1 files changed, 103 insertions, 0 deletions
diff --git a/packages/merchant-backoffice-ui/src/hooks/product.ts b/packages/merchant-backoffice-ui/src/hooks/product.ts
new file mode 100644
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+++ b/packages/merchant-backoffice-ui/src/hooks/product.ts
@@ -0,0 +1,103 @@
+/*
+ This file is part of GNU Taler
+ (C) 2021-2024 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/>
+ */
+
+// FIX default import https://github.com/microsoft/TypeScript/issues/49189
+import { AccessToken, OperationOk, TalerHttpError, TalerMerchantApi, TalerMerchantManagementErrorsByMethod, TalerMerchantManagementResultByMethod, opFixedSuccess } from "@gnu-taler/taler-util";
+import { useState } from "preact/hooks";
+import _useSWR, { SWRHook, mutate } from "swr";
+import { useSessionContext } from "../context/session.js";
+import { PAGINATED_LIST_REQUEST } from "../utils/constants.js";
+import { buildPaginatedResult } from "./webhooks.js";
+const useSWR = _useSWR as unknown as SWRHook;
+
+type ProductWithId = TalerMerchantApi.ProductDetail & { id: string, serial: number };
+function notUndefined(c: ProductWithId | undefined): c is ProductWithId {
+  return c !== undefined;
+}
+
+export function revalidateInstanceProducts() {
+  return mutate(
+    (key) => Array.isArray(key) && key[key.length - 1] === "listProductsWithId",
+    undefined,
+    { revalidate: true },
+  );
+}
+export function useInstanceProducts() {
+  const { state: session } = useSessionContext();
+  const { lib: { instance } } = useSessionContext();
+
+  const [offset, setOffset] = useState<number | undefined>();
+
+  async function fetcher([token, bid]: [AccessToken, number]) {
+    const list = await instance.listProducts(token, {
+      limit: PAGINATED_LIST_REQUEST,
+      offset: bid === undefined ? undefined: String(bid),
+      order: "dec",
+    });
+    if (list.type !== "ok") {
+      return list;
+    }
+    const all: Array<ProductWithId | undefined> = await Promise.all(
+      list.body.products.map(async (c) => {
+        const r = await instance.getProductDetails(token, c.product_id);
+        if (r.type === "fail") {
+          return undefined;
+        }
+        return { ...r.body, id: c.product_id, serial: c.product_serial };
+      }),
+    );
+    const products = all.filter(notUndefined);
+
+    return opFixedSuccess({ products });
+  }
+
+  const { data, error } = useSWR<
+    OperationOk<{ products: ProductWithId[] }> |
+    TalerMerchantManagementErrorsByMethod<"listProducts">,
+    TalerHttpError
+  >([session.token, offset, "listProductsWithId"], fetcher);
+
+  if (error) return error;
+  if (data === undefined) return undefined;
+  if (data.type !== "ok") return data;
+
+  return buildPaginatedResult(data.body.products, offset, setOffset, (d) => d.serial)
+}
+
+export function revalidateProductDetails() {
+  return mutate(
+    (key) => Array.isArray(key) && key[key.length - 1] === "getProductDetails",
+    undefined,
+    { revalidate: true },
+  );
+}
+export function useProductDetails(productId: string) {
+  const { state: session } = useSessionContext();
+  const { lib: { instance } } = useSessionContext();
+
+  async function fetcher([pid, token]: [string, AccessToken]) {
+    return await instance.getProductDetails(token, pid);
+  }
+
+  const { data, error } = useSWR<
+    TalerMerchantManagementResultByMethod<"getProductDetails">,
+    TalerHttpError
+  >([productId, session.token, "getProductDetails"], fetcher);
+
+  if (data) return data;
+  if (error) return error;
+  return undefined;
+}