1 files changed, 173 insertions, 0 deletions
diff --git a/packages/taler-wallet-webextension/src/popup/Balance.tsx b/packages/taler-wallet-webextension/src/popup/Balance.tsx
new file mode 100644
index 000000000..77d2c4201
--- /dev/null
+++ b/packages/taler-wallet-webextension/src/popup/Balance.tsx
@@ -0,0 +1,173 @@
+/*
+ This file is part of TALER
+ (C) 2016 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/>
+ */
+
+import {
+  Amounts,
+  BalancesResponse,
+  Balance, i18n, AmountJson, amountFractionalBase
+} from "@gnu-taler/taler-util";
+import { Component, JSX } from "preact";
+import { PageLink, renderAmount } from "../renderHtml";
+import * as wxApi from "../wxApi";
+
+
+/**
+ * Render an amount as a large number with a small currency symbol.
+ */
+function bigAmount(amount: AmountJson): JSX.Element {
+  const v = amount.value + amount.fraction / amountFractionalBase;
+  return (
+    <span>
+      <span style={{ fontSize: "5em", display: "block" }}>{v}</span>{" "}
+      <span>{amount.currency}</span>
+    </span>
+  );
+}
+
+function EmptyBalanceView(): JSX.Element {
+  return (
+    <p><i18n.Translate>
+      You have no balance to show. Need some{" "}
+      <PageLink pageName="/welcome">help</PageLink> getting started?
+    </i18n.Translate></p>
+  );
+}
+
+
+export class BalancePage extends Component<any, any> {
+  private balance?: BalancesResponse;
+  private gotError = false;
+  private canceler: (() => void) | undefined = undefined;
+  private unmount = false;
+  private updateBalanceRunning = false;
+
+  componentWillMount(): void {
+    this.canceler = wxApi.onUpdateNotification(() => this.updateBalance());
+    this.updateBalance();
+  }
+
+  componentWillUnmount(): void {
+    console.log("component WalletBalanceView will unmount");
+    if (this.canceler) {
+      this.canceler();
+    }
+    this.unmount = true;
+  }
+
+  async updateBalance(): Promise<void> {
+    if (this.updateBalanceRunning) {
+      return;
+    }
+    this.updateBalanceRunning = true;
+    let balance: BalancesResponse;
+    try {
+      balance = await wxApi.getBalance();
+    } catch (e) {
+      if (this.unmount) {
+        return;
+      }
+      this.gotError = true;
+      console.error("could not retrieve balances", e);
+      this.setState({});
+      return;
+    } finally {
+      this.updateBalanceRunning = false;
+    }
+    if (this.unmount) {
+      return;
+    }
+    this.gotError = false;
+    console.log("got balance", balance);
+    this.balance = balance;
+    this.setState({});
+  }
+
+  formatPending(entry: Balance): JSX.Element {
+    let incoming: JSX.Element | undefined;
+    let payment: JSX.Element | undefined;
+
+    const available = Amounts.parseOrThrow(entry.available);
+    const pendingIncoming = Amounts.parseOrThrow(entry.pendingIncoming);
+    const pendingOutgoing = Amounts.parseOrThrow(entry.pendingOutgoing);
+
+    console.log(
+      "available: ",
+      entry.pendingIncoming ? renderAmount(entry.available) : null
+    );
+    console.log(
+      "incoming: ",
+      entry.pendingIncoming ? renderAmount(entry.pendingIncoming) : null
+    );
+
+    if (!Amounts.isZero(pendingIncoming)) {
+      incoming = (
+        <span><i18n.Translate>
+          <span style={{ color: "darkgreen" }}>
+            {"+"}
+            {renderAmount(entry.pendingIncoming)}
+          </span>{" "}
+          incoming
+        </i18n.Translate></span>
+      );
+    }
+
+    const l = [incoming, payment].filter((x) => x !== undefined);
+    if (l.length === 0) {
+      return <span />;
+    }
+
+    if (l.length === 1) {
+      return <span>({l})</span>;
+    }
+    return (
+      <span>
+        ({l[0]}, {l[1]})
+      </span>
+    );
+  }
+
+  render(): JSX.Element {
+    const wallet = this.balance;
+    if (this.gotError) {
+      return (
+        <div className="balance">
+          <p>{i18n.str`Error: could not retrieve balance information.`}</p>
+          <p>
+            Click <PageLink pageName="welcome.html">here</PageLink> for help and
+            diagnostics.
+          </p>
+        </div>
+      );
+    }
+    if (!wallet) {
+      return <span></span>;
+    }
+
+    const listing = wallet.balances.map((entry) => {
+      const av = Amounts.parseOrThrow(entry.available);
+      return (
+        <p key={av.currency}>
+          {bigAmount(av)} {this.formatPending(entry)}
+        </p>
+      );
+    });
+    return listing.length > 0 ? (
+      <div className="balance">{listing}</div>
+    ) : (
+      <EmptyBalanceView />
+    );
+  }
+}