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         const HOOK_ARTICLE_EXPORT_FEED = 31;
  53         const HOOK_MAIN_TOOLBAR_BUTTON = 32;
  54         const HOOK_ENCLOSURE_ENTRY = 33;
  55         const HOOK_FORMAT_ARTICLE = 34;
  56         const HOOK_FORMAT_ARTICLE_CDM = 35;
  57
  58         const KIND_ALL = 1;
  59         const KIND_SYSTEM = 2;
  60         const KIND_USER = 3;
  61
  62         function __construct() {
  63                 $this->dbh = Db::get();
  64
  65                 $this->storage = array();
  66         }
  67
  68         private function __clone() {
  69                 //
  70         }
  71
  72         public static function getInstance() {
  73                 if (self::$instance == null)
  74                         self::$instance = new self();
  75
  76                 return self::$instance;
  77         }
  78
  79         private function register_plugin($name, $plugin) {
  80                 //array_push($this->plugins, $plugin);
  81                 $this->plugins[$name] = $plugin;
  82         }
  83
  84         // needed for compatibility with API 1
  85         function get_link() {
  86                 return false;
  87         }
  88
  89         function get_dbh() {
  90                 return $this->dbh;
  91         }
  92
  93         function get_plugin_names() {
  94                 $names = array();
  95
  96                 foreach ($this->plugins as $p) {
  97                         array_push($names, get_class($p));
  98                 }
  99
 100                 return $names;
 101         }
 102
 103         function get_plugins() {
 104                 return $this->plugins;
 105         }
 106
 107         function get_plugin($name) {
 108                 return $this->plugins[strtolower($name)];
 109         }
 110
 111         function run_hooks($type, $method, $args) {
 112                 foreach ($this->get_hooks($type) as $hook) {
 113                         $hook->$method($args);
 114                 }
 115         }
 116
 117         function add_hook($type, $sender) {
 118                 if (!is_array($this->hooks[$type])) {
 119                         $this->hooks[$type] = array();
 120                 }
 121
 122                 array_push($this->hooks[$type], $sender);
 123         }
 124
 125         function del_hook($type, $sender) {
 126                 if (is_array($this->hooks[$type])) {
 127                         $key = array_Search($sender, $this->hooks[$type]);
 128                         if ($key !== FALSE) {
 129                                 unset($this->hooks[$type][$key]);
 130                         }
 131                 }
 132         }
 133
 134         function get_hooks($type) {
 135                 if (isset($this->hooks[$type])) {
 136                         return $this->hooks[$type];
 137                 } else {
 138                         return array();
 139                 }
 140         }
 141         function load_all($kind, $owner_uid = false, $skip_init = false) {
 142
 143                 $plugins = array_merge(glob("plugins/*"), glob("plugins.local/*"));
 144                 $plugins = array_filter($plugins, "is_dir");
 145                 $plugins = array_map("basename", $plugins);
 146
 147                 asort($plugins);
 148
 149                 $this->load(join(",", $plugins), $kind, $owner_uid, $skip_init);
 150         }
 151
 152         function load($classlist, $kind, $owner_uid = false, $skip_init = false) {
 153                 $plugins = explode(",", $classlist);
 154
 155                 $this->owner_uid = (int) $owner_uid;
 156
 157                 foreach ($plugins as $class) {
 158                         $class = trim($class);
 159                         $class_file = strtolower(basename($class));
 160
 161                         if (!is_dir(__DIR__."/../plugins/$class_file") &&
 162                                         !is_dir(__DIR__."/../plugins.local/$class_file")) continue;
 163
 164                         // try system plugin directory first
 165                         $file = __DIR__ . "/../plugins/$class_file/init.php";
 166
 167                         if (!file_exists($file)) {
 168                                 $file = __DIR__ . "/../plugins.local/$class_file/init.php";
 169                         }
 170
 171                         if (!isset($this->plugins[$class])) {
 172                                 if (file_exists($file)) require_once $file;
 173
 174                                 if (class_exists($class) && is_subclass_of($class, "Plugin")) {
 175                                         $plugin = new $class($this);
 176
 177                                         $plugin_api = $plugin->api_version();
 178
 179                                         if ($plugin_api < PluginHost::API_VERSION) {
 180                                                 user_error("Plugin $class is not compatible with current API version (need: " . PluginHost::API_VERSION . ", got: $plugin_api)", E_USER_WARNING);
 181                                                 continue;
 182                                         }
 183
 184                                         $this->last_registered = $class;
 185
 186                                         switch ($kind) {
 187                                         case $this::KIND_SYSTEM:
 188                                                 if ($this->is_system($plugin)) {
 189                                                         if (!$skip_init) $plugin->init($this);
 190                                                         $this->register_plugin($class, $plugin);
 191                                                 }
 192                                                 break;
 193                                         case $this::KIND_USER:
 194                                                 if (!$this->is_system($plugin)) {
 195                                                         if (!$skip_init) $plugin->init($this);
 196                                                         $this->register_plugin($class, $plugin);
 197                                                 }
 198                                                 break;
 199                                         case $this::KIND_ALL:
 200                                                 if (!$skip_init) $plugin->init($this);
 201                                                 $this->register_plugin($class, $plugin);
 202                                                 break;
 203                                         }
 204                                 }
 205                         }
 206                 }
 207         }
 208
 209         function is_system($plugin) {
 210                 $about = $plugin->about();
 211
 212                 return @$about[3];
 213         }
 214
 215         // only system plugins are allowed to modify routing
 216         function add_handler($handler, $method, $sender) {
 217                 $handler = str_replace("-", "_", strtolower($handler));
 218                 $method = strtolower($method);
 219
 220                 if ($this->is_system($sender)) {
 221                         if (!is_array($this->handlers[$handler])) {
 222                                 $this->handlers[$handler] = array();
 223                         }
 224
 225                         $this->handlers[$handler][$method] = $sender;
 226                 }
 227         }
 228
 229         function del_handler($handler, $method, $sender) {
 230                 $handler = str_replace("-", "_", strtolower($handler));
 231                 $method = strtolower($method);
 232
 233                 if ($this->is_system($sender)) {
 234                         unset($this->handlers[$handler][$method]);
 235                 }
 236         }
 237
 238         function lookup_handler($handler, $method) {
 239                 $handler = str_replace("-", "_", strtolower($handler));
 240                 $method = strtolower($method);
 241
 242                 if (is_array($this->handlers[$handler])) {
 243                         if (isset($this->handlers[$handler]["*"])) {
 244                                 return $this->handlers[$handler]["*"];
 245                         } else {
 246                                 return $this->handlers[$handler][$method];
 247                         }
 248                 }
 249
 250                 return false;
 251         }
 252
 253         function add_command($command, $description, $sender, $suffix = "", $arghelp = "") {
 254                 $command = str_replace("-", "_", strtolower($command));
 255
 256                 $this->commands[$command] = array("description" => $description,
 257                         "suffix" => $suffix,
 258                         "arghelp" => $arghelp,
 259                         "class" => $sender);
 260         }
 261
 262         function del_command($command) {
 263                 $command = "-" . strtolower($command);
 264
 265                 unset($this->commands[$command]);
 266         }
 267
 268         function lookup_command($command) {
 269                 $command = "-" . strtolower($command);
 270
 271                 if (is_array($this->commands[$command])) {
 272                         return $this->commands[$command]["class"];
 273                 } else {
 274                         return false;
 275                 }
 276
 277                 return false;
 278         }
 279
 280         function get_commands() {
 281                 return $this->commands;
 282         }
 283
 284         function run_commands($args) {
 285                 foreach ($this->get_commands() as $command => $data) {
 286                         if (isset($args[$command])) {
 287                                 $command = str_replace("-", "", $command);
 288                                 $data["class"]->$command($args);
 289                         }
 290                 }
 291         }
 292
 293         function load_data() {
 294                 if ($this->owner_uid)  {
 295                         $result = $this->dbh->query("SELECT name, content FROM ttrss_plugin_storage
 296                                 WHERE owner_uid = '".$this->owner_uid."'");
 297
 298                         while ($line = $this->dbh->fetch_assoc($result)) {
 299                                 $this->storage[$line["name"]] = unserialize($line["content"]);
 300                         }
 301                 }
 302         }
 303
 304         private function save_data($plugin) {
 305                 if ($this->owner_uid) {
 306                         $plugin = $this->dbh->escape_string($plugin);
 307
 308                         $this->dbh->query("BEGIN");
 309
 310                         $result = $this->dbh->query("SELECT id FROM ttrss_plugin_storage WHERE
 311                                 owner_uid= '".$this->owner_uid."' AND name = '$plugin'");
 312
 313                         if (!isset($this->storage[$plugin]))
 314                                 $this->storage[$plugin] = array();
 315
 316                         $content = $this->dbh->escape_string(serialize($this->storage[$plugin]),
 317                                 false);
 318
 319                         if ($this->dbh->num_rows($result) != 0) {
 320                                 $this->dbh->query("UPDATE ttrss_plugin_storage SET content = '$content'
 321                                         WHERE owner_uid= '".$this->owner_uid."' AND name = '$plugin'");
 322
 323                         } else {
 324                                 $this->dbh->query("INSERT INTO ttrss_plugin_storage
 325                                         (name,owner_uid,content) VALUES
 326                                         ('$plugin','".$this->owner_uid."','$content')");
 327                         }
 328
 329                         $this->dbh->query("COMMIT");
 330                 }
 331         }
 332
 333         function set($sender, $name, $value, $sync = true) {
 334                 $idx = get_class($sender);
 335
 336                 if (!isset($this->storage[$idx]))
 337                         $this->storage[$idx] = array();
 338
 339                 $this->storage[$idx][$name] = $value;
 340
 341                 if ($sync) $this->save_data(get_class($sender));
 342         }
 343
 344         function get($sender, $name, $default_value = false) {
 345                 $idx = get_class($sender);
 346
 347                 if (isset($this->storage[$idx][$name])) {
 348                         return $this->storage[$idx][$name];
 349                 } else {
 350                         return $default_value;
 351                 }
 352         }
 353
 354         function get_all($sender) {
 355                 $idx = get_class($sender);
 356
 357                 return $this->storage[$idx];
 358         }
 359
 360         function clear_data($sender) {
 361                 if ($this->owner_uid) {
 362                         $idx = get_class($sender);
 363
 364                         unset($this->storage[$idx]);
 365
 366                         $this->dbh->query("DELETE FROM ttrss_plugin_storage WHERE name = '$idx'
 367                                 AND owner_uid = " . $this->owner_uid);
 368                 }
 369         }
 370
 371         function set_debug($debug) {
 372                 $this->debug = $debug;
 373         }
 374
 375         function get_debug() {
 376                 return $this->debug;
 377         }
 378
 379         // Plugin feed functions are *EXPERIMENTAL*!
 380
 381         // cat_id: only -1 is supported (Special)
 382         function add_feed($cat_id, $title, $icon, $sender) {
 383                 if (!$this->feeds[$cat_id]) $this->feeds[$cat_id] = array();
 384
 385                 $id = count($this->feeds[$cat_id]);
 386
 387                 array_push($this->feeds[$cat_id],
 388                         array('id' => $id, 'title' => $title, 'sender' => $sender, 'icon' => $icon));
 389
 390                 return $id;
 391         }
 392
 393         function get_feeds($cat_id) {
 394                 return $this->feeds[$cat_id];
 395         }
 396
 397         // convert feed_id (e.g. -129) to pfeed_id first
 398         function get_feed_handler($pfeed_id) {
 399                 foreach ($this->feeds as $cat) {
 400                         foreach ($cat as $feed) {
 401                                 if ($feed['id'] == $pfeed_id) {
 402                                         return $feed['sender'];
 403                                 }
 404                         }
 405                 }
 406         }
 407
 408         static function pfeed_to_feed_id($label) {
 409                 return PLUGIN_FEED_BASE_INDEX - 1 - abs($label);
 410         }
 411
 412         static function feed_to_pfeed_id($feed) {
 413                 return PLUGIN_FEED_BASE_INDEX - 1 + abs($feed);
 414         }
 415
 416         function add_api_method($name, $sender) {
 417                 if ($this->is_system($sender)) {
 418                         $this->api_methods[strtolower($name)] = $sender;
 419                 }
 420         }
 421
 422         function get_api_method($name) {
 423                 return $this->api_methods[$name];
 424         }
 425
 426         function add_filter_action($sender, $action_name, $action_desc) {
 427                 $sender_class = get_class($sender);
 428
 429                 if (!isset($this->plugin_actions[$sender_class]))
 430                         $this->plugin_actions[$sender_class] = array();
 431
 432                 array_push($this->plugin_actions[$sender_class],
 433                         array("action" => $action_name, "description" => $action_desc, "sender" => $sender));
 434         }
 435
 436         function get_filter_actions() {
 437                 return $this->plugin_actions;
 438         }
 439 }