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