fix: authorized search engine to obey query page limit

Signed-off-by: Heikki Hellgren <heikki.hellgren@op.fi>

.changeset/light-birds-sparkle.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-search-backend': patch
+---
+
+Authorized search engine now obeys query page limit

plugins/search-backend/src/service/AuthorizedSearchEngine.ts

@@ -18,12 +18,12 @@ import { compact, zipObject } from 'lodash';
 import qs from 'qs';
 import DataLoader from 'dataloader';
 import {
-  EvaluatePermissionResponse,
-  EvaluatePermissionRequest,
+  AuthorizePermissionRequest,
   AuthorizeResult,
+  EvaluatePermissionRequest,
+  EvaluatePermissionResponse,
   isResourcePermission,
   PermissionEvaluator,
-  AuthorizePermissionRequest,
   QueryPermissionRequest,
 } from '@backstage/plugin-permission-common';
 import {
@@ -63,7 +63,6 @@ export function encodePageCursor({ page }: { page: number }): string {
 }
 
 export class AuthorizedSearchEngine implements SearchEngine {
-  private readonly pageSize = 25;
   private readonly queryLatencyBudgetMs: number;
 
   constructor(
@@ -162,8 +161,9 @@ export class AuthorizedSearchEngine implements SearchEngine {
       );
     }
 
+    const pageSize = query.pageLimit || 25;
     const { page } = decodePageCursor(query.pageCursor);
-    const targetResults = (page + 1) * this.pageSize;
+    const targetResults = (page + 1) * pageSize;
 
     let filteredResults: IndexableResult[] = [];
     let nextPageCursor: string | undefined;
@@ -190,12 +190,12 @@ export class AuthorizedSearchEngine implements SearchEngine {
 
     return {
       results: filteredResults
-        .slice(page * this.pageSize, (page + 1) * this.pageSize)
+        .slice(page * pageSize, (page + 1) * pageSize)
         .map((result, index) => {
           // Overwrite any/all rank entries to avoid leaking knowledge of filtered results.
           return {
             ...result,
-            rank: page * this.pageSize + index + 1,
+            rank: page * pageSize + index + 1,
           };
         }),
       previousPageCursor: