Fixes error message that appears when deleting open PDS

packages/zowe-explorer/CHANGELOG.md

@@ -14,6 +14,7 @@ All notable changes to the "vscode-extension-for-zowe" extension will be documen
 
 ### Bug fixes
 
+- Fixed an issue where deleting an open PDS resulted in an error. [#3908](https://github.com/zowe/zowe-explorer-vscode/pull/3908)
 - Fixed an issue where `ssh` type profiles were throwing errors when making file system calls. [#3891](https://github.com/zowe/zowe-explorer-vscode/pull/3891)
 - Fixed duplicate credential prompts that occurred when logging out of SSO with multiple virtual workspaces open. [#3858](https://github.com/zowe/zowe-explorer-vscode/issues/3858)
 - Fixed race conditions in parallel file system calls made with invalid credentials. [#3830](https://github.com/zowe/zowe-explorer-vscode/pull/3830)

packages/zowe-explorer/src/trees/dataset/DatasetActions.ts

@@ -25,6 +25,7 @@ import {
     type AttributeInfo,
     DataSetAttributesProvider,
     ZosEncoding,
+    Paginator,
 } from "@zowe/zowe-explorer-api";
 import { ZoweDatasetNode } from "./ZoweDatasetNode";
 import { DatasetUtils } from "./DatasetUtils";
@@ -44,6 +45,7 @@ import { Definitions } from "../../configuration/Definitions";
 import { TreeViewUtils } from "../../utils/TreeViewUtils";
 import { SharedTreeProviders } from "../shared/SharedTreeProviders";
 import { DatasetTree } from "./DatasetTree";
+import { SettingsConfig } from "../../configuration/SettingsConfig";
 
 export class DatasetActions {
     public static typeEnum: zosfiles.CreateDataSetTypeEnum;
@@ -1526,6 +1528,20 @@ export class DatasetActions {
             await datasetProvider.checkCurrentProfile(node);
             if (Profiles.getInstance().validProfile !== Validation.ValidationType.INVALID) {
                 await vscode.workspace.fs.delete(node.resourceUri, { recursive: false });
+                if (node?.children) {
+                    node.children = node.children.filter((child) => child !== node);
+                }
+
+                const dataSetNode = node.getSessionNode() as ZoweDatasetNode;
+                const isSession = SharedContext.isSession(dataSetNode) || SharedContext.isFavoriteSearch(dataSetNode);
+                const fetchFunction = isSession
+                    ? dataSetNode.listDatasetsInRange.bind(dataSetNode)
+                    : dataSetNode.listMembersInRange.bind(dataSetNode);
+
+                const itemsPerPage = SettingsConfig.getDirectValue<number>(Constants.SETTINGS_DATASETS_PER_PAGE) ?? Constants.DEFAULT_ITEMS_PER_PAGE;
+
+                dataSetNode.paginator = new Paginator(itemsPerPage, fetchFunction);
+                dataSetNode.paginatorData = undefined;
             } else {
                 return;
             }
@@ -1551,7 +1567,6 @@ export class DatasetActions {
             throw err;
         }
 
-        // remove node from tree
         if (fav) {
             datasetProvider.mSessionNodes.forEach((ses) => {
                 if (node.getProfileName() === ses.label.toString()) {
@@ -1574,7 +1589,6 @@ export class DatasetActions {
             // Refresh the correct node (parent of node to delete) to reflect changes
             datasetProvider.refreshElement(isMember ? parentNode : parentNode.getParent());
         }
-
         datasetProvider.refreshElement(node.getSessionNode());
     }
 

packages/zowe-explorer/src/trees/dataset/ZoweDatasetNode.ts

@@ -72,8 +72,8 @@ export class ZoweDatasetNode extends ZoweTreeNode implements IZoweDatasetTreeNod
     public persistence = new ZowePersistentFilters(PersistenceSchemaEnum.Dataset);
     public inFilterPrompt = false;
 
-    private paginator?: Paginator<IZosFilesResponse>;
-    private paginatorData?: {
+    public paginator?: Paginator<IZosFilesResponse>;
+    public paginatorData?: {
         totalItems?: number;
         lastItemName?: string;
     };
@@ -681,7 +681,7 @@ export class ZoweDatasetNode extends ZoweTreeNode implements IZoweDatasetTreeNod
         return fileEntry?.etag;
     }
 
-    private async listDatasetsInRange(start?: string, limit?: number): Promise<IFetchResult<IZosFilesResponse, string>> {
+    public async listDatasetsInRange(start?: string, limit?: number): Promise<IFetchResult<IZosFilesResponse, string>> {
         let totalItems = this.paginatorData?.totalItems;
         let lastDatasetName = this.paginatorData?.lastItemName;
         const responses: IZosFilesResponse[] = [];
@@ -803,7 +803,7 @@ export class ZoweDatasetNode extends ZoweTreeNode implements IZoweDatasetTreeNod
         }
     }
 
-    private async listMembersInRange(start?: string, limit?: number): Promise<IFetchResult<IZosFilesResponse, string>> {
+    public async listMembersInRange(start?: string, limit?: number): Promise<IFetchResult<IZosFilesResponse, string>> {
         let totalItems = this.paginatorData?.totalItems;
         let lastMemberName = this.paginatorData?.lastItemName;
         let allMembers: IZosmfListResponse[] = [];
@@ -954,7 +954,6 @@ export class ZoweDatasetNode extends ZoweTreeNode implements IZoweDatasetTreeNod
             // Lazy initialization or re-initialization of paginator if needed
             const fetchFunction = isSession ? this.listDatasetsInRange.bind(this) : this.listMembersInRange.bind(this);
             this.itemsPerPage = SettingsConfig.getDirectValue<number>(Constants.SETTINGS_DATASETS_PER_PAGE) ?? Constants.DEFAULT_ITEMS_PER_PAGE;
-
             if (isSession && patternChanged) {
                 // Check if pattern changed for session
                 this.paginator = this.paginatorData = undefined;