From 0fccc3b4b1c46e42656e84e264555e57bf2f27cd Mon Sep 17 00:00:00 2001
From: Julien Rosset <julien.rosset@solulog.fr>
Date: Fri, 3 Sep 2021 12:57:30 +0200
Subject: [PATCH] Ajout du trait + un test

---
 README.md                    |  6 ++++++
 src/Singleton/TSingleton.php | 32 ++++++++++++++++++++++++++++++++
 tests/test.php               | 23 +++++++++++++++++++++++
 3 files changed, 61 insertions(+)
 create mode 100644 src/Singleton/TSingleton.php
 create mode 100644 tests/test.php

diff --git a/README.md b/README.md
index fcf8794..abf81ce 100644
--- a/README.md
+++ b/README.md
@@ -13,5 +13,11 @@ composer require jrosset/commandline
 ```php
 <?php
 
+use jrosset\Singleton\TSingleton;
 
+class MyClass {
+    use TSingleton;
+   
+    protected function __construct() {}
+}
 ```
diff --git a/src/Singleton/TSingleton.php b/src/Singleton/TSingleton.php
new file mode 100644
index 0000000..5d924d1
--- /dev/null
+++ b/src/Singleton/TSingleton.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace jrosset\Singleton;
+
+/**
+ * Classe d'implémentation d'un Singleton (création via le constructeur)
+ */
+trait TSingleton {
+    /**
+     * @var static|null L'instance. Null si pas encore créée
+     */
+    private static ?self $singleton_instance;
+    /**
+     * Initialise l'instance'
+     */
+    protected function __construct () {
+    }
+    /**
+     * Accès à l'instance du Singleton
+     *
+     * Si l'instance n'a pas encore été créée, elle le sera automatiquement
+     *
+     * @return static L'unique instance du Singleton
+     */
+    public static final function getInstance (): self {
+        if (!isset(self::$singleton_instance)) {
+            self::$singleton_instance = new static();
+        }
+
+        return self::$singleton_instance;
+    }
+}
\ No newline at end of file
diff --git a/tests/test.php b/tests/test.php
new file mode 100644
index 0000000..36be159
--- /dev/null
+++ b/tests/test.php
@@ -0,0 +1,23 @@
+<?php
+/** @noinspection PhpIllegalPsrClassPathInspection */
+
+require_once __DIR__ . '/../vendor/autoload.php';
+
+use jrosset\Singleton\TSingleton;
+
+class Test {
+    use TSingleton;
+
+    private int $cpt = 0;
+
+    public function getCpt (): int {
+        return $this->cpt;
+    }
+    public function increment (): void {
+        $this->cpt++;
+    }
+}
+
+var_dump(Test::getInstance()->getCpt());
+Test::getInstance()->increment();
+var_dump(Test::getInstance()->getCpt());