KotlinxSerializer.kt

package voodoo.util.json

import io.ktor.client.call.TypeInfo
import io.ktor.client.features.json.JsonSerializer
import io.ktor.client.response.HttpResponse
import io.ktor.client.response.readText
import io.ktor.http.ContentType
import io.ktor.http.content.OutgoingContent
import io.ktor.http.content.TextContent
import kotlinx.serialization.KSerializer
import kotlinx.serialization.SerialContext
import kotlinx.serialization.UpdateMode
import kotlinx.serialization.json.JSON
import kotlinx.serialization.serializer
import kotlin.reflect.KClass

class KotlinxSerializer (
        unquoted: Boolean = false,
        indented: Boolean = false,
        indent: String = "    ",
        nonstrict: Boolean = false,
        updateMode: UpdateMode = UpdateMode.OVERWRITE,
        context: SerialContext? = null,
        block: SerialContext.() -> Unit = {}
) : JsonSerializer {

    private val json = JSON(
            unquoted = unquoted,
            indented = indented,
            indent = indent,
            nonstrict = nonstrict,
            updateMode = updateMode,
            context = context
    )

    init {
        json.context?.apply {
            block()
        }
    }

    override fun write(data: Any): OutgoingContent {
        val clazz: KClass<*> = data::class
        val serializer = clazz.serializer()
        @Suppress("UNCHECKED_CAST")
        return TextContent(json.stringify(serializer as KSerializer<Any>, data), ContentType.Application.Json)
    }

    override suspend fun read(type: TypeInfo, response: HttpResponse): Any {
        return json.parse(type.type.serializer(), response.readText())
    }

}