94 lines
2.7 KiB
TypeScript
94 lines
2.7 KiB
TypeScript
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import { get, throttle } from 'lodash';
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import { WebAPIType } from './textsecure/WebAPI';
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type ConfigKeyType = 'desktop.messageRequests';
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type ConfigValueType = {
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name: ConfigKeyType;
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enabled: boolean;
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enabledAt?: number;
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};
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type ConfigMapType = { [key: string]: ConfigValueType };
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type ConfigListenerType = (value: ConfigValueType) => unknown;
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type ConfigListenersMapType = {
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[key: string]: Array<ConfigListenerType>;
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};
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function getServer(): WebAPIType {
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const OLD_USERNAME = window.storage.get<string>('number_id');
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const USERNAME = window.storage.get<string>('uuid_id');
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const PASSWORD = window.storage.get<string>('password');
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return window.WebAPI.connect({
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username: (USERNAME || OLD_USERNAME) as string,
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password: PASSWORD as string,
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});
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}
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let config: ConfigMapType = {};
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const listeners: ConfigListenersMapType = {};
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export async function initRemoteConfig() {
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config = window.storage.get('remoteConfig') || {};
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await maybeRefreshRemoteConfig();
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}
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export function onChange(key: ConfigKeyType, fn: ConfigListenerType) {
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const keyListeners: Array<ConfigListenerType> = get(listeners, key, []);
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keyListeners.push(fn);
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listeners[key] = keyListeners;
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return () => {
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listeners[key] = listeners[key].filter(l => l !== fn);
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};
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}
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const refreshRemoteConfig = async () => {
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const now = Date.now();
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const server = getServer();
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const newConfig = await server.getConfig();
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// Process new configuration in light of the old configuration
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// The old configuration is not set as the initial value in reduce because
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// flags may have been deleted
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const oldConfig = config;
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config = newConfig.reduce((previous, { name, enabled }) => {
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const previouslyEnabled: boolean = get(oldConfig, [name, 'enabled'], false);
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// If a flag was previously not enabled and is now enabled, record the time it was enabled
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const enabledAt: number | undefined =
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previouslyEnabled && enabled ? now : get(oldConfig, [name, 'enabledAt']);
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const value = {
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name: name as ConfigKeyType,
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enabled,
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enabledAt,
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};
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// If enablement changes at all, notify listeners
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const currentListeners = listeners[name] || [];
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if (previouslyEnabled !== enabled) {
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currentListeners.forEach(listener => {
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listener(value);
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});
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}
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// Return new configuration object
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return {
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...previous,
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[name]: value,
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};
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}, {});
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window.storage.put('remoteConfig', config);
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};
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export const maybeRefreshRemoteConfig = throttle(
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refreshRemoteConfig,
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// Only fetch remote configuration if the last fetch was more than two hours ago
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2 * 60 * 60 * 1000,
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{ trailing: false }
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);
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export function isEnabled(name: ConfigKeyType): boolean {
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return get(config, [name, 'enabled'], false);
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}
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