spliit/src/app/groups/recent-groups-helpers.ts

import { z } from 'zod'

export const recentGroupsSchema = z.array(
  z.object({
    id: z.string().min(1),
    name: z.string(),
  }),
)

export type RecentGroups = z.infer<typeof recentGroupsSchema>
export type RecentGroup = RecentGroups[number]

const STORAGE_KEY = 'recentGroups'

export function getRecentGroups() {
  const groupsInStorageJson = localStorage.getItem(STORAGE_KEY)
  const groupsInStorageRaw = groupsInStorageJson
    ? JSON.parse(groupsInStorageJson)
    : []
  const parseResult = recentGroupsSchema.safeParse(groupsInStorageRaw)
  return parseResult.success ? parseResult.data : []
}

export function saveRecentGroup(group: RecentGroup) {
  const recentGroups = getRecentGroups()
  localStorage.setItem(
    STORAGE_KEY,
    JSON.stringify([group, ...recentGroups.filter((rg) => rg.id !== group.id)]),
  )
}