refactor: enforce frontend view model boundaries

src/pages/account-income/model/income.schema.ts

@@ -0,0 +1,31 @@
+import { z } from "zod";
+
+import { validationMessage } from "@/shared/i18n";
+
+import { moscowDate, parseDraftDate } from "./period";
+
+const draftDate = z
+	.string()
+	.refine(value => parseDraftDate(value) !== null, {
+		error: validationMessage("income.validation.date"),
+	})
+	.refine(
+		(value) => {
+			const date = parseDraftDate(value);
+
+			return !date || date <= moscowDate(new Date());
+		},
+		{ error: validationMessage("income.validation.future") },
+	);
+
+const incomeFormSchema = z.object({ from: draftDate, to: draftDate }).refine(
+	({ from, to }) => {
+		const start = parseDraftDate(from);
+		const end = parseDraftDate(to);
+
+		return !start || !end || start <= end;
+	},
+	{ path: ["to"], ...validationMessage("income.validation.period")({}) },
+);
+
+export { incomeFormSchema };