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<?php
// $Id$
// initialize modules:
function module_init() {
require_once("modules/user.module");
require_once("modules/drupal.module");
require_once("modules/system.module");
require_once("modules/watchdog.module");
module_list();
}
// 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 $name) {
if (module_hook($name, $hook)) {
if ($result = module_invoke($name, $hook, $a1, $a2, $a3, $a4)) {
$return = array_merge($return, $result);
}
}
}
return $return;
}
// return array of module names (includes lazy module loading):
function module_list() {
static $list;
if (!$list) {
$list = array("drupal" => "drupal", "system" => "system", "user" => "user", "watchdog" => "watchdog");
$result = db_query("SELECT name, filename FROM system WHERE type = 'module' AND status = '1' ORDER BY name");
while ($module = db_fetch_object($result)) {
$list[$module->name] = $module->name;
@include_once "modules/$module->filename";
}
asort($list);
}
return $list;
}
// return 1 if module $name exists, 0 otherwise:
function module_exist($name) {
$list = module_list();
return ($list[$name]) ? 1 : 0;
}
// return 1 if module $name implements hook $hook, 0 otherwise:
function module_hook($name, $hook) {
return function_exists($name ."_". $hook);
}
// rehash module-exported blocks:
function module_rehash_blocks($name) {
db_query("UPDATE blocks SET remove = '1' WHERE module = '$name'");
if ($blocks = module_invoke($name, "block")) {
foreach ($blocks as $delta => $block) {
foreach ($block as $item => $data) {
$block[$item] = addslashes($data);
}
if (!db_fetch_object(db_query("SELECT * FROM blocks WHERE module = '$name' AND name = '$block[info]'"))) {
db_query("INSERT INTO blocks (name, module, delta) VALUES ('$block[info]', '$name', '$delta')");
}
else {
db_query("UPDATE blocks SET delta = '$delta', remove = '0' WHERE module = '$name' AND name = '$block[info]'");
}
}
}
db_query("DELETE FROM blocks WHERE module = '$name' AND remove = '1'");
}
// rehash a module:
function module_rehash($name) {
if (module_exist($name)) {
$result = db_query("SELECT * FROM modules WHERE name = '$name'");
if (!$object = db_fetch_object($result)) {
db_query("INSERT INTO modules (name) VALUES ('$name')");
}
// rehash module-exported blocks (if necessary):
module_rehash_blocks($name);
}
else {
// remove all reference to module:
db_query("DELETE FROM modules WHERE name = '$name'");
db_query("DELETE FROM blocks WHERE module = '$name'");
}
}
?>
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