[PM-17690] Improve collection search to consider nested collections (#14420)

* Add getFlatCollectionTree function and corresponding tests

- Implemented getFlatCollectionTree to flatten a tree structure of collections.
- Added unit tests for getFlatCollectionTree to verify functionality.

* Refactor VaultComponent to utilize getFlatCollectionTree to search within all sub-levels

- Updated vault.component.ts to import and use getFlatCollectionTree for flattening collection nodes during search.
- Ensured consistent handling of collections across both vault and admin-console components.

apps/web/src/app/admin-console/organizations/collections/utils/collection-utils.spec.ts

@@ -1,6 +1,7 @@
 import { CollectionView } from "@bitwarden/admin-console/common";
+import { TreeNode } from "@bitwarden/common/vault/models/domain/tree-node";
 
-import { getNestedCollectionTree } from "./collection-utils";
+import { getNestedCollectionTree, getFlatCollectionTree } from "./collection-utils";
 
 describe("CollectionUtils Service", () => {
   describe("getNestedCollectionTree", () => {
@@ -36,4 +37,63 @@ describe("CollectionUtils Service", () => {
       expect(result).toEqual([]);
     });
   });
+
+  describe("getFlatCollectionTree", () => {
+    it("should flatten a tree node with no children", () => {
+      // Arrange
+      const collection = new CollectionView();
+      collection.name = "Test Collection";
+      collection.id = "test-id";
+
+      const treeNodes: TreeNode<CollectionView>[] = [
+        new TreeNode<CollectionView>(collection, null),
+      ];
+
+      // Act
+      const result = getFlatCollectionTree(treeNodes);
+
+      // Assert
+      expect(result.length).toBe(1);
+      expect(result[0]).toBe(collection);
+    });
+
+    it("should flatten a tree node with children", () => {
+      // Arrange
+      const parentCollection = new CollectionView();
+      parentCollection.name = "Parent";
+      parentCollection.id = "parent-id";
+
+      const child1Collection = new CollectionView();
+      child1Collection.name = "Child 1";
+      child1Collection.id = "child1-id";
+
+      const child2Collection = new CollectionView();
+      child2Collection.name = "Child 2";
+      child2Collection.id = "child2-id";
+
+      const grandchildCollection = new CollectionView();
+      grandchildCollection.name = "Grandchild";
+      grandchildCollection.id = "grandchild-id";
+
+      const parentNode = new TreeNode<CollectionView>(parentCollection, null);
+      const child1Node = new TreeNode<CollectionView>(child1Collection, parentNode);
+      const child2Node = new TreeNode<CollectionView>(child2Collection, parentNode);
+      const grandchildNode = new TreeNode<CollectionView>(grandchildCollection, child1Node);
+
+      parentNode.children = [child1Node, child2Node];
+      child1Node.children = [grandchildNode];
+
+      const treeNodes: TreeNode<CollectionView>[] = [parentNode];
+
+      // Act
+      const result = getFlatCollectionTree(treeNodes);
+
+      // Assert
+      expect(result.length).toBe(4);
+      expect(result[0]).toBe(parentCollection);
+      expect(result).toContain(child1Collection);
+      expect(result).toContain(child2Collection);
+      expect(result).toContain(grandchildCollection);
+    });
+  });
 });

apps/web/src/app/admin-console/organizations/collections/utils/collection-utils.ts

@@ -37,6 +37,27 @@ export function getNestedCollectionTree(
   return nodes;
 }
 
+export function getFlatCollectionTree(
+  nodes: TreeNode<CollectionAdminView>[],
+): CollectionAdminView[];
+export function getFlatCollectionTree(nodes: TreeNode<CollectionView>[]): CollectionView[];
+export function getFlatCollectionTree(
+  nodes: TreeNode<CollectionView | CollectionAdminView>[],
+): (CollectionView | CollectionAdminView)[] {
+  if (!nodes || nodes.length === 0) {
+    return [];
+  }
+
+  return nodes.flatMap((node) => {
+    if (!node.children || node.children.length === 0) {
+      return [node.node];
+    }
+
+    const children = getFlatCollectionTree(node.children);
+    return [node.node, ...children];
+  });
+}
+
 function cloneCollection(collection: CollectionView): CollectionView;
 function cloneCollection(collection: CollectionAdminView): CollectionAdminView;
 function cloneCollection(

apps/web/src/app/admin-console/organizations/collections/vault.component.ts

@@ -121,7 +121,7 @@ import {
   BulkCollectionsDialogResult,
 } from "./bulk-collections-dialog";
 import { CollectionAccessRestrictedComponent } from "./collection-access-restricted.component";
-import { getNestedCollectionTree } from "./utils";
+import { getNestedCollectionTree, getFlatCollectionTree } from "./utils";
 import { VaultFilterModule } from "./vault-filter/vault-filter.module";
 import { VaultHeaderComponent } from "./vault-header/vault-header.component";
 
@@ -432,23 +432,33 @@ export class VaultComponent implements OnInit, OnDestroy {
         }
 
         this.showAddAccessToggle = false;
-        let collectionsToReturn = [];
+        let searchableCollectionNodes: TreeNode<CollectionAdminView>[] = [];
         if (filter.collectionId === undefined || filter.collectionId === All) {
-          collectionsToReturn = collections.map((c) => c.node);
+          searchableCollectionNodes = collections;
         } else {
           const selectedCollection = ServiceUtils.getTreeNodeObjectFromList(
             collections,
             filter.collectionId,
           );
-          collectionsToReturn = selectedCollection?.children.map((c) => c.node) ?? [];
+          searchableCollectionNodes = selectedCollection?.children ?? [];
         }
 
+        let collectionsToReturn: CollectionAdminView[] = [];
+
         if (await this.searchService.isSearchable(this.userId, searchText)) {
+          // Flatten the tree for searching through all levels
+          const flatCollectionTree: CollectionAdminView[] =
+            getFlatCollectionTree(searchableCollectionNodes);
+
           collectionsToReturn = this.searchPipe.transform(
-            collectionsToReturn,
+            flatCollectionTree,
             searchText,
-            (collection: CollectionAdminView) => collection.name,
-            (collection: CollectionAdminView) => collection.id,
+            (collection) => collection.name,
+            (collection) => collection.id,
+          );
+        } else {
+          collectionsToReturn = searchableCollectionNodes.map(
+            (treeNode: TreeNode<CollectionAdminView>): CollectionAdminView => treeNode.node,
           );
         }
 

apps/web/src/app/vault/individual-vault/vault.component.ts

@@ -79,7 +79,10 @@ import {
   PasswordRepromptService,
 } from "@bitwarden/vault";
 
-import { getNestedCollectionTree } from "../../admin-console/organizations/collections";
+import {
+  getNestedCollectionTree,
+  getFlatCollectionTree,
+} from "../../admin-console/organizations/collections";
 import {
   CollectionDialogAction,
   CollectionDialogTabType,
@@ -372,31 +375,35 @@ export class VaultComponent implements OnInit, OnDestroy {
         if (filter.collectionId === undefined || filter.collectionId === Unassigned) {
           return [];
         }
-        let collectionsToReturn = [];
+        let searchableCollectionNodes: TreeNode<CollectionView>[] = [];
         if (filter.organizationId !== undefined && filter.collectionId === All) {
-          collectionsToReturn = collections
-            .filter((c) => c.node.organizationId === filter.organizationId)
-            .map((c) => c.node);
+          searchableCollectionNodes = collections.filter(
+            (c) => c.node.organizationId === filter.organizationId,
+          );
         } else if (filter.collectionId === All) {
-          collectionsToReturn = collections.map((c) => c.node);
+          searchableCollectionNodes = collections;
         } else {
           const selectedCollection = ServiceUtils.getTreeNodeObjectFromList(
             collections,
             filter.collectionId,
           );
-          collectionsToReturn = selectedCollection?.children.map((c) => c.node) ?? [];
+          searchableCollectionNodes = selectedCollection?.children ?? [];
         }
 
         if (await this.searchService.isSearchable(activeUserId, searchText)) {
-          collectionsToReturn = this.searchPipe.transform(
-            collectionsToReturn,
+          // Flatten the tree for searching through all levels
+          const flatCollectionTree: CollectionView[] =
+            getFlatCollectionTree(searchableCollectionNodes);
+
+          return this.searchPipe.transform(
+            flatCollectionTree,
             searchText,
             (collection) => collection.name,
             (collection) => collection.id,
           );
         }
 
-        return collectionsToReturn;
+        return searchableCollectionNodes.map((treeNode: TreeNode<CollectionView>) => treeNode.node);
       }),
       shareReplay({ refCount: true, bufferSize: 1 }),
     );