Fallback route caching (#228)

config/rapidez.php

@@ -55,6 +55,13 @@
     // below will not be used anymore when disabled.
     'routes' => true,
 
+    'fallback_routes' => [
+        // How long (in seconds) it should cache which controller handles which route.
+        // null means cache forever, 0 means never cache. customisation is possible using a closure.
+        // This does not cache the response, it caches the controller used for that page.
+        'cache_duration' => 3600,
+    ],
+
     // Link store codes to theme folders
     // The structure is `'store_code' => 'folder_path'`
     'themes' => [

src/Http/Controllers/FallbackController.php

@@ -2,32 +2,58 @@
 
 namespace Rapidez\Core\Http\Controllers;
 
+use Exception;
 use Illuminate\Database\Eloquent\ModelNotFoundException;
 use Illuminate\Database\RecordsNotFoundException;
+use Illuminate\Http\Request;
 use Illuminate\Routing\Exceptions\BackedEnumCaseNotFoundException;
 use Illuminate\Support\Facades\App;
+use Illuminate\Support\Facades\Cache;
 use Rapidez\Core\Facades\Rapidez;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 use Symfony\Component\Routing\Exception\RouteNotFoundException;
 
 class FallbackController
 {
-    public function __invoke()
+    public function __invoke(Request $request)
     {
-        foreach (Rapidez::getAllFallbackRoutes() as $route) {
-            try {
-                $response = App::call($route['action']['uses']);
+        $cacheKey = 'fallbackroute-' . md5($request->url());
+        $route = Cache::get($cacheKey);
+        if($route && $response = $this->tryRoute($route)) {
+            return $response;
+        }
 
-                // Null response is equal to no response or 404.
-                if ($response === null) {
-                    abort(404);
-                }
+        foreach (Rapidez::getAllFallbackRoutes() as $route) {
+            if(!($response = $this->tryRoute($route))) {
+                continue;
+            }
 
-                return $response;
-            } catch (RouteNotFoundException|NotFoundHttpException|BackedEnumCaseNotFoundException|ModelNotFoundException|RecordsNotFoundException $e) {
+            try {
+                Cache::put($cacheKey, $route, value(config('rapidez.fallback_routes.cache_duration', 3600), $request, $response, $route));
+            } catch (Exception $e) {
+                // We can't cache it, no worries.
+                // Ususally a sign it's a direct callback or caching hasn't been configured properly.
             }
+
+            return $response;
         }
 
         abort(404);
     }
+
+    protected function tryRoute($route)
+    {
+        try {
+            $response = App::call($route['action']['uses']);
+
+            // Null response is equal to no response or 404.
+            if ($response === null) {
+                abort(404);
+            }
+
+            return $response;
+        } catch (RouteNotFoundException|NotFoundHttpException|BackedEnumCaseNotFoundException|ModelNotFoundException|RecordsNotFoundException $e) {
+            return null;
+        }
+    }
 }