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/*
* This file is part of GNU Taler
* (C) 2020 Taler Systems S.A.
*
* GNU Taler is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 3, or (at your option) any later version.
*
* GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
package net.taler.wallet.backend
import kotlinx.serialization.KSerializer
import kotlinx.serialization.SerialName
import kotlinx.serialization.Serializable
import kotlinx.serialization.descriptors.PrimitiveKind.STRING
import kotlinx.serialization.descriptors.PrimitiveSerialDescriptor
import kotlinx.serialization.encoding.Decoder
import kotlinx.serialization.encoding.Encoder
import kotlinx.serialization.json.JsonDecoder
import kotlinx.serialization.json.JsonObject
import org.json.JSONObject
@Serializable
sealed class WalletResponse<T> {
@Serializable
@SerialName("response")
data class Success<T>(
val result: T,
) : WalletResponse<T>()
@Serializable
@SerialName("error")
data class Error<T>(
val error: TalerErrorInfo,
) : WalletResponse<T>()
fun onSuccess(block: (result: T) -> Unit): WalletResponse<T> {
if (this is Success) block(this.result)
return this
}
fun onError(block: (result: TalerErrorInfo) -> Unit): WalletResponse<T> {
if (this is Error) block(this.error)
return this
}
}
@Serializable
data class TalerErrorInfo(
// Numeric error code defined defined in the
// GANA gnu-taler-error-codes registry.
val code: Int,
// English description of the error code.
val hint: String? = null,
// English diagnostic message that can give details
// for the instance of the error.
val message: String? = null,
// Error details
@Serializable(JSONObjectDeserializer::class)
val details: JSONObject? = null,
) {
val userFacingMsg: String
get() {
return StringBuilder().apply {
append(code)
hint?.let { append(" (").append(it).append(")") }
message?.let { append(" ").append(it) }
details?.let { details ->
if (details.length() > 0) {
append("\n\n")
details.optJSONObject("errorResponse")?.let { errorResponse ->
append(errorResponse.optString("code")).append(" ")
append(errorResponse.optString("hint"))
} ?: append(details.toString(2))
}
}
}.toString()
}
}
class JSONObjectDeserializer : KSerializer<JSONObject> {
override val descriptor = PrimitiveSerialDescriptor("JSONObjectDeserializer", STRING)
override fun deserialize(decoder: Decoder): JSONObject {
val input = decoder as JsonDecoder
val tree = input.decodeJsonElement() as JsonObject
return JSONObject(tree.toString())
}
override fun serialize(encoder: Encoder, value: JSONObject) {
error("not supported")
}
}
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