First version

src/lib/schemas.ts

@@ -0,0 +1,50 @@
+import * as z from 'zod'
+
+export const groupFormSchema = z
+  .object({
+    name: z
+      .string()
+      .min(2, 'Enter at least two characters.')
+      .max(50, 'Enter at most 50 characters.'),
+    participants: z
+      .array(
+        z.object({
+          id: z.string().optional(),
+          name: z
+            .string()
+            .min(2, 'Enter at least two characters.')
+            .max(50, 'Enter at most 50 characters.'),
+        }),
+      )
+      .min(1),
+  })
+  .superRefine(({ participants }, ctx) => {
+    participants.forEach((participant, i) => {
+      participants.slice(0, i).forEach((otherParticipant) => {
+        if (otherParticipant.name === participant.name) {
+          ctx.addIssue({
+            code: 'custom',
+            message: 'Another participant already has this name.',
+            path: ['participants', i, 'name'],
+          })
+        }
+      })
+    })
+  })
+
+export type GroupFormValues = z.infer<typeof groupFormSchema>
+
+export const expenseFormSchema = z.object({
+  title: z
+    .string({ required_error: 'Please enter a title.' })
+    .min(2, 'Enter at least two characters.'),
+  amount: z.coerce
+    .number({ required_error: 'You must enter an amount.' })
+    .min(0.01, 'The amount must be higher than 0.01.'),
+  paidBy: z.string({ required_error: 'You must select a participant.' }),
+  paidFor: z
+    .array(z.string())
+    .min(1, 'The expense must be paid for at least 1 participant.'),
+})
+
+export type ExpenseFormValues = z.infer<typeof expenseFormSchema>