1 files changed, 164 insertions, 0 deletions
diff --git a/core/modules.inc.php b/core/modules.inc.php
new file mode 100644
index 0000000..c1ebc80
--- /dev/null
+++ b/core/modules.inc.php
@@ -0,0 +1,164 @@
+<?PHP
+  require_once('core/xmlparser.inc.php');
+  require_once('core/db.inc.php');
+  
+  function Uses() {
+    foreach(func_get_args() as $file) {
+      if(isset($GLOBALS['modules']->code[$file]))
+        require_once($GLOBALS['modules']->code[$file]['path'] . 'code/' . $file . '.inc.php');
+      else
+        die('Fatal: a required code file was not found.');
+    }
+  }
+  
+  class Modules {
+    var $modules = array();
+    var $pages = array();
+    var $code = array();
+    var $templates = array();
+    
+    function Modules() {
+      $module = $this->Load('base.xml');
+      if(!$module) die('Fatal: could not load Neon base.');
+      
+      $module['path'] = '';
+      
+      $this->modules['base'] = $module;
+      
+      
+      $dir = opendir('modules');
+      
+      while($moddir = readdir($dir)) {
+        if($moddir[0] == '.' || !is_dir('modules/' . $moddir) || !is_file('modules/' . $moddir . '/module.xml'))
+          continue;
+        
+        $module = $this->Load('modules/' . $moddir . '/module.xml');
+        
+        if(!$module) continue;
+        
+        $module['path'] = 'modules/' . $moddir . '/';
+        $this->modules[$module['name']] = $module;
+      }
+      
+      closedir($dir);
+      
+      $res = $GLOBALS['db']->Execute('SELECT name, enabled FROM modules');
+      
+      $row[0] = 'base';
+      $row[1] = 1;
+      
+      do {
+        if(!array_key_exists($row[0], $this->modules)) {
+          $GLOBALS['db']->Execute('DELETE FROM modules WHERE name = ?', $row[0]);
+          continue;
+        }
+        
+        if(!$row[1]) continue;
+        
+        $this->modules[$row[0]]['enabled'] = true;
+        
+        foreach($this->modules[$row[0]]['pages'] as $page)
+          $this->pages[$page] = &$this->modules[$row[0]];
+        foreach($this->modules[$row[0]]['code'] as $code)
+          $this->code[$code] = &$this->modules[$row[0]];
+        foreach($this->modules[$row[0]]['templates'] as $template)
+          $this->templates[$template] = &$this->modules[$row[0]];
+      } while($row = $res->FetchRow());
+    }
+    
+    function Load($file) {
+      if(!is_file($file)) return null;
+      
+      $data = $GLOBALS['xmlparser']->ParseFile($file);
+      if(!$data) return null;
+      
+      $info = $GLOBALS['xmlparser']->FindTag($data, 'info');
+      if(!$info) return null;
+      
+      $name = $GLOBALS['xmlparser']->FindTag($info, 'name');
+      if(!$name) return null;
+      if(count($name['children']) != 1) return null;
+      if(!is_string($name['children'][0])) return null;
+      $name = $name['children'][0];
+      
+      $version = $GLOBALS['xmlparser']->FindTag($info, 'version');
+      if(!$version) return null;
+      if(count($version['children']) != 1) return null;
+      if(!is_string($version['children'][0])) return null;
+      $version = $version['children'][0];
+      
+      $desc = $GLOBALS['xmlparser']->FindTag($info, 'desc');
+      if($desc && (count($desc['children']) == 1) && is_string($desc['children'][0])) $desc = $desc['children'][0];
+      else $desc = '';
+      
+      
+      $module = array('name' => $name, 'version' => $version, 'desc' => $desc, 'code' => array(),
+                      'pages' => array(), 'templates' => array(), 'config' => false, 'enabled' => false);
+      
+      if($GLOBALS['xmlparser']->FindTag($info, 'config')) $module['config'] = true;
+      
+      $files = $GLOBALS['xmlparser']->FindTag($data, 'files');
+      if(!$files) return $module;
+      
+      foreach($files['children'] as $file) {
+        if(!is_array($file)) continue;
+        if(count($file['children']) != 1) continue;
+        if(!is_string($file['children'][0])) continue;
+        
+        switch($file['tag']) {
+          case 'page':
+            $type = $file['attribs']['type'];
+            if(!$type) $type = 'c';
+            
+            array_push($module['pages'], $file['children'][0] . '.' . $type);
+            break;
+          case 'code':
+            array_push($module['code'], $file['children'][0]);
+            break;
+          case 'template':
+            array_push($module['templates'], $file['children'][0]);
+        }
+      }
+      
+      return $module;
+    }
+    
+    function Exists($name) {
+      return array_key_exists($name, $this->modules);
+    }
+    
+    function Enabled($name) {
+      return $this->Exists($name) && $this->modules[$name]['enabled'];
+    }
+    
+    function HasConfig($name) {
+      if(!$this->Exists($name)) return false;
+      
+      return $this->modules[$name]['config'];
+    }
+    
+    function Enable($name, $enable = true) {
+      if(!$this->Exists($name)) return false;
+      
+      if($this->Enabled($name) == $enable) return true;
+      
+      $res = $GLOBALS['db']->Execute('SELECT id FROM modules WHERE name = ?', $name);
+      
+      if($res->RecordCount()) {
+        $GLOBALS['db']->Execute('UPDATE modules SET enabled = ? WHERE name = ?', array(intval($enable), $name));
+      
+        return ($GLOBALS['db']->Affected_Rows() > 0);
+      }
+      
+      $GLOBALS['db']->Execute('INSERT INTO modules (name, enabled) VALUES (?, ?)', array($name, intval($enable)));
+      
+      return ($GLOBALS['db']->Affected_Rows() > 0);
+    }
+    
+    function Disable($name) {
+      return $this->Enable($name, false);
+    }
+  }
+  
+  $GLOBALS['modules'] = new Modules;
+?>