fix AML spa memo and fix #8615

1 files changed, 39 insertions, 48 deletions

diff --git a/packages/aml-backoffice-ui/src/hooks/useCases.ts b/packages/aml-backoffice-ui/src/hooks/useCases.ts
index 68deb7db9..2bc9b5f0f 100644
--- a/packages/aml-backoffice-ui/src/hooks/useCases.ts
+++ b/packages/aml-backoffice-ui/src/hooks/useCases.ts
@@ -1,14 +1,18 @@
 import { useState } from "preact/hooks";
 
 // FIX default import https://github.com/microsoft/TypeScript/issues/49189
-import { AmountString, HttpStatusCode, OfficerAccount, OperationFail, TalerExchangeApi, TalerExchangeResultByMethod, TalerHttpError } from "@gnu-taler/taler-util";
+import { OfficerAccount, OfficerId, OperationOk, TalerExchangeResultByMethod, TalerHttpError, decodeCrock, encodeCrock } from "@gnu-taler/taler-util";
 import _useSWR, { SWRHook } from "swr";
 import { useExchangeApiContext } from "../context/config.js";
-import { useOfficer } from "./useOfficer.js";
 import { AmlExchangeBackend } from "../utils/types.js";
+import { useOfficer } from "./useOfficer.js";
 const useSWR = _useSWR as unknown as SWRHook;
 
-const PAGE_SIZE = 10;
+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;
+
 /**
  * FIXME: mutate result when balance change (transaction )
  * @param account
@@ -24,69 +28,56 @@ export function useCases(state: AmlExchangeBackend.AmlState) {
 
   async function fetcher([officer, state, offset]: [OfficerAccount, AmlExchangeBackend.AmlState, string | undefined]) {
     return await api.getDecisionsByState(officer, state, {
-      order: "asc", offset, limit: PAGE_SIZE + 1
+      order: "asc", offset, limit: PAGINATED_LIST_REQUEST
     })
   }
 
   const { data, error } = useSWR<TalerExchangeResultByMethod<"getDecisionsByState">, TalerHttpError>(
-    !session ? undefined : [session, state, offset],
+    !session ? undefined : [session, state, offset, "getDecisionsByState"],
     fetcher,
   );
 
-  // const [lastAfter, setLastAfter] = useState<
-  //   HttpResponse<AmlExchangeBackend.AmlRecords, AmlExchangeBackend.AmlError>
-  // >({ loading: true });
+  if (error) return error;
+  if (data === undefined) return undefined;
+  if (data.type !== "ok") return data;
 
-  // useEffect(() => {
-  //   if (afterData) setLastAfter(afterData);
-  // }, [afterData]);
+  return buildPaginatedResult(data.body.records, offset, setOffset, (d) => String(d.rowid));
+}
 
-  // if (afterError) {
-  //   return afterError.cause;
-  // }
+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[]> {
 
-  // if the query returns less that we ask, then we have reach the end or beginning
-  const isLastPage =
-    data && data.type === "ok" && data.body.records.length <= PAGE_SIZE;
-  const isFirstPage = !offset;
+  const isLastPage = data.length < PAGINATED_LIST_REQUEST;
+  const isFirstPage = offset === undefined;
 
-  const pagination = {
+  const result = structuredClone(data);
+  if (result.length == PAGINATED_LIST_REQUEST) {
+    result.pop();
+  }
+  return {
+    type: "ok",
+    body: result,
     isLastPage,
     isFirstPage,
-    loadMore: () => {
-      if (isLastPage || data?.type !== "ok") return;
-      const list = data.body.records
-      setOffset(String(list[list.length - 1].rowid));
+    loadNext: () => {
+      if (!result.length) return;
+      const id = getId(result[result.length - 1])
+      setOffset(id);
     },
-    reset: () => {
-      setOffset(undefined)
+    loadFirst: () => {
+      setOffset(undefined);
     },
   };
-
-  // const public_accountslist = data?.type !== "ok" ? [] : data.body.public_accounts;
-  if (!session) {
-    return {
-      data: {
-        type: "fail",
-        case: HttpStatusCode.Unauthorized,
-        detail: {}
-      } as OperationFail<never>
-    }
-  }
-
-  if (data) {
-    if (data.type === "fail") {
-      return { data }
-    }
-    const records = isLastPage ? data.body.records : removeLastElement(data.body.records)
-    return { data: { type: "ok" as const, body: { records } }, pagination }
-  }
-  if (error) {
-    return error;
-  }
-  return undefined;
 }
 
+
 function removeLastElement<T>(list: Array<T>): Array<T> {
   if (list.length === 0) {
     return list;