classes/pluginhost.php

   1 <?php
   2 class PluginHost {
   3         private $dbh;
   4         private $hooks = array();
   5         private $plugins = array();
   6         private $handlers = array();
   7         private $commands = array();
   8         private $storage = array();
   9         private $feeds = array();
  10         private $api_methods = array();
  11         private $plugin_actions = array();
  12         private $owner_uid;
  13         private $debug;
  14         private $last_registered;
  15         private static $instance;
  16
  17         const API_VERSION = 2;
  18
  19         // Hooks marked with *1 are run in global context and available
  20         // to plugins loaded in config.php only
  21
  22         const HOOK_ARTICLE_BUTTON = 1;
  23         const HOOK_ARTICLE_FILTER = 2;
  24         const HOOK_PREFS_TAB = 3;
  25         const HOOK_PREFS_TAB_SECTION = 4;
  26         const HOOK_PREFS_TABS = 5;
  27         const HOOK_FEED_PARSED = 6;
  28         const HOOK_UPDATE_TASK = 7; // *1
  29         const HOOK_AUTH_USER = 8;
  30         const HOOK_HOTKEY_MAP = 9;
  31         const HOOK_RENDER_ARTICLE = 10;
  32         const HOOK_RENDER_ARTICLE_CDM = 11;
  33         const HOOK_FEED_FETCHED = 12;
  34         const HOOK_SANITIZE = 13;
  35         const HOOK_RENDER_ARTICLE_API = 14;
  36         const HOOK_TOOLBAR_BUTTON = 15;
  37         const HOOK_ACTION_ITEM = 16;
  38         const HOOK_HEADLINE_TOOLBAR_BUTTON = 17;
  39         const HOOK_HOTKEY_INFO = 18;
  40         const HOOK_ARTICLE_LEFT_BUTTON = 19;
  41         const HOOK_PREFS_EDIT_FEED = 20;
  42         const HOOK_PREFS_SAVE_FEED = 21;
  43         const HOOK_FETCH_FEED = 22;
  44         const HOOK_QUERY_HEADLINES = 23;
  45         const HOOK_HOUSE_KEEPING = 24; // *1
  46         const HOOK_SEARCH = 25;
  47         const HOOK_FORMAT_ENCLOSURES = 26;
  48         const HOOK_SUBSCRIBE_FEED = 27;
  49         const HOOK_HEADLINES_BEFORE = 28;
  50         const HOOK_RENDER_ENCLOSURE = 29;
  51         const HOOK_ARTICLE_FILTER_ACTION = 30;
  52
  53         const KIND_ALL = 1;
  54         const KIND_SYSTEM = 2;
  55         const KIND_USER = 3;
  56
  57         function __construct() {
  58                 $this->dbh = Db::get();
  59
  60                 $this->storage = array();
  61         }
  62
  63         private function __clone() {
  64                 //
  65         }
  66
  67         public static function getInstance() {
  68                 if (self::$instance == null)
  69                         self::$instance = new self();
  70
  71                 return self::$instance;
  72         }
  73
  74         private function register_plugin($name, $plugin) {
  75                 //array_push($this->plugins, $plugin);
  76                 $this->plugins[$name] = $plugin;
  77         }
  78
  79         // needed for compatibility with API 1
  80         function get_link() {
  81                 return false;
  82         }
  83
  84         function get_dbh() {
  85                 return $this->dbh;
  86         }
  87
  88         function get_plugin_names() {
  89                 $names = array();
  90
  91                 foreach ($this->plugins as $p) {
  92                         array_push($names, get_class($p));
  93                 }
  94
  95                 return $names;
  96         }
  97
  98         function get_plugins() {
  99                 return $this->plugins;
 100         }
 101
 102         function get_plugin($name) {
 103                 return $this->plugins[strtolower($name)];
 104         }
 105
 106         function run_hooks($type, $method, $args) {
 107                 foreach ($this->get_hooks($type) as $hook) {
 108                         $hook->$method($args);
 109                 }
 110         }
 111
 112         function add_hook($type, $sender) {
 113                 if (!is_array($this->hooks[$type])) {
 114                         $this->hooks[$type] = array();
 115                 }
 116
 117                 array_push($this->hooks[$type], $sender);
 118         }
 119
 120         function del_hook($type, $sender) {
 121                 if (is_array($this->hooks[$type])) {
 122                         $key = array_Search($sender, $this->hooks[$type]);
 123                         if ($key !== FALSE) {
 124                                 unset($this->hooks[$type][$key]);
 125                         }
 126                 }
 127         }
 128
 129         function get_hooks($type) {
 130                 if (isset($this->hooks[$type])) {
 131                         return $this->hooks[$type];
 132                 } else {
 133                         return array();
 134                 }
 135         }
 136         function load_all($kind, $owner_uid = false) {
 137
 138                 $plugins = array_merge(glob("plugins/*"), glob("plugins.local/*"));
 139                 $plugins = array_filter($plugins, "is_dir");
 140                 $plugins = array_map("basename", $plugins);
 141
 142                 asort($plugins);
 143
 144                 $this->load(join(",", $plugins), $kind, $owner_uid);
 145         }
 146
 147         function load($classlist, $kind, $owner_uid = false) {
 148                 $plugins = explode(",", $classlist);
 149
 150                 $this->owner_uid = (int) $owner_uid;
 151
 152                 foreach ($plugins as $class) {
 153                         $class = trim($class);
 154                         $class_file = strtolower(basename($class));
 155
 156                         if (!is_dir(__DIR__."/../plugins/$class_file") &&
 157                                         !is_dir(__DIR__."/../plugins.local/$class_file")) continue;
 158
 159                         // try system plugin directory first
 160                         $file = __DIR__ . "/../plugins/$class_file/init.php";
 161
 162                         if (!file_exists($file)) {
 163                                 $file = __DIR__ . "/../plugins.local/$class_file/init.php";
 164                         }
 165
 166                         if (!isset($this->plugins[$class])) {
 167                                 if (file_exists($file)) require_once $file;
 168
 169                                 if (class_exists($class) && is_subclass_of($class, "Plugin")) {
 170                                         $plugin = new $class($this);
 171
 172                                         $plugin_api = $plugin->api_version();
 173
 174                                         if ($plugin_api < PluginHost::API_VERSION) {
 175                                                 user_error("Plugin $class is not compatible with current API version (need: " . PluginHost::API_VERSION . ", got: $plugin_api)", E_USER_WARNING);
 176                                                 continue;
 177                                         }
 178
 179                                         $this->last_registered = $class;
 180
 181                                         switch ($kind) {
 182                                         case $this::KIND_SYSTEM:
 183                                                 if ($this->is_system($plugin)) {
 184                                                         $plugin->init($this);
 185                                                         $this->register_plugin($class, $plugin);
 186                                                 }
 187                                                 break;
 188                                         case $this::KIND_USER:
 189                                                 if (!$this->is_system($plugin)) {
 190                                                         $plugin->init($this);
 191                                                         $this->register_plugin($class, $plugin);
 192                                                 }
 193                                                 break;
 194                                         case $this::KIND_ALL:
 195                                                 $plugin->init($this);
 196                                                 $this->register_plugin($class, $plugin);
 197                                                 break;
 198                                         }
 199                                 }
 200                         }
 201                 }
 202         }
 203
 204         function is_system($plugin) {
 205                 $about = $plugin->about();
 206
 207                 return @$about[3];
 208         }
 209
 210         // only system plugins are allowed to modify routing
 211         function add_handler($handler, $method, $sender) {
 212                 $handler = str_replace("-", "_", strtolower($handler));
 213                 $method = strtolower($method);
 214
 215                 if ($this->is_system($sender)) {
 216                         if (!is_array($this->handlers[$handler])) {
 217                                 $this->handlers[$handler] = array();
 218                         }
 219
 220                         $this->handlers[$handler][$method] = $sender;
 221                 }
 222         }
 223
 224         function del_handler($handler, $method, $sender) {
 225                 $handler = str_replace("-", "_", strtolower($handler));
 226                 $method = strtolower($method);
 227
 228                 if ($this->is_system($sender)) {
 229                         unset($this->handlers[$handler][$method]);
 230                 }
 231         }
 232
 233         function lookup_handler($handler, $method) {
 234                 $handler = str_replace("-", "_", strtolower($handler));
 235                 $method = strtolower($method);
 236
 237                 if (is_array($this->handlers[$handler])) {
 238                         if (isset($this->handlers[$handler]["*"])) {
 239                                 return $this->handlers[$handler]["*"];
 240                         } else {
 241                                 return $this->handlers[$handler][$method];
 242                         }
 243                 }
 244
 245                 return false;
 246         }
 247
 248         function add_command($command, $description, $sender, $suffix = "", $arghelp = "") {
 249                 $command = str_replace("-", "_", strtolower($command));
 250
 251                 $this->commands[$command] = array("description" => $description,
 252                         "suffix" => $suffix,
 253                         "arghelp" => $arghelp,
 254                         "class" => $sender);
 255         }
 256
 257         function del_command($command) {
 258                 $command = "-" . strtolower($command);
 259
 260                 unset($this->commands[$command]);
 261         }
 262
 263         function lookup_command($command) {
 264                 $command = "-" . strtolower($command);
 265
 266                 if (is_array($this->commands[$command])) {
 267                         return $this->commands[$command]["class"];
 268                 } else {
 269                         return false;
 270                 }
 271
 272                 return false;
 273         }
 274
 275         function get_commands() {
 276                 return $this->commands;
 277         }
 278
 279         function run_commands($args) {
 280                 foreach ($this->get_commands() as $command => $data) {
 281                         if (isset($args[$command])) {
 282                                 $command = str_replace("-", "", $command);
 283                                 $data["class"]->$command($args);
 284                         }
 285                 }
 286         }
 287
 288         function load_data($force = false) {
 289                 if ($this->owner_uid)  {
 290                         $result = $this->dbh->query("SELECT name, content FROM ttrss_plugin_storage
 291                                 WHERE owner_uid = '".$this->owner_uid."'");
 292
 293                         while ($line = $this->dbh->fetch_assoc($result)) {
 294                                 $this->storage[$line["name"]] = unserialize($line["content"]);
 295                         }
 296                 }
 297         }
 298
 299         private function save_data($plugin) {
 300                 if ($this->owner_uid) {
 301                         $plugin = $this->dbh->escape_string($plugin);
 302
 303                         $this->dbh->query("BEGIN");
 304
 305                         $result = $this->dbh->query("SELECT id FROM ttrss_plugin_storage WHERE
 306                                 owner_uid= '".$this->owner_uid."' AND name = '$plugin'");
 307
 308                         if (!isset($this->storage[$plugin]))
 309                                 $this->storage[$plugin] = array();
 310
 311                         $content = $this->dbh->escape_string(serialize($this->storage[$plugin]),
 312                                 false);
 313
 314                         if ($this->dbh->num_rows($result) != 0) {
 315                                 $this->dbh->query("UPDATE ttrss_plugin_storage SET content = '$content'
 316                                         WHERE owner_uid= '".$this->owner_uid."' AND name = '$plugin'");
 317
 318                         } else {
 319                                 $this->dbh->query("INSERT INTO ttrss_plugin_storage
 320                                         (name,owner_uid,content) VALUES
 321                                         ('$plugin','".$this->owner_uid."','$content')");
 322                         }
 323
 324                         $this->dbh->query("COMMIT");
 325                 }
 326         }
 327
 328         function set($sender, $name, $value, $sync = true) {
 329                 $idx = get_class($sender);
 330
 331                 if (!isset($this->storage[$idx]))
 332                         $this->storage[$idx] = array();
 333
 334                 $this->storage[$idx][$name] = $value;
 335
 336                 if ($sync) $this->save_data(get_class($sender));
 337         }
 338
 339         function get($sender, $name, $default_value = false) {
 340                 $idx = get_class($sender);
 341
 342                 if (isset($this->storage[$idx][$name])) {
 343                         return $this->storage[$idx][$name];
 344                 } else {
 345                         return $default_value;
 346                 }
 347         }
 348
 349         function get_all($sender) {
 350                 $idx = get_class($sender);
 351
 352                 return $this->storage[$idx];
 353         }
 354
 355         function clear_data($sender) {
 356                 if ($this->owner_uid) {
 357                         $idx = get_class($sender);
 358
 359                         unset($this->storage[$idx]);
 360
 361                         $this->dbh->query("DELETE FROM ttrss_plugin_storage WHERE name = '$idx'
 362                                 AND owner_uid = " . $this->owner_uid);
 363                 }
 364         }
 365
 366         function set_debug($debug) {
 367                 $this->debug = $debug;
 368         }
 369
 370         function get_debug() {
 371                 return $this->debug;
 372         }
 373
 374         // Plugin feed functions are *EXPERIMENTAL*!
 375
 376         // cat_id: only -1 is supported (Special)
 377         function add_feed($cat_id, $title, $icon, $sender) {
 378                 if (!$this->feeds[$cat_id]) $this->feeds[$cat_id] = array();
 379
 380                 $id = count($this->feeds[$cat_id]);
 381
 382                 array_push($this->feeds[$cat_id],
 383                         array('id' => $id, 'title' => $title, 'sender' => $sender, 'icon' => $icon));
 384
 385                 return $id;
 386         }
 387
 388         function get_feeds($cat_id) {
 389                 return $this->feeds[$cat_id];
 390         }
 391
 392         // convert feed_id (e.g. -129) to pfeed_id first
 393         function get_feed_handler($pfeed_id) {
 394                 foreach ($this->feeds as $cat) {
 395                         foreach ($cat as $feed) {
 396                                 if ($feed['id'] == $pfeed_id) {
 397                                         return $feed['sender'];
 398                                 }
 399                         }
 400                 }
 401         }
 402
 403         static function pfeed_to_feed_id($label) {
 404                 return PLUGIN_FEED_BASE_INDEX - 1 - abs($label);
 405         }
 406
 407         static function feed_to_pfeed_id($feed) {
 408                 return PLUGIN_FEED_BASE_INDEX - 1 + abs($feed);
 409         }
 410
 411         function add_api_method($name, $sender) {
 412                 if ($this->is_system($sender)) {
 413                         $this->api_methods[strtolower($name)] = $sender;
 414                 }
 415         }
 416
 417         function get_api_method($name) {
 418                 return $this->api_methods[$name];
 419         }
 420
 421         function add_filter_action($sender, $action_name, $action_desc) {
 422                 $sender_class = get_class($sender);
 423
 424                 if (!isset($this->plugin_actions[$sender_class]))
 425                         $this->plugin_actions[$sender_class] = array();
 426
 427                 array_push($this->plugin_actions[$sender_class],
 428                         array("action" => $action_name, "description" => $action_desc, "sender" => $sender));
 429         }
 430
 431         function get_filter_actions() {
 432                 return $this->plugin_actions;
 433         }
 434 }
 435 ?>