From defbf625bdef0f8a666b72b8ce99de5e01af6b91 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Thu, 29 Aug 2019 23:12:55 +0200
Subject: url-based pay/withdraw, use react hooks

---
 src/webex/pages/pay.tsx | 173 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 173 insertions(+)
 create mode 100644 src/webex/pages/pay.tsx

(limited to 'src/webex/pages/pay.tsx')

diff --git a/src/webex/pages/pay.tsx b/src/webex/pages/pay.tsx
new file mode 100644
index 000000000..d929426c4
--- /dev/null
+++ b/src/webex/pages/pay.tsx
@@ -0,0 +1,173 @@
+/*
+ This file is part of TALER
+ (C) 2015 GNUnet e.V.
+
+ 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.
+
+ 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
+ TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+/**
+ * Page shown to the user to confirm entering
+ * a contract.
+ */
+
+/**
+ * Imports.
+ */
+import * as i18n from "../../i18n";
+
+import { runOnceWhenReady } from "./common";
+
+import { ExchangeRecord, ProposalDownloadRecord } from "../../dbTypes";
+import { ContractTerms } from "../../talerTypes";
+import { CheckPayResult, PreparePayResult } from "../../walletTypes";
+
+import { renderAmount } from "../renderHtml";
+import * as wxApi from "../wxApi";
+
+import React, { useState, useEffect } from "react";
+import * as ReactDOM from "react-dom";
+import URI = require("urijs");
+import { WalletApiError } from "../wxApi";
+
+import * as Amounts from "../../amounts";
+
+function TalerPayDialog({ talerPayUri }: { talerPayUri: string }) {
+  const [payStatus, setPayStatus] = useState<PreparePayResult | undefined>();
+  const [payErrMsg, setPayErrMsg] = useState<string | undefined>("");
+  const [numTries, setNumTries] = useState(0);
+  let totalFees: Amounts.AmountJson | undefined = undefined;
+
+  useEffect(() => {
+    const doFetch = async () => {
+      const p = await wxApi.preparePay(talerPayUri);
+      setPayStatus(p);
+    };
+    doFetch();
+  });
+
+  if (!payStatus) {
+    return <span>Loading payment information ...</span>;
+  }
+
+  if (payStatus.status === "error") {
+    return <span>Error: {payStatus.error}</span>;
+  }
+
+  if (payStatus.status === "payment-possible") {
+    totalFees = payStatus.totalFees;
+  }
+
+  if (payStatus.status === "paid" && numTries === 0) {
+    return (
+      <span>
+        You have already paid for this article. Click{" "}
+        <a href={payStatus.nextUrl}>here</a> to view it again.
+      </span>
+    );
+  }
+
+  const contractTerms = payStatus.contractTerms;
+
+  if (!contractTerms) {
+    return (
+      <span>
+        Error: did not get contract terms from merchant or wallet backend.
+      </span>
+    );
+  }
+
+  let merchantName: React.ReactElement;
+  if (contractTerms.merchant && contractTerms.merchant.name) {
+    merchantName = <strong>{contractTerms.merchant.name}</strong>;
+  } else {
+    merchantName = <strong>(pub: {contractTerms.merchant_pub})</strong>;
+  }
+
+  const amount = (
+    <strong>{renderAmount(Amounts.parseOrThrow(contractTerms.amount))}</strong>
+  );
+
+  const doPayment = async () => {
+    setNumTries(numTries + 1);
+    try {
+      const res = await wxApi.confirmPay(payStatus!.proposalId!, undefined);
+      document.location.href = res.nextUrl;
+    } catch (e) {
+      console.error(e);
+      setPayErrMsg(e.message);
+    }
+  };
+
+  return (
+    <div>
+      <p>
+        <i18n.Translate wrap="p">
+          The merchant <span>{merchantName}</span> offers you to purchase:
+        </i18n.Translate>
+        <div style={{ textAlign: "center" }}>
+          <strong>{contractTerms.summary}</strong>
+        </div>
+        {totalFees ? (
+          <i18n.Translate wrap="p">
+            The total price is <span>{amount} </span>
+            (plus <span>{renderAmount(totalFees)}</span> fees).
+          </i18n.Translate>
+        ) : (
+          <i18n.Translate wrap="p">
+            The total price is <span>{amount}</span>.
+          </i18n.Translate>
+        )}
+      </p>
+
+      {payErrMsg ? (
+        <div>
+          <p>Payment failed: {payErrMsg}</p>
+          <button
+            className="pure-button button-success"
+            onClick={() => doPayment()}
+          >
+            {i18n.str`Retry`}
+          </button>
+        </div>
+      ) : (
+        <div>
+          <button
+            className="pure-button button-success"
+            onClick={() => doPayment()}
+          >
+            {i18n.str`Confirm payment`}
+          </button>
+        </div>
+      )}
+    </div>
+  );
+}
+
+runOnceWhenReady(() => {
+  try {
+    const url = new URI(document.location.href);
+    const query: any = URI.parseQuery(url.query());
+
+    let talerPayUri = query.talerPayUri;
+
+    ReactDOM.render(
+      <TalerPayDialog talerPayUri={talerPayUri} />,
+      document.getElementById("contract")!,
+    );
+  } catch (e) {
+    ReactDOM.render(
+      <span>Fatal error: {e.message}</span>,
+      document.getElementById("contract")!,
+    );
+    console.error(e);
+  }
+});
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