Merge pull request #2800 from yajra/di

[10.x] Add support for dependency injection when using closure.

Author: yajra

src/Utilities/Helper.php

@@ -2,10 +2,12 @@
 
 namespace Yajra\DataTables\Utilities;
 
+use Closure;
 use DateTime;
 use Illuminate\Contracts\Support\Arrayable;
 use Illuminate\Support\Arr;
 use Illuminate\Support\Str;
+use ReflectionFunction;
 
 class Helper
 {
@@ -58,12 +60,23 @@ protected static function isItemOrderInvalid($item, $array)
      * @param  array  $data  data to use with blade template
      * @param  array|object  $param  parameter to call with callable
      * @return mixed
+     *
+     * @throws \ReflectionException
      */
     public static function compileContent($content, array $data, array|object $param)
     {
         if (is_string($content)) {
             return static::compileBlade($content, static::getMixedValue($data, $param));
-        } elseif (is_callable($content)) {
+        }
+
+        if ($content instanceof Closure) {
+            $reflection = new ReflectionFunction($content);
+            $arguments = $reflection->getParameters();
+
+            if (count($arguments) > 0) {
+                return app()->call($content, [$arguments[0]->name => $param]);
+            }
+
             return $content($param);
         }
 

tests/Integration/QueryDataTableTest.php

@@ -339,6 +339,26 @@ public function it_can_return_formatted_columns()
         $this->assertEquals(Carbon::parse($user->created_at)->format('Y-m-d'), $data['created_at_formatted']);
     }
 
+    /** @test */
+    public function it_can_return_added_column_with_dependency_injection()
+    {
+        $crawler = $this->call('GET', '/closure-di');
+
+        $crawler->assertJson([
+            'draw' => 0,
+            'recordsTotal' => 20,
+            'recordsFiltered' => 20,
+        ]);
+
+        $user = DB::table('users')->find(1);
+        $data = $crawler->json('data')[0];
+
+        $this->assertTrue(isset($data['name']));
+        $this->assertTrue(isset($data['name_di']));
+
+        $this->assertEquals($user->name.'_di', $data['name_di']);
+    }
+
     protected function setUp(): void
     {
         parent::setUp();
@@ -451,5 +471,13 @@ protected function setUp(): void
                              ->setFilteredRecords(10)
                              ->toJson();
         });
+
+        $router->get('/closure-di', function (DataTables $dataTable) {
+            return $dataTable->query(DB::table('users'))
+                             ->addColumn('name_di', function ($user, User $u) {
+                                 return $u->newQuery()->find($user->id)->name.'_di';
+                             })
+                             ->toJson();
+        });
     }
 }