From fda9d3dad85ecea609ef9c6323d6923536cf5643 Mon Sep 17 00:00:00 2001
From: ThunderbirdsX3 <THUNDER_BIRDS_No.XIII@live.com>
Date: Wed, 30 May 2018 23:09:07 +0700
Subject: [PATCH] Can set class attribute in array. (#521)

In case of you want to add class by condition.

```
Form::text('name', null, ['class' => [
    'form-control-,
    $error ? 'is-invalid' : '',
]]);
```
---
 src/HtmlBuilder.php       |  4 ++++
 tests/FormBuilderTest.php | 12 ++++++++++++
 tests/HtmlBuilderTest.php | 14 ++++++++++++++
 3 files changed, 30 insertions(+)

diff --git a/src/HtmlBuilder.php b/src/HtmlBuilder.php
index 17da19f5..743b32a0 100755
--- a/src/HtmlBuilder.php
+++ b/src/HtmlBuilder.php
@@ -455,6 +455,10 @@ protected function attributeElement($key, $value)
             return $value ? $key : '';
         }
 
+        if (is_array($value) && $key === 'class') {
+            return 'class="' . implode(' ', $value) . '"';
+        }
+
         if (! is_null($value)) {
             return $key . '="' . e($value, false) . '"';
         }
diff --git a/tests/FormBuilderTest.php b/tests/FormBuilderTest.php
index 6936a5f2..35d43c0e 100644
--- a/tests/FormBuilderTest.php
+++ b/tests/FormBuilderTest.php
@@ -792,6 +792,18 @@ public function testBooleanAttributes()
         $this->assertEquals('<textarea readonly name="test" cols="50" rows="10"></textarea>', $input);
     }
 
+    public function testArrayClassAttributes()
+    {
+        $input = $this->formBuilder->text('test', null, ['class' => ['class-a', 'class-b']]);
+        $this->assertEquals('<input class="class-a class-b" name="test" type="text">', $input);
+
+        $input = $this->formBuilder->text('test', null, ['class' => [
+            'class-a',
+            false ? 'class-b' : 'class-c'
+        ]]);
+        $this->assertEquals('<input class="class-a class-c" name="test" type="text">', $input);
+    }
+
     protected function setModel(array $data, $object = true)
     {
         if ($object) {
diff --git a/tests/HtmlBuilderTest.php b/tests/HtmlBuilderTest.php
index a5a9ee27..f79320af 100644
--- a/tests/HtmlBuilderTest.php
+++ b/tests/HtmlBuilderTest.php
@@ -151,4 +151,18 @@ public function testBooleanAttributes()
 
         $this->assertEquals('', trim($result2));
     }
+
+    public function testArrayClassAttributes()
+    {
+        $result = $this->htmlBuilder->attributes(['class' => ['class-a', 'class-b']]);
+
+        $this->assertEquals('class="class-a class-b"', trim($result));
+
+        $result = $this->htmlBuilder->attributes(['class' => [
+            'class-a',
+            false ? 'class-b' : 'class-c'
+        ]]);
+
+        $this->assertEquals('class="class-a class-c"', trim($result));
+    }
 }