From 4041a76a58503572c6fe8edc87658afc946a11e0 Mon Sep 17 00:00:00 2001
From: Sebastian <sebasjm@gmail.com>
Date: Mon, 25 Sep 2023 11:58:17 -0300
Subject: more ui: pagination

---
 packages/demobank-ui/src/hooks/access.ts  | 23 ++++++++++++++---------
 packages/demobank-ui/src/hooks/backend.ts | 18 +++++++++++-------
 2 files changed, 25 insertions(+), 16 deletions(-)

(limited to 'packages/demobank-ui/src/hooks')

diff --git a/packages/demobank-ui/src/hooks/access.ts b/packages/demobank-ui/src/hooks/access.ts
index 2f6848af8..20fd64bfa 100644
--- a/packages/demobank-ui/src/hooks/access.ts
+++ b/packages/demobank-ui/src/hooks/access.ts
@@ -255,7 +255,7 @@ export function useTransactionDetails(
 }
 
 interface PaginationFilter {
-  page: number;
+  // page: number;
 }
 
 export function usePublicAccounts(
@@ -275,7 +275,7 @@ export function usePublicAccounts(
   } = useSWR<
     HttpResponseOk<SandboxBackend.CoreBank.PublicAccountsResponse>,
     RequestError<SandboxBackend.SandboxError>
-  >([`public-accounts`, args?.page, PAGE_SIZE], paginatedFetcher);
+  >([`public-accounts`, page, PAGE_SIZE], paginatedFetcher);
 
   const [lastAfter, setLastAfter] = useState<
     HttpResponse<
@@ -334,7 +334,7 @@ export function useTransactions(
 > {
   const { paginatedFetcher } = useAuthenticatedBackend();
 
-  const [page, setPage] = useState(1);
+  const [start, setStart] = useState<string>();
 
   const {
     data: afterData,
@@ -344,7 +344,7 @@ export function useTransactions(
     HttpResponseOk<SandboxBackend.CoreBank.BankAccountTransactionsResponse>,
     RequestError<SandboxBackend.SandboxError>
   >(
-    [`accounts/${account}/transactions`, args?.page, PAGE_SIZE],
+    [`accounts/${account}/transactions`, start, PAGE_SIZE],
     paginatedFetcher, {
     refreshInterval: 0,
     refreshWhenHidden: false,
@@ -374,19 +374,24 @@ export function useTransactions(
   // if the query returns less that we ask, then we have reach the end or beginning
   const isReachingEnd =
     afterData && afterData.data.transactions.length < PAGE_SIZE;
-  const isReachingStart = false;
+  const isReachingStart = start == undefined;
 
   const pagination = {
     isReachingEnd,
     isReachingStart,
     loadMore: () => {
       if (!afterData || isReachingEnd) return;
-      if (afterData.data.transactions.length < MAX_RESULT_SIZE) {
-        setPage(page + 1);
-      }
+      // if (afterData.data.transactions.length < MAX_RESULT_SIZE) {
+      // console.log("load more", page)
+      const l = afterData.data.transactions[afterData.data.transactions.length-1]
+      setStart(String(l.row_id));
+      // }
     },
     loadMorePrev: () => {
-      null;
+      if (!afterData || isReachingStart) return;
+      // if (afterData.data.transactions.length < MAX_RESULT_SIZE) {
+      setStart(undefined)
+      // }
     },
   };
 
diff --git a/packages/demobank-ui/src/hooks/backend.ts b/packages/demobank-ui/src/hooks/backend.ts
index e6a3a1c0c..3d5bfa360 100644
--- a/packages/demobank-ui/src/hooks/backend.ts
+++ b/packages/demobank-ui/src/hooks/backend.ts
@@ -159,7 +159,7 @@ interface useBackendType {
   fetcher: <T>(endpoint: string) => Promise<HttpResponseOk<T>>;
   multiFetcher: <T>(endpoint: string[][]) => Promise<HttpResponseOk<T>[]>;
   paginatedFetcher: <T>(
-    args: [string, number, number],
+    args: [string, string | undefined, number],
   ) => Promise<HttpResponseOk<T>>;
   sandboxAccountsFetcher: <T>(
     args: [string, number, number, string],
@@ -188,13 +188,15 @@ export function usePublicBackend(): useBackendType {
     [baseUrl],
   );
   const paginatedFetcher = useCallback(
-    function fetcherImpl<T>([endpoint, page, size]: [
+    function fetcherImpl<T>([endpoint, start, size]: [
       string,
-      number,
+      string | undefined,
       number,
     ]): Promise<HttpResponseOk<T>> {
+      const delta = -1 * size //descending order
+      const params = start ? { delta, start } : {delta}
       return requestHandler<T>(baseUrl, endpoint, {
-        params: { page: page || 1, size },
+        params,
       });
     },
     [baseUrl],
@@ -280,14 +282,16 @@ export function useAuthenticatedBackend(): useBackendType {
     [baseUrl, creds],
   );
   const paginatedFetcher = useCallback(
-    function fetcherImpl<T>([endpoint, page = 1, size]: [
+    function fetcherImpl<T>([endpoint, start, size]: [
       string,
-      number,
+      string | undefined,
       number,
     ]): Promise<HttpResponseOk<T>> {
+      const delta = -1 * size //descending order
+      const params = start ? { delta, start } : {delta}
       return requestHandler<T>(baseUrl, endpoint, {
         token: creds,
-        params: { delta: size, start: size * page },
+        params,
       });
     },
     [baseUrl, creds],
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