Add a note to use the desktop builds when seshat isn't available

res/css/_components.scss

@@ -100,6 +100,7 @@
 @import "./views/elements/_AccessibleButton.scss";
 @import "./views/elements/_AddressSelector.scss";
 @import "./views/elements/_AddressTile.scss";
+@import "./views/elements/_DesktopBuildsNotice.scss";
 @import "./views/elements/_DirectorySearchBox.scss";
 @import "./views/elements/_Dropdown.scss";
 @import "./views/elements/_EditableItemList.scss";

res/css/views/elements/_DesktopBuildsNotice.scss

@@ -0,0 +1,28 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+.mx_DesktopBuildsNotice {
+    text-align: center;
+    padding: 0 16px;
+
+    > * {
+        vertical-align: middle;
+    }
+
+    > img {
+        margin-right: 8px;
+    }
+}

res/css/views/rooms/_SearchBar.scss

@@ -68,3 +68,4 @@ limitations under the License.
         cursor: pointer;
     }
 }
+

src/SdkConfig.ts

@@ -33,6 +33,11 @@ export const DEFAULTS: ConfigOptions = {
         // Default conference domain
         preferredDomain: "jitsi.riot.im",
     },
+    desktopBuilds: {
+        available: true,
+        logo: require("../res/img/element-desktop-logo.svg"),
+        url: "https://element.io/get-started",
+    },
 };
 
 export default class SdkConfig {

src/components/structures/FilePanel.js

@@ -25,6 +25,7 @@ import EventIndexPeg from "../../indexing/EventIndexPeg";
 import { _t } from '../../languageHandler';
 import BaseCard from "../views/right_panel/BaseCard";
 import {RightPanelPhases} from "../../stores/RightPanelStorePhases";
+import DesktopBuildsNotice, {WarningKind} from "../views/elements/DesktopBuildsNotice";
 
 /*
  * Component which shows the filtered file using a TimelinePanel
@@ -222,6 +223,8 @@ class FilePanel extends React.Component {
             <p>{_t('Attach files from chat or just drag and drop them anywhere in a room.')}</p>
         </div>);
 
+        const isRoomEncrypted = this.noRoom ? false : MatrixClientPeg.get().isRoomEncrypted(this.props.roomId);
+
         if (this.state.timelineSet) {
             // console.log("rendering TimelinePanel for timelineSet " + this.state.timelineSet.room.roomId + " " +
             //             "(" + this.state.timelineSet._timelines.join(", ") + ")" + " with key " + this.props.roomId);
@@ -232,6 +235,7 @@ class FilePanel extends React.Component {
                     previousPhase={RightPanelPhases.RoomSummary}
                     withoutScrollContainer
                 >
+                    <DesktopBuildsNotice isRoomEncrypted={isRoomEncrypted} kind={WarningKind.Files} />
                     <TimelinePanel
                         manageReadReceipts={false}
                         manageReadMarkers={false}

src/components/structures/RoomView.tsx

@@ -1879,6 +1879,7 @@ export default class RoomView extends React.Component<IProps, IState> {
                 searchInProgress={this.state.searchInProgress}
                 onCancelClick={this.onCancelSearchClick}
                 onSearch={this.onSearch}
+                isRoomEncrypted={this.context.isRoomEncrypted(this.state.room.roomId)}
             />;
         } else if (showRoomUpgradeBar) {
             aux = <RoomUpgradeWarningBar room={this.state.room} recommendation={roomVersionRecommendation} />;

src/components/views/elements/DesktopBuildsNotice.tsx

@@ -0,0 +1,77 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import EventIndexPeg from "../../../indexing/EventIndexPeg";
+import { _t } from "../../../languageHandler";
+import SdkConfig from "../../../SdkConfig";
+import React from "react";
+
+export enum WarningKind {
+    Files,
+    Search,
+}
+
+interface IProps {
+    isRoomEncrypted: boolean;
+    kind: WarningKind;
+}
+
+export default function DesktopBuildsNotice({isRoomEncrypted, kind}: IProps) {
+    if (!isRoomEncrypted) return null;
+    if (EventIndexPeg.get()) return null;
+
+    const {desktopBuilds, brand} = SdkConfig.get();
+
+    let text = null;
+    let logo = null;
+    if (desktopBuilds.available) {
+        logo = <img src={desktopBuilds.logo} />;
+        switch (kind) {
+            case WarningKind.Files:
+                text = _t("Use the <a>Desktop app</a> to see encrypted files", {}, {
+                    a: sub => (<a href={desktopBuilds.url} target="_blank" rel="noreferrer noopener">{sub}</a>),
+                });
+                break;
+            case WarningKind.Search:
+                text = _t("Use the <a>Desktop app</a> to search encrypted messages", {}, {
+                    a: sub => (<a href={desktopBuilds.url} target="_blank" rel="noreferrer noopener">{sub}</a>),
+                });
+                break;
+        }
+    } else {
+        switch (kind) {
+            case WarningKind.Files:
+                text = _t("This version of %(brand)s does not support viewing encrypted files", {brand});
+                break;
+            case WarningKind.Search:
+                text = _t("This version of %(brand)s does not support searching encrypted messages", {brand});
+                break;
+        }
+    }
+
+    // for safety
+    if (!text) {
+        console.warn("Unknown desktop builds warning kind: ", kind);
+        return null;
+    }
+
+    return (
+        <div className="mx_DesktopBuildsNotice">
+            {logo}
+            <span>{text}</span>
+        </div>
+    );
+}