1 files changed, 214 insertions, 0 deletions
diff --git a/packages/aml-backoffice-ui/src/hooks/decisions.ts b/packages/aml-backoffice-ui/src/hooks/decisions.ts
new file mode 100644
index 000000000..24941b29e
--- /dev/null
+++ b/packages/aml-backoffice-ui/src/hooks/decisions.ts
@@ -0,0 +1,214 @@
+/*
+ This file is part of GNU Taler
+ (C) 2022-2024 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/>
+ */
+import { useState } from "preact/hooks";
+
+// FIX default import https://github.com/microsoft/TypeScript/issues/49189
+import {
+  OfficerAccount,
+  OperationOk,
+  TalerExchangeResultByMethod,
+  TalerHttpError,
+} from "@gnu-taler/taler-util";
+import { useExchangeApiContext } from "@gnu-taler/web-util/browser";
+import _useSWR, { SWRHook, mutate } from "swr";
+import { useOfficer } from "./officer.js";
+const useSWR = _useSWR as unknown as SWRHook;
+
+export const PAGINATED_LIST_SIZE = 10;
+// when doing paginated request, ask for one more
+// and use it to know if there are more to request
+export const PAGINATED_LIST_REQUEST = PAGINATED_LIST_SIZE + 1;
+
+/**
+ * @param account
+ * @param args
+ * @returns
+ */
+export function useCurrentDecisionsUnderInvestigation() {
+  const officer = useOfficer();
+  const session = officer.state === "ready" ? officer.account : undefined;
+  const {
+    lib: { exchange: api },
+  } = useExchangeApiContext();
+
+  const [offset, setOffset] = useState<string>();
+
+  async function fetcher([officer, offset, investigation]: [
+    OfficerAccount,
+    string | undefined,
+    boolean | undefined,
+  ]) {
+    return await api.getAmlDecisions(officer, {
+      order: "dec",
+      offset,
+      investigation: true,
+      active: true,
+      limit: PAGINATED_LIST_REQUEST,
+    });
+  }
+
+  const { data, error } = useSWR<
+    TalerExchangeResultByMethod<"getAmlDecisions">,
+    TalerHttpError
+  >(
+    !session
+      ? undefined
+      : [session, offset, "getAmlDecisions"],
+    fetcher,
+  );
+
+  if (error) return error;
+  if (data === undefined) return undefined;
+  if (data.type !== "ok") return data;
+
+  return buildPaginatedResult(data.body.records, offset, setOffset, (d) =>
+    String(d.rowid),
+  );
+}
+
+/**
+ * @param account
+ * @param args
+ * @returns
+ */
+export function useCurrentDecisions() {
+  const officer = useOfficer();
+  const session = officer.state === "ready" ? officer.account : undefined;
+  const {
+    lib: { exchange: api },
+  } = useExchangeApiContext();
+
+  const [offset, setOffset] = useState<string>();
+
+  async function fetcher([officer, offset]: [
+    OfficerAccount,
+    string | undefined,
+    boolean | undefined,
+  ]) {
+    return await api.getAmlDecisions(officer, {
+      order: "dec",
+      offset,
+      active: true,
+      limit: PAGINATED_LIST_REQUEST,
+    });
+  }
+
+  const { data, error } = useSWR<
+    TalerExchangeResultByMethod<"getAmlDecisions">,
+    TalerHttpError
+  >(
+    !session
+      ? undefined
+      : [session, offset, "getAmlDecisions"],
+    fetcher,
+  );
+
+  if (error) return error;
+  if (data === undefined) return undefined;
+  if (data.type !== "ok") return data;
+
+  return buildPaginatedResult(data.body.records, offset, setOffset, (d) =>
+    String(d.rowid),
+  );
+}
+
+export function revalidateAccountDecisions() {
+  return mutate(
+    (key) => Array.isArray(key) && key[key.length - 1] === "getAmlDecisions",
+    undefined,
+    { revalidate: true },
+  );
+}
+/**
+ * @param account
+ * @param args
+ * @returns
+ */
+export function useAccountDecisions(accountStr: string) {
+  const officer = useOfficer();
+  const session = officer.state === "ready" ? officer.account : undefined;
+  const {
+    lib: { exchange: api },
+  } = useExchangeApiContext();
+
+  const [offset, setOffset] = useState<string>();
+
+  async function fetcher([officer, account, offset]: [
+    OfficerAccount,
+    string,
+    string | undefined,
+  ]) {
+    return await api.getAmlDecisions(officer, {
+      order: "dec",
+      offset,
+      account,
+      limit: PAGINATED_LIST_REQUEST,
+    });
+  }
+
+  const { data, error } = useSWR<
+    TalerExchangeResultByMethod<"getAmlDecisions">,
+    TalerHttpError
+  >(
+    !session ? undefined : [session, accountStr, offset, "getAmlDecisions"],
+    fetcher,
+  );
+
+  if (error) return error;
+  if (data === undefined) return undefined;
+  if (data.type !== "ok") return data;
+
+  return buildPaginatedResult(data.body.records, offset, setOffset, (d) =>
+    String(d.rowid),
+  );
+}
+
+type PaginatedResult<T> = OperationOk<T> & {
+  isLastPage: boolean;
+  isFirstPage: boolean;
+  loadNext(): void;
+  loadFirst(): void;
+};
+
+//TODO: consider sending this to web-util
+export function buildPaginatedResult<R, OffId>(
+  data: R[],
+  offset: OffId | undefined,
+  setOffset: (o: OffId | undefined) => void,
+  getId: (r: R) => OffId,
+): PaginatedResult<R[]> {
+  const isLastPage = data.length < PAGINATED_LIST_REQUEST;
+  const isFirstPage = offset === undefined;
+
+  const result = structuredClone(data);
+  if (result.length == PAGINATED_LIST_REQUEST) {
+    result.pop();
+  }
+  return {
+    type: "ok",
+    body: result,
+    isLastPage,
+    isFirstPage,
+    loadNext: () => {
+      if (!result.length) return;
+      const id = getId(result[result.length - 1]);
+      setOffset(id);
+    },
+    loadFirst: () => {
+      setOffset(undefined);
+    },
+  };
+}