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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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16
src/settings/handlers/DeviceSettingsHandler.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.
@ -17,6 +18,7 @@ limitations under the License.
import Promise from 'bluebird';
import SettingsHandler from "./SettingsHandler";
import MatrixClientPeg from "../../MatrixClientPeg";
import {WatchManager} from "../WatchManager";
/**
* Gets and sets settings at the "device" level for the current device.
@ -31,6 +33,7 @@ export default class DeviceSettingsHandler extends SettingsHandler {
constructor(featureNames) {
super();
this._featureNames = featureNames;
this._watchers = new WatchManager();
}
getValue(settingName, roomId) {
@ -66,18 +69,22 @@ export default class DeviceSettingsHandler extends SettingsHandler {
// Special case notifications
if (settingName === "notificationsEnabled") {
localStorage.setItem("notifications_enabled", newValue);
this._watchers.notifyUpdate(settingName, null, newValue);
return Promise.resolve();
} else if (settingName === "notificationBodyEnabled") {
localStorage.setItem("notifications_body_enabled", newValue);
this._watchers.notifyUpdate(settingName, null, newValue);
return Promise.resolve();
} else if (settingName === "audioNotificationsEnabled") {
localStorage.setItem("audio_notifications_enabled", newValue);
this._watchers.notifyUpdate(settingName, null, newValue);
return Promise.resolve();
}
const settings = this._getSettings() || {};
settings[settingName] = newValue;
localStorage.setItem("mx_local_settings", JSON.stringify(settings));
this._watchers.notifyUpdate(settingName, null, newValue);
return Promise.resolve();
}
@ -90,6 +97,14 @@ export default class DeviceSettingsHandler extends SettingsHandler {
return localStorage !== undefined && localStorage !== null;
}
watchSetting(settingName, roomId, cb) {
this._watchers.watchSetting(settingName, roomId, cb);
}
unwatchSetting(cb) {
this._watchers.unwatchSetting(cb);
}
_getSettings() {
const value = localStorage.getItem("mx_local_settings");
if (!value) return null;
@ -111,5 +126,6 @@ export default class DeviceSettingsHandler extends SettingsHandler {
_writeFeature(featureName, enabled) {
localStorage.setItem("mx_labs_feature_" + featureName, enabled);
this._watchers.notifyUpdate(featureName, null, enabled);
}
}