add scaffolding for widget-based call

src/app/features/room/RoomView.tsx

@@ -1,4 +1,4 @@
-import React, { useCallback, useRef } from 'react';
+import React, { useCallback, useRef, useEffect } from 'react'; // Added useEffect
 import { Box, Text, config } from 'folds';
 import { EventType, Room } from 'matrix-js-sdk';
 import { ReactEditor } from 'slate-react';
@@ -23,6 +23,9 @@ import { settingsAtom } from '../../state/settings';
 import { useSetting } from '../../state/hooks/settings';
 import { useAccessibleTagColors, usePowerLevelTags } from '../../hooks/usePowerLevelTags';
 import { useTheme } from '../../hooks/useTheme';
+import { logger } from 'matrix-js-sdk/lib/logger';
+import { ClientWidgetApi, Widget, WidgetKind } from 'matrix-widget-api';
+import { SmallWidgetDriver } from './SmallWidgetDriver';
 
 const FN_KEYS_REGEX = /^F\d+$/;
 const shouldFocusMessageField = (evt: KeyboardEvent): boolean => {
@@ -57,9 +60,38 @@ const shouldFocusMessageField = (evt: KeyboardEvent): boolean => {
   return true;
 };
 
+// Keep this function to generate the URL
+const getWidgetUrl = (mx, roomId) => {
+  const baseUrl = window.location.href;
+  const params = new URLSearchParams({
+    embed: "true", // We're embedding EC within another application
+    widgetId: "test",
+    // Template variables are used, so that this can be configured using the  data.
+    preload: "$preload", // We want it to load in the background.
+    // skipLobby: "true", // Skip the lobby in case we show a lobby component of our own.
+    returnToLobby: "$returnToLobby", // Returns to the lobby (instead of blank screen) when the call ends. (For video rooms)
+    perParticipantE2EE: "$perParticipantE2EE",
+    hideHeader: "true", // Hide the header since our room header is enough
+    userId: mx.getUserId()!,
+    deviceId: mx.getDeviceId()!,
+    roomId: roomId,
+    baseUrl: window.location.href,
+    parentUrl: baseUrl,
+    // lang: getCurrentLanguage().replace("_", "-"),
+    // fontScale: (FontWatcher.getRootFontSize() / FontWatcher.getBrowserDefaultFontSize()).toString(),
+    theme: "$org.matrix.msc2873.client_theme",
+});
+const replacedUrl = params.toString().replace(/%24/g, "$");
+const url= 'https://elementcall.example.quest' + `#?${replacedUrl}`;
+logger.error(url);
+  return url;
+}
+
+
 export function RoomView({ room, eventId }: { room: Room; eventId?: string }) {
   const roomInputRef = useRef<HTMLDivElement>(null);
   const roomViewRef = useRef<HTMLDivElement>(null);
+  const iframeRef = useRef<HTMLIFrameElement>(null); // Ref for the iframe
 
   const [hideActivity] = useSetting(settingsAtom, 'hideActivity');
 
@@ -80,31 +112,117 @@ export function RoomView({ room, eventId }: { room: Room; eventId?: string }) {
   const theme = useTheme();
   const accessibleTagColors = useAccessibleTagColors(theme.kind, powerLevelTags);
 
+  const isCall = room.isCallRoom(); // Determine if it's a call room
+
   useKeyDown(
     window,
     useCallback(
       (evt) => {
         if (editableActiveElement()) return;
-        if (
+        // Check modal visibility more robustly if needed
-          document.body.lastElementChild?.className !== 'ReactModalPortal' ||
+        if (document.querySelector('.ReactModalPortal > *')) { // Simple check if any modal portal has content
-          navigation.isRawModalVisible
+             if (navigation.isRawModalVisible) return; // Skip if raw modal is explicitly visible
-        ) {
+             // Add other modal checks if necessary
-          return;
         }
+
         if (shouldFocusMessageField(evt) || isKeyHotkey('mod+v', evt)) {
+          // Only focus editor if not in a call view where editor isn't present
+          if (!isCall && editor) {
              ReactEditor.focus(editor);
           }
+        }
       },
-      [editor]
+      [editor, isCall] // Add isCall dependency
     )
   );
 
+  // Effect to setup the widget API when the iframe is mounted for a call room
+  useEffect(() => {
+    let widgetApi: ClientWidgetApi | null = null;
+    let driver: SmallWidgetDriver | null = null;
+
+    // Only run setup if it's a call room and the iframe ref is available
+    if (isCall && iframeRef.current) {
+      const iframe = iframeRef.current;
+      const url = getWidgetUrl(mx, roomId);
+
+      // Update iframe src if necessary (though it's set in JSX, this ensures it if URL changes)
+      if (iframe.src !== url) {
+        iframe.src = url;
+      }
+
+      logger.info(`Setting up widget API for room ${roomId}`);
+
+      const widget = new Widget({
+        id: 'test-call-widget', // Match ID used in URL params
+        creatorUserId: mx.getUserId()!,
+        type: 'm.custom', // Or appropriate widget type e.g., m.video
+        url: url,
+        roomId: roomId, // Pass roomId if needed by Widget constructor
+        waitForIframeLoad: false,
+        // Add other necessary Widget properties
+      });
+
+      // Ensure driver is correctly instantiated with necessary parameters
+      // The second argument `[]` might need adjustment based on SmallWidgetDriver's needs (e.g., allowed capabilities)
+      driver = new SmallWidgetDriver(mx, [], widget, WidgetKind.Room, true, roomId);
+
+      widgetApi = new ClientWidgetApi(widget, iframe, driver);
+      // widgetApi.start(); // Start communication if required by your setup
+
+      // Return a cleanup function
+      return () => {
+        logger.info(`Cleaning up widget API for room ${roomId}`);
+        // Implement proper cleanup for ClientWidgetApi and SmallWidgetDriver
+        // This might involve calling stop methods, removing listeners, etc.
+        // Example: widgetApi?.stop();
+        // Example: driver?.stop();
+        widgetApi = null;
+        driver = null;
+        // Clear iframe src to stop loading/activity
+        if (iframeRef.current) {
+            iframeRef.current.src = 'about:blank';
+        }
+      };
+    }
+
+    // If it's not a call room or the iframe isn't ready, ensure no setup runs/is cleaned up
+    return undefined;
+
+  }, [isCall, mx, roomId]); // Dependencies: run effect if call status, client, or room ID changes
+
+
+  // Render Call View
+  if (isCall) {
+    const url = getWidgetUrl(mx, roomId);
+    return (
+      // Attach roomViewRef here if <Page> is the main container you want to reference
+      <Page ref={roomViewRef} style={{ display: 'flex', flexDirection: 'column', height: '100%' }}>
+        <RoomViewHeader />
+        {/* Embed the iframe directly. Ensure parent has definite height or use flex grow */}
+        <Box grow="Yes" style={{ overflow: 'hidden' }}> {/* Use Box with grow */}
+            <iframe
+              ref={iframeRef}
+              src={url} // Set initial source
+              style={{ width: '100%', height: '100%', border: 'none' }}
+              title={`Element Call - ${room.name || roomId}`} // Accessible title
+              // Add necessary sandbox/allow attributes for WebRTC, etc.
+              sandbox="allow-forms allow-scripts allow-same-origin allow-popups allow-downloads"
+              allow="microphone; camera; display-capture; autoplay;"
+            />
+        </Box>
+         {/* You might want a minimal footer or status bar here */}
+      </Page>
+    );
+  }
+
+  // Render Standard Text/Timeline Room View
   return (
     <Page ref={roomViewRef}>
       <RoomViewHeader />
       <Box grow="Yes" direction="Column">
         <RoomTimeline
-          key={roomId}
+          key={roomId} // Key helps React reset state when room changes
           room={room}
           eventId={eventId}
           roomInputRef={roomInputRef}
@@ -124,18 +242,17 @@ export function RoomView({ room, eventId }: { room: Room; eventId?: string }) {
             />
           ) : (
             <>
-              {canMessage && (
+              {canMessage ? (
                 <RoomInput
                   room={room}
                   editor={editor}
                   roomId={roomId}
-                  fileDropContainerRef={roomViewRef}
+                  fileDropContainerRef={roomViewRef} // Pass the Page ref here if needed
                   ref={roomInputRef}
                   getPowerLevelTag={getPowerLevelTag}
                   accessibleTagColors={accessibleTagColors}
                 />
-              )}
+              ) : (
-              {!canMessage && (
                 <RoomInputPlaceholder
                   style={{ padding: config.space.S200 }}
                   alignItems="Center"