How can you get a string from resources strings in a viewmodel? We don't have LocalContext or simila...

# compose-desktop

[Pablo]

How can you get a string from resources strings in a viewmodel? We don't have LocalContext or similar thing here, and I need to recover it, because I need to store in the appstate a string resource value with some parameters

[Chrimaeon]

Just keep the id as long as you are able to resolve to the actual string. No need to resolve in the view model.

If you have additional format arguments create a wrapper an safe along.

i.e.

data class StringResource(
    val id: Int,
    val args: Array<Any>?
)

and use it like this

@Composable
    fun MyComposable() {
        val stringResource =
            StringResource(
                id = R.string.ok,
                args = arrayOf("Foo", 1),
            )

        Text(
            stringResource(stringResource.id, *stringResource.args.orEmpty()),
        )
    }

[Pablo]

wow, I did a few mins ago exactly what you propossed me

[Pablo]

data class LinesDBScreenUiState(
    val loading: Boolean = false,
    val message: StringResourceWithParameters? = null,
    val data: List<Line> = emptyList()
)

data class StringResourceWithParameters(
    val resource: StringResource,
    val parameters: Any = emptyList<Any>()
)

[Chrimaeon]

List will not work though if you need to send id as varags to the stringResource

[Chrimaeon]

check the syntax in my code snippet espacially the ***stringResource.args

[Pablo]

it's working, I'm using like this:

stringResource(message.resource, message.parameters),

[Chrimaeon]

this will pass only one argument and that as a list but if you have multiple args that will not work.

[Chrimaeon]

so what your code is doing is calling

stringResource(id, listOf("2", "3"))

instead of stringResource(id, "2", "3")

[Chrimaeon]

see the documentation https://kotlinlang.org/docs/functions.html#variable-number-of-arguments-varargs

[Chrimaeon]

You can pass a variable number of arguments (`vararg`) with names using the spread operator:

```fun foo(vararg strings: String) { /*...*/ }

foo(strings = *arrayOf("a", "b", "c"))```

[hfhbd]

BTW you don’t need the spread operator if you pass an array and mention the parameter name explicitly. IntelliJ warns you about this too.

[Chrimaeon]

So you are saying the documentation is wrong?

Looks like the docs are outdated. Curious which compiler version is needed for that? Maybe a k2 feature?

[Pablo]

is not possible to do it in some way that I don't need to call arrayOf if there is only one arg?

[Chrimaeon]

if you are sure there is only one then its fine without the array. I’d just be careful with that assumption 😉

[Pablo]

hehe

[Pablo]

well, it worked! thank you. On the other hand I see this as a little complex, probably if I read these lines in one year it will be hard to understand

[Pablo]

but as no simpler way to do this available, it will be the final implementation

[Sanlorng]

You can try suspend fun getString(res: StringRes) if you are using Compose Components Resources as Resources library.

[Pablo]

how can that be used in compose for desktop?

[Sanlorng]

https://www.jetbrains.com/help/kotlin-multiplatform-dev/compose-multiplatform-resources.html

[Pablo]

is a good practice to recover resource value in a viewmodel then?

[Sanlorng]

It is very simple.