Multiuser support (#60)

lib/zod.ts

@@ -0,0 +1,17 @@
+import { literal, object, string } from "zod"
+
+export const usernameSchema = string()
+  .min(3, "Username must be at least 3 characters")
+  .max(20, "Username must be less than 20 characters")
+  .regex(/^[a-zA-Z0-9]+$/, "Username must be alphanumeric")
+
+export const passwordSchema = string()
+  .min(4, "Password must be more than 4 characters")
+  .max(32, "Password must be less than 32 characters")
+  .optional()
+  .or(literal(''))
+
+export const signInSchema = object({
+  username: usernameSchema,
+  password: passwordSchema,
+})