Offer a way to create a space based on existing community

src/components/structures/GroupView.js

@@ -399,6 +399,8 @@ class FeaturedUser extends React.Component {
 const GROUP_JOINPOLICY_OPEN = "open";
 const GROUP_JOINPOLICY_INVITE = "invite";
 
+const UPGRADE_NOTICE_LS_KEY = "mx_hide_community_upgrade_notice";
+
 @replaceableComponent("structures.GroupView")
 export default class GroupView extends React.Component {
     static propTypes = {
@@ -422,6 +424,7 @@ export default class GroupView extends React.Component {
         publicityBusy: false,
         inviterProfile: null,
         showRightPanel: RightPanelStore.getSharedInstance().isOpenForGroup,
+        showUpgradeNotice: !localStorage.getItem(UPGRADE_NOTICE_LS_KEY),
     };
 
     componentDidMount() {
@@ -807,6 +810,11 @@ export default class GroupView extends React.Component {
         showGroupAddRoomDialog(this.props.groupId);
     };
 
+    _dismissUpgradeNotice = () => {
+        localStorage.setItem(UPGRADE_NOTICE_LS_KEY, "true");
+        this.setState({ showUpgradeNotice: false });
+    }
+
     _getGroupSection() {
         const groupSettingsSectionClasses = classnames({
             "mx_GroupView_group": this.state.editing,
@@ -843,10 +851,28 @@ export default class GroupView extends React.Component {
                     },
                 ) }
             </div> : <div />;
+
+        let communitiesUpgradeNotice;
+        if (this.state.showUpgradeNotice) {
+            communitiesUpgradeNotice = <div className="mx_GroupView_spaceUpgradePrompt">
+                <h2>{ _t("Communities can now be made into Spaces") }</h2>
+                <p>
+                    { _t("Spaces are a new way to make a community, with new features coming.") }
+                    &nbsp;
+                    { _t("Ask the admins of this community to make it into a Space " +
+                        "and keep a look out for the invite.") }
+                    &nbsp;
+                    { _t("Communities won't receive further updates.") }
+                </p>
+                <AccessibleButton onClick={this._dismissUpgradeNotice} />
+            </div>;
+        }
+
         return <div className={groupSettingsSectionClasses}>
             { header }
             { hostingSignup }
             { changeDelayWarning }
+            { communitiesUpgradeNotice }
             { this._getJoinableNode() }
             { this._getLongDescriptionNode() }
             { this._getRoomsNode() }

src/components/structures/SpaceRoomView.tsx

@@ -74,6 +74,10 @@ import { BetaPill } from "../views/beta/BetaCard";
 import { UserTab } from "../views/dialogs/UserSettingsDialog";
 import { EffectiveMembership, getEffectiveMembership } from "../../utils/membership";
 import { SpaceFeedbackPrompt } from "../views/spaces/SpaceCreateMenu";
+import { CreateEventField, IGroupSummary } from "../views/dialogs/CreateSpaceFromCommunityDialog";
+import { useAsyncMemo } from "../../hooks/useAsyncMemo";
+import Spinner from "../views/elements/Spinner";
+import GroupAvatar from "../views/avatars/GroupAvatar";
 
 interface IProps {
     space: Room;
@@ -158,7 +162,33 @@ const onBetaClick = () => {
     });
 };
 
-const SpacePreview = ({ space, onJoinButtonClicked, onRejectButtonClicked }) => {
+// XXX: temporary community migration component
+const GroupTile = ({ groupId }: { groupId: string }) => {
+    const cli = useContext(MatrixClientContext);
+    const groupSummary = useAsyncMemo<IGroupSummary>(() => cli.getGroupSummary(groupId), [cli, groupId]);
+
+    if (!groupSummary) return <Spinner />;
+
+    return <>
+        <GroupAvatar
+            groupId={groupId}
+            groupName={groupSummary.profile.name}
+            groupAvatarUrl={groupSummary.profile.avatar_url}
+            width={16}
+            height={16}
+            resizeMethod='crop'
+        />
+        { groupSummary.profile.name }
+    </>;
+};
+
+interface ISpacePreviewProps {
+    space: Room;
+    onJoinButtonClicked(): void;
+    onRejectButtonClicked(): void;
+}
+
+const SpacePreview = ({ space, onJoinButtonClicked, onRejectButtonClicked }: ISpacePreviewProps) => {
     const cli = useContext(MatrixClientContext);
     const myMembership = useMyRoomMembership(space);
 
@@ -270,8 +300,18 @@ const SpacePreview = ({ space, onJoinButtonClicked, onRejectButtonClicked }) =>
         </div>;
     }
 
+    let migratedCommunitySection: JSX.Element;
+    const createContent = space.currentState.getStateEvents(EventType.RoomCreate, "")?.getContent();
+    if (createContent[CreateEventField]) {
+        migratedCommunitySection = <div className="mx_SpaceRoomView_preview_migratedCommunity">
+            { _t("Created from <Community />", {}, {
+                Community: () => <GroupTile groupId={createContent[CreateEventField]} />,
+            }) }
+        </div>;
+    }
+
     return <div className="mx_SpaceRoomView_preview">
-        <BetaPill onClick={onBetaClick} />
+        { migratedCommunitySection }
         { inviterSection }
         <RoomAvatar room={space} height={80} width={80} viewAvatarOnClick={true} />
         <h1 className="mx_SpaceRoomView_preview_name">