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Implement support for watching for changes in settings

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This implements a dream of one day being able to listen for changes in a settings to react to them, regardless of which device actually changed the setting. The use case for this kind of thing is extremely limited, but when it is needed it should be more than powerful enough.
This commit is contained in:
Travis Ralston 2019-02-22 16:33:20 -07:00
parent 150c941340
commit 7ea4008daa
14 changed files with 484 additions and 7 deletions
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48
src/settings/handlers/AccountSettingsHandler.js
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@ -1,5 +1,6 @@
/*
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.
@ -14,14 +15,49 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import SettingsHandler from "./SettingsHandler";
import MatrixClientPeg from '../../MatrixClientPeg';
import {WatchManager} from "../WatchManager";
import MatrixClientBackedSettingsHandler from "./MatrixClientBackedSettingsHandler";
/**
* Gets and sets settings at the "account" level for the current user.
* This handler does not make use of the roomId parameter.
*/
export default class AccountSettingHandler extends SettingsHandler {
export default class AccountSettingsHandler extends MatrixClientBackedSettingsHandler {
constructor() {
super();
this._watchers = new WatchManager();
this._onAccountData = this._onAccountData.bind(this);
}
initMatrixClient(oldClient, newClient) {
if (oldClient) {
oldClient.removeListener("accountData", this._onAccountData);
}
newClient.on("accountData", this._onAccountData);
}
_onAccountData(event) {
if (event.getType() === "org.matrix.preview_urls") {
let val = event.getContent()['disable'];
if (typeof(val) !== "boolean") {
val = null;
} else {
val = !val;
}
this._watchers.notifyUpdate("urlPreviewsEnabled", null, val);
} else if (event.getType() === "im.vector.web.settings") {
// We can't really discern what changed, so trigger updates for everything
for (const settingName of Object.keys(event.getContent())) {
console.log(settingName);
this._watchers.notifyUpdate(settingName, null, event.getContent()[settingName]);
}
}
}
getValue(settingName, roomId) {
// Special case URL previews
if (settingName === "urlPreviewsEnabled") {
@ -67,6 +103,14 @@ export default class AccountSettingHandler extends SettingsHandler {
return cli !== undefined && cli !== null;
}
watchSetting(settingName, roomId, cb) {
this._watchers.watchSetting(settingName, roomId, cb);
}
unwatchSetting(cb) {
this._watchers.unwatchSetting(cb);
}
_getSettings(eventType = "im.vector.web.settings") {
const cli = MatrixClientPeg.get();
if (!cli) return null;