From 4ffca702853771bb3807f3881d710b3fbb6d6191 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian@dold.me>
Date: Tue, 9 Jan 2024 18:37:43 +0100
Subject: -misc. minor fixes, docs

---
 .../src/operations/pay-merchant.ts                 | 48 ++++++++++++++++++++++
 1 file changed, 48 insertions(+)

(limited to 'packages/taler-wallet-core/src/operations/pay-merchant.ts')

diff --git a/packages/taler-wallet-core/src/operations/pay-merchant.ts b/packages/taler-wallet-core/src/operations/pay-merchant.ts
index 5d58f4c2f..a81311702 100644
--- a/packages/taler-wallet-core/src/operations/pay-merchant.ts
+++ b/packages/taler-wallet-core/src/operations/pay-merchant.ts
@@ -30,11 +30,13 @@ import {
   AbsoluteTime,
   AmountJson,
   Amounts,
+  AmountString,
   codecForAbortResponse,
   codecForMerchantContractTerms,
   codecForMerchantOrderRefundPickupResponse,
   codecForMerchantOrderStatusPaid,
   codecForMerchantPayResponse,
+  codecForMerchantPostOrderResponse,
   codecForProposal,
   CoinDepositPermission,
   CoinRefreshRequest,
@@ -53,12 +55,15 @@ import {
   MerchantCoinRefundStatus,
   MerchantContractTerms,
   MerchantPayResponse,
+  MerchantUsingTemplateDetails,
   NotificationType,
+  parsePayTemplateUri,
   parsePayUri,
   parseTalerUri,
   PayCoinSelection,
   PreparePayResult,
   PreparePayResultType,
+  PreparePayTemplateRequest,
   randomBytes,
   RefreshReason,
   SharePaymentResult,
@@ -1209,6 +1214,49 @@ export async function preparePayForUri(
   return checkPaymentByProposalId(ws, proposalId, uriResult.sessionId);
 }
 
+export async function preparePayForTemplate(
+  ws: InternalWalletState,
+  req: PreparePayTemplateRequest,
+): Promise<PreparePayResult> {
+  const url = parsePayTemplateUri(req.talerPayTemplateUri);
+  const templateDetails: MerchantUsingTemplateDetails = {};
+  if (!url) {
+    throw Error("invalid taler-template URI");
+  }
+  if (
+    url.templateParams.amount !== undefined &&
+    typeof url.templateParams.amount === "string"
+  ) {
+    templateDetails.amount = (req.templateParams.amount ??
+      url.templateParams.amount) as AmountString | undefined;
+  }
+  if (
+    url.templateParams.summary !== undefined &&
+    typeof url.templateParams.summary === "string"
+  ) {
+    templateDetails.summary =
+      req.templateParams.summary ?? url.templateParams.summary;
+  }
+  const reqUrl = new URL(`templates/${url.templateId}`, url.merchantBaseUrl);
+  const httpReq = await ws.http.fetch(reqUrl.href, {
+    method: "POST",
+    body: templateDetails,
+  });
+  const resp = await readSuccessResponseJsonOrThrow(
+    httpReq,
+    codecForMerchantPostOrderResponse(),
+  );
+
+  const payUri = stringifyPayUri({
+    merchantBaseUrl: url.merchantBaseUrl,
+    orderId: resp.order_id,
+    sessionId: "",
+    claimToken: resp.token,
+  });
+
+  return await preparePayForUri(ws, payUri);
+}
+
 /**
  * Generate deposit permissions for a purchase.
  *
-- 
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