fix: add proper Order Enum handling for MySQL->order() (#43)

I made a rushed merge with #41 and it doesn't work properly.. it throws an exception when passing an `Order` enum to the method, because we're only accepting strings. #42

Reviewed-on: https://codeberg.org/vlw/php-mysql/pulls/43

src/MySQL.php

@@ -8,8 +8,10 @@
 	use mysqli_stmt;
 	use mysqli_result;
 
+	use vlw\MySQL\Order;
 	use vlw\MySQL\Operators;
 
+	require_once "Order.php";
 	require_once "Operators.php";
 
 	// Interface for MySQL_Driver with abstractions for data manipulation
@@ -50,7 +52,11 @@
 
 		// Convert all boolean type values to tinyints in array
 		private static function filter_booleans(array $values): array {
-			return array_map(fn($v): mixed => gettype($v) === "boolean" ? self::filter_boolean($v) : $v, $values);
+			return array_map(fn(mixed $v): mixed => gettype($v) === "boolean" ? self::filter_boolean($v) : $v, $values);
+		}
+
+		private static function array_wrap_accents(array $input): array {
+			return array_map(fn(mixed $v): string => "`{$v}`", $input);
 		}
 
 		/*
@@ -174,12 +180,12 @@
 				return $this;
 			}
 
-			// Create CSV from columns
-			$sql = implode(",", array_keys($order_by));
-			// Create pipe DSV from values 
-			$sql .= " " . implode("|", array_values($order_by));
+			// Assign Order Enum entries from array of arrays<Order|string>
+			$orders = array_map(fn(Order|string $order): Order => $order instanceof Order ? $order : Order::tryFrom($order), array_values($order_by));
+			// Create CSV string with Prepared Statement abbreviations from length of fields array.
+			$sql = array_map(fn(string $column, Order|string $order): string => "`{$column}` " . $order->value, array_keys($order_by), $orders);
 
-			$this->order_by = $sql;
+			$this->order_by = implode(",", $sql);
 			return $this;
 		}
 
@@ -196,7 +202,7 @@
 			$this->columns = is_array($columns) || is_null($columns) ? $columns : explode(",", $columns);
 
 			// Create CSV from columns or default to SQL NULL as a string
-			$columns_sql = $this->columns ? implode(",", $this->columns) : "NULL";
+			$columns_sql = $this->columns ? implode(",", self::array_wrap_accents($this->columns)) : "NULL";
 
 			// Create LIMIT statement if argument is defined
 			$limit_sql = !is_null($this->limit) ? " LIMIT {$this->limit}" : "";
@@ -218,7 +224,7 @@
 			$this->throw_if_no_table();
 
 			// Create CSV string with Prepared Statement abbreviations from length of fields array.
-			$changes = array_map(fn($column) => "{$column} = ?", array_keys($entity));
+			$changes = array_map(fn($column) => "`{$column}` = ?", array_keys($entity));
 			$changes = implode(",", $changes);
 
 			// Get array of SQL WHERE string and filter values

src/Order.php

@@ -0,0 +1,8 @@
+<?php
+
+	namespace vlw\MySQL;
+
+	enum Order: string {
+		case ASC  = "ASC";
+		case DESC = "DESC";
+	}