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<?php
// $Id$
// initialize modules:
function module_init() {
// Note: changing this also requires changing system_admin() @ modules/system.module.
require_once "modules/admin.module";
require_once "modules/user.module";
require_once "modules/system.module";
require_once "modules/watchdog.module";
module_list();
module_invoke_all("init");
}
// apply function $function to every known module:
function module_iterate($function, $argument = "") {
foreach (module_list() as $name) {
$function($name, $argument);
}
}
// invoke hook $hook of module $name with optional arguments:
function module_invoke($name, $hook, $a1 = NULL, $a2 = NULL, $a3 = NULL, $a4 = NULL) {
$function = $name ."_". $hook;
if (function_exists($function)) {
return $function($a1, $a2, $a3, $a4);
}
}
// invoke $hook for all appropriate modules:
function module_invoke_all($hook, $a1 = NULL, $a2 = NULL, $a3 = NULL, $a4 = NULL) {
$return = array();
foreach (module_list() as $name) {
$result = module_invoke($name, $hook, $a1, $a2, $a3, $a4);
if (isset($result)) {
$return = array_merge($return, $result);
}
}
return $return;
}
// return array of module names (includes lazy module loading if not in bootstrap mode)
function module_list($refresh = 0, $bootstrap = 0) {
static $list;
if ($refresh) {
unset($list);
}
if (!$list) {
$list = array("admin" => "admin", "system" => "system", "user" => "user", "watchdog" => "watchdog");
$result = db_query("SELECT name, filename, bootstrap FROM {system} WHERE type = 'module' AND status = '1' ORDER BY name");
while ($module = db_fetch_object($result)) {
if (file_exists($module->filename)) {
if ($bootstrap) {
$list[$module->name] = array("name"=> $module->name, "bootstrap" => $module->bootstrap, "filename" => $module->filename);
}
else {
$list[$module->name] = $module->name;
include_once $module->filename;
}
}
}
natcasesort($list);
}
return $list;
}
// return 1 if module $name exists, 0 otherwise:
function module_exist($name) {
$list = module_list();
return isset($list[$name]) ? 1 : 0;
}
// return 1 if module $name implements hook $hook, 0 otherwise:
function module_hook($name, $hook) {
return function_exists($name ."_". $hook);
}
?>
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