Checking for another store value (auth) in each getter, can this be extracted?

[notflip]

I have my Photo Store, in which I init an Auth Store in 2 getters to see if the user is authenticated, otherwise I return an empty array, I'm wondering if this check could be simplified/extracted to a method to DRY up this piece of code?

   getters: {
        allPhotos: (state): Photo[] => state.photos,
        userPhotos(state): Photo[] {
            const authStore = useAuth();
            if (authStore.user === undefined) {
                return [];
            }
            const authUserId = authStore.user.id;
            return state.photos.filter(p => p.user.id === authUserId)
        },
        otherUserPhotos(state): Photo[] {
            const authStore = useAuth()
            if (authStore.user === undefined) {
                return []
            }

            const authUserId = authStore.user.id

            return state.photos
                .filter(p => p.user.id === authUserId)
                .filter(p => p.date < Date.now())
        },
    },

Here inside my actions I'm also checking it the auth store has the user

actions: {
        async fetchUserPhotos(amount = 6): Promise<void> {
            const authStore = useAuth()
            const authUser = authStore.user

            if (authUser === undefined) {
                throw new Error('User is not signed in')
            }

            // rest of action
        },
}

[BenShelton]

You could use a function, it can be outside the store definition, either in the same file or in another file if you want to use this check across multiple stores (or even in components):

function userMissing (): boolean {
  const authStore = useAuth()
  const authUser = authStore.user
  return authUser === undefined
}

export const useWhateverStore = defineStore(/* ... */)

And then in the getters/actions:

actions: {
  async fetchUserPhotos(amount = 6): Promise<void> {
    if (userMissing()) {
      throw new Error('User is not signed in')
    }
    // ...
  }

[notflip]

Thank you, wonderful that this works out of the box like that