Hi where am i going wrong? :man-facepalming:

# arrow

[Tower Guidev2]

Hi
where am i going wrong?
🤦‍♂️

[Tower Guidev2]

Im investigating

api platform("io.arrow-kt:arrow-stack:1.1.3-alpha.37")
api "io.arrow-kt:arrow-core"
api 'io.arrow-kt:arrow-core-retrofit'

and have the following to test out both Either and ResponseE

[Tower Guidev2]

my code resembles this...

interface DiscogsDataApi {

    suspend fun searchE(accessToken: String = ACCESS_TOKEN, options: Map<String, String>): ResponseE<NetworkException, Response<SearchResponse>>
    suspend fun search(accessToken: String = ACCESS_TOKEN, options: Map<String, String>): Either<NetworkException, Response<SearchResponse>>
}

interface DiscogsApi {

    @GET("database/search")
    suspend fun search(@Header(HEADER_AUTHORISATION) accessToken: String, @QueryMap options: Map<String, String>): Response<SearchResponse>

@GET("database/search")
    suspend fun searchE(@Header(HEADER_AUTHORISATION) accessToken: String, @QueryMap options: Map<String, String>): ResponseE<NetworkException, Response<SearchResponse>>

}

[Tower Guidev2]

and this...

class DiscogsRepository @Inject constructor(private val service: DiscogsApi) : DiscogsDataApi {

    override suspend fun searchE(accessToken: String, options: Map<String, String>): ResponseE<NetworkException, Response<SearchResponse>> = service.searchE(accessToken, options)

    override suspend fun search(accessToken: String, options: Map<String, String>): Either<NetworkException, Response<SearchResponse>> = withContext(NETWORK) {
        Either.catch { service.search(accessToken, options) }.mapLeft { unknown -> unknown.mapNetworkException() }
    }

}

[Tower Guidev2]

my call to search works fine as shown here

override suspend fun doActualWork(): Result {

    val work: Either<DatasourceException, *> = either {
        val response = repository.search(options = mapOf("q" to "Nirvana")).bind()
        persistResponse(response).bind()
    }

    return work.fold(ifLeft = { Result.failure() }, ifRight = { Result.success() })
}

private suspend fun persistResponse(response: Response<SearchResponse>): Either<DatasourceException, Long> =
    Either.conditionally(
        isHttpResponseOK(response),
        { manageHTTPError(response).run { NetworkException() } },
        {

            1L
        }
    )

[Tower Guidev2]

however my call to searchE fails with...

[Tower Guidev2]

java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException: Unable to create converter for retrofit2.Response<com.common.shared.resource.model.network.SearchResponse>
for method DiscogsApi.searchE

[Tower Guidev2]

and this cause..

Caused by: kotlinx.serialization.SerializationException: Serializer for class 'Response' is not found.
Mark the class as @Serializable or provide the serializer explicitly.

[stojan]

I think this should work:

suspend fun searchE(accessToken: String = ACCESS_TOKEN, options: Map<String, String>): ResponseE<NetworkException, SearchResponse>