Add sealed classes support to serialization

Could you add support of “sealed” class to the FirebaseDecoder.structureDecoder and FirebaseEncoder.structureEncoder functions?

I would try it with some think like this:

fun FirebaseEncoder.structureEncoder(descriptor: SerialDescriptor, @Suppress("UNUSED_PARAMETER") vararg typeParams: KSerializer<*>): CompositeEncoder = when(descriptor.kind) {
    StructureKind.LIST, PolymorphicKind.SEALED -> mutableListOf<Any?>()
        .also { value = it }
        .let { FirebaseCompositeEncoder(shouldEncodeElementDefault, positiveInfinity) { _, index, value -> it.add(index, value) } }
    StructureKind.MAP -> mutableListOf<Any?>()
        .let { FirebaseCompositeEncoder(shouldEncodeElementDefault, positiveInfinity, { value = it.chunked(2).associate { (k, v) -> k to v } }) { _, _, value -> it.add(value) } }
    StructureKind.CLASS,  StructureKind.OBJECT -> mutableMapOf<Any?, Any?>()
        .also { value = it }
        .let { FirebaseCompositeEncoder(shouldEncodeElementDefault, positiveInfinity) { _, index, value -> it[descriptor.getElementName(index)] = value } }
    else -> TODO("The firebase-kotlin-sdk does not support $descriptor for serialization yet")
}

This case is optimized for plain Kotlin.

Unfortunately, I also have some building problems too, so I cannot implement them myself

[walkingbrad]

Hey y’all. Is this a fix we can get back into in the pipeline? I just started using this library (which has worked pretty great so far) but there are couple of hitches such as the inability to deserialize to a sealed class (which I might expect is a fairly common expectation today).

[nbransby]

closing as support has been added