move from old repository

enums/Operator.php

@@ -0,0 +1,37 @@
+<?php
+namespace DatabaseHelper\enums;
+
+use InvalidArgumentException;
+
+enum Operator
+{
+    case EQUAL;
+    case NOT_EQUAL;
+    case GREATER;
+    case GREATER_EQUAL;
+    case LESS;
+    case LESS_EQUAL;
+
+    public static function fromString(string $operator): self {
+        return match ($operator) {
+            '='   => self::EQUAL,
+            '!='  => self::NOT_EQUAL,
+            '>'   => self::GREATER,
+            '>='  => self::GREATER_EQUAL,
+            '<'   => self::LESS,
+            '<='  => self::LESS_EQUAL,
+            default => throw new InvalidArgumentException("Invalid operator: $operator"),
+        };
+    }
+
+    public function toString(): string {
+        return match ($this) {
+            self::EQUAL         => '=',
+            self::NOT_EQUAL     => '!=',
+            self::GREATER       => '>',
+            self::GREATER_EQUAL => '>=',
+            self::LESS          => '<',
+            self::LESS_EQUAL    => '<=',
+        };
+    }
+}