69 lines
2.2 KiB
JavaScript
69 lines
2.2 KiB
JavaScript
/*
|
|
Copyright 2017 Travis Ralston
|
|
Copyright 2019 New Vector Ltd.
|
|
|
|
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 SettingsHandler from "./SettingsHandler";
|
|
|
|
/**
|
|
* A wrapper for a SettingsHandler that performs local echo on
|
|
* changes to settings. This wrapper will use the underlying
|
|
* handler as much as possible to ensure values are not stale.
|
|
*/
|
|
export default class LocalEchoWrapper extends SettingsHandler {
|
|
/**
|
|
* Creates a new local echo wrapper
|
|
* @param {SettingsHandler} handler The handler to wrap
|
|
*/
|
|
constructor(handler) {
|
|
super();
|
|
this._handler = handler;
|
|
this._cache = {
|
|
// settingName: { roomId: value }
|
|
};
|
|
}
|
|
|
|
getValue(settingName, roomId) {
|
|
const cacheRoomId = roomId ? roomId : "UNDEFINED"; // avoid weird keys
|
|
const bySetting = this._cache[settingName];
|
|
if (bySetting && bySetting.hasOwnProperty(cacheRoomId)) {
|
|
return bySetting[cacheRoomId];
|
|
}
|
|
|
|
return this._handler.getValue(settingName, roomId);
|
|
}
|
|
|
|
setValue(settingName, roomId, newValue) {
|
|
if (!this._cache[settingName]) this._cache[settingName] = {};
|
|
const bySetting = this._cache[settingName];
|
|
|
|
const cacheRoomId = roomId ? roomId : "UNDEFINED"; // avoid weird keys
|
|
bySetting[cacheRoomId] = newValue;
|
|
|
|
const handlerPromise = this._handler.setValue(settingName, roomId, newValue);
|
|
return Promise.resolve(handlerPromise).finally(() => {
|
|
delete bySetting[cacheRoomId];
|
|
});
|
|
}
|
|
|
|
|
|
canSetValue(settingName, roomId) {
|
|
return this._handler.canSetValue(settingName, roomId);
|
|
}
|
|
|
|
isSupported() {
|
|
return this._handler.isSupported();
|
|
}
|
|
}
|