[1.x] Allow any driver to opt-in to cache flushing (#131)

* [1.x] Allow any driver to opt-in to cache flushing

* rename interface

---------

Co-authored-by: Taylor Otwell <[email protected]>

src/Contracts/HasFlushableCache.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace Laravel\Pennant\Contracts;
+
+interface HasFlushableCache
+{
+    /**
+     * Flush the cache.
+     *
+     * @return void
+     */
+    public function flushCache();
+}

src/Drivers/ArrayDriver.php

@@ -6,11 +6,12 @@
 use Illuminate\Support\Collection;
 use Laravel\Pennant\Contracts\CanListStoredFeatures;
 use Laravel\Pennant\Contracts\Driver;
+use Laravel\Pennant\Contracts\HasFlushableCache;
 use Laravel\Pennant\Events\UnknownFeatureResolved;
 use Laravel\Pennant\Feature;
 use stdClass;
 
-class ArrayDriver implements CanListStoredFeatures, Driver
+class ArrayDriver implements CanListStoredFeatures, Driver, HasFlushableCache
 {
     /**
      * The event dispatcher.

src/Drivers/Decorator.php

@@ -13,6 +13,7 @@
 use Laravel\Pennant\Contracts\DefinesFeaturesExternally;
 use Laravel\Pennant\Contracts\Driver;
 use Laravel\Pennant\Contracts\FeatureScopeable;
+use Laravel\Pennant\Contracts\HasFlushableCache;
 use Laravel\Pennant\Events\AllFeaturesPurged;
 use Laravel\Pennant\Events\DynamicallyRegisteringFeatureClass;
 use Laravel\Pennant\Events\FeatureDeleted;
@@ -36,7 +37,7 @@
 /**
  * @mixin \Laravel\Pennant\PendingScopedFeatureInteraction
  */
-class Decorator implements CanListStoredFeatures, Driver
+class Decorator implements CanListStoredFeatures, Driver, HasFlushableCache
 {
     use Macroable {
         __call as macroCall;
@@ -801,6 +802,10 @@ protected function defaultScope()
     public function flushCache()
     {
         $this->cache = new Collection;
+
+        if ($this->driver instanceof HasFlushableCache) {
+            $this->driver->flushCache();
+        }
     }
 
     /**

src/FeatureManager.php

@@ -217,10 +217,6 @@ public function flushCache()
         foreach ($this->stores as $driver) {
             $driver->flushCache();
         }
-
-        if (isset($this->stores['array'])) {
-            $this->stores['array']->getDriver()->flushCache();
-        }
     }
 
     /**