added chat

database/migrations/2026_07_30_000001_add_chat_columns_to_customers_table.php

@@ -0,0 +1,53 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        if (! Schema::hasTable('customers')) {
+            return;
+        }
+
+        $this->addCustomerColumnIfMissing('chat_room_id', 'VARCHAR(255) NULL DEFAULT NULL', 'conditional_order_limit');
+        $this->addCustomerColumnIfMissing('chat_user_id', 'VARCHAR(255) NULL DEFAULT NULL', 'chat_room_id');
+    }
+
+    public function down(): void
+    {
+        // عمداً خالی — rollback ستون را حذف نمی‌کند
+    }
+
+    private function customersTable(): string
+    {
+        return DB::getTablePrefix().'customers';
+    }
+
+    private function customerColumnExists(string $column): bool
+    {
+        $result = DB::selectOne(
+            'SELECT COUNT(*) AS cnt FROM information_schema.COLUMNS
+             WHERE TABLE_SCHEMA = ? AND TABLE_NAME = ? AND COLUMN_NAME = ?',
+            [DB::connection()->getDatabaseName(), $this->customersTable(), $column]
+        );
+
+        return (int) $result->cnt > 0;
+    }
+
+    private function addCustomerColumnIfMissing(string $column, string $definition, ?string $after = null): void
+    {
+        if ($this->customerColumnExists($column)) {
+            return;
+        }
+
+        $table = $this->customersTable();
+        $afterClause = ($after !== null && $this->customerColumnExists($after))
+            ? " AFTER `{$after}`"
+            : '';
+
+        DB::statement("ALTER TABLE `{$table}` ADD COLUMN `{$column}` {$definition}{$afterClause}");
+    }
+};