Hello all, is it possible to have a path param tha...

# http4k

[Matt]

Hello all, is it possible to have a path param that maps to a enum and is not case sensitive?

[dave]

sort of - you can map it:

enum class Example {
    First, Second;
    
    fun toExt() = name.decapitalize()
    
    companion object {
        fun fromCode(value: String) = Example.valueOf(value.capitalize())
    }
}

val a = Path.enum<Example>().map(Example::toExt, Example::fromCode).of("example")

[Matt]

Thanks @dave I'll give this a shot

[dave]

that's also safer because if you refactor the enum name you'll break the contract

[Matt]

a will be a String here though?

[dave]

nope - the output type of the lens is Example - it just maps the value inside from the string that it gets from the input type (which is a string)

[Matt]

Intellij seems to think it's a String but this may be a misunderstanding on my part

val a: BiDiPathLens<String> = Path.enum<Example>().map(Example::toExt, Example::fromCode).of("example")

[dave]

whoops - my mistake:

enum class Example {
    First, Second;

    companion object {
        fun fromCode(value: String) = valueOf(value.capitalize())
    }
}

val foobar = Path.map(Example::fromCode).of("example")

[dave]

I was mapping the enum by mistake

[dave]

you don't need the injection

[Matt]

Thanks @dave