List sub-classes of Model in path

src/Actions/AskModelName.php

@@ -18,7 +18,7 @@ public static function handle(): array
         {
             while (self::$model === '') {
                 self::setModel(suggest(
-                    label: 'Select a Model or enter its Name/FQN class.',
+                    label: 'Select a Model or enter its Fully qualified name.',
                     options: ListModels::handle(),
                     required: true,
                 ));

src/Actions/ListModels.php

@@ -9,22 +9,33 @@
 final class ListModels
 {
     /**
-     * List files in Models folder
+     * List files in Models
      *
      */
     public static function handle(): array
     {
-        $modelsFolder = app_path('Models');
+        $directories = config('livewire-powergrid.auto_discover_models_paths', [app_path('Models')]);
 
-        return collect(File::allFiles($modelsFolder))
+        /** @var Array<int,string> $directories */
+        return collect($directories)
+            ->filter(fn (string $directory) => File::exists($directory))
+            ->map(fn (string $directory) => File::allFiles($directory))
+            ->flatten()
             ->reject(fn (SplFileInfo $file): bool => $file->getExtension() != 'php')
-            ->map(function (SplFileInfo $file): array {
-                return [
-                    'file' => $file->getFilenameWithoutExtension(),
-                    'path' => 'App\\Models\\' . $file->getFilenameWithoutExtension(),
-                ];
+
+            // Get FQN Class from source code
+            /** @phpstan-ignore-next-line */
+            ->map(function (SplFileInfo $file): string {
+                $sourceCode = strval(file_get_contents($file->getPathname()));
+
+                return rescue(fn () => ParseFqnClassInCode::handle($sourceCode), '');
             })
-            ->flatten()
+            //Remove all unqualified PHP files code
+            ->filter()
+
+            // Remove classes that do not extend an Eloquent Model
+            /** @phpstan-ignore-next-line */
+            ->reject(fn (string $fqnClass) => rescue(fn () => (new \ReflectionClass($fqnClass))->isSubclassOf(\Illuminate\Database\Eloquent\Model::class), false) === false)
             ->toArray();
     }
 }

src/Actions/ParseFqnClassInCode.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace PowerComponents\LivewirePowerGrid\Actions;
+
+final class ParseFqnClassInCode
+{
+    /**
+     * Parse namespace from PHP source code
+     * Inspired by: https://gist.github.com/ludofleury/1886076
+     * @throws \Exception
+     */
+    public static function handle(string $sourceCode): string
+    {
+        if (preg_match('#^namespace\s+(.+?);.*class\s+(\w+).+;$#sm', $sourceCode, $matches)) {
+            return $matches[1] . '\\' . $matches[2];
+        }
+
+        throw new \Exception('could not find a FQN Class is source-code');
+    }
+}

tests/Feature/Actions/ListModelsTest.php

@@ -1,20 +1,28 @@
-<?php
 
-use Illuminate\Support\Facades\File;
+<?php
 
 use PowerComponents\LivewirePowerGrid\Actions\ListModels;
 
-beforeEach(function () {
-    File::cleanDirectory(base_path('app/Models'));
-
-    $this->artisan('make:model Demo');
-});
+it('list all Eloquent Models in a directory', function () {
+    app()->config->set('livewire-powergrid.auto_discover_models_paths', [
+        'tests/Concerns/Models',
+    ]);
 
-test('list models', function () {
     expect(ListModels::handle())->toBe(
         [
-            'Demo',
-            'App\Models\Demo',
+            'PowerComponents\LivewirePowerGrid\Tests\Concerns\Models\Category',
+            'PowerComponents\LivewirePowerGrid\Tests\Concerns\Models\Chef',
+            'PowerComponents\LivewirePowerGrid\Tests\Concerns\Models\Dish',
+            'PowerComponents\LivewirePowerGrid\Tests\Concerns\Models\Restaurant',
         ]
     );
 });
+
+it('will not list non-Eloquent Models', function () {
+    app()->config->set('livewire-powergrid.auto_discover_models_paths', [
+        'tests/Concerns/Enums', //There are no models in this directory.
+
+    ]);
+
+    expect(ListModels::handle())->toBe([]);
+});

tests/Feature/Actions/ParseFqnClassInCodeTest.php

@@ -0,0 +1,25 @@
+<?php
+
+use PowerComponents\LivewirePowerGrid\Actions\ParseFqnClassInCode;
+
+it('can find the namespace in a PHP file source code', function () {
+    $code = <<<EOD
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class DemoModel extends Model
+{
+    use HasFactory;
+}
+EOD;
+
+    expect(ParseFqnClassInCode::handle($code))->toBe('App\Models\DemoModel');
+});
+
+it('throws an exception when namespace cannot be found', function () {
+    ParseFqnClassInCode::handle('foobar');
+})->throws('could not find a FQN Class is source-code');