Call guest access link creation to join calls as a non registered user via the EC SPA

src/IConfigOptions.ts

@@ -119,6 +119,7 @@ export interface IConfigOptions {
     };
     element_call: {
         url?: string;
+        guest_spa_url?: string;
         use_exclusively?: boolean;
         participant_limit?: number;
         brand?: string;

src/components/views/dialogs/ShareDialog.tsx

@@ -62,11 +62,28 @@ const socials = [
 ];
 
 interface BaseProps {
+    /**
+     * A function that is called when the dialog is dismissed
+     */
     onFinished(): void;
+    /**
+     * An optional string to use as the dialog title.
+     * If not provided, an appropriate title for the target type will be used.
+     */
+    customTitle?: string;
+    /**
+     * An optional string to use as the dialog subtitle
+     */
+    subtitle?: string;
 }
 
 interface Props extends BaseProps {
-    target: Room | User | RoomMember;
+    /**
+     * The target to link to.
+     * This can be a Room, User, RoomMember, or MatrixEvent or an already computed URL.
+     * A <u>matrix.to</u> link will be generated out of it if it's not already a url.
+     */
+    target: Room | User | RoomMember | URL;
     permalinkCreator?: RoomPermalinkCreator;
 }
 
@@ -109,7 +126,9 @@ export default class ShareDialog extends React.PureComponent<XOR<Props, EventPro
     };
 
     private getUrl(): string {
-        if (this.props.target instanceof Room) {
+        if (this.props.target instanceof URL) {
+            return this.props.target.toString();
+        } else if (this.props.target instanceof Room) {
             if (this.state.linkSpecificEvent) {
                 const events = this.props.target.getLiveTimeline().getEvents();
                 return this.state.permalinkCreator!.forEvent(events[events.length - 1].getId()!);
@@ -129,8 +148,10 @@ export default class ShareDialog extends React.PureComponent<XOR<Props, EventPro
         let title: string | undefined;
         let checkbox: JSX.Element | undefined;
 
-        if (this.props.target instanceof Room) {
-            title = _t("share|title_room");
+        if (this.props.target instanceof URL) {
+            title = this.props.customTitle ?? _t("share|title_link");
+        } else if (this.props.target instanceof Room) {
+            title = this.props.customTitle ?? _t("share|title_room");
 
             const events = this.props.target.getLiveTimeline().getEvents();
             if (events.length > 0) {
@@ -146,9 +167,9 @@ export default class ShareDialog extends React.PureComponent<XOR<Props, EventPro
                 );
             }
         } else if (this.props.target instanceof User || this.props.target instanceof RoomMember) {
-            title = _t("share|title_user");
+            title = this.props.customTitle ?? _t("share|title_user");
         } else if (this.props.target instanceof MatrixEvent) {
-            title = _t("share|title_message");
+            title = this.props.customTitle ?? _t("share|title_message");
             checkbox = (
                 <div>
                     <StyledCheckbox
@@ -206,6 +227,7 @@ export default class ShareDialog extends React.PureComponent<XOR<Props, EventPro
                 contentId="mx_Dialog_content"
                 onFinished={this.props.onFinished}
             >
+                {this.props.subtitle && <p>{this.props.subtitle}</p>}
                 <div className="mx_ShareDialog_content">
                     <CopyableText getTextToCopy={() => matrixToUrl}>
                         <a title={_t("share|link_title")} href={matrixToUrl} onClick={ShareDialog.onLinkClick}>

src/components/views/rooms/RoomHeader.tsx

@@ -18,6 +18,7 @@ import React, { useCallback, useEffect, useMemo, useState } from "react";
 import { Body as BodyText, Button, IconButton, Menu, MenuItem, Tooltip } from "@vector-im/compound-web";
 import { Icon as VideoCallIcon } from "@vector-im/compound-design-tokens/icons/video-call-solid.svg";
 import { Icon as VoiceCallIcon } from "@vector-im/compound-design-tokens/icons/voice-call.svg";
+import { Icon as ExternalLinkIcon } from "@vector-im/compound-design-tokens/icons/link.svg";
 import { Icon as CloseCallIcon } from "@vector-im/compound-design-tokens/icons/close.svg";
 import { Icon as ThreadsIcon } from "@vector-im/compound-design-tokens/icons/threads-solid.svg";
 import { Icon as NotificationsIcon } from "@vector-im/compound-design-tokens/icons/notifications-solid.svg";
@@ -26,6 +27,7 @@ import { Icon as ErrorIcon } from "@vector-im/compound-design-tokens/icons/error
 import { Icon as PublicIcon } from "@vector-im/compound-design-tokens/icons/public.svg";
 import { EventType, JoinRule, type Room } from "matrix-js-sdk/src/matrix";
 import { ViewRoomOpts } from "@matrix-org/react-sdk-module-api/lib/lifecycles/RoomViewLifecycle";
+import { logger } from "matrix-js-sdk/src/logger";
 
 import { useRoomName } from "../../../hooks/useRoomName";
 import { RightPanelPhases } from "../../../stores/right-panel/RightPanelStorePhases";
@@ -54,6 +56,8 @@ import { VideoRoomChatButton } from "./RoomHeader/VideoRoomChatButton";
 import { RoomKnocksBar } from "./RoomKnocksBar";
 import { isVideoRoom } from "../../../utils/video-rooms";
 import { notificationLevelToIndicator } from "../../../utils/notifications";
+import Modal from "../../../Modal";
+import ShareDialog from "../dialogs/ShareDialog";
 
 export default function RoomHeader({
     room,
@@ -78,6 +82,8 @@ export default function RoomHeader({
         videoCallClick,
         toggleCallMaximized: toggleCall,
         isViewingCall,
+        generateCallLink,
+        canGenerateCallLink,
         isConnectedToCall,
         hasActiveCallSession,
         callOptions,
@@ -118,14 +124,34 @@ export default function RoomHeader({
 
     const videoClick = useCallback((ev) => videoCallClick(ev, callOptions[0]), [callOptions, videoCallClick]);
 
+    const shareClick = useCallback(() => {
+        try {
+            // generateCallLink throws if the permissions are not met
+            const target = generateCallLink();
+            Modal.createDialog(ShareDialog, {
+                target,
+                customTitle: _t("share|share_call"),
+                subtitle: _t("share|share_call_subtitle"),
+            });
+        } catch (e) {
+            logger.error("Could not generate call link.", e);
+        }
+    }, [generateCallLink]);
+
     const toggleCallButton = (
         <Tooltip label={isViewingCall ? _t("voip|minimise_call") : _t("voip|maximise_call")}>
             <IconButton onClick={toggleCall}>
                 <VideoCallIcon />
             </IconButton>
         </Tooltip>
     );
-
+    const createExternalLinkButton = (
+        <Tooltip label={_t("voip|get_call_link")}>
+            <IconButton onClick={shareClick} aria-label={_t("voip|get_call_link")}>
+                <ExternalLinkIcon />
+            </IconButton>
+        </Tooltip>
+    );
     const joinCallButton = (
         <Tooltip label={videoCallDisabledReason ?? _t("voip|video_call")}>
             <Button
@@ -309,7 +335,7 @@ export default function RoomHeader({
                             </Tooltip>
                         );
                     })}
-
+                    {isViewingCall && canGenerateCallLink && createExternalLinkButton}
                     {((isConnectedToCall && isViewingCall) || isVideoRoom(room)) && <VideoRoomChatButton room={room} />}
 
                     {hasActiveCallSession && !isConnectedToCall && !isViewingCall ? (

src/hooks/room/useRoomCall.ts

@@ -14,9 +14,10 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import { Room } from "matrix-js-sdk/src/matrix";
+import { JoinRule, Room } from "matrix-js-sdk/src/matrix";
 import React, { useCallback, useEffect, useMemo, useState } from "react";
 import { CallType } from "matrix-js-sdk/src/webrtc/call";
+import { logger } from "matrix-js-sdk/src/logger";
 
 import { useFeatureEnabled } from "../useSettings";
 import SdkConfig from "../../SdkConfig";
@@ -39,6 +40,7 @@ import defaultDispatcher from "../../dispatcher/dispatcher";
 import { ViewRoomPayload } from "../../dispatcher/payloads/ViewRoomPayload";
 import { Action } from "../../dispatcher/actions";
 import { CallStore, CallStoreEvent } from "../../stores/CallStore";
+import { calculateRoomVia } from "../../utils/permalinks/Permalinks";
 
 export enum PlatformCallType {
     ElementCall,
@@ -78,27 +80,35 @@ export const useRoomCall = (
     videoCallClick(evt: React.MouseEvent | undefined, selectedType: PlatformCallType): void;
     toggleCallMaximized: () => void;
     isViewingCall: boolean;
+    generateCallLink: () => URL;
+    canGenerateCallLink: boolean;
     isConnectedToCall: boolean;
     hasActiveCallSession: boolean;
     callOptions: PlatformCallType[];
 } => {
+    // settings
     const groupCallsEnabled = useFeatureEnabled("feature_group_calls");
     const useElementCallExclusively = useMemo(() => {
         return SdkConfig.get("element_call").use_exclusively;
     }, []);
 
+    const guestSpaUrl = useMemo(() => {
+        return SdkConfig.get("element_call").guest_spa_url;
+    }, []);
+
     const hasLegacyCall = useEventEmitterState(
         LegacyCallHandler.instance,
         LegacyCallHandlerEvent.CallsChanged,
         () => LegacyCallHandler.instance.getCallForRoom(room.roomId) !== null,
     );
-
+    // settings
     const widgets = useWidgets(room);
     const jitsiWidget = useMemo(() => widgets.find((widget) => WidgetType.JITSI.matches(widget.type)), [widgets]);
     const hasJitsiWidget = !!jitsiWidget;
     const managedHybridWidget = useMemo(() => widgets.find(isManagedHybridWidget), [widgets]);
     const hasManagedHybridWidget = !!managedHybridWidget;
 
+    // group call
     const groupCall = useCall(room.roomId);
     const isConnectedToCall = useConnectionState(groupCall) === ConnectionState.Connected;
     const hasGroupCall = groupCall !== null;
@@ -107,11 +117,14 @@ export const useRoomCall = (
         SdkContextClass.instance.roomViewStore.isViewingCall(),
     );
 
+    // room
     const memberCount = useRoomMemberCount(room);
 
-    const [mayEditWidgets, mayCreateElementCalls] = useRoomState(room, () => [
+    const [mayEditWidgets, mayCreateElementCalls, canJoinWithoutInvite] = useRoomState(room, () => [
         room.currentState.mayClientSendStateEvent("im.vector.modular.widgets", room.client),
         room.currentState.mayClientSendStateEvent(ElementCall.MEMBER_EVENT_TYPE.name, room.client),
+        room.getJoinRule() === "public" || room.getJoinRule() === JoinRule.Knock,
+        /*|| room.getJoinRule() === JoinRule.Restricted <- rule for joining via token?*/
     ]);
 
     // The options provided to the RoomHeader.
@@ -131,7 +144,7 @@ export const useRoomCall = (
                 return [PlatformCallType.ElementCall];
             }
             if (hasGroupCall && WidgetType.CALL.matches(groupCall.widget.type)) {
-                // only allow joining joining the ongoing Element call if there is one.
+                // only allow joining the ongoing Element call if there is one.
                 return [PlatformCallType.ElementCall];
             }
         }
@@ -258,6 +271,26 @@ export const useRoomCall = (
         });
     }, [isViewingCall, room.roomId]);
 
+    const generateCallLink = useCallback(() => {
+        if (!canJoinWithoutInvite)
+            throw new Error("Cannot create link for room that users can not join without invite.");
+        if (!guestSpaUrl) throw new Error("No guest SPA url for external links provided.");
+        const url = new URL(guestSpaUrl);
+        url.pathname = "/room/";
+        // Set params for the sharable url
+        url.searchParams.set("roomId", room.roomId);
+        url.searchParams.set("perParticipantE2EE", "true");
+        for (const server of calculateRoomVia(room)) {
+            url.searchParams.set("viaServers", server);
+        }
+
+        // Move params into hash
+        url.hash = "/" + room.name + url.search;
+        url.search = "";
+
+        logger.info("Generated element call external url:", url);
+        return url;
+    }, [canJoinWithoutInvite, guestSpaUrl, room]);
     /**
      * We've gone through all the steps
      */
@@ -268,6 +301,8 @@ export const useRoomCall = (
         videoCallClick,
         toggleCallMaximized: toggleCallMaximized,
         isViewingCall: isViewingCall,
+        generateCallLink,
+        canGenerateCallLink: guestSpaUrl !== undefined && canJoinWithoutInvite,
         isConnectedToCall: isConnectedToCall,
         hasActiveCallSession: hasActiveCallSession,
         callOptions,

src/i18n/strings/en_EN.json

@@ -2896,6 +2896,9 @@
         "link_title": "Link to room",
         "permalink_message": "Link to selected message",
         "permalink_most_recent": "Link to most recent message",
+        "share_call": "Conference invite link",
+        "share_call_subtitle": "Link for external users to join the call without a matrix account:",
+        "title_link": "Share Link",
         "title_message": "Share Room Message",
         "title_room": "Share Room",
         "title_user": "Share User"
@@ -3828,6 +3831,7 @@
         "expand": "Return to call",
         "failed_call_live_broadcast_description": "You can’t start a call as you are currently recording a live broadcast. Please end your live broadcast in order to start a call.",
         "failed_call_live_broadcast_title": "Can’t start a call",
+        "get_call_link": "Share call link",
         "hangup": "Hangup",
         "hide_sidebar_button": "Hide sidebar",
         "input_devices": "Input devices",