From bdebd36e7676530dae4832735f56c5250885ee9c Mon Sep 17 00:00:00 2001
From: Tyrone Tse <ttse@adobe.com>
Date: Thu, 6 Jun 2024 10:05:55 -0500
Subject: [PATCH] Restored previous logic using cursorArray to manage the
 calculation of the cursor for the previous page.

---
 blocks/gmo-program-list/gmo-program-list.js | 23 ++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/blocks/gmo-program-list/gmo-program-list.js b/blocks/gmo-program-list/gmo-program-list.js
index 8a3c6f18..4899cfe8 100644
--- a/blocks/gmo-program-list/gmo-program-list.js
+++ b/blocks/gmo-program-list/gmo-program-list.js
@@ -36,6 +36,7 @@ const headerConfig = [
 const DEFAULT_ITEMS_PER_PAGE = 8;
 //Global variables used by helper functions
 let currentPageInfo = {};
+let cursorArray = [];
 let currentPage = 1;
 let currentNumberPerPage = DEFAULT_ITEMS_PER_PAGE;
 let currentGraphqlFilter = {};
@@ -61,6 +62,7 @@ document.addEventListener('gmoCampaignListBlock', async function() {
     //Trigger loading the gmo-campaign-block
     //Reset page variables
     currentPageInfo = {};
+    cursorArray = [];
     currentPage = 1;
     currentNumberPerPage = DEFAULT_ITEMS_PER_PAGE;
 
@@ -73,10 +75,6 @@ export default async function decorate(block, numPerPage = currentNumberPerPage,
     if (blockConfig == undefined) blockConfig = readBlockConfig(block);
     const campaignPaginatedResponse = await graphqlAllCampaignsFilter(numPerPage, cursor,graphQLFilter);
     const campaigns = campaignPaginatedResponse.data.programPaginated.edges;
-
-    //Set previous cursor to currentCursor
-    currentPageInfo.previousCursor =  currentPageInfo.currentCursor;
-
     currentPageInfo = campaignPaginatedResponse.data.programPaginated.pageInfo;
     //Current cursor used in previous page logic
     currentPageInfo.currentCursor = cursor;
@@ -85,6 +83,17 @@ export default async function decorate(block, numPerPage = currentNumberPerPage,
       currentPageInfo.nextCursor = currentPageInfo.endCursor === undefined ? campaigns[campaigns.length - 1].cursor : currentPageInfo.endCursor;
     }
 
+    if (!previousPage && !nextPage)
+    {
+      cursorArray = campaigns.map(item => item.cursor);
+    }
+    else if (nextPage){
+
+      campaigns.forEach(item => {
+          cursorArray.push(item.cursor);
+      });
+    }
+
     currentPageInfo.itemCount = campaigns.length;
 
     // Calculate total number of pages
@@ -436,7 +445,11 @@ function prevPage(prevBtn) {
     if (currentPage > 1) {
         currentPage--;
         const block = document.querySelector('.gmo-program-list.block');
-        decorate(block, currentNumberPerPage, currentPage.previousCursor, true, false, currentGraphqlFilter);
+
+        const currentCursor = currentPageInfo.currentCursor;
+        //Calculate cursor for previous page
+        const indexCursor = cursorArray.indexOf(currentCursor) - currentNumberPerPage;
+        decorate(block, currentNumberPerPage, cursorArray[indexCursor], true, false,currentGraphqlFilter);
         const nextBtn = document.querySelector('.footer-pagination-button.next');
         nextBtn.classList.add('active');
         if (currentPage === 1) {