classes/pluginhost.php

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