WR-377: Prevent duplicate order creation on request timeout

shared/localization.yml

@@ -179,6 +179,9 @@ order:
     inputPlaceholder:
       de: 1x ohne Tomaten
       en: 1x without tomato
+  alreadyCreated:
+    en: Order was already sent.
+    de: Bestellung wurde bereits gesendet.
   couldNotFindProduct:
     title:
       de: Produkt nicht gefunden.

shared/src/androidMain/kotlin/org/datepollsystems/waiterrobot/shared/utils/UUID.android.kt

@@ -0,0 +1,5 @@
+package org.datepollsystems.waiterrobot.shared.utils
+
+import java.util.UUID
+
+actual fun randomUUID(): String = UUID.randomUUID().toString()

shared/src/commonMain/kotlin/org/datepollsystems/waiterrobot/shared/core/data/api/ApiException.kt

@@ -85,4 +85,8 @@ internal sealed class ApiException : Exception() {
     @Serializable
     @SerialName("STRIPE_DISABLED")
     class StripeDisabled : ApiException()
+
+    @Serializable
+    @SerialName("ORDER_ALREADY_SUBMITTED")
+    class OrderAlreadySubmitted : ApiException()
 }

shared/src/commonMain/kotlin/org/datepollsystems/waiterrobot/shared/features/order/api/models/OrderRequestDto.kt

@@ -6,7 +6,8 @@ import org.datepollsystems.waiterrobot.shared.core.data.api.RequestBodyDto
 @Serializable
 class OrderRequestDto(
     val tableId: Long,
-    val products: List<OrderItemDto>
+    val products: List<OrderItemDto>,
+    val clientOrderId: String,
 ) : RequestBodyDto {
     @Serializable
     class OrderItemDto(

shared/src/commonMain/kotlin/org/datepollsystems/waiterrobot/shared/features/order/repository/OrderRepository.kt

@@ -8,8 +8,8 @@ import org.datepollsystems.waiterrobot.shared.features.table.models.Table
 
 internal class OrderRepository(private val orderApi: OrderApi) : AbstractRepository() {
 
-    suspend fun sendOrder(table: Table, order: List<OrderItem>) {
+    suspend fun sendOrder(table: Table, order: List<OrderItem>, orderId: String) {
         val items = order.map { OrderRequestDto.OrderItemDto(it.product.id, it.amount, it.note) }
-        orderApi.sendOrder(OrderRequestDto(table.id, items))
+        orderApi.sendOrder(OrderRequestDto(table.id, items, orderId))
     }
 }

shared/src/commonMain/kotlin/org/datepollsystems/waiterrobot/shared/features/order/viewmodel/OrderViewModel.kt

@@ -16,6 +16,7 @@ import org.datepollsystems.waiterrobot.shared.generated.localization.L
 import org.datepollsystems.waiterrobot.shared.generated.localization.desc
 import org.datepollsystems.waiterrobot.shared.generated.localization.descOrderSent
 import org.datepollsystems.waiterrobot.shared.utils.extensions.emptyToNull
+import org.datepollsystems.waiterrobot.shared.utils.randomUUID
 import org.orbitmvi.orbit.syntax.simple.SimpleContext
 import org.orbitmvi.orbit.syntax.simple.SimpleSyntax
 import org.orbitmvi.orbit.syntax.simple.intent
@@ -29,6 +30,8 @@ class OrderViewModel internal constructor(
     private val initialItemId: Long?
 ) : AbstractViewModel<OrderState, OrderEffect>(OrderState()) {
 
+    private var currentOrderId = randomUUID()
+
     override suspend fun SimpleSyntax<OrderState, NavOrViewModelEffect<OrderEffect>>.onCreate() {
         coroutineScope {
             launch { productRepository.listen() }
@@ -99,7 +102,8 @@ class OrderViewModel internal constructor(
         }
 
         try {
-            orderRepository.sendOrder(table, order)
+            orderRepository.sendOrder(table, order, currentOrderId)
+            currentOrderId = randomUUID()
 
             reduce { state.copy(_currentOrder = Resource.Success(emptyMap())) }
             navigator.popUpTo(Screen.TableDetailScreen(table), inclusive = false)
@@ -113,6 +117,10 @@ class OrderViewModel internal constructor(
             } else {
                 reduce { stockToLow(stockToLowProduct, e.remaining) }
             }
+        } catch (_: ApiException.OrderAlreadySubmitted) {
+            logger.w("Order was already submitted")
+            reduce { state.copy(_currentOrder = Resource.Success(emptyMap())) }
+            navigator.popUpTo(Screen.TableDetailScreen(table), inclusive = false)
         }
     }
 

shared/src/commonMain/kotlin/org/datepollsystems/waiterrobot/shared/utils/ExceptionMessageMapper.kt

@@ -6,6 +6,7 @@ import org.datepollsystems.waiterrobot.shared.core.data.api.ApiException
 import org.datepollsystems.waiterrobot.shared.core.di.getLogger
 import org.datepollsystems.waiterrobot.shared.generated.localization.L
 import org.datepollsystems.waiterrobot.shared.generated.localization.accountNotActivated
+import org.datepollsystems.waiterrobot.shared.generated.localization.alreadyCreated
 import org.datepollsystems.waiterrobot.shared.generated.localization.amountToLow
 import org.datepollsystems.waiterrobot.shared.generated.localization.desc
 import org.datepollsystems.waiterrobot.shared.generated.localization.disabled
@@ -38,6 +39,7 @@ internal fun ApiException.getLocalizedUserMessage(): String = when (this) {
     is ApiException.StripeDisabled -> L.stripeInit.error.disabled()
     is ApiException.StripeNotActivated -> L.stripeInit.error.disabledForEvent()
     is ApiException.ProductStockToLow -> L.order.stockToLow.title()
+    is ApiException.OrderAlreadySubmitted -> L.order.alreadyCreated()
 
     // Unknown exceptions or exceptions that should normally not happen
     is ApiException.Generic,

shared/src/commonMain/kotlin/org/datepollsystems/waiterrobot/shared/utils/UUID.kt

@@ -0,0 +1,3 @@
+package org.datepollsystems.waiterrobot.shared.utils
+
+expect fun randomUUID(): String

shared/src/iosMain/kotlin/org/datepollsystems/waiterrobot/shared/utils/UUID.ios.kt

@@ -0,0 +1,5 @@
+package org.datepollsystems.waiterrobot.shared.utils
+
+import platform.Foundation.NSUUID
+
+actual fun randomUUID(): String = NSUUID().UUIDString