From 35f7ed512ed7445362d6caee1bf60441f4ce979e Mon Sep 17 00:00:00 2001
From: Torsten Grote <t@grobox.de>
Date: Tue, 4 Aug 2020 09:46:38 -0300
Subject: [pos] Implement new refund API (untested since there is no wallet
 support)

Also do a bit of code cleanup and minor refactorings

This also removes the volley HTTP library which is not needed anymore
---
 .../net/taler/merchantpos/refund/RefundFragment.kt | 108 +++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 merchant-terminal/src/main/java/net/taler/merchantpos/refund/RefundFragment.kt

(limited to 'merchant-terminal/src/main/java/net/taler/merchantpos/refund/RefundFragment.kt')

diff --git a/merchant-terminal/src/main/java/net/taler/merchantpos/refund/RefundFragment.kt b/merchant-terminal/src/main/java/net/taler/merchantpos/refund/RefundFragment.kt
new file mode 100644
index 0000000..edb2758
--- /dev/null
+++ b/merchant-terminal/src/main/java/net/taler/merchantpos/refund/RefundFragment.kt
@@ -0,0 +1,108 @@
+/*
+ * 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 android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.activityViewModels
+import androidx.lifecycle.Observer
+import androidx.navigation.fragment.findNavController
+import com.google.android.material.snackbar.BaseTransientBottomBar.LENGTH_LONG
+import com.google.android.material.snackbar.Snackbar
+import kotlinx.android.synthetic.main.fragment_refund.*
+import net.taler.common.Amount
+import net.taler.common.AmountParserException
+import net.taler.common.fadeIn
+import net.taler.common.fadeOut
+import net.taler.common.navigate
+import net.taler.merchantlib.OrderHistoryEntry
+import net.taler.merchantpos.MainViewModel
+import net.taler.merchantpos.R
+import net.taler.merchantpos.refund.RefundFragmentDirections.Companion.actionRefundFragmentToRefundUriFragment
+import net.taler.merchantpos.refund.RefundResult.AlreadyRefunded
+import net.taler.merchantpos.refund.RefundResult.Error
+import net.taler.merchantpos.refund.RefundResult.PastDeadline
+import net.taler.merchantpos.refund.RefundResult.Success
+
+class RefundFragment : Fragment() {
+
+    private val model: MainViewModel by activityViewModels()
+    private val refundManager by lazy { model.refundManager }
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(R.layout.fragment_refund, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        val item = refundManager.toBeRefunded ?: throw IllegalStateException()
+        amountInputView.setText(item.amount.amountStr)
+        currencyView.text = item.amount.currency
+        abortButton.setOnClickListener { findNavController().navigateUp() }
+        refundButton.setOnClickListener { onRefundButtonClicked(item) }
+
+        refundManager.refundResult.observe(viewLifecycleOwner, Observer { result ->
+            onRefundResultChanged(result)
+        })
+    }
+
+    private fun onRefundButtonClicked(item: OrderHistoryEntry) {
+        val inputAmount = try {
+            Amount.fromString(item.amount.currency, amountInputView.text.toString())
+        } catch (e: AmountParserException) {
+            amountView.error = getString(R.string.refund_error_invalid_amount)
+            return
+        }
+        if (inputAmount > item.amount) {
+            amountView.error = getString(R.string.refund_error_max_amount, item.amount.amountStr)
+            return
+        }
+        if (inputAmount.isZero()) {
+            amountView.error = getString(R.string.refund_error_zero)
+            return
+        }
+        amountView.error = null
+        refundButton.fadeOut()
+        progressBar.fadeIn()
+        refundManager.refund(item, inputAmount, reasonInputView.text.toString())
+    }
+
+    private fun onRefundResultChanged(result: RefundResult?): Any = when (result) {
+        is Error -> onError(result.msg)
+        PastDeadline -> onError(getString(R.string.refund_error_deadline))
+        AlreadyRefunded -> onError(getString(R.string.refund_error_already_refunded))
+        is Success -> {
+            progressBar.fadeOut()
+            refundButton.fadeIn()
+            navigate(actionRefundFragmentToRefundUriFragment())
+        }
+        null -> { // no-op
+        }
+    }
+
+    private fun onError(msg: String) {
+        Snackbar.make(requireView(), msg, LENGTH_LONG).show()
+        progressBar.fadeOut()
+        refundButton.fadeIn()
+    }
+
+}
-- 
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