Convert RoomCreate to TS

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

src/components/views/messages/RoomCreate.tsx

@@ -0,0 +1,69 @@
+/*
+Copyright 2018 New Vector Ltd
+Copyright 2019 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 React from 'react';
+
+import dis from '../../../dispatcher/dispatcher';
+import { RoomPermalinkCreator } from '../../../utils/permalinks/Permalinks';
+import { _t } from '../../../languageHandler';
+import { MatrixClientPeg } from '../../../MatrixClientPeg';
+import EventTileBubble from "./EventTileBubble";
+import { replaceableComponent } from "../../../utils/replaceableComponent";
+import { MatrixEvent } from "matrix-js-sdk/src/models/event";
+
+interface IProps {
+    /* the MatrixEvent to show */
+    mxEvent: MatrixEvent;
+}
+
+@replaceableComponent("views.messages.RoomCreate")
+export default class RoomCreate extends React.Component<IProps> {
+    private onLinkClicked = (e: React.MouseEvent): void => {
+        e.preventDefault();
+
+        const predecessor = this.props.mxEvent.getContent()['predecessor'];
+
+        dis.dispatch({
+            action: 'view_room',
+            event_id: predecessor['event_id'],
+            highlighted: true,
+            room_id: predecessor['room_id'],
+        });
+    };
+
+    public render(): JSX.Element {
+        const predecessor = this.props.mxEvent.getContent()['predecessor'];
+        if (predecessor === undefined) {
+            return <div />; // We should never have been instantiated in this case
+        }
+        const prevRoom = MatrixClientPeg.get().getRoom(predecessor['room_id']);
+        const permalinkCreator = new RoomPermalinkCreator(prevRoom, predecessor['room_id']);
+        permalinkCreator.load();
+        const predecessorPermalink = permalinkCreator.forEvent(predecessor['event_id']);
+        const link = (
+            <a href={predecessorPermalink} onClick={this.onLinkClicked}>
+                { _t("Click here to see older messages.") }
+            </a>
+        );
+
+        return <EventTileBubble
+            className="mx_CreateEvent"
+            title={_t("This room is a continuation of another conversation.")}
+            subtitle={link}
+        />;
+    }
+}