Allow to use boolean and null as filter argument

Author: vidy

src/BladeFilterLexer.php

@@ -26,6 +26,16 @@ class BladeFilterLexer extends AbstractLexer
     public const T_COLON = 103;
     public const T_COMMA = 104;
     public const T_PIPE = 105;
+    public const T_TRUE                = 106;
+    public const T_NULL                = 107;
+    public const T_FALSE               = 108;
+
+    /** @var array<string, int> */
+    protected $specials = [
+        'true'  => self::T_TRUE,
+        'false' => self::T_FALSE,
+        'null'  => self::T_NULL,
+    ];
 
     /**
      * @inheritdoc
@@ -69,7 +79,11 @@ protected function getNonCatchablePatterns()
      */
     protected function getType(&$value)
     {
-       
+        $lowerValue = strtolower($value);
+        if (isset($this->specials[$lowerValue])) {
+            return $this->specials[$lowerValue];
+        }
+
         switch (true) {
             /**
              * Recognize numeric values

src/BladeFilterParser.php

@@ -6,6 +6,16 @@
 
 class BladeFilterParser
 {
+    protected $validArgumentValueTypes = [
+        BladeFilterLexer::T_INTEGER, 
+        BladeFilterLexer::T_STRING,
+        BladeFilterLexer::T_FLOAT,
+        BladeFilterLexer::T_VARIABLE_EXPRESSION,
+        BladeFilterLexer::T_TRUE,
+        BladeFilterLexer::T_FALSE,
+        BladeFilterLexer::T_NULL,
+    ];
+
     private BladeFilterLexer $lexer;
 
     private $input;
@@ -148,13 +158,7 @@ private function collectFilterArgument(): array
         $this->syntaxErrorIf(null === $token,
             sprintf('No value specified for argument "%s"',$argumentName)
         );
-        $isValidArgumentValue = $this->lexer->isNextTokenAny([
-            BladeFilterLexer::T_INTEGER, 
-            BladeFilterLexer::T_STRING,
-            BladeFilterLexer::T_FLOAT,
-            BladeFilterLexer::T_VARIABLE_EXPRESSION,
-        ]);
-
+        $isValidArgumentValue = $this->lexer->isNextTokenAny($this->validArgumentValueTypes);
         $this->syntaxErrorIf(!$isValidArgumentValue,
             sprintf(' The value of filter argument "%s" is not valid, it supposed to be string, integer, float or variable, got %s', 
             $argumentName,

tests/BladeFilterParserTest.php

@@ -57,5 +57,17 @@ public function test_invalid_filter_argument_name()
         $parser = new BladeFilterParser();
 
         $parser->parse($input);
-   }
+    }
+
+    /** @test */
+    public function test_bool_or_null_argument_value()
+    {
+        $input = '"css/carousel.css" | stylesheet_tag:media=null,preload=true';
+
+        $parser = new BladeFilterParser();
+
+        $filter = $parser->parse($input);
+
+        $this->assertEquals($filter['filters'][0]['arguments']['media'], "null");
+    }
 }