add trait

Author: fdreamsu

composer.json

@@ -24,7 +24,8 @@
 			"src/FinishFunc.php",
 			"src/FileLog.php",
 			"src/Xml.php",
-			"src/XmlDecodeFailException.php"
+			"src/XmlDecodeFailException.php",
+			"src/trait/"
 		],
 		"files" : [
 			"src/XString.php",

src/trait/ExtraHandlerTrait.php

@@ -0,0 +1,11 @@
+<?php
+trait ExtraHandlerTrait {
+    public function getExtra(): object {
+        return $this->extra ??= new \stdClass();
+    }
+    public function saveExtra(): void {
+        $this->update([
+            'extra' => $this->extra
+        ]);
+    }
+}

src/trait/NamedEnumBackedTrait.php

@@ -0,0 +1,31 @@
+<?php
+trait NamedEnumBackedTrait {
+    abstract public function getName(): string;
+    public static function getNameMap(): array {
+        static $name_map = null;
+        if (! isset($name_map)) {
+            $name_map = [];
+            foreach (static::cases() as $status)
+                $name_map[$status->value] = $status->getName();
+        }
+        return $name_map;
+    }
+    public static function getKeyNameObjectArray(): array {
+        static $name_map_array = null;
+        if (! isset($name_map_array)) {
+            $name_map_array = [];
+            foreach (static::cases() as $status)
+                $name_map_array[] = $status->getKeyNameObject();
+        }
+        return $name_map_array;
+    }
+    public function getKeyNameObject(): object {
+        $ob = new stdClass();
+        $ob->name = $this->getName();
+        $ob->key = $this->value;
+        return $ob;
+    }
+    public function getKeyNamePairMap(): array {
+        return [$this->value => $this->getName()];
+    }
+}