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 $commands = array();
   8
   9         const HOOK_ARTICLE_BUTTON = 1;
  10         const HOOK_ARTICLE_FILTER = 2;
  11         const HOOK_PREFS_TAB = 3;
  12         const HOOK_PREFS_SECTION = 4;
  13         const HOOK_PREFS_TABS = 5;
  14         const HOOK_FEED_PARSED = 6;
  15         const HOOK_UPDATE_TASK = 7;
  16
  17         function __construct($link) {
  18                 $this->link = $link;
  19         }
  20
  21         private function register_plugin($name, $plugin) {
  22                 //array_push($this->plugins, $plugin);
  23                 $this->plugins[$name] = $plugin;
  24         }
  25
  26         function get_link() {
  27                 return $this->link;
  28         }
  29
  30         function get_plugins() {
  31                 return $this->plugins;
  32         }
  33
  34         function get_plugin($name) {
  35                 return $this->plugins[$name];
  36         }
  37
  38         function run_hooks($type, $method, $args) {
  39                 foreach ($this->get_hooks($type) as $hook) {
  40                         $hook->$method($args);
  41                 }
  42         }
  43
  44         function add_hook($type, $sender) {
  45                 if (!is_array($this->hooks[$type])) {
  46                         $this->hooks[$type] = array();
  47                 }
  48
  49                 array_push($this->hooks[$type], $sender);
  50         }
  51
  52         function del_hook($type, $sender) {
  53                 if (is_array($this->hooks[$type])) {
  54                         $key = array_Search($this->hooks[$type], $sender);
  55                         if ($key !== FALSE) {
  56                                 unset($this->hooks[$type][$key]);
  57                         }
  58                 }
  59         }
  60
  61         function get_hooks($type) {
  62                 if (isset($this->hooks[$type])) {
  63                         return $this->hooks[$type];
  64                 } else {
  65                         return array();
  66                 }
  67         }
  68
  69         function load($classlist) {
  70                 $plugins = explode(",", $classlist);
  71
  72                 foreach ($plugins as $class) {
  73                         $class = trim($class);
  74                         $class_file = strtolower(basename($class));
  75                         $file = dirname(__FILE__)."/../plugins/$class_file/$class_file.php";
  76
  77                         if (file_exists($file)) require_once $file;
  78
  79                         if (class_exists($class) && is_subclass_of($class, "Plugin")) {
  80                                 $plugin = new $class($this);
  81
  82                                 $this->register_plugin($class, $plugin);
  83                         }
  84                 }
  85         }
  86
  87         function add_handler($handler, $method, $sender) {
  88                 $handler = str_replace("-", "_", strtolower($handler));
  89                 $method = strtolower($method);
  90
  91                 if (!is_array($this->handlers[$handler])) {
  92                         $this->handlers[$handler] = array();
  93                 }
  94
  95                 $this->handlers[$handler][$method] = $sender;
  96         }
  97
  98         function del_handler($handler, $method) {
  99                 $handler = str_replace("-", "_", strtolower($handler));
 100                 $method = strtolower($method);
 101
 102                 unset($this->handlers[$handler][$method]);
 103         }
 104
 105         function lookup_handler($handler, $method) {
 106                 $handler = str_replace("-", "_", strtolower($handler));
 107                 $method = strtolower($method);
 108
 109                 if (is_array($this->handlers[$handler])) {
 110                         if (isset($this->handlers[$handler]["*"])) {
 111                                 return $this->handlers[$handler]["*"];
 112                         } else {
 113                                 return $this->handlers[$handler][$method];
 114                         }
 115                 }
 116
 117                 return false;
 118         }
 119
 120         function add_command($command, $description, $sender) {
 121                 $command = "-" . str_replace("-", "_", strtolower($command));
 122
 123                 $this->commands[$command] = array("description" => $description,
 124                         "class" => $sender);
 125         }
 126
 127         function del_command($command) {
 128                 $command = "-" . strtolower($command);
 129
 130                 unset($this->commands[$command]);
 131         }
 132
 133         function lookup_command($command) {
 134                 $command = "-" . strtolower($command);
 135
 136                 if (is_array($this->commands[$command])) {
 137                         return $this->commands[$command]["class"];
 138                 } else {
 139                         return false;
 140                 }
 141
 142                 return false;
 143         }
 144
 145         function get_commands() {
 146                 return $this->commands;
 147         }
 148
 149         function run_commands($args) {
 150                 foreach ($this->get_commands() as $command => $data) {
 151                         if (in_array($command, $args)) {
 152                                 $command = str_replace("-", "", $command);
 153                                 $data["class"]->$command($args);
 154                         }
 155                 }
 156         }
 157
 158 }
 159 ?>