Suggestion: Add the ability to define a FileStorage default value by means of a URL

[wltrup]

Hello,

In Reusable, type-safe keys, you have

extension SharedReaderKey
where Self == FileStorageKey<IdentifiedArrayOf<User>>.Default {
  static var users: Self {
    Self[.fileStorage(URL(/* ... */)), default: []]
  }
}

as an example of how to define a reusable type-safe key that also implicitly defines a default value for the shared quantity. In this particular example the default is an empty array but what if the default is some (possibly large) set of predefined values?

It would be nice if it was possible to define the default by means of a URL to a file containing the default data, perhaps along the lines of

extension SharedReaderKey
where Self == FileStorageKey<IdentifiedArrayOf<User>>.Default {
  static var users: Self {
    Self[.fileStorage(URL(/* ... */)), default: URL(/* ... */)]
  }
}

The first URL points to the usual "live" file while the second URL would point to a read-only file containing the data to be used as the default.

Is this something you would consider adding to the library?

Many thanks in advance.

[mbrandonw]

Hi @wltrup, it seems like you are able to accomplish this without any changes to the library:

extension SharedReaderKey
where Self == FileStorageKey<IdentifiedArrayOf<User>>.Default {
  static var users: Self {
    Self[
      .fileStorage(URL(/* ... */)), 
      default: (try? JSONDecode(/*load data here*/)) ?? []
    ]
  }
}

[wltrup]

Ah, yes, of course. Thank you, Brandon. 👍