[POC] datatable as a component for multiple cruds

src/Backpack.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace Backpack\CRUD;
+
+use Illuminate\Support\Facades\Facade;
+
+/**
+ * @see BackpackManager
+ */
+class Backpack extends Facade
+{
+    protected static function getFacadeAccessor()
+    {
+        return 'backpack-manager';
+    }
+}

src/BackpackManager.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace Backpack\CRUD;
+
+use Backpack\CRUD\app\Http\Controllers\Contracts\CrudControllerContract;
+use Backpack\CRUD\app\Library\CrudPanel\CrudPanel;
+
+final class BackpackManager
+{
+    private array $cruds;
+
+    public function crud(CrudControllerContract $controller): CrudPanel
+    {
+        $controllerClass = get_class($controller);
+
+        if (isset($this->cruds[$controllerClass])) {
+            return $this->cruds[$controllerClass];
+        }
+
+        $instance = new CrudPanel();
+
+        $this->cruds[$controllerClass] = $instance;
+
+        return $this->cruds[$controllerClass];
+    }
+
+    public function crudFromController(string $controller): CrudPanel
+    {
+        $controller = new $controller();
+
+        $crud = $this->crud($controller);
+
+        // TODO: it's hardcoded, but we should figure out a way to make it dynamic if needed.
+        $crud->setOperation('list');
+
+        $primaryControllerRequest = $this->cruds[array_key_first($this->cruds)]->getRequest();
+
+        $controller->initializeCrud($primaryControllerRequest, 'list');
+
+        return $this->cruds[get_class($controller)];
+    }
+
+    public function hasCrudController(string $controller): bool
+    {
+        return isset($this->cruds[$controller]);
+    }
+
+    public function getControllerCrud(string $controller): CrudPanel
+    {
+        return $this->cruds[$controller];
+    }
+}

src/BackpackServiceProvider.php

@@ -7,6 +7,7 @@
 use Backpack\CRUD\app\Http\Middleware\ThrottlePasswordRecovery;
 use Backpack\CRUD\app\Library\CrudPanel\CrudPanel;
 use Backpack\CRUD\app\Library\Database\DatabaseSchema;
+use Backpack\CRUD\app\Library\Datatable\Datatable;
 use Backpack\CRUD\app\Library\Uploaders\Support\UploadersRepository;
 use Illuminate\Contracts\Debug\ExceptionHandler;
 use Illuminate\Routing\Router;
@@ -63,6 +64,7 @@ public function boot(Router $router)
         $this->sendUsageStats();
 
         Basset::addViewPath(realpath(__DIR__.'/resources/views'));
+        Blade::component('datatable', Datatable::class);
     }
 
     /**
@@ -83,8 +85,25 @@ public function register()
         $this->registerBackpackErrorViews();
 
         // Bind the CrudPanel object to Laravel's service container
-        $this->app->scoped('crud', function ($app) {
-            return new CrudPanel();
+        $this->app->bind('crud', function ($app) {
+            // loop the stack trace to find the CrudControllerContract that called this method
+            $trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
+            $controller = null;
+            foreach ($trace as $step) {
+                if (isset($step['class']) && is_a($step['class'], app\Http\Controllers\Contracts\CrudControllerContract::class, true)) {
+                    $controller = $step['class'];
+                    break;
+                }
+            }
+            if (! $controller) {
+                throw new \Exception('Could not identify the crud controller method. You sure you are calling this from a CrudController?');
+            }
+
+            return Backpack::getControllerCrud($controller);
+        });
+
+        $this->app->scoped('backpack-manager', function ($app) {
+            return new BackpackManager();
         });
 
         $this->app->scoped('DatabaseSchema', function ($app) {
@@ -329,7 +348,7 @@ public function loadHelpers()
      */
     public function provides()
     {
-        return ['crud', 'widgets', 'BackpackViewNamespaces', 'DatabaseSchema', 'UploadersRepository'];
+        return ['widgets', 'BackpackViewNamespaces', 'DatabaseSchema', 'UploadersRepository'];
     }
 
     private function registerBackpackErrorViews()

src/app/Http/Controllers/Contracts/CrudControllerContract.php

@@ -0,0 +1,7 @@
+<?php
+
+namespace Backpack\CRUD\app\Http\Controllers\Contracts;
+
+interface CrudControllerContract
+{
+}

src/app/Http/Controllers/CrudController.php

@@ -2,7 +2,9 @@
 
 namespace Backpack\CRUD\app\Http\Controllers;
 
+use Backpack\CRUD\app\Http\Controllers\Contracts\CrudControllerContract;
 use Backpack\CRUD\app\Library\Attributes\DeprecatedIgnoreOnRuntime;
+use Backpack\CRUD\Backpack;
 use Illuminate\Foundation\Bus\DispatchesJobs;
 use Illuminate\Foundation\Validation\ValidatesRequests;
 use Illuminate\Routing\Controller;
@@ -14,19 +16,16 @@
  * @property-read \Backpack\CRUD\app\Library\CrudPanel\CrudPanel $crud
  * @property array $data
  */
-class CrudController extends Controller
+class CrudController extends Controller implements CrudControllerContract
 {
     use DispatchesJobs, ValidatesRequests;
 
-    public $crud;
+    //public $crud;
+
     public $data = [];
 
     public function __construct()
     {
-        if ($this->crud) {
-            return;
-        }
-
         // ---------------------------
         // Create the CrudPanel object
         // ---------------------------
@@ -36,18 +35,22 @@ public function __construct()
         // It's done inside a middleware closure in order to have
         // the complete request inside the CrudPanel object.
         $this->middleware(function ($request, $next) {
-            $this->crud = app('crud');
-
-            $this->crud->setRequest($request);
-
-            $this->setupDefaults();
-            $this->setup();
-            $this->setupConfigurationForCurrentOperation();
+            if (! Backpack::hasCrudController(get_class($this))) {
+                $this->initializeCrud($request);
+            }
 
             return $next($request);
         });
     }
 
+    public function initializeCrud($request, $operation = null)
+    {
+        Backpack::crud($this)->setRequest($request);
+        $this->setupDefaults();
+        $this->setup();
+        $this->setupConfigurationForCurrentOperation($operation);
+    }
+
     /**
      * Allow developers to set their configuration options for a CrudPanel.
      */
@@ -97,9 +100,9 @@ protected function setupDefaults()
      * Allow developers to insert default settings by creating a method
      * that looks like setupOperationNameOperation (aka setupXxxOperation).
      */
-    protected function setupConfigurationForCurrentOperation()
+    protected function setupConfigurationForCurrentOperation(?string $operation = null)
     {
-        $operationName = $this->crud->getCurrentOperation();
+        $operationName = $operation ?? $this->crud->getCurrentOperation();
         if (! $operationName) {
             return;
         }
@@ -125,4 +128,13 @@ protected function setupConfigurationForCurrentOperation()
             $this->{$setupClassName}();
         }
     }
+
+    public function __get($name)
+    {
+        if ($name == 'crud') {
+            return Backpack::getControllerCrud(get_class($this));
+        }
+
+        return $this->{$name};
+    }
 }

src/app/Library/CrudPanel/CrudButton.php

@@ -2,6 +2,8 @@
 
 namespace Backpack\CRUD\app\Library\CrudPanel;
 
+use Backpack\CRUD\app\Http\Controllers\CrudController;
+use Backpack\CRUD\Backpack;
 use Backpack\CRUD\ViewNamespaces;
 use Illuminate\Contracts\Support\Arrayable;
 use Illuminate\Support\Traits\Conditionable;
@@ -297,10 +299,10 @@ public function section($stack)
      * @param  object|null  $entry  The eloquent Model for the current entry or null if no current entry.
      * @return \Illuminate\Contracts\View\View
      */
-    public function getHtml($entry = null)
+    public function getHtml($entry = null, $crud = null)
     {
         $button = $this;
-        $crud = $this->crud();
+        $crud = $crud ?? $this->crud();
 
         if ($this->type == 'model_function') {
             if (is_null($entry)) {
@@ -434,7 +436,7 @@ public function collection()
     /**
      * Access the global CrudPanel object.
      *
-     * @return \Backpack\CRUD\app\Library\CrudPanel\CrudPanel
+     * @return CrudPanel
      */
     public function crud()
     {

src/app/Library/CrudPanel/CrudPanel.php

@@ -68,21 +68,18 @@ class CrudPanel
 
     public function __construct()
     {
-        $this->setRequest();
-
-        if ($this->getCurrentOperation()) {
-            $this->setOperation($this->getCurrentOperation());
-        }
     }
 
     /**
      * Set the request instance for this CRUD.
      *
      * @param  \Illuminate\Http\Request  $request
      */
-    public function setRequest($request = null)
+    public function setRequest($request = null): self
     {
         $this->request = $request ?? \Request::instance();
+
+        return $this;
     }
 
     /**

src/app/Library/Datatable/Datatable.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Backpack\CRUD\app\Library\Datatable;
+
+use Backpack\CRUD\app\Library\CrudPanel\CrudPanel;
+use Illuminate\View\Component;
+
+class Datatable extends Component
+{
+    public function __construct(private CrudPanel $crud)
+    {
+    }
+
+    public function render()
+    {
+        return view('crud::datatable.datatable', [
+            'crud' => $this->crud,
+        ]);
+    }
+}

src/resources/views/crud/columns/crud_column.blade.php

@@ -0,0 +1,5 @@
+@php
+$columnCrud = \Backpack\CRUD\Backpack::crudFromController($column['controller']);
+@endphp
+
+<x-datatable :crud="$columnCrud" />