Convert RoomSettingsHandler to TS

src/settings/handlers/RoomSettingsHandler.ts

@@ -0,0 +1,126 @@
+/*
+Copyright 2017 Travis Ralston
+Copyright 2019, 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 { MatrixClientPeg } from '../../MatrixClientPeg';
+import MatrixClientBackedSettingsHandler from "./MatrixClientBackedSettingsHandler";
+import { objectClone, objectKeyChanges } from "../../utils/objects";
+import { SettingLevel } from "../SettingLevel";
+import { WatchManager } from "../WatchManager";
+import { MatrixClient } from "matrix-js-sdk/src/client";
+import { MatrixEvent } from "matrix-js-sdk/src/models/event";
+import { RoomState } from "matrix-js-sdk/src/models/room-state";
+
+/**
+ * Gets and sets settings at the "room" level.
+ */
+export default class RoomSettingsHandler extends MatrixClientBackedSettingsHandler {
+    constructor(private watchers: WatchManager) {
+        super();
+    }
+
+    protected initMatrixClient(oldClient: MatrixClient, newClient: MatrixClient) {
+        if (oldClient) {
+            oldClient.removeListener("RoomState.events", this._onEvent);
+        }
+
+        newClient.on("RoomState.events", this._onEvent);
+    }
+
+    private _onEvent = (event: MatrixEvent, state: RoomState, prevEvent: MatrixEvent) => {
+        const roomId = event.getRoomId();
+        const room = this.client.getRoom(roomId);
+
+        // Note: in tests and during the encryption setup on initial load we might not have
+        // rooms in the store, so we just quietly ignore the problem. If we log it then we'll
+        // just end up spamming the logs a few thousand times. It is perfectly fine for us
+        // to ignore the problem as the app will not have loaded enough to care yet.
+        if (!room) return;
+
+        // ignore state updates which are not current
+        if (room && state !== room.currentState) return;
+
+        if (event.getType() === "org.matrix.room.preview_urls") {
+            let val = event.getContent()['disable'];
+            if (typeof (val) !== "boolean") {
+                val = null;
+            } else {
+                val = !val;
+            }
+
+            this.watchers.notifyUpdate("urlPreviewsEnabled", roomId, SettingLevel.ROOM, val);
+        } else if (event.getType() === "im.vector.web.settings") {
+            // Figure out what changed and fire those updates
+            const prevContent = prevEvent ? prevEvent.getContent() : {};
+            const changedSettings = objectKeyChanges(prevContent, event.getContent());
+            for (const settingName of changedSettings) {
+                this.watchers.notifyUpdate(settingName, roomId, SettingLevel.ROOM, event.getContent()[settingName]);
+            }
+        }
+    };
+
+    public getValue(settingName: string, roomId: string): any {
+        // Special case URL previews
+        if (settingName === "urlPreviewsEnabled") {
+            const content = this.getSettings(roomId, "org.matrix.room.preview_urls") || {};
+
+            // Check to make sure that we actually got a boolean
+            if (typeof (content['disable']) !== "boolean") return null;
+            return !content['disable'];
+        }
+
+        const settings = this.getSettings(roomId) || {};
+        return settings[settingName];
+    }
+
+    public setValue(settingName: string, roomId: string, newValue: any): Promise<void> {
+        // Special case URL previews
+        if (settingName === "urlPreviewsEnabled") {
+            const content = this.getSettings(roomId, "org.matrix.room.preview_urls") || {};
+            content['disable'] = !newValue;
+            return MatrixClientPeg.get().sendStateEvent(roomId, "org.matrix.room.preview_urls", content);
+        }
+
+        const content = this.getSettings(roomId) || {};
+        content[settingName] = newValue;
+        return MatrixClientPeg.get().sendStateEvent(roomId, "im.vector.web.settings", content, "");
+    }
+
+    public canSetValue(settingName: string, roomId: string): boolean {
+        const cli = MatrixClientPeg.get();
+        const room = cli.getRoom(roomId);
+
+        let eventType = "im.vector.web.settings";
+        if (settingName === "urlPreviewsEnabled") eventType = "org.matrix.room.preview_urls";
+
+        if (!room) return false;
+        return room.currentState.maySendStateEvent(eventType, cli.getUserId());
+    }
+
+    public isSupported(): boolean {
+        const cli = MatrixClientPeg.get();
+        return cli !== undefined && cli !== null;
+    }
+
+    private getSettings(roomId: string, eventType = "im.vector.web.settings"): any {
+        const room = MatrixClientPeg.get().getRoom(roomId);
+        if (!room) return null;
+
+        const event = room.currentState.getStateEvents(eventType, "");
+        if (!event || !event.getContent()) return null;
+        return objectClone(event.getContent()); // clone to prevent mutation
+    }
+}