mirror of
https://github.com/bulwarkmail/webmail.git
synced 2026-11-02 16:15:39 +00:00
Linus Rath
4b60fcc1e6
The review of offline mode found ways to send a message twice, to lose unsent mail without a word, and to send mail without its signing, encryption or check plugin. This fixes them and the smaller findings: - each outbox message is taken for sending in one database transaction under a Web Lock per account; only a failure before the submission request (SendNotStartedError from the client) puts it back, any other one marks it "may have gone out"; read-backs after the submission no longer fail a send; a send of a closed tab turns uncertain after a minute - every sign-out the user didn't confirm names the deleted messages on the sign-in page, or in a toast when another account stays signed in - nothing is queued while an enabled plugin isn't running (after a start without the network none can); the composer says why - the outbox waits for a fresh policy and holds messages the rules have since made stricter (a required label, a required send check) - another tab switching offline mode off sticks: only switching it on may create the database - only attachments of kept messages are kept, filed with their message, deleted with it and under the cap between syncs; file names and types are sealed; folders that went away leave the scope, and a folder that couldn't be asked keeps its mail without holding the others back - a group scope that forbids offline mode waits until the account's groups are known; one server down no longer holds another's mail - an offline start only when the server is really unreachable, and the real sign-in follows by itself once it answers - the service worker files pages and chunks under the build that served them, and the shell list of another build isn't kept under this one - a raw send counts as the composer's only from the plugin running its takeover, for that identity - errors and refusals are in all languages; the banner tells "offline" from "server can't be reached"; outbox buttons name their message; changes and messages go in the order they were made
102 lines
3.3 KiB
TypeScript
102 lines
3.3 KiB
TypeScript
/**
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* What offline mode (#523) shows: which accounts keep mail on this device,
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* whether the browser is offline, what waits in the outbox, how much the
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* cache uses. The switch itself ("Keep mail on this device") is per account
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* and per browser, in localStorage, never synced: it is off until the user
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* turns it on here.
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*/
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import { create } from 'zustand';
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import type { OutboxEntry, OutboxError } from './queue';
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/** localStorage: the local account ids that keep mail on this device. */
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export const OFFLINE_ACCOUNTS_KEY = 'bulwark-offline-accounts';
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export interface OutboxRow {
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id: number;
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account: string;
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createdAt: number;
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subject: string;
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to: string[];
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status: OutboxEntry['status'];
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error?: OutboxError;
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}
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interface OfflineState {
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/** Accounts with "Keep mail on this device" on. */
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enabled: string[];
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/** The browser says it has no network. */
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browserOffline: boolean;
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/** Mail servers (their URLs) that couldn't be reached at the last request. */
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downServers: string[];
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/** The app started without the server, from the mail on this device. */
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startedOffline: boolean;
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outbox: OutboxRow[];
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pendingChanges: number;
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usageBytes: number;
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/** Accounts whose mail is being brought onto the device right now. */
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syncing: string[];
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lastSyncedAt: Record<string, number>;
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}
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function readEnabled(): string[] {
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try {
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const raw = typeof localStorage === 'undefined' ? null : localStorage.getItem(OFFLINE_ACCOUNTS_KEY);
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const parsed = raw ? JSON.parse(raw) : [];
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return Array.isArray(parsed) ? parsed.filter((id): id is string => typeof id === 'string') : [];
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} catch {
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return [];
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}
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}
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export const useOfflineStore = create<OfflineState>()(() => ({
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enabled: readEnabled(),
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browserOffline: typeof navigator !== 'undefined' && navigator.onLine === false,
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downServers: [],
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startedOffline: false,
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outbox: [],
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pendingChanges: 0,
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usageBytes: 0,
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syncing: [],
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lastSyncedAt: {},
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}));
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export function writeEnabled(enabled: string[]): void {
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useOfflineStore.setState({ enabled });
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try {
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if (enabled.length) localStorage.setItem(OFFLINE_ACCOUNTS_KEY, JSON.stringify(enabled));
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else localStorage.removeItem(OFFLINE_ACCOUNTS_KEY);
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} catch {
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/* storage unavailable */
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}
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}
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export function serverKey(url: string): string {
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return url.replace(/\/+$/, '').toLowerCase();
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}
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/** The browser is offline, or this mail server (any, without one) couldn't be reached. */
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export function isOfflineNow(serverUrl?: string): boolean {
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const { browserOffline, downServers } = useOfflineStore.getState();
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if (browserOffline) return true;
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return serverUrl ? downServers.includes(serverKey(serverUrl)) : downServers.length > 0;
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}
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export function setServerDown(serverUrl: string, down: boolean): boolean {
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const key = serverKey(serverUrl);
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const { downServers } = useOfflineStore.getState();
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const was = downServers.includes(key);
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if (was !== down) useOfflineStore.setState({ downServers: down ? [...downServers, key] : downServers.filter((s) => s !== key) });
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return was;
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}
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/** The switch as another tab left it (it changed in localStorage there). */
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export function readEnabledFrom(raw: string | null): string[] {
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try {
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const parsed = raw ? JSON.parse(raw) : [];
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return Array.isArray(parsed) ? parsed.filter((id): id is string => typeof id === 'string') : [];
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} catch {
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return [];
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}
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}
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