ttrss/classes/pluginhost.php

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<?php
class PluginHost {
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private $pdo;
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private $hooks = array();
private $plugins = array();
private $handlers = array();
private $commands = array();
private $storage = array();
private $feeds = array();
private $api_methods = array();
private $plugin_actions = array();
private $owner_uid;
private $debug;
private $last_registered;
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private static $instance;
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const API_VERSION = 2;
// Hooks marked with *1 are run in global context and available
// to plugins loaded in config.php only
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const HOOK_ARTICLE_BUTTON = 1;
const HOOK_ARTICLE_FILTER = 2;
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const HOOK_PREFS_TAB = 3;
const HOOK_PREFS_TAB_SECTION = 4;
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const HOOK_PREFS_TABS = 5;
const HOOK_FEED_PARSED = 6;
const HOOK_UPDATE_TASK = 7; // *1
const HOOK_AUTH_USER = 8;
const HOOK_HOTKEY_MAP = 9;
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const HOOK_RENDER_ARTICLE = 10;
const HOOK_RENDER_ARTICLE_CDM = 11;
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const HOOK_FEED_FETCHED = 12;
const HOOK_SANITIZE = 13;
const HOOK_RENDER_ARTICLE_API = 14;
const HOOK_TOOLBAR_BUTTON = 15;
const HOOK_ACTION_ITEM = 16;
const HOOK_HEADLINE_TOOLBAR_BUTTON = 17;
const HOOK_HOTKEY_INFO = 18;
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const HOOK_ARTICLE_LEFT_BUTTON = 19;
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const HOOK_PREFS_EDIT_FEED = 20;
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const HOOK_PREFS_SAVE_FEED = 21;
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const HOOK_FETCH_FEED = 22;
const HOOK_QUERY_HEADLINES = 23;
const HOOK_HOUSE_KEEPING = 24; // *1
const HOOK_SEARCH = 25;
const HOOK_FORMAT_ENCLOSURES = 26;
const HOOK_SUBSCRIBE_FEED = 27;
const HOOK_HEADLINES_BEFORE = 28;
const HOOK_RENDER_ENCLOSURE = 29;
const HOOK_ARTICLE_FILTER_ACTION = 30;
const HOOK_ARTICLE_EXPORT_FEED = 31;
const HOOK_MAIN_TOOLBAR_BUTTON = 32;
const HOOK_ENCLOSURE_ENTRY = 33;
const HOOK_FORMAT_ARTICLE = 34;
const HOOK_FORMAT_ARTICLE_CDM = 35;
const HOOK_FEED_BASIC_INFO = 36;
const HOOK_SEND_LOCAL_FILE = 37;
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const HOOK_UNSUBSCRIBE_FEED = 38;
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const KIND_ALL = 1;
const KIND_SYSTEM = 2;
const KIND_USER = 3;
function __construct() {
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$this->pdo = Db::pdo();
$this->storage = array();
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}
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private function __clone() {
//
}
public static function getInstance() {
if (self::$instance == null)
self::$instance = new self();
return self::$instance;
}
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private function register_plugin($name, $plugin) {
//array_push($this->plugins, $plugin);
$this->plugins[$name] = $plugin;
}
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// needed for compatibility with API 1
function get_link() {
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return false;
}
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function get_dbh() {
return Db::get();
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}
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function get_pdo() {
return $this->pdo;
}
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function get_plugin_names() {
$names = array();
foreach ($this->plugins as $p) {
array_push($names, get_class($p));
}
return $names;
}
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function get_plugins() {
return $this->plugins;
}
function get_plugin($name) {
return $this->plugins[strtolower($name)];
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}
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function run_hooks($type, $method, $args) {
foreach ($this->get_hooks($type) as $hook) {
$hook->$method($args);
}
}
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function add_hook($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])) {
$key = array_Search($sender, $this->hooks[$type]);
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if ($key !== FALSE) {
unset($this->hooks[$type][$key]);
}
}
}
function get_hooks($type) {
if (isset($this->hooks[$type])) {
return $this->hooks[$type];
} else {
return array();
}
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}
function load_all($kind, $owner_uid = false, $skip_init = false) {
$plugins = array_merge(glob("plugins/*"), glob("plugins.local/*"));
$plugins = array_filter($plugins, "is_dir");
$plugins = array_map("basename", $plugins);
asort($plugins);
$this->load(join(",", $plugins), $kind, $owner_uid, $skip_init);
}
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function load($classlist, $kind, $owner_uid = false, $skip_init = false) {
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$plugins = explode(",", $classlist);
$this->owner_uid = (int) $owner_uid;
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foreach ($plugins as $class) {
$class = trim($class);
$class_file = strtolower(basename($class));
if (!is_dir(__DIR__."/../plugins/$class_file") &&
!is_dir(__DIR__."/../plugins.local/$class_file")) continue;
// try system plugin directory first
$file = __DIR__ . "/../plugins/$class_file/init.php";
if (!file_exists($file)) {
$file = __DIR__ . "/../plugins.local/$class_file/init.php";
}
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if (!isset($this->plugins[$class])) {
if (file_exists($file)) require_once $file;
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if (class_exists($class) && is_subclass_of($class, "Plugin")) {
$plugin = new $class($this);
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$plugin_api = $plugin->api_version();
if ($plugin_api < PluginHost::API_VERSION) {
user_error("Plugin $class is not compatible with current API version (need: " . PluginHost::API_VERSION . ", got: $plugin_api)", E_USER_WARNING);
continue;
}
$this->last_registered = $class;
switch ($kind) {
case $this::KIND_SYSTEM:
if ($this->is_system($plugin)) {
if (!$skip_init) $plugin->init($this);
$this->register_plugin($class, $plugin);
}
break;
case $this::KIND_USER:
if (!$this->is_system($plugin)) {
if (!$skip_init) $plugin->init($this);
$this->register_plugin($class, $plugin);
}
break;
case $this::KIND_ALL:
if (!$skip_init) $plugin->init($this);
$this->register_plugin($class, $plugin);
break;
}
}
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}
}
}
function is_system($plugin) {
$about = $plugin->about();
return @$about[3];
}
// only system plugins are allowed to modify routing
function add_handler($handler, $method, $sender) {
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$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] = $sender;
}
}
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function del_handler($handler, $method, $sender) {
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$handler = str_replace("-", "_", strtolower($handler));
$method = strtolower($method);
if ($this->is_system($sender)) {
unset($this->handlers[$handler][$method]);
}
}
function lookup_handler($handler, $method) {
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$handler = str_replace("-", "_", strtolower($handler));
$method = strtolower($method);
if (is_array($this->handlers[$handler])) {
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if (isset($this->handlers[$handler]["*"])) {
return $this->handlers[$handler]["*"];
} else {
return $this->handlers[$handler][$method];
}
}
return false;
}
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function add_command($command, $description, $sender, $suffix = "", $arghelp = "") {
$command = str_replace("-", "_", strtolower($command));
$this->commands[$command] = array("description" => $description,
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"suffix" => $suffix,
"arghelp" => $arghelp,
"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;
}
}
function get_commands() {
return $this->commands;
}
function run_commands($args) {
foreach ($this->get_commands() as $command => $data) {
if (isset($args[$command])) {
$command = str_replace("-", "", $command);
$data["class"]->$command($args);
}
}
}
function load_data() {
if ($this->owner_uid) {
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$sth = $this->pdo->prepare("SELECT name, content FROM ttrss_plugin_storage
WHERE owner_uid = ?");
$sth->execute([$this->owner_uid]);
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while ($line = $sth->fetch()) {
$this->storage[$line["name"]] = unserialize($line["content"]);
}
}
}
private function save_data($plugin) {
if ($this->owner_uid) {
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$this->pdo->beginTransaction();
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$sth = $this->pdo->prepare("SELECT id FROM ttrss_plugin_storage WHERE
owner_uid= ? AND name = ?");
$sth->execute([$this->owner_uid, $plugin]);
if (!isset($this->storage[$plugin]))
$this->storage[$plugin] = array();
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$content = serialize($this->storage[$plugin]);
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if ($sth->fetch()) {
$sth = $this->pdo->prepare("UPDATE ttrss_plugin_storage SET content = ?
WHERE owner_uid= ? AND name = ?");
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$sth->execute([(string)$content, $this->owner_uid, $plugin]);
} else {
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$sth = $this->pdo->prepare("INSERT INTO ttrss_plugin_storage
(name,owner_uid,content) VALUES
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(?, ?, ?)");
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$sth->execute([$plugin, $this->owner_uid, (string)$content]);
}
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$this->pdo->commit();
}
}
function set($sender, $name, $value, $sync = true) {
$idx = get_class($sender);
if (!isset($this->storage[$idx]))
$this->storage[$idx] = array();
$this->storage[$idx][$name] = $value;
if ($sync) $this->save_data(get_class($sender));
}
function get($sender, $name, $default_value = false) {
$idx = get_class($sender);
if (isset($this->storage[$idx][$name])) {
return $this->storage[$idx][$name];
} else {
return $default_value;
}
}
function get_all($sender) {
$idx = get_class($sender);
return $this->storage[$idx];
}
function clear_data($sender) {
if ($this->owner_uid) {
$idx = get_class($sender);
unset($this->storage[$idx]);
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$sth = $this->pdo->prepare("DELETE FROM ttrss_plugin_storage WHERE name = ?
AND owner_uid = ?");
$sth->execute([$idx, $this->owner_uid]);
}
}
function set_debug($debug) {
$this->debug = $debug;
}
function get_debug() {
return $this->debug;
}
// Plugin feed functions are *EXPERIMENTAL*!
// cat_id: only -1 is supported (Special)
function add_feed($cat_id, $title, $icon, $sender) {
if (!$this->feeds[$cat_id]) $this->feeds[$cat_id] = array();
$id = count($this->feeds[$cat_id]);
array_push($this->feeds[$cat_id],
array('id' => $id, 'title' => $title, 'sender' => $sender, 'icon' => $icon));
return $id;
}
function get_feeds($cat_id) {
return $this->feeds[$cat_id];
}
// convert feed_id (e.g. -129) to pfeed_id first
function get_feed_handler($pfeed_id) {
foreach ($this->feeds as $cat) {
foreach ($cat as $feed) {
if ($feed['id'] == $pfeed_id) {
return $feed['sender'];
}
}
}
}
static function pfeed_to_feed_id($label) {
return PLUGIN_FEED_BASE_INDEX - 1 - abs($label);
}
static function feed_to_pfeed_id($feed) {
return PLUGIN_FEED_BASE_INDEX - 1 + abs($feed);
}
function add_api_method($name, $sender) {
if ($this->is_system($sender)) {
$this->api_methods[strtolower($name)] = $sender;
}
}
function get_api_method($name) {
return $this->api_methods[$name];
}
function add_filter_action($sender, $action_name, $action_desc) {
$sender_class = get_class($sender);
if (!isset($this->plugin_actions[$sender_class]))
$this->plugin_actions[$sender_class] = array();
array_push($this->plugin_actions[$sender_class],
array("action" => $action_name, "description" => $action_desc, "sender" => $sender));
}
function get_filter_actions() {
return $this->plugin_actions;
}
}