Show error when searching public rooms fails

src/components/views/dialogs/spotlight/SpotlightDialog.tsx

@@ -311,6 +311,7 @@ const SpotlightDialog: React.FC<IProps> = ({ initialText = "", initialFilter = n
         config,
         setConfig,
         search: searchPublicRooms,
+        error: publicRoomsError,
     } = usePublicRoomDirectory();
     const [showRooms, setShowRooms] = useState(true);
     const [showSpaces, setShowSpaces] = useState(false);
@@ -757,6 +758,23 @@ const SpotlightDialog: React.FC<IProps> = ({ initialText = "", initialFilter = n
 
         let publicRoomsSection: JSX.Element | undefined;
         if (filter === Filter.PublicRooms) {
+            let content: JSX.Element | JSX.Element[];
+            if (!showRooms && !showSpaces) {
+                content = (
+                    <div className="mx_SpotlightDialog_otherSearches_messageSearchText">
+                        {_t("You cannot search for rooms that are neither a room nor a space")}
+                    </div>
+                );
+            } else if (publicRoomsError) {
+                content = (
+                    <div className="mx_SpotlightDialog_otherSearches_messageSearchText">
+                        {_t("Failed to query public rooms")}
+                    </div>
+                );
+            } else {
+                content = results[Section.PublicRooms].slice(0, SECTION_LIMIT).map(resultMapper);
+            }
+
             publicRoomsSection = (
                 <div
                     className="mx_SpotlightDialog_section mx_SpotlightDialog_results"
@@ -783,16 +801,7 @@ const SpotlightDialog: React.FC<IProps> = ({ initialText = "", initialFilter = n
                             <NetworkDropdown protocols={protocols} config={config ?? null} setConfig={setConfig} />
                         </div>
                     </div>
-                    <div>
-                        {" "}
-                        {showRooms || showSpaces ? (
-                            results[Section.PublicRooms].slice(0, SECTION_LIMIT).map(resultMapper)
-                        ) : (
-                            <div className="mx_SpotlightDialog_otherSearches_messageSearchText">
-                                {_t("You cannot search for rooms that are neither a room nor a space")}
-                            </div>
-                        )}{" "}
-                    </div>
+                    <div>{content}</div>
                 </div>
             );
         }

src/hooks/usePublicRoomDirectory.ts

@@ -51,6 +51,7 @@ export const usePublicRoomDirectory = (): {
     config?: IPublicRoomDirectoryConfig | null;
     setConfig(config: IPublicRoomDirectoryConfig | null): void;
     search(opts: IPublicRoomsOpts): Promise<boolean>;
+    error?: Error | true; // true if an unknown error is encountered
 } => {
     const [publicRooms, setPublicRooms] = useState<IPublicRoomsChunkRoom[]>([]);
 
@@ -60,6 +61,7 @@ export const usePublicRoomDirectory = (): {
 
     const [ready, setReady] = useState(false);
     const [loading, setLoading] = useState(false);
+    const [error, setError] = useState<Error | true | undefined>();
 
     const [updateQuery, updateResult] = useLatestResult<IRoomDirectoryOptions, IPublicRoomsChunkRoom[]>(setPublicRooms);
 
@@ -112,12 +114,14 @@ export const usePublicRoomDirectory = (): {
             }
 
             updateQuery(opts);
+            setLoading(true);
+            setError(undefined);
             try {
-                setLoading(true);
                 const { chunk } = await MatrixClientPeg.safeGet().publicRooms(opts);
                 updateResult(opts, showNsfwPublicRooms ? chunk : chunk.filter(cheapNsfwFilter));
                 return true;
             } catch (e) {
+                setError(e instanceof Error ? e : true);
                 console.error("Could not fetch public rooms for params", opts, e);
                 updateResult(opts, []);
                 return false;
@@ -183,5 +187,6 @@ export const usePublicRoomDirectory = (): {
         config,
         search,
         setConfig,
+        error,
     } as const;
 };

src/i18n/strings/en_EN.json

@@ -3138,9 +3138,10 @@
     "Search for": "Search for",
     "View": "View",
     "Spaces you're in": "Spaces you're in",
+    "You cannot search for rooms that are neither a room nor a space": "You cannot search for rooms that are neither a room nor a space",
+    "Failed to query public rooms": "Failed to query public rooms",
     "Show rooms": "Show rooms",
     "Show spaces": "Show spaces",
-    "You cannot search for rooms that are neither a room nor a space": "You cannot search for rooms that are neither a room nor a space",
     "Other rooms in %(spaceName)s": "Other rooms in %(spaceName)s",
     "Join %(roomAddress)s": "Join %(roomAddress)s",
     "Some results may be hidden for privacy": "Some results may be hidden for privacy",

test/components/views/dialogs/SpotlightDialog-test.tsx

@@ -16,7 +16,14 @@ limitations under the License.
 
 import React from "react";
 import { mocked } from "jest-mock";
-import { IProtocol, IPublicRoomsChunkRoom, MatrixClient, Room, RoomMember } from "matrix-js-sdk/src/matrix";
+import {
+    ConnectionError,
+    IProtocol,
+    IPublicRoomsChunkRoom,
+    MatrixClient,
+    Room,
+    RoomMember,
+} from "matrix-js-sdk/src/matrix";
 import sanitizeHtml from "sanitize-html";
 import { fireEvent, render, screen } from "@testing-library/react";
 
@@ -495,4 +502,32 @@ describe("Spotlight Dialog", () => {
             expect(screen.getByText(potatoRoom.name!)).toBeInTheDocument();
         });
     });
+
+    it("should show error if /publicRooms API failed", async () => {
+        mocked(mockedClient.publicRooms).mockRejectedValue(new ConnectionError("Failed to fetch"));
+        render(<SpotlightDialog initialFilter={Filter.PublicRooms} onFinished={() => null} />);
+
+        jest.advanceTimersByTime(200);
+        await flushPromisesWithFakeTimers();
+
+        expect(screen.getByText("Failed to query public rooms")).toBeInTheDocument();
+    });
+
+    it("should show error both 'Show rooms' and 'Show spaces' are unchecked", async () => {
+        jest.spyOn(SettingsStore, "getValue").mockImplementation((settingName, roomId, excludeDefault) => {
+            if (settingName === "feature_exploring_public_spaces") {
+                return true;
+            } else {
+                return []; // SpotlightSearch.recentSearches
+            }
+        });
+        render(<SpotlightDialog initialFilter={Filter.PublicRooms} onFinished={() => null} />);
+
+        jest.advanceTimersByTime(200);
+        await flushPromisesWithFakeTimers();
+
+        fireEvent.click(screen.getByText("Show rooms"));
+
+        expect(screen.getByText("You cannot search for rooms that are neither a room nor a space")).toBeInTheDocument();
+    });
 });