Refactor deployment target types and add validation function

Author: cursoragent

src/types/deployment.ts

@@ -0,0 +1,25 @@
+/**
+ * Valid deployment targets for the application
+ */
+export type DeploymentTarget = 'netlify' | 'vercel' | 'cloudflare-pages' | 'node-server' | 'bun';
+
+/**
+ * Configuration options for TanStack Start plugin
+ */
+export interface TanStackStartOptions {
+  target?: DeploymentTarget;
+}
+
+/**
+ * Validates if a string is a valid deployment target
+ */
+export function isValidDeploymentTarget(target: string): target is DeploymentTarget {
+  const validTargets: DeploymentTarget[] = [
+    'netlify',
+    'vercel',
+    'cloudflare-pages',
+    'node-server',
+    'bun',
+  ];
+  return validTargets.includes(target as DeploymentTarget);
+}

vite.config.ts

@@ -2,9 +2,7 @@ import tailwindcss from '@tailwindcss/vite';
 import { tanstackStart } from '@tanstack/react-start/plugin/vite';
 import { defineConfig, loadEnv } from 'vite';
 import tsConfigPaths from 'vite-tsconfig-paths';
-
-// Define valid deployment targets
-type DeploymentTarget = 'netlify' | 'vercel' | 'cloudflare-pages' | 'node-server' | 'bun';
+import type { DeploymentTarget, TanStackStartOptions } from '~/types/deployment';
 
 export default defineConfig(({ mode }) => {
   // Load environment variables
@@ -14,7 +12,7 @@ export default defineConfig(({ mode }) => {
   const deploymentTarget = env.VITE_DEPLOYMENT_TARGET as DeploymentTarget | undefined;
 
   // Prepare tanstackStart options
-  const tanstackStartOptions: { target?: DeploymentTarget } = {};
+  const tanstackStartOptions: TanStackStartOptions = {};
   if (deploymentTarget) {
     tanstackStartOptions.target = deploymentTarget;
   }