feat: expose UUID helper as a class of static methods (#10)

Let's expose the uuid helpers as a class of static methods instead. I'm not sure if this approach is actually better but we're going to live with it for a while. I have done UUID helpers before this library as a class. So let's run with it again.

Reviewed-on: https://codeberg.org/vlw/scaffold/pulls/10

src/Database/Model.php

@@ -72,9 +72,8 @@
 		 * 
 		 * @return bool Entity exists
 		 */
-		public bool $isset {
-			// Returns bool if row is set or attempts to resolve and set if null
-			get => $this->_isset ??= new Database()
+		public function isset(): bool {
+			return $this->_isset ??= new Database()
 				->from($this->table)
 				->where($this->where)
 				->limit(1)

src/Helpers/UUID.php

@@ -2,14 +2,18 @@
 
 	namespace vlw\Scaffold\Helpers;
 
-	const UUID_LENGTH = 36;
+	/**
+	 * Generate Universally unique identifiers
+	 */
+	class UUID {
+		public const LENGTH = 36;
 
 		/**
 		 * Generate an all binary 0:s UUID
 		 * 
 		 * @return string
 		 */
-	function uuid_nil(): string {
+		public static function nil(): string {
 			return "00000000-0000-0000-0000-000000000000";
 		}
 
@@ -18,7 +22,7 @@
 		 * 
 		 * @return string
 		 */
-	function uuid_max(): string {
+		public static function max(): string {
 			return "FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF";
 		}
 
@@ -27,7 +31,7 @@
 		 * 
 		 * @return string
 		 */
-	function uuid_v4(): string {
+		public static function v4(): string {
 			return sprintf("%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
 				mt_rand(0, 0xffff), mt_rand(0, 0xffff),
 				mt_rand(0, 0xffff),
@@ -36,3 +40,4 @@
 				mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff)
 			);
 		}
+	}