if a model implements interfaces, include them in the stub

src/Console/ModelsCommand.php

@@ -660,6 +660,10 @@ class ModelsCommand extends Command
         $classname = $reflection->getShortName();
         $originalDoc = $reflection->getDocComment();
         $keyword = $this->getClassKeyword($reflection);
+        $interfaceNames = array_diff_key(
+            $reflection->getInterfaceNames(),
+            $reflection->getParentClass()->getInterfaceNames()
+        );
 
         if ($this->reset) {
             $phpdoc = new DocBlock('', new Context($namespace));
@@ -748,8 +752,14 @@ class ModelsCommand extends Command
             }
         }
 
-        $output = "namespace {$namespace}{\n{$docComment}\n\t{$keyword}class {$classname} extends \Eloquent {}\n}\n\n";
-        return $output;
+        $output = "namespace {$namespace}{\n{$docComment}\n\t{$keyword}class {$classname} extends \Eloquent ";
+
+        if ($interfaceNames) {
+            $interfaces = implode(', \\', $interfaceNames);
+            $output .= "implements \\{$interfaces} ";
+        }
+
+        return $output . "{}\n}\n\n";
     }
 
     /**

tests/Console/ModelsCommand/Interfaces/Models/User.php

@@ -0,0 +1,39 @@
+<?php declare(strict_types=1);
+
+namespace Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Interfaces\Models;
+
+use Illuminate\Contracts\Auth\Authenticatable;
+use Illuminate\Database\Eloquent\Model;
+
+class User extends Model implements Authenticatable
+{
+    public function getAuthIdentifierName()
+    {
+        // TODO: Implement getAuthIdentifierName() method.
+    }
+
+    public function getAuthIdentifier()
+    {
+        // TODO: Implement getAuthIdentifier() method.
+    }
+
+    public function getAuthPassword()
+    {
+        // TODO: Implement getAuthPassword() method.
+    }
+
+    public function getRememberToken()
+    {
+        // TODO: Implement getRememberToken() method.
+    }
+
+    public function setRememberToken($value)
+    {
+        // TODO: Implement setRememberToken() method.
+    }
+
+    public function getRememberTokenName()
+    {
+        // TODO: Implement getRememberTokenName() method.
+    }
+}

tests/Console/ModelsCommand/Interfaces/Test.php

@@ -0,0 +1,79 @@
+<?php declare(strict_types=1);
+
+namespace Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Interfaces;
+
+use Barryvdh\LaravelIdeHelper\Console\ModelsCommand;
+use Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\AbstractModelsCommand;
+use Illuminate\Filesystem\Filesystem;
+use Mockery;
+
+final class Test extends AbstractModelsCommand
+{
+    protected function getEnvironmentSetUp($app)
+    {
+        parent::getEnvironmentSetUp($app);
+
+        $app['config']->set('ide-helper', [
+            'model_locations' => [
+                // This is calculated from the base_path() which points to
+                // vendor/orchestra/testbench-core/laravel
+                '/../../../../tests/Console/ModelsCommand/Interfaces/Models',
+            ],
+        ]);
+    }
+
+    public function test(): void
+    {
+        $actualContent = null;
+        $mockFilesystem = Mockery::mock(Filesystem::class);
+
+        $mockFilesystem
+            ->shouldReceive('put')
+            ->with(
+                Mockery::any(),
+                Mockery::capture($actualContent)
+            )
+            ->andReturn(1) // Simulate we wrote _something_ to the file
+            ->once();
+
+        $this->instance(Filesystem::class, $mockFilesystem);
+
+        $command = $this->app->make(ModelsCommand::class);
+
+        $tester = $this->runCommand($command, [
+            '--nowrite' => true,
+        ]);
+
+        $this->assertSame(0, $tester->getStatusCode());
+        $this->assertEmpty($tester->getDisplay());
+
+        $expectedContent = <<<'PHP'
+<?php
+
+// @formatter:off
+/**
+ * A helper file for your Eloquent Models
+ * Copy the phpDocs from this file to the correct Model,
+ * And remove them from this file, to prevent double declarations.
+ *
+ * @author Barry vd. Heuvel <[email protected]>
+ */
+
+
+namespace Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Interfaces\Models{
+/**
+ * Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Interfaces\Models\User
+ *
+ * @method static \Illuminate\Database\Eloquent\Builder|\Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Interfaces\Models\User newModelQuery()
+ * @method static \Illuminate\Database\Eloquent\Builder|\Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Interfaces\Models\User newQuery()
+ * @method static \Illuminate\Database\Eloquent\Builder|\Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Interfaces\Models\User query()
+ */
+	class User extends \Eloquent implements \Illuminate\Contracts\Auth\Authenticatable {}
+}
+
+
+PHP;
+
+        $this->assertSame($expectedContent, $actualContent);
+    }
+}