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<?php
class PluginHost {
private $link;
private $hooks = array();
private $plugins = array();
private $handlers = array();
private $commands = array();
const HOOK_ARTICLE_BUTTON = 1;
const HOOK_ARTICLE_FILTER = 2;
const HOOK_PREFS_TAB = 3;
const HOOK_PREFS_TAB_SECTION = 4;
const HOOK_PREFS_TABS = 5;
const HOOK_FEED_PARSED = 6;
const HOOK_UPDATE_TASK = 7;
const HOOK_AUTH_USER = 8;
const KIND_ALL = 1;
const KIND_SYSTEM = 2;
const KIND_USER = 3;
function __construct($link) {
$this->link = $link;
}
private function register_plugin($name, $plugin) {
//array_push($this->plugins, $plugin);
$this->plugins[$name] = $plugin;
}
function get_link() {
return $this->link;
}
function get_plugins() {
return $this->plugins;
}
function get_plugin($name) {
return $this->plugins[$name];
}
function run_hooks($type, $method, $args) {
foreach ($this->get_hooks($type) as $hook) {
$hook->$method($args);
}
}
function add_hook($type, $sender) {
if (!is_array($this->hooks[$type])) {
$this->hooks[$type] = array();
}
array_push($this->hooks[$type], $sender);
}
function del_hook($type, $sender) {
if (is_array($this->hooks[$type])) {
$key = array_Search($this->hooks[$type], $sender);
if ($key !== FALSE) {
unset($this->hooks[$type][$key]);
}
}
}
function get_hooks($type) {
if (isset($this->hooks[$type])) {
return $this->hooks[$type];
} else {
return array();
}
}
function load_all($kind) {
$plugins = array_map("basename", glob("plugins/*"));
$this->load(join(",", $plugins), $kind);
}
function load($classlist, $kind) {
$plugins = explode(",", $classlist);
foreach ($plugins as $class) {
$class = trim($class);
$class_file = strtolower(basename($class));
$file = dirname(__FILE__)."/../plugins/$class_file/$class_file.php";
if (!isset($this->plugins[$class])) {
if (file_exists($file)) require_once $file;
if (class_exists($class) && is_subclass_of($class, "Plugin")) {
$plugin = new $class($this);
switch ($kind) {
case $this::KIND_SYSTEM:
if ($this->is_system($plugin)) {
$plugin->init($this);
$this->register_plugin($class, $plugin);
}
break;
case $this::KIND_USER:
if (!$this->is_system($plugin)) {
$plugin->init($this);
$this->register_plugin($class, $plugin);
}
break;
case $this::KIND_ALL:
$plugin->init($this);
$this->register_plugin($class, $plugin);
break;
}
}
}
}
}
function is_system($plugin) {
$about = $plugin->about();
return @$about[3];
}
// only system plugins are allowed to modify routing
function add_handler($handler, $method, $sender) {
$handler = str_replace("-", "_", strtolower($handler));
$method = strtolower($method);
if ($this->is_system($sender)) {
if (!is_array($this->handlers[$handler])) {
$this->handlers[$handler] = array();
}
$this->handlers[$handler][$method] = $sender;
}
}
function del_handler($handler, $method) {
$handler = str_replace("-", "_", strtolower($handler));
$method = strtolower($method);
if ($this->is_system($sender)) {
unset($this->handlers[$handler][$method]);
}
}
function lookup_handler($handler, $method) {
$handler = str_replace("-", "_", strtolower($handler));
$method = strtolower($method);
if (is_array($this->handlers[$handler])) {
if (isset($this->handlers[$handler]["*"])) {
return $this->handlers[$handler]["*"];
} else {
return $this->handlers[$handler][$method];
}
}
return false;
}
function add_command($command, $description, $sender) {
$command = "-" . str_replace("-", "_", strtolower($command));
$this->commands[$command] = array("description" => $description,
"class" => $sender);
}
function del_command($command) {
$command = "-" . strtolower($command);
unset($this->commands[$command]);
}
function lookup_command($command) {
$command = "-" . strtolower($command);
if (is_array($this->commands[$command])) {
return $this->commands[$command]["class"];
} else {
return false;
}
return false;
}
function get_commands() {
return $this->commands;
}
function run_commands($args) {
foreach ($this->get_commands() as $command => $data) {
if (in_array($command, $args)) {
$command = str_replace("-", "", $command);
$data["class"]->$command($args);
}
}
}
}
?>
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