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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.anastasis.backend
import kotlinx.coroutines.DelicateCoroutinesApi
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext
import kotlinx.serialization.json.decodeFromJsonElement
import net.taler.anastasis.Utils.encodeToNativeJson
import net.taler.anastasis.models.ReducerState
import net.taler.common.ApiResponse
import net.taler.common.ApiResponse.*
import net.taler.common.TalerErrorCode.NONE
import org.json.JSONObject
@OptIn(DelicateCoroutinesApi::class)
class AnastasisReducerApi() {
private val backendManager = BackendManager()
init {
GlobalScope.launch(Dispatchers.IO) {
backendManager.run()
}
}
suspend fun sendRequest(operation: String, args: JSONObject? = null): ApiResponse {
return backendManager.send(operation, args)
}
suspend inline fun startBackup(): ReducerState = withContext(Dispatchers.Default) {
val json = BackendManager.json
when (val response = sendRequest("anastasisStartBackup")) {
is Response -> json.decodeFromJsonElement(response.result)
is Error -> error("invalid reducer response")
}
}
suspend inline fun startRecovery(): ReducerState = withContext(Dispatchers.Default) {
val json = BackendManager.json
when (val response = sendRequest("anastasisStartRecovery")) {
is Response -> json.decodeFromJsonElement(response.result)
is Error -> error("invalid reducer response")
}
}
suspend inline fun reduceAction(
state: ReducerState,
action: String,
noinline args: (JSONObject.() -> JSONObject)? = null,
): WalletResponse<ReducerState> = withContext(Dispatchers.Default) {
val json = BackendManager.json
val body = JSONObject().apply {
put("state", JSONObject(json.encodeToString(ReducerState.serializer(), state)))
put("action", action)
if (args != null) put("args", args.invoke(JSONObject()))
}
try {
when (val response = sendRequest("anastasisReduce", body)) {
is Response -> {
val t = json.decodeFromJsonElement<ReducerState>(response.result)
WalletResponse.Success(t)
}
is Error -> error("invalid reducer response")
}
} catch (e: Exception) {
val info = TalerErrorInfo(NONE, "", e.toString())
WalletResponse.Error(info)
}
}
suspend inline fun <reified T> reduceAction(
state: ReducerState,
action: String,
args: T? = null,
): WalletResponse<ReducerState> = withContext(Dispatchers.Default) {
val json = BackendManager.json
val body = JSONObject().apply {
put("state", json.encodeToNativeJson(state))
put("action", action)
if (args != null) put("args", json.encodeToNativeJson(args))
}
try {
when (val response = sendRequest("anastasisReduce", body)) {
is Response -> {
val t = json.decodeFromJsonElement<ReducerState>(response.result)
WalletResponse.Success(t)
}
is Error -> error("invalid reducer response")
}
} catch (e: Exception) {
val info = TalerErrorInfo(NONE, "", e.toString())
WalletResponse.Error(info)
}
}
}
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