1 files changed, 171 insertions, 0 deletions
diff --git a/packages/taler-wallet-webextension/src/cta/InvoicePay/state.ts b/packages/taler-wallet-webextension/src/cta/InvoicePay/state.ts
new file mode 100644
index 000000000..99de03d2d
--- /dev/null
+++ b/packages/taler-wallet-webextension/src/cta/InvoicePay/state.ts
@@ -0,0 +1,171 @@
+/*
+ This file is part of GNU Taler
+ (C) 2022 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/>
+ */
+
+import {
+  AbsoluteTime,
+  Amounts,
+  NotificationType,
+  PreparePayResult,
+  PreparePayResultType,
+  TalerProtocolTimestamp,
+} from "@gnu-taler/taler-util";
+import { WalletApiOperation } from "@gnu-taler/taler-wallet-core";
+import { useTranslationContext } from "@gnu-taler/web-util/browser";
+import { useEffect } from "preact/hooks";
+import { alertFromError, useAlertContext } from "../../context/alert.js";
+import { useBackendContext } from "../../context/backend.js";
+import { useAsyncAsHook } from "../../hooks/useAsyncAsHook.js";
+import { Props, State } from "./index.js";
+
+export function useComponentState({
+  talerPayPullUri,
+  onClose,
+  goToWalletManualWithdraw,
+  onSuccess,
+}: Props): State {
+  const api = useBackendContext();
+  const { i18n } = useTranslationContext();
+  const { pushAlertOnError } = useAlertContext();
+  const hook = useAsyncAsHook(async () => {
+    const p2p = await api.wallet.call(WalletApiOperation.PreparePeerPullDebit, {
+      talerUri: talerPayPullUri,
+    });
+    const balance = await api.wallet.call(WalletApiOperation.GetBalances, {});
+    return { p2p, balance };
+  });
+
+  useEffect(() =>
+    api.listener.onUpdateNotification(
+      [NotificationType.TransactionStateTransition],
+      hook?.retry,
+    ),
+  );
+
+  if (!hook) {
+    return {
+      status: "loading",
+      error: undefined,
+    };
+  }
+  if (hook.hasError) {
+    return {
+      status: "error",
+      error: alertFromError(
+        i18n,
+        i18n.str`Could not load the transfer payment status`,
+        hook,
+      ),
+    };
+  }
+  // if (hook.hasError) {
+  //   return {
+  //     status: "loading-uri",
+  //     error: hook,
+  //   };
+  // }
+
+  const { contractTerms, transactionId, amountEffective, amountRaw } =
+    hook.response.p2p;
+
+  const amountStr: string = contractTerms.amount;
+  const amount = Amounts.parseOrThrow(amountStr);
+  const effective = Amounts.parseOrThrow(amountEffective);
+  const raw = Amounts.parseOrThrow(amountRaw);
+  const summary: string | undefined = contractTerms.summary;
+  const expiration: TalerProtocolTimestamp | undefined =
+    contractTerms.purse_expiration;
+
+  const foundBalance = hook.response.balance.balances.find(
+    (b) => Amounts.parseOrThrow(b.available).currency === amount.currency,
+  );
+
+  const paymentPossible: PreparePayResult = {
+    status: PreparePayResultType.PaymentPossible,
+    proposalId: "fakeID",
+    contractTerms: {} as any,
+    contractTermsHash: "asd",
+    amountRaw: hook.response.p2p.amount,
+    amountEffective: hook.response.p2p.amount,
+  } as PreparePayResult;
+
+  const insufficientBalance: PreparePayResult = {
+    status: PreparePayResultType.InsufficientBalance,
+    talerUri: "taler://pay",
+    proposalId: "fakeID",
+    contractTerms: {} as any,
+    amountRaw: hook.response.p2p.amount,
+    noncePriv: "",
+  } as any; //FIXME: check this interface with new values
+
+  const baseResult = {
+    uri: talerPayPullUri,
+    cancel: {
+      onClick: pushAlertOnError(onClose),
+    },
+    effective,
+    raw,
+    goToWalletManualWithdraw,
+    summary,
+    expiration: expiration
+      ? AbsoluteTime.fromProtocolTimestamp(expiration)
+      : undefined,
+  };
+
+  if (!foundBalance) {
+    return {
+      status: "no-balance-for-currency",
+      error: undefined,
+      balance: undefined,
+      ...baseResult,
+      payStatus: insufficientBalance,
+    };
+  }
+
+  const foundAmount = Amounts.parseOrThrow(foundBalance.available);
+
+  //FIXME: should use pay result type since it check for coins exceptions
+  if (Amounts.cmp(foundAmount, amount) < 0) {
+    //payStatus.status === PreparePayResultType.InsufficientBalance) {
+    return {
+      status: "no-enough-balance",
+      error: undefined,
+      balance: foundAmount,
+      ...baseResult,
+      payStatus: insufficientBalance,
+    };
+  }
+
+  async function accept(): Promise<void> {
+    const resp = await api.wallet.call(
+      WalletApiOperation.ConfirmPeerPullDebit,
+      {
+        transactionId,
+      },
+    );
+    onSuccess(resp.transactionId);
+  }
+
+  return {
+    status: "ready",
+    error: undefined,
+    ...baseResult,
+    payStatus: paymentPossible,
+    balance: foundAmount,
+    accept: {
+      onClick: pushAlertOnError(accept),
+    },
+  };
+}