Allow creating knock rooms

Signed-off-by: Charly Nguyen <charly.nguyen@nordeck.net>

res/css/views/dialogs/_JoinRuleDropdown.pcss

@@ -44,6 +44,10 @@ limitations under the License.
                 mask-position: center;
                 background-color: $secondary-content;
             }
+
+            &.mx_JoinRuleDropdown_knock::before {
+                content: normal;
+            }
         }
     }
 
@@ -63,4 +67,11 @@ limitations under the License.
         mask-image: url("$(res)/img/element-icons/group-members.svg");
         mask-size: contain;
     }
+
+    .mx_JoinRuleDropdown_icon {
+        color: $secondary-content;
+        position: absolute;
+        left: 6px;
+        top: 8px;
+    }
 }

src/components/views/dialogs/CreateRoomDialog.tsx

@@ -34,6 +34,7 @@ import JoinRuleDropdown from "../elements/JoinRuleDropdown";
 import { getKeyBindingsManager } from "../../../KeyBindingsManager";
 import { KeyBindingAction } from "../../../accessibility/KeyboardShortcuts";
 import { privateShouldBeEncrypted } from "../../../utils/rooms";
+import SettingsStore from "../../../settings/SettingsStore";
 
 interface IProps {
     type?: RoomType;
@@ -59,13 +60,15 @@ interface IState {
 }
 
 export default class CreateRoomDialog extends React.Component<IProps, IState> {
+    private readonly askToJoinEnabled: boolean;
     private readonly supportsRestricted: boolean;
     private nameField = createRef<Field>();
     private aliasField = createRef<RoomAliasField>();
 
     public constructor(props: IProps) {
         super(props);
 
+        this.askToJoinEnabled = SettingsStore.getValue("feature_ask_to_join");
         this.supportsRestricted = !!this.props.parentSpace;
 
         let joinRule = JoinRule.Invite;
@@ -126,6 +129,10 @@ export default class CreateRoomDialog extends React.Component<IProps, IState> {
             opts.joinRule = JoinRule.Restricted;
         }
 
+        if (this.state.joinRule === JoinRule.Knock) {
+            opts.joinRule = JoinRule.Knock;
+        }
+
         return opts;
     }
 
@@ -283,6 +290,14 @@ export default class CreateRoomDialog extends React.Component<IProps, IState> {
                     {_t("You can change this at any time from room settings.")}
                 </p>
             );
+        } else if (this.state.joinRule === JoinRule.Knock) {
+            publicPrivateLabel = (
+                <p>
+                    {_t(
+                        "Anyone can request to join, but admins or moderators need to grant access. You can change this later.",
+                    )}
+                </p>
+            );
         }
 
         let e2eeSection: JSX.Element | undefined;
@@ -332,7 +347,7 @@ export default class CreateRoomDialog extends React.Component<IProps, IState> {
         let title: string;
         if (isVideoRoom) {
             title = _t("Create a video room");
-        } else if (this.props.parentSpace) {
+        } else if (this.props.parentSpace || this.state.joinRule === JoinRule.Knock) {
             title = _t("Create a room");
         } else {
             title = this.state.joinRule === JoinRule.Public ? _t("Create a public room") : _t("Create a private room");
@@ -365,6 +380,7 @@ export default class CreateRoomDialog extends React.Component<IProps, IState> {
                         <JoinRuleDropdown
                             label={_t("Room visibility")}
                             labelInvite={_t("Private room (invite only)")}
+                            labelKnock={this.askToJoinEnabled ? _t("Ask to join") : undefined}
                             labelPublic={_t("Public room")}
                             labelRestricted={this.supportsRestricted ? _t("Visible to space members") : undefined}
                             value={this.state.joinRule}

src/components/views/elements/JoinRuleDropdown.tsx

@@ -19,12 +19,14 @@ import { JoinRule } from "matrix-js-sdk/src/@types/partials";
 
 import Dropdown from "./Dropdown";
 import { NonEmptyArray } from "../../../@types/common";
+import { Icon as AskToJoinIcon } from "../../../../res/img/element-icons/ask-to-join.svg";
 
 interface IProps {
     value: JoinRule;
     label: string;
     width?: number;
     labelInvite: string;
+    labelKnock?: string;
     labelPublic: string;
     labelRestricted?: string; // if omitted then this option will be hidden, e.g if unsupported
     onChange(value: JoinRule): void;
@@ -33,6 +35,7 @@ interface IProps {
 const JoinRuleDropdown: React.FC<IProps> = ({
     label,
     labelInvite,
+    labelKnock,
     labelPublic,
     labelRestricted,
     value,
@@ -48,6 +51,17 @@ const JoinRuleDropdown: React.FC<IProps> = ({
         </div>,
     ] as NonEmptyArray<ReactElement & { key: string }>;
 
+    if (labelKnock) {
+        options.unshift(
+            (
+                <div key={JoinRule.Knock} className="mx_JoinRuleDropdown_knock">
+                    <AskToJoinIcon className="mx_Icon mx_Icon_16 mx_JoinRuleDropdown_icon" />
+                    {labelKnock}
+                </div>
+            ) as ReactElement & { key: string },
+        );
+    }
+
     if (labelRestricted) {
         options.unshift(
             (

src/createRoom.ts

@@ -222,6 +222,10 @@ export default async function createRoom(client: MatrixClient, opts: IOpts): Pro
         });
     }
 
+    if (opts.joinRule === JoinRule.Knock) {
+        createOpts.room_version = PreferredRoomVersions.KnockRooms;
+    }
+
     if (opts.parentSpace) {
         createOpts.initial_state.push(makeSpaceParentEvent(opts.parentSpace, true));
         if (!opts.historyVisibility) {

src/i18n/strings/en_EN.json

@@ -1003,6 +1003,7 @@
     "Insert a trailing colon after user mentions at the start of a message": "Insert a trailing colon after user mentions at the start of a message",
     "Hide notification dot (only display counters badges)": "Hide notification dot (only display counters badges)",
     "Enable intentional mentions": "Enable intentional mentions",
+    "Enable ask to join": "Enable ask to join",
     "Use a more compact 'Modern' layout": "Use a more compact 'Modern' layout",
     "Show a placeholder for removed messages": "Show a placeholder for removed messages",
     "Show join/leave messages (invites/removes/bans unaffected)": "Show join/leave messages (invites/removes/bans unaffected)",
@@ -2786,6 +2787,7 @@
     "Anyone will be able to find and join this room, not just members of <SpaceName/>.": "Anyone will be able to find and join this room, not just members of <SpaceName/>.",
     "Anyone will be able to find and join this room.": "Anyone will be able to find and join this room.",
     "Only people invited will be able to find and join this room.": "Only people invited will be able to find and join this room.",
+    "Anyone can request to join, but admins or moderators need to grant access. You can change this later.": "Anyone can request to join, but admins or moderators need to grant access. You can change this later.",
     "You can't disable this later. The room will be encrypted but the embedded call will not.": "You can't disable this later. The room will be encrypted but the embedded call will not.",
     "You can't disable this later. Bridges & most bots won't work yet.": "You can't disable this later. Bridges & most bots won't work yet.",
     "Your server requires encryption to be enabled in private rooms.": "Your server requires encryption to be enabled in private rooms.",
@@ -2799,6 +2801,7 @@
     "Topic (optional)": "Topic (optional)",
     "Room visibility": "Room visibility",
     "Private room (invite only)": "Private room (invite only)",
+    "Ask to join": "Ask to join",
     "Visible to space members": "Visible to space members",
     "Block anyone not part of %(serverName)s from ever joining this room.": "Block anyone not part of %(serverName)s from ever joining this room.",
     "Create video room": "Create video room",

src/settings/Settings.tsx

@@ -556,6 +556,13 @@ export const SETTINGS: { [setting: string]: ISetting } = {
             ["org.matrix.msc3952_intentional_mentions"],
         ]),
     },
+    "feature_ask_to_join": {
+        default: false,
+        displayName: _td("Enable ask to join"),
+        isFeature: true,
+        labsGroup: LabGroup.Rooms,
+        supportedLevels: LEVELS_FEATURE,
+    },
     "useCompactLayout": {
         supportedLevels: LEVELS_DEVICE_ONLY_SETTINGS,
         displayName: _td("Use a more compact 'Modern' layout"),

src/utils/PreferredRoomVersions.ts

@@ -23,6 +23,11 @@ limitations under the License.
  * Loosely follows https://spec.matrix.org/latest/rooms/#feature-matrix
  */
 export class PreferredRoomVersions {
+    /**
+     * The room version to use when creating "knock" rooms.
+     */
+    public static readonly KnockRooms = "7";
+
     /**
      * The room version to use when creating "restricted" rooms.
      */

test/PreferredRoomVersions-test.ts

@@ -36,6 +36,14 @@ describe("doesRoomVersionSupport", () => {
         expect(doesRoomVersionSupport("3.1", "2.2")).toBe(true); // newer
     });
 
+    it("should detect knock rooms in v7 and above", () => {
+        expect(doesRoomVersionSupport("6", PreferredRoomVersions.KnockRooms)).toBe(false);
+        expect(doesRoomVersionSupport("7", PreferredRoomVersions.KnockRooms)).toBe(true);
+        expect(doesRoomVersionSupport("8", PreferredRoomVersions.KnockRooms)).toBe(true);
+        expect(doesRoomVersionSupport("9", PreferredRoomVersions.KnockRooms)).toBe(true);
+        expect(doesRoomVersionSupport("10", PreferredRoomVersions.KnockRooms)).toBe(true);
+    });
+
     it("should detect restricted rooms in v9 and v10", () => {
         // Dev note: we consider it a feature that v8 rooms have to upgrade considering the bug in v8.
         // https://spec.matrix.org/v1.3/rooms/v8/#redactions

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

@@ -16,10 +16,11 @@ limitations under the License.
 
 import React from "react";
 import { fireEvent, render, screen, within } from "@testing-library/react";
-import { MatrixError, Preset, Visibility } from "matrix-js-sdk/src/matrix";
+import { JoinRule, MatrixError, Preset, Visibility } from "matrix-js-sdk/src/matrix";
 
 import CreateRoomDialog from "../../../../src/components/views/dialogs/CreateRoomDialog";
 import { flushPromises, getMockClientWithEventEmitter, mockClientMethodsUser } from "../../../test-utils";
+import SettingsStore from "../../../../src/settings/SettingsStore";
 
 describe("<CreateRoomDialog />", () => {
     const userId = "@alice:server.org";
@@ -208,6 +209,50 @@ describe("<CreateRoomDialog />", () => {
         });
     });
 
+    describe("for a knock room", () => {
+        it("should not have the option to create a knock room", async () => {
+            jest.spyOn(SettingsStore, "getValue").mockReturnValue(false);
+            getComponent();
+            fireEvent.click(screen.getByLabelText("Room visibility"));
+
+            expect(screen.queryByRole("option", { name: "Ask to join" })).not.toBeInTheDocument();
+        });
+
+        it("should create a knock room", async () => {
+            jest.spyOn(SettingsStore, "getValue").mockImplementation((setting) => setting === "feature_ask_to_join");
+            const onFinished = jest.fn();
+            getComponent({ onFinished });
+            await flushPromises();
+
+            const roomName = "Test Room Name";
+            fireEvent.change(screen.getByLabelText("Name"), { target: { value: roomName } });
+
+            fireEvent.click(screen.getByLabelText("Room visibility"));
+            fireEvent.click(screen.getByRole("option", { name: "Ask to join" }));
+
+            fireEvent.click(screen.getByText("Create room"));
+            await flushPromises();
+
+            expect(screen.getByText("Create a room")).toBeInTheDocument();
+
+            expect(
+                screen.getByText(
+                    "Anyone can request to join, but admins or moderators need to grant access. You can change this later.",
+                ),
+            ).toBeInTheDocument();
+
+            expect(onFinished).toHaveBeenCalledWith(true, {
+                createOpts: {
+                    name: roomName,
+                },
+                encryption: true,
+                joinRule: JoinRule.Knock,
+                parentSpace: undefined,
+                roomType: undefined,
+            });
+        });
+    });
+
     describe("for a public room", () => {
         it("should set join rule to public defaultPublic is truthy", async () => {
             const onFinished = jest.fn();