initial commit

pma/libraries/classes/FlashMessages.php

@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpMyAdmin;
+
+use RuntimeException;
+
+use function __;
+
+final class FlashMessages
+{
+    private const STORAGE_KEY = 'flashMessages';
+
+    /** @var array */
+    private $storage;
+
+    /** @var array<string, string[]> */
+    private $previousMessages = [];
+
+    public function __construct()
+    {
+        if (! isset($_SESSION)) {
+            throw new RuntimeException(__('Session not found.'));
+        }
+
+        $this->storage = &$_SESSION;
+
+        if (isset($this->storage[self::STORAGE_KEY])) {
+            $this->previousMessages = $this->storage[self::STORAGE_KEY];
+        }
+
+        $this->storage[self::STORAGE_KEY] = [];
+    }
+
+    public function addMessage(string $key, string $message): void
+    {
+        if (! isset($this->storage[self::STORAGE_KEY][$key])) {
+            $this->storage[self::STORAGE_KEY][$key] = [];
+        }
+
+        $this->storage[self::STORAGE_KEY][$key][] = $message;
+    }
+
+    /** @return string[]|null */
+    public function getMessage(string $key): ?array
+    {
+        return $this->previousMessages[$key] ?? null;
+    }
+
+    /** @return array<string, string[]> */
+    public function getMessages(): array
+    {
+        return $this->previousMessages;
+    }
+}