optional option to generate service with interface implementation

Author: silverhand7

src/Console/FileGenerable.php

@@ -19,7 +19,7 @@ protected function buildClass($name): string
                 ->replaceClass($stub, $name);
     }
 
-    protected function replaceClass(&$stub, $name): string
+    protected function replaceClass($stub, $name): string
     {
         $className = Str::replace($this->getNamespace($name).'\\', '', $name);
 

src/Console/ServiceMakeCommand.php

@@ -3,6 +3,7 @@
 namespace Silverhand7\LaravelArtisanMaker\Console;
 
 use Illuminate\Console\GeneratorCommand;
+use Illuminate\Support\Facades\Artisan;
 use Illuminate\Support\Str;
 
 class ServiceMakeCommand extends GeneratorCommand
@@ -26,13 +27,22 @@ protected function buildClass($name): string
             $interfaceName = $this->option('interface') ?? $this->option('i');
             $interfaceUseNamespace = config('artisan-maker.interface_namespace') . '\\' . $interfaceName;
 
+            if (!$this->checkInterfaceExists($interfaceUseNamespace)) {
+                if ($this->confirm('Interface does not exist, do you want to create one?', true)) {
+                    Artisan::call('make:interface', [
+                        'name' => $interfaceName
+                    ]);
+                }
+            }
+
+
             $stub = $this->files->get($this->getClassImplementInterfaceStub());
 
             return $this
-                ->replaceInterfaceUseNamespace($stub, $interfaceUseNamespace)
-                ->replaceInterfaceClass($stub, $interfaceName)
-                ->replaceNamespace($stub, $name)
-                ->replaceClass($stub, $name);
+                    ->replaceInterfaceUseNamespace($stub, $interfaceUseNamespace)
+                    ->replaceInterfaceClass($stub, $interfaceName)
+                    ->replaceNamespace($stub, $name)
+                    ->replaceClass($stub, $name);
         }
 
         $stub = $this->files->get($this->getStub());
@@ -53,4 +63,11 @@ protected function replaceInterfaceUseNamespace(&$stub, $interfaceUseNamespace)
         $stub = Str::replace("{{ interfaceUseNamespace }}", $interfaceUseNamespace, $stub);
         return $this;
     }
+
+    protected function checkInterfaceExists($interfaceUseNamespace): bool
+    {
+        $paths = explode('\\', $interfaceUseNamespace);
+        array_shift($paths);
+        return file_exists($this->laravel['path'] . '/' . implode('/', $paths) . '.php');
+    }
 }