refactor: centralize event dialog form state

src/lib/event-form.ts

@@ -0,0 +1,84 @@
+import { isAfter, parseISO } from "date-fns";
+import { z } from "zod";
+import type { CalendarEvent } from "@/lib/types";
+
+export interface EventFormValues {
+	title: string;
+	description: string;
+	location: string;
+	url: string;
+	start: string;
+	end: string;
+	allDay: boolean;
+	recurrenceRule?: string;
+}
+
+const eventFormSchema = z
+	.object({
+		title: z.string().trim().min(1, "Title is required."),
+		description: z.string(),
+		location: z.string(),
+		url: z.preprocess((value) => value ?? "", z.string().trim()),
+		start: z.string().trim().min(1, "Start date is required."),
+		end: z.string(),
+		allDay: z.boolean(),
+		recurrenceRule: z.string().optional(),
+	})
+	.superRefine((value, ctx) => {
+		if (value.url) {
+			const urlValidation = z.string().url().safeParse(value.url);
+			if (!urlValidation.success) {
+				ctx.addIssue({
+					code: z.ZodIssueCode.custom,
+					path: ["url"],
+					message: "Enter a valid URL.",
+				});
+			}
+		}
+
+		if (value.end) {
+			const startDate = parseISO(value.start);
+			const endDate = parseISO(value.end);
+			if (Number.isNaN(startDate.getTime()) || Number.isNaN(endDate.getTime())) {
+				ctx.addIssue({
+					code: z.ZodIssueCode.custom,
+					path: ["end"],
+					message: "End date must be valid.",
+				});
+			} else if (!isAfter(endDate, startDate)) {
+				ctx.addIssue({
+					code: z.ZodIssueCode.custom,
+					path: ["end"],
+					message: "End date must be after the start date.",
+				});
+			}
+		}
+	});
+
+export const getDefaultEventFormValues = (): EventFormValues => ({
+	title: "",
+	description: "",
+	location: "",
+	url: "",
+	start: "",
+	end: "",
+	allDay: false,
+	recurrenceRule: undefined,
+});
+
+export const getEventFormValuesFromEvent = (
+	event?: Partial<CalendarEvent>,
+): EventFormValues => ({
+	...getDefaultEventFormValues(),
+	title: event?.title || "",
+	description: event?.description || "",
+	location: event?.location || "",
+	url: event?.url || "",
+	start: event?.start || "",
+	end: event?.end || "",
+	allDay: event?.allDay || false,
+	recurrenceRule: event?.recurrenceRule || undefined,
+});
+
+export const validateEventFormValues = (values: EventFormValues) =>
+	eventFormSchema.safeParse(values);