20220717

vendor/illuminate/conditionable/Traits/Conditionable.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace Illuminate\Support\Traits;
+
+use Closure;
+use Illuminate\Support\HigherOrderWhenProxy;
+
+trait Conditionable
+{
+    /**
+     * Apply the callback if the given "value" is (or resolves to) truthy.
+     *
+     * @template TWhenParameter
+     * @template TWhenReturnType
+     *
+     * @param  (\Closure($this): TWhenParameter)|TWhenParameter  $value
+     * @param  (callable($this, TWhenParameter): TWhenReturnType)|null  $callback
+     * @param  (callable($this, TWhenParameter): TWhenReturnType)|null  $default
+     * @return $this|TWhenReturnType
+     */
+    public function when($value, callable $callback = null, callable $default = null)
+    {
+        $value = $value instanceof Closure ? $value($this) : $value;
+
+        if (func_num_args() === 1) {
+            return new HigherOrderWhenProxy($this, $value);
+        }
+
+        if ($value) {
+            return $callback($this, $value) ?? $this;
+        } elseif ($default) {
+            return $default($this, $value) ?? $this;
+        }
+
+        return $this;
+    }
+
+    /**
+     * Apply the callback if the given "value" is (or resolves to) falsy.
+     *
+     * @template TUnlessParameter
+     * @template TUnlessReturnType
+     *
+     * @param  (\Closure($this): TUnlessParameter)|TUnlessParameter  $value
+     * @param  (callable($this, TUnlessParameter): TUnlessReturnType)|null  $callback
+     * @param  (callable($this, TUnlessParameter): TUnlessReturnType)|null  $default
+     * @return $this|TUnlessReturnType
+     */
+    public function unless($value, callable $callback = null, callable $default = null)
+    {
+        $value = $value instanceof Closure ? $value($this) : $value;
+
+        if (func_num_args() === 1) {
+            return new HigherOrderWhenProxy($this, ! $value);
+        }
+
+        if (! $value) {
+            return $callback($this, $value) ?? $this;
+        } elseif ($default) {
+            return $default($this, $value) ?? $this;
+        }
+
+        return $this;
+    }
+}