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<?php defined("SYSPATH") or die("No direct script access.");
/**
* Gallery - a web based photo album viewer and editor
* Copyright (C) 2000-2008 Bharat Mediratta
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
/**
* This is the API for handling modules.
*
* Note: by design, this class does not do any permission checking.
*/
class module_Core {
private static $module_names = array();
private static $modules = array();
public static function get_version($module_name) {
return ORM::factory("module")->where("name", $module_name)->find()->version;
}
/**
* Set the version of the corresponding Module_Model
* @param string $module_name
* @param integer $version
*/
public static function set_version($module_name, $version) {
$module = ORM::factory("module")->where("name", $module_name)->find();
if (!$module->loaded) {
$module->name = $module_name;
}
$module->version = 1;
$module->save();
Kohana::log("debug", "$module_name: version is now $version");
}
/**
* Load the corresponding Module_Model
* @param string $module_name
*/
public static function get($module_name) {
return model_cache::get("module", $module_name, "name");
}
/**
* Delete the corresponding Module_Model
* @param string $module_name
*/
public static function delete($module_name) {
$module = ORM::factory("module")->where("name", $module_name)->find();
$module_id = $module->id;
$module->delete();
$db = Database::instance();
$db->query("DELETE FROM vars WHERE module_id = '{$module->id}';");
Kohana::log("debug", "$module_name: module deleted");
}
/**
* Check to see if a module is installed
* @param string $module_name
*/
public static function is_installed($module_name) {
return in_array($module_name, self::$module_names);
}
/**
* Return the list of installed modules.
*/
public static function installed() {
return self::$modules;
}
/**
* Return the list of available modules.
*/
public static function available() {
$modules = array();
foreach (glob(MODPATH . "*/helpers/*_installer.php") as $file) {
if (empty($modules[basename(dirname(dirname($file)))])) {
$modules[basename(dirname(dirname($file)))] = 0;
}
}
return $modules;
}
/**
* Install a module.
*/
public static function install($module_name) {
$installer_class = "{$module_name}_installer";
Kohana::log("debug", "$installer_class install (initial)");
if ($module_name != "core") {
require_once(DOCROOT . "modules/${module_name}/helpers/{$installer_class}.php");
}
$kohana_modules = Kohana::config('core.modules');
$kohana_modules[] = MODPATH . $module_name;
Kohana::config_set('core.modules', $kohana_modules);
call_user_func(array($installer_class, "install"));
if (method_exists($installer_class, "install")) {
call_user_func_array(array($installer_class, "install"), array());
}
self::load_modules();
}
/**
* Uninstall a module.
*/
public static function uninstall($module_name) {
$installer_class = "{$module_name}_installer";
Kohana::log("debug", "$installer_class uninstall");
call_user_func(array($installer_class, "uninstall"));
}
/**
* Load the active modules. This is called at bootstrap time.
*/
public static function load_modules() {
// Reload module list from the config file since we'll do a refresh after calling install()
$core = Kohana::config_load('core');
$kohana_modules = $core['modules'];
self::$module_names = array();
self::$modules = array();
// This is one of the first database operations that we'll do, so it may fail if there's no
// install yet. Try to handle this situation gracefully expecting that the scaffolding will
// Do The Right Thing.
//
// @todo get rid of this extra error checking when we have an installer.
try {
$modules = ORM::factory("module")->find_all();
} catch (Exception $e) {
return;
}
try {
foreach ($modules as $module) {
self::$module_names[] = $module->name;
self::$modules[] = $module;
$kohana_modules[] = MODPATH . $module->name;
}
Kohana::config_set('core.modules', $kohana_modules);
} catch (Exception $e) {
self::$module_names = array();
self::$modules = array();
}
self::event("gallery_ready");
}
/**
* Load the active theme. This is called at bootstrap time. We will only ever have one theme
* active for any given request.
*/
public static function load_themes() {
$modules = Kohana::config('core.modules');
if (Router::$controller == "admin") {
array_unshift($modules, THEMEPATH . 'admin_default');
} else {
array_unshift($modules, THEMEPATH . 'default');
}
Kohana::config_set('core.modules', $modules);
}
/**
* Run a specific event on all active modules.
* @param string $name the event name
* @param mixed $data data to pass to each event handler
*/
public static function event($name, &$data=null) {
foreach (self::installed() as $module) {
$class = "{$module->name}_event";
$function = str_replace(".", "_", $name);
if (method_exists($class, $function)) {
call_user_func_array(array($class, $function), array(&$data));
}
}
}
/**
* Get a variable from this module
* @param string $module_name
* @param string $name
* @param string $default_value
* @return the value
*/
public function get_var($module_name, $name, $default_value=null) {
$module = model_cache::get("module", $module_name, "name");
$var = ORM::factory("var")
->where("module_id", $module->id)
->where("name", $name)
->find();
return $var->loaded ? $var->value : $default_value;
}
/**
* Store a variable for this module
* @param string $module_name
* @param string $name
* @param string $value
*/
public function set_var($module_name, $name, $value) {
$module = model_cache::get("module", $module_name, "name");
$var = ORM::factory("var")
->where("module_id", $module->id)
->where("name", $name)
->find();
if (!$var->loaded) {
$var = ORM::factory("var");
$var->module_id = $module->id;
$var->name = $name;
}
$var->value = $value;
$var->save();
}
}
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