feat: add config download functionality

src/builders/ConfigBuilder.ts

@@ -0,0 +1,39 @@
+import { Config } from "../models/Config";
+import { EnvBuilder } from "./EnvBuilder";
+
+export class ConfigBuilder {
+  /**
+   * Builds a full XML config file with all environments and template.
+   */
+  public static buildFullXml(config: Config): string {
+    const lines: string[] = [];
+    lines.push("<engine>");
+
+    // Add all environments
+    for (const env of config.envs) {
+      const envXml = new EnvBuilder().buildEnv(env);
+      lines.push(envXml);
+    }
+
+    // Add template
+    lines.push("    <template>");
+    lines.push(config.template.content);
+    lines.push("    </template>");
+
+    lines.push("</engine>");
+    return lines.join("\r\n");
+  }
+
+  /**
+   * Generates filename with timestamp: config_yy-dd-MM-HHmm.json.xml
+   */
+  public static generateFilename(): string {
+    const now = new Date();
+    const yy = now.getFullYear().toString().slice(-2);
+    const dd = String(now.getDate()).padStart(2, '0');
+    const MM = String(now.getMonth() + 1).padStart(2, '0');
+    const HH = String(now.getHours()).padStart(2, '0');
+    const mm = String(now.getMinutes()).padStart(2, '0');
+    return `config_${yy}-${dd}-${MM}-${HH}${mm}.json.xml`;
+  }
+}