feat: support kotlin

dm-kt/dm-soc/user/src/main/kotlin/com/ysz/dm/soc/user/vshop/OrderCreateFacade.kt

@@ -0,0 +1,61 @@
+package com.ysz.dm.soc.user.vshop
+
+data class OrderItemDto(
+    val inventoryId: Long,
+    val quantity: Int,
+    val price: String,
+    /*property version num, 乐观锁, 防止价格改变造成观感 不一致*/
+    val version: Long
+)
+
+
+data class OrderCreateDto(
+    val userId: Long,
+    val orderItems: List<OrderItemDto>,
+    /*可能支付的领域在其他的地方，但是也可以用*/
+    val pspType: PaymentServiceProvider
+)
+
+enum class PaymentServiceProvider
+data class PrepareOrderResultDto(
+    val orderId: String,
+    val paymentOrderId: String,
+)
+
+data class InventorySnapshot(
+    val inventoryId: Long,
+    val version: Long,
+    val createAt: Long,
+    val updateAt: Long,
+    val inventoryName: String,
+    val inventoryDesc: String?,
+    val sellPrices: String,
+    val normalPrices: String,
+)
+
+interface InventoryService {
+    fun checkUserCanBuy(userId: Long, orderItems: List<OrderItemDto>): Boolean
+}
+
+interface PaymentService {
+}
+
+class OrderCreateFacade(
+    private val inventoryService: InventoryService
+) {
+
+    fun orderCreate(cmd: OrderCreateDto) {
+        /*1. maybe*/
+        inventoryService.checkUserCanBuy(cmd.userId, cmd.orderItems)
+        /*2. check user can user this payment type*/
+        /*3. */
+        /*4. Get Inventory Snapshot*/
+        /*5. Prepare for OrderId, PaymentId */
+        /*6. Sign For Payment and ...*/
+        /*7. Create Order*/
+        /*8. Create Payment*/
+        /*9. Sync Finish */
+    }
+
+
+}