Multiuser support (#60)

lib/client-helpers.ts

@@ -0,0 +1,24 @@
+// client helpers
+'use-client'
+
+import { useSession } from "next-auth/react"
+import { User, UserId } from './types'
+import { useAtom } from 'jotai'
+import { usersAtom } from './atoms'
+import { checkPermission } from './utils'
+
+export function useHelpers() {
+  const { data: session, status } = useSession()
+  const currentUserId = session?.user.id
+  const [usersData] = useAtom(usersAtom)
+  const currentUser = usersData.users.find((u) => u.id === currentUserId)
+
+  return {
+    currentUserId,
+    currentUser,
+    usersData,
+    status,
+    hasPermission: (resource: 'habit' | 'wishlist' | 'coins', action: 'write' | 'interact') => currentUser?.isAdmin ||
+      checkPermission(currentUser?.permissions, resource, action)
+  }
+}