92 lines
2.5 KiB
PHP
92 lines
2.5 KiB
PHP
<?php
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// initialize modules:
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function module_init() {
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module_list();
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}
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// apply function $function to every known module:
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function module_iterate($function, $argument = "") {
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foreach (module_list() as $name) $function($name, $argument);
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}
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// invoke hook $hook of module $name with optional arguments:
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function module_invoke($name, $hook, $a1 = NULL, $a2 = NULL) {
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$function = $name ."_". $hook;
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if (function_exists($function)) {
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return $function($a1, $a2);
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}
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}
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// return array of module names (includes lazy module loading):
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function module_list() {
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static $list;
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if (!$list) {
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$handle = opendir("modules");
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$list = array();
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while ($file = readdir($handle)) {
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if (".module" == substr($file, -7)) {
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$filename = substr($file, 0, -7);
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include "modules/$filename.module";
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$list[$filename] = $filename;
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}
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}
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closedir($handle);
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asort($list);
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}
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return $list;
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}
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// return 1 if module $name exists, 0 otherwise:
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function module_exist($name) {
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$list = module_list();
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return ($list[$name]) ? 1 : 0;
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}
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// return 1 if module $name implements hook $hook, 0 otherwise:
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function module_hook($name, $hook) {
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return function_exists($name ."_". $hook);
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}
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// rehash module-exported blocks:
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function module_rehash_blocks($name) {
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db_query("UPDATE blocks SET remove = '1' WHERE module = '$name'");
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if ($blocks = module_invoke($name, "block")) {
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foreach ($blocks as $offset=>$block) {
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foreach ($block as $item=>$data) {
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$block[$item] = addslashes($data);
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}
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if (!db_fetch_object(db_query("SELECT * FROM blocks WHERE module = '$name' AND name = '$block[info]'"))) {
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db_query("INSERT INTO blocks (name, module, delta) VALUES ('$block[info]', '$name', '$offset')");
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}
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else {
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db_query("UPDATE blocks SET delta = '$offset', remove = '0' WHERE module = '$name' AND name = '$block[info]'");
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}
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}
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}
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db_query("DELETE FROM blocks WHERE module = '$name' AND remove = '1'");
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}
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// rehash a module:
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function module_rehash($name) {
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if (module_exist($name)) {
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$result = db_query("SELECT * FROM modules WHERE name = '$name'");
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if (!$object = db_fetch_object($result)) {
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db_query("INSERT INTO modules (name) VALUES ('$name')");
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}
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// rehash module-exported blocks (if necessary):
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module_rehash_blocks($name);
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}
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else {
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// remove all reference to module:
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db_query("DELETE FROM modules WHERE name = '$name'");
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db_query("DELETE FROM blocks WHERE module = '$name'");
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}
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}
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?>
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