create factory modifiers

src/Illuminate/Database/Eloquent/Factory.php

@@ -33,6 +33,13 @@ public function __construct(Faker $faker)
      */
     protected $definitions = [];
 
+    /**
+     * The model modifiers in the container.
+     *
+     * @var array
+     */
+    protected $modifiers = [];
+
     /**
      * Create a new factory container.
      *
@@ -73,6 +80,19 @@ public function define($class, callable $attributes, $name = 'default')
         $this->definitions[$class][$name] = $attributes;
     }
 
+    /**
+     * Define a modifier with a given set of attributes.
+     *
+     * @param  string  $class
+     * @param  string  $name
+     * @param  callable  $attributes
+     * @return void
+     */
+    public function defineModifier($class, $name, callable $attributes)
+    {
+        $this->modifiers[$class][$name] = $attributes;
+    }
+
     /**
      * Create an instance of the given model and persist it to the database.
      *
@@ -179,7 +199,7 @@ public function raw($class, array $attributes = [], $name = 'default')
      */
     public function of($class, $name = 'default')
     {
-        return new FactoryBuilder($class, $name, $this->definitions, $this->faker);
+        return new FactoryBuilder($class, $name, $this->definitions, $this->faker, $this->modifiers);
     }
 
     /**

src/Illuminate/Database/Eloquent/FactoryBuilder.php

@@ -15,6 +15,13 @@ class FactoryBuilder
      */
     protected $definitions;
 
+    /**
+     * The model modifiers in the container.
+     *
+     * @var array
+     */
+    protected $modifiers;
+
     /**
      * The model being built.
      *
@@ -36,6 +43,13 @@ class FactoryBuilder
      */
     protected $amount = 1;
 
+    /**
+     * The modifiers to apply.
+     *
+     * @var array
+     */
+    protected $activeModifiers = [];
+
     /**
      * The Faker instance for the builder.
      *
@@ -50,14 +64,16 @@ class FactoryBuilder
      * @param  string  $name
      * @param  array  $definitions
      * @param  \Faker\Generator  $faker
+     * @param  array  $modifiers
      * @return void
      */
-    public function __construct($class, $name, array $definitions, Faker $faker)
+    public function __construct($class, $name, array $definitions, Faker $faker, array $modifiers)
     {
         $this->name = $name;
         $this->class = $class;
         $this->faker = $faker;
         $this->definitions = $definitions;
+        $this->modifiers = $modifiers;
     }
 
     /**
@@ -73,6 +89,23 @@ public function times($amount)
         return $this;
     }
 
+    /**
+     * Set the active modifiers.
+     *
+     * @param  array|string  $modifiers
+     * @return $this
+     */
+    public function modifiers($modifiers)
+    {
+        if(is_string($modifiers)){
+            $modifiers = [$modifiers];
+        }
+
+        $this->activeModifiers = $modifiers;
+
+        return $this;
+    }
+
     /**
      * Create a collection of models and persist them to the database.
      *
@@ -135,6 +168,19 @@ protected function makeInstance(array $attributes = [])
                 $this->faker, $attributes
             );
 
+            foreach($this->activeModifiers as $activeModifier){
+                if( ! isset($this->modifiers[$this->class][$activeModifier])) {
+                    throw new InvalidArgumentException("Unable to locate factory modifier with name [{$activeModifier}] [{$this->class}].");
+                }
+
+                $modifier = call_user_func(
+                    $this->modifiers[$this->class][$activeModifier],
+                    $this->faker, $attributes
+                );
+
+                $definition = array_merge($definition, $modifier);
+            }
+
             $evaluated = $this->callClosureAttributes(
                 array_merge($definition, $attributes)
             );