1 files changed, 91 insertions, 0 deletions
diff --git a/merchant-terminal/src/main/java/net/taler/merchantpos/refund/RefundManager.kt b/merchant-terminal/src/main/java/net/taler/merchantpos/refund/RefundManager.kt
new file mode 100644
index 0000000..ea2d398
--- /dev/null
+++ b/merchant-terminal/src/main/java/net/taler/merchantpos/refund/RefundManager.kt
@@ -0,0 +1,91 @@
+/*
+ * 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.merchantpos.refund
+
+import androidx.annotation.UiThread
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import net.taler.common.Amount
+import net.taler.merchantlib.MerchantApi
+import net.taler.merchantlib.OrderHistoryEntry
+import net.taler.merchantlib.RefundRequest
+import net.taler.merchantpos.config.ConfigManager
+
+sealed class RefundResult {
+    class Error(val msg: String) : RefundResult()
+    object PastDeadline : RefundResult()
+    object AlreadyRefunded : RefundResult()
+    class Success(
+        val refundUri: String,
+        val item: OrderHistoryEntry,
+        val amount: Amount,
+        val reason: String
+    ) : RefundResult()
+}
+
+class RefundManager(
+    private val configManager: ConfigManager,
+    private val scope: CoroutineScope,
+    private val api: MerchantApi
+) {
+
+    var toBeRefunded: OrderHistoryEntry? = null
+        private set
+
+    private val mRefundResult = MutableLiveData<RefundResult>()
+    internal val refundResult: LiveData<RefundResult> = mRefundResult
+
+    @UiThread
+    internal fun startRefund(item: OrderHistoryEntry) {
+        toBeRefunded = item
+        mRefundResult.value = null
+    }
+
+    @UiThread
+    internal fun abortRefund() {
+        toBeRefunded = null
+        mRefundResult.value = null
+    }
+
+    @UiThread
+    internal fun refund(item: OrderHistoryEntry, amount: Amount, reason: String) {
+        val merchantConfig = configManager.merchantConfig!!
+        val request = RefundRequest(amount, reason)
+        scope.launch(Dispatchers.IO) {
+            api.giveRefund(merchantConfig, item.orderId, request).handle(::onRefundError) {
+                val result = RefundResult.Success(
+                    refundUri = it.talerRefundUri,
+                    item = item,
+                    amount = amount,
+                    reason = reason
+                )
+                mRefundResult.postValue(result)
+            }
+        }
+    }
+
+    @UiThread
+    private fun onRefundError(msg: String) {
+        if (msg.contains("2602")) {
+            mRefundResult.postValue(RefundResult.AlreadyRefunded)
+        } else mRefundResult.postValue(RefundResult.Error(msg))
+    }
+
+}