Added BooleanCondition

Author: jhaoda

src/Label/BooleanCondition.php

@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * This file is part of PhpAidc LabelPrinter package.
+ *
+ * © Appwilio (https://appwilio.com)
+ * © JhaoDa (https://github.com/jhaoda)
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpAidc\LabelPrinter\Label;
+
+use PhpAidc\LabelPrinter\Contract\Condition;
+use PhpAidc\LabelPrinter\Contract\Label as LabelContract;
+
+final class BooleanCondition implements Condition
+{
+    /** @var mixed */
+    private $value;
+
+    /** @var callable */
+    private $callback;
+
+    public function __construct($value, callable $callback)
+    {
+        $this->value = $value;
+        $this->callback = $callback;
+    }
+
+    public function isTruthy(): bool
+    {
+        return (bool) $this->value;
+    }
+
+    public function apply(LabelContract $label): LabelContract
+    {
+        \call_user_func($this->callback, $label, $this->value);
+
+        return $label;
+    }
+}

src/Label/Label.php

@@ -145,4 +145,19 @@ public function for(string $language, callable $callback)
 
         return $this;
     }
+
+    /**
+     * Apply the callback if the value is truthy.
+     *
+     * @param  mixed     $value
+     * @param  callable  $callback
+     *
+     * @return $this
+     */
+    public function when($value, callable $callback)
+    {
+        $this->commands[] = new BooleanCondition($value, $callback);
+
+        return $this;
+    }
 }