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<?php
namespace Zotlabs\Extend;
use App;
/**
* @brief Hook class.
*
*/
class Hook {
static public function register($hook,$file,$function,$version = 1,$priority = 0) {
if(is_array($function)) {
$function = serialize($function);
}
$r = q("SELECT * FROM hook WHERE hook = '%s' AND file = '%s' AND fn = '%s' and priority = %d and hook_version = %d LIMIT 1",
dbesc($hook),
dbesc($file),
dbesc($function),
intval($priority),
intval($version)
);
if($r)
return true;
// To aid in upgrade and transition, remove old settings for any registered hooks that match in all respects except
// for priority or hook_version
$r = q("DELETE FROM hook where hook = '%s' and file = '%s' and fn = '%s'",
dbesc($hook),
dbesc($file),
dbesc($function)
);
$r = q("INSERT INTO hook (hook, file, fn, priority, hook_version) VALUES ( '%s', '%s', '%s', %d, %d )",
dbesc($hook),
dbesc($file),
dbesc($function),
intval($priority),
intval($version)
);
self::insert($hook, $function, $version, $priority);
return $r;
}
static public function register_array($file,$arr) {
if($arr) {
foreach($arr as $k => $v) {
self::register($k,$file,$v);
}
}
}
static public function unregister($hook,$file,$function,$version = 1,$priority = 0) {
if(is_array($function)) {
$function = serialize($function);
}
$r = q("DELETE FROM hook WHERE hook = '%s' AND file = '%s' AND fn = '%s' and priority = %d and hook_version = %d",
dbesc($hook),
dbesc($file),
dbesc($function),
intval($priority),
intval($version)
);
return $r;
}
/**
* @brief Unregister all hooks with this file component.
*
* Useful for addon upgrades where you want to clean out old interfaces.
*
* @param string $file
*/
static public function unregister_by_file($file) {
$r = q("DELETE FROM hook WHERE file = '%s' ",
dbesc($file)
);
return $r;
}
/**
* @brief Inserts a hook into a page request.
*
* Insert a short-lived hook into the running page request.
* Hooks are normally persistent so that they can be called
* across asynchronous processes such as delivery and poll
* processes.
*
* insert_hook lets you attach a hook callback immediately
* which will not persist beyond the life of this page request
* or the current process.
*
* @param string $hook
* name of hook to attach callback
* @param string $fn
* function name of callback handler
* @param int $version
* hook interface version, 0 uses two callback params, 1 uses one callback param
* @param int $priority
* currently not implemented in this function, would require the hook array to be resorted
*/
static public function insert($hook, $fn, $version = 0, $priority = 0) {
if(is_array($fn)) {
$fn = serialize($fn);
}
if(! is_array(App::$hooks))
App::$hooks = array();
if(! array_key_exists($hook, App::$hooks))
App::$hooks[$hook] = array();
App::$hooks[$hook][] = array('', $fn, $priority, $version);
}
}
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