Merge pull request #9 from kohenkatz/patch-1

Add option to allow alpha transparency as 4 or 8 characters

Author: ssx

src/Hex.php

@@ -11,9 +11,16 @@ class Hex implements Rule
      */
     protected $forceFull;
 
-    public function __construct($forceFull = false)
+    /**
+     * @var bool
+     */
+    protected $allowAlpha;
+
+    public function __construct($forceFull = false, $allowAlpha = false)
     {
         $this->forceFull = $forceFull;
+        
+        $this->allowAlpha = $allowAlpha;
     }
 
     /**
@@ -32,6 +39,14 @@ public function passes($attribute, $value)
             $pattern .= '|[a-fA-F0-9]{3}';
         }
 
+        if ($this->allowAlpha) {
+            $pattern .= '|[a-fA-F0-9]{8}';
+    
+            if (!$this->forceFull) {
+                $pattern .= '|[a-fA-F0-9]{4}';
+            }
+        }
+
         $pattern .= ')$/';
 
         return (bool) preg_match($pattern, $value);

tests/Feature/HexTest.php

@@ -37,4 +37,20 @@ public function three_characters_with_hash()
 
         $this->assertTrue($this->validator('#fff', false)->passes()); // full
     }
+    
+    public function eight_characters_with_hash()
+    {
+        $this->assertTrue($this->validator('#ff008000')->fails());
+        $this->assertTrue($this->validator('#fg00800g', true, true)->fails());
+        $this->assertTrue($this->validator('#ff008000', true, true)->passes());
+    }
+
+    /** @test */
+    public function four_characters_with_hash()
+    {
+        $this->assertTrue($this->validator('#ffff', true, true)->passes());
+        $this->assertTrue($this->validator('#ffff', true, false)->fails());
+        $this->assertTrue($this->validator('#gggg', true, true)->fails());
+        $this->assertTrue($this->validator('#ffff', false, true)->passes());
+    }
 }