset($hooks[$hook_name]);
/* Execution of procedures attached is done using a numeric order
* since all procedures have been attached to the hook with a
* numerical weight. */
while (list($key,$hook) = each($hooks[$hook_name])) {
array_push($rollbacks,$hook['rollback_function']);
$result = call_user_func_array($hook['hook_function'],$args);
/* If a procedure fails (identified by a false return), its optional rollback is executed with
* the same arguments. After that, all rollbacks from
* previously executed procedures are executed in the reverse
* order. */
if (! is_null($result) && $result == false) {
while ($rollbacks) {
$rollback = array_pop($rollbacks);
if ($rollback != false) {
call_user_func_array($rollback,$args);
}
}
return false;
}
}
return true;
}
/**
* Adds a procedure to a hook for later execution.
*
* @param hook_name Name of the hook.
* @param hook_function Name of the php function called upon hook trigger.
* @param priority Numeric priority. Lowest means procedure will be executed before.
* @param rollback_function Name of the php rollback function called upon failure.
*/
function add_hook($hook_name,$hook_function,$priority=0,$rollback_function=null) {
# First, see if the hook function exists.
if (! function_exists($hook_function)) {
system_message(array(
'title'=>('Hook function does not exist'),
'body'=>sprintf('Hook name: %s
Hook function: %s',$hook_name,$hook_function),
'type'=>'warn'));
return;
}
if (! array_key_exists($hook_name,$_SESSION[APPCONFIG]->hooks))
$_SESSION[APPCONFIG]->hooks[$hook_name] = array();
remove_hook($hook_name,$hook_function,-1,null);
array_push($_SESSION[APPCONFIG]->hooks[$hook_name],array(
'priority' => $priority,
'hook_function' => $hook_function,
'rollback_function' => $rollback_function));
uasort($_SESSION[APPCONFIG]->hooks[$hook_name],'sort_array_by_priority');
}
/**
* Removes a procedure from a hook, based on a filter.
*
* @param hook_name Name of the hook.
* @param priority Numeric priority. If set, all procedures of that priority will be removed.
* @param hook_function Name of the procedure function. If set, all procedures that call this function will be removed.
* @param rollback_function Name of the php rollback function called upon failure. If set, all
* procedures that call this function as a rollback will be removed.
*/
function remove_hook($hook_name,$hook_function,$priority,$rollback_function) {
if (array_key_exists($hook_name,$_SESSION[APPCONFIG]->hooks)) {
reset($_SESSION[APPCONFIG]->hooks[$hook_name]);
while (list($key,$hook) = each($_SESSION[APPCONFIG]->hooks[$hook_name])) {
if (($priority >= 0 && $priority == $hook['priority']) ||
($hook_function && $hook_function == $hook['hook_function']) ||
($rollback_function && $rollback_function == $hook['rollback_function'])) {
unset($_SESSION[APPCONFIG]->hooks[$hook_name][$key]);
}
}
}
}
/**
* Removes all procedures from a hook.
*
* @param hook_name Name of hook to clear.
*/
function clear_hooks($hook_name) {
if (array_key_exists($hook_name,$_SESSION[APPCONFIG]->hooks))
unset($_SESSION[APPCONFIG]->hooks[$hook_name]);
}
$hooks = array();
# Evaluating user-made hooks
if (is_dir(HOOKSDIR.'functions')) {
$hooks['dir'] = dir(HOOKSDIR.'functions');
while ($hooks['file'] = $hooks['dir']->read()) {
$script = sprintf('%s/%s/%s',HOOKSDIR,'functions',$hooks['file']);
if (is_file($script) && preg_match('/php[0-9]?$/',$hooks['file']))
require_once $script;
}
$hooks['dir']->close();
}
?>