plugin refactoring continues

lib/Doctrine/Plugin.php

@@ -98,7 +98,65 @@ class Doctrine_Plugin
     {
         return $this->_options;
     }
-    
+    /**
+     * generates foreign keys for the plugin table based on the owner table
+     *
+     * the foreign keys generated by this method can be used for 
+     * setting the relations between the owner and the plugin classes
+     *
+     * @param Doctrine_Table $table     the table object that owns the plugin
+     * @return array                    an array of foreign key definitions
+     */
+    public function generateForeignKeys(Doctrine_Table $table)
+    {
+        $fk = array();
+
+        foreach ((array) $table->getIdentifier() as $column) {
+            $def = $table->getDefinitionOf($column);
+
+            unset($def['autoincrement']);
+            unset($def['sequence']);
+            unset($def['primary']);
+
+            $col = strtolower(Doctrine::tableize($table->getComponentName()) . '_' . $column);
+
+            $def['primary'] = true;
+            $fk[$col] = $def;
+        }
+        return $fk;
+    }
+    /**
+     * generates a relation array to given table
+     *
+     * this method can be used for generating the relation from the plugin 
+     * table to the owner table
+     *
+     * @param Doctrine_Table $table     the table object to construct the relation to
+     * @param array $foreignKeys        an array of foreign keys
+     * @return array                    the generated relation array
+     */
+    public function generateRelation(Doctrine_Table $table, array $foreignKeys)
+    {
+        $local = (count($foreignKeys) > 1) ? array_keys($foreignKeys) : key($foreignKeys);
+        
+        $relation = array($table->getComponentName() => 
+                        array('local'    => $local,
+                              'foreign'  => $table->getIdentifier(),
+                              'onDelete' => 'CASCADE',
+                              'onUpdate' => 'CASCADE'));
+
+        return $relation;
+    }
+    /**
+     * generates the class definition for plugin class
+     *
+     * @param array $options    plugin class options, keys representing the option names 
+     *                          and values as option values
+     * @param array $columns    the plugin class columns, keys representing the column names
+     *                          and values as column definitions
+     * @param array $relations  the bound relations of the plugin class
+     * @return void
+     */
     public function generateClass($options, $columns, $relations)
     {
         $builder = new Doctrine_Import_Builder();