Refactor to use ai/rsc (#253)

app/login/actions.ts

@@ -0,0 +1,50 @@
+'use server'
+
+import { signIn } from '@/auth'
+import { AuthResult } from '@/lib/types'
+import { AuthError } from 'next-auth'
+import { z } from 'zod'
+
+export async function authenticate(
+  _prevState: AuthResult | undefined,
+  formData: FormData
+) {
+  try {
+    const email = formData.get('email')
+    const password = formData.get('password')
+
+    const parsedCredentials = z
+      .object({
+        email: z.string().email(),
+        password: z.string().min(6)
+      })
+      .safeParse({
+        email,
+        password
+      })
+
+    if (parsedCredentials.success) {
+      await signIn('credentials', {
+        email,
+        password,
+        redirectTo: '/'
+      })
+    } else {
+      return { type: 'error', message: 'Invalid credentials!' }
+    }
+  } catch (error) {
+    if (error instanceof AuthError) {
+      switch (error.type) {
+        case 'CredentialsSignin':
+          return { type: 'error', message: 'Invalid credentials!' }
+        default:
+          return {
+            type: 'error',
+            message: 'Something went wrong, please try again!'
+          }
+      }
+    }
+
+    throw error
+  }
+}