Add directive @Bool to Blade (#53179)

* Add directive @Bool to Blade

Add @Bool directive functionality to Blade, allowing boolean values to be printed directly into strings or used in object construction.

* Fix @Bool suggestion

Fix errors that occours when a Falsey value like '0' is passed, also added a NULL and instance testing.

* continuous-integration

* Update BladeBoolTest.php

* Update BladeBoolTest.php

* Update CompilesConditionals.php

* Update CompilesConditionals.php

---------

Co-authored-by: Taylor Otwell <taylor@laravel.com>

src/Illuminate/View/Compilers/Concerns/CompilesConditionals.php

@@ -306,14 +306,14 @@ public function compileEndOnce()
     }
 
     /**
-     * Compile a selected block into valid PHP.
+     * Compile a boolean value into a raw true / false value for embedding into HTML attributes or JavaScript.
      *
-     * @param  string  $condition
+     * @param  bool  $condition
      * @return string
      */
-    protected function compileSelected($condition)
+    protected function compileBool($condition)
     {
-        return "<?php if{$condition}: echo 'selected'; endif; ?>";
+        return "<?php echo ($condition ? 'true' : 'false'); ?>";
     }
 
     /**
@@ -360,6 +360,17 @@ protected function compileReadonly($condition)
         return "<?php if{$condition}: echo 'readonly'; endif; ?>";
     }
 
+    /**
+     * Compile a selected block into valid PHP.
+     *
+     * @param  string  $condition
+     * @return string
+     */
+    protected function compileSelected($condition)
+    {
+        return "<?php if{$condition}: echo 'selected'; endif; ?>";
+    }
+
     /**
      * Compile the push statements into valid PHP.
      *

tests/View/Blade/BladeBoolTest.php

@@ -0,0 +1,67 @@
+<?php
+
+namespace Illuminate\Tests\View\Blade;
+
+class BladeBoolTest extends AbstractBladeTestCase
+{
+    public function testBool()
+    {
+        // For Javascript object{'isBool' : true}
+        $string = "{'isBool' : @bool(true)}";
+        $expected = "{'isBool' : <?php echo ((true) ? 'true' : 'false'); ?>}";
+        $this->assertEquals($expected, $this->compiler->compileString($string));
+
+        // For Javascript object{'isBool' : false}
+        $string = "{'isBool' : @bool(false)}";
+        $expected = "{'isBool' : <?php echo ((false) ? 'true' : 'false'); ?>}";
+        $this->assertEquals($expected, $this->compiler->compileString($string));
+
+        // For Alpine.js x-show attribute
+        $string = "<input type='text' x-show='@bool(true)' />";
+        $expected = "<input type='text' x-show='<?php echo ((true) ? 'true' : 'false'); ?>' />";
+        $this->assertEquals($expected, $this->compiler->compileString($string));
+
+        // For Alpine.js x-show attribute
+        $string = "<input type='text' x-show='@bool(false)' />";
+        $expected = "<input type='text' x-show='<?php echo ((false) ? 'true' : 'false'); ?>' />";
+        $this->assertEquals($expected, $this->compiler->compileString($string));
+    }
+
+    public function testCompileBool(): void
+    {
+        $someViewVarTruthy = 123;
+        $compiled = $this->compiler->compileString('@bool($someViewVarTruthy)');
+
+        ob_start();
+        eval(substr($compiled, 6, -3));
+        $this->assertEquals('true', ob_get_clean());
+
+        $someViewVarFalsey = '0';
+        $compiled = $this->compiler->compileString('@bool($someViewVarFalsey)');
+
+        ob_start();
+        eval(substr($compiled, 6, -3));
+        $this->assertEquals('false', ob_get_clean());
+
+        $anotherSomeViewVarTruthy = new SomeClass();
+        $compiled = $this->compiler->compileString('@bool($anotherSomeViewVarTruthy)');
+
+        ob_start();
+        eval(substr($compiled, 6, -3));
+        $this->assertEquals('true', ob_get_clean());
+
+        $anotherSomeViewVarFalsey = null;
+        $compiled = $this->compiler->compileString('@bool($anotherSomeViewVarFalsey)');
+
+        ob_start();
+        eval(substr($compiled, 6, -3));
+        $this->assertEquals('false', ob_get_clean());
+    }
+}
+
+class SomeClass
+{
+    public function someMethod()
+    {
+    }
+}