server/index.ts
import { notificationMail, type MailArrival, type NotificationMail } from "../shared/notifications.js";
import { existsSync, readFileSync, writeFileSync, renameSync } from "node:fs";
import { isDeepStrictEqual } from "node:util";
import { EventEmitter } from "node:events";
import type { Server } from "node:http";
import { loadEnvFile } from "node:process";
import { randomBytes, randomUUID } from "node:crypto";
import path from "node:path";
import express from "express";
import { google } from "googleapis";
import { z } from "zod";
import { all, get, readMail, mailChanges, count, put, putBatch, remove, removeAccountAttachments, account, transaction, type StoredAccount } from "./store.js";
import { matchesRule } from "../shared/rules.js";
import { mountWorkspace } from "./workspace.js";
import { mountAgentProvider } from "./agent-provider.js";
import { mountDrafts } from "./drafts.js";
import { calendarScopes, removeGoogleCalendar, saveCalendarAccess } from "./google-calendar.js";
import { mountInvitations } from "./invitations.js";
import { mountOffers } from "./offers.js";
import { mountCalendar } from "./calendar.js";
import { oauth, providers, presets, validateImap, listGmailLabels, syncError } from "./providers.js";
import { ImapWatch, sameImapAccount, type ImapWatchFactory } from "./imap-watch.js";
import { GmailWatch } from "./gmail-watch.js";
import {
sendMail,
updateMessage,
messageActionSchema,
runMailWork,
findMail,
assertMailAvailable,
mailIsQuiesced,
trackMailWork,
quiesceMailWork,
resumeMailWork,
} from "./mail-actions.js";
import { mountMcp, authorizeMcp } from "./mcp.js";
import { classify, sortMail, SortingUnavailable } from "./sorting.js";
import { companyLogo } from "./avatars.js";
import { companySvg, isFreeMail, normalizeDomain, syncLogos } from "./logos.js";
import { jevProviderOf, type Provider, type Mail, type StateResponse, type SyncFailure } from "../shared/types.js";
import { emptyComposePreferences } from "../shared/mail-features.js";
const configPath = process.env.MAIL_CONFIG_PATH || ".env";
if (existsSync(configPath)) loadEnvFile(configPath);
const desktopEvents = new EventEmitter();
const app = express();
const appUrl = process.env.APP_URL || "http://127.0.0.1:5173";
const allowedOrigins = new Set([
new URL(appUrl).origin,
"http://127.0.0.1:3001",
...(process.env.MAIL_RENDERER_ORIGIN
? [process.env.MAIL_RENDERER_ORIGIN]
: []),
]);
const csrf = randomBytes(32).toString("hex");
let syncing = false;
let unreadArrivals = 0;
let mailArrivals: MailArrival[] = [];
let syncRun: Promise<string[]> | undefined;
let wakeSync: (() => void) | undefined;
let imapWatch: ImapWatch | undefined;
let gmailWatch: GmailWatch | undefined;
const pendingAccounts = new Set<string>();
const scheduledAccounts = new Set<string>();
const activeAccounts = new Set<string>();
const accountSyncStatus = (id: string) => activeAccounts.has(id) ? "running" as const : pendingAccounts.has(id) ? "queued" as const : undefined;
let scanningLogos = false;
const assertNotSyncing = () => {
assertMailAvailable();
if (syncing)
throw new Error("Wait for the current sync to finish, then try again.");
};
app.use("/mcp", authorizeMcp);
app.use(express.json({ limit: "2mb" }));
app.use("/mcp", (_req, res, next) => {
if (mailIsQuiesced())
return res.status(503).json({ error: "Mail is paused for an application update. Try again shortly." });
next();
});
const mailRequest = (handler: (req: express.Request, res: express.Response) => Promise<unknown>): express.RequestHandler =>
(req, res, next) => { void trackMailWork(() => handler(req, res)).catch(next); };
app.use("/api", (req, res, next) => {
res.set("Cache-Control", "no-store");
const host = req.hostname;
if (host !== "127.0.0.1" && host !== "localhost")
return res
.status(403)
.json({ error: "This app only accepts local requests." });
if (req.headers.origin && !allowedOrigins.has(req.headers.origin))
return res.status(403).json({ error: "Origin not allowed." });
if (
process.env.MAIL_DESKTOP_TOKEN &&
!req.path.startsWith("/oauth/google") &&
req.headers["x-desktop-token"] !== process.env.MAIL_DESKTOP_TOKEN
)
return res
.status(403)
.json({ error: "Open this inbox in Emc²." });
if (
!["GET", "HEAD"].includes(req.method) &&
req.headers["x-csrf-token"] !== csrf
)
return res.status(403).json({ error: "Reload the app and try again." });
if (mailIsQuiesced() && (req.path.startsWith("/oauth/") || !["GET", "HEAD"].includes(req.method)))
return res.status(503).json({ error: "Mail is paused for an application update. Try again shortly." });
if (
syncing &&
!["GET", "HEAD"].includes(req.method) &&
!/^\/accounts\/[^/]+\/drafts(?:\/[^/]+)?\/?$/.test(req.path) &&
!req.path.startsWith("/calendar/") &&
!req.path.startsWith("/send") &&
req.path !== "/mcp" &&
!(req.method === "PATCH" && /^\/accounts\/[^/]+$/.test(req.path)) &&
!(req.method === "PATCH" && /^\/messages\/[^/]+$/.test(req.path) && ["read", "pin", "unpin"].includes(req.body?.action)) &&
!(req.method === "POST" && (["/accounts/imap", "/sync"].includes(req.path) || /^\/accounts\/[^/]+\/reconnect$/.test(req.path)))
)
return res
.status(409)
.json({ error: "Wait for the current sync to finish, then try again." });
next();
});
mountDrafts(app, () => desktopEvents.emit("mail-changed"));
mountWorkspace(app);
mountCalendar(app);
mountOffers(app);
mountInvitations(app);
mountAgentProvider(app);
app.get("/api/state", async (req, res) => {
if (res.destroyed) return;
const controller = new AbortController();
const cancel = () => controller.abort();
res.once("close", cancel);
try {
let status!: Omit<StateResponse, "messages" | "mailCursor" | "mailMode" | "removedMailIds">;
const changes = await mailChanges(typeof req.query.mailCursor === "string" ? req.query.mailCursor : undefined, () => {
// Capture status at the same boundary as the encrypted mail view, before decoding yields.
mailArrivals = mailArrivals.filter((arrival) => !!get("mail", arrival.mail.id));
status = {
draftCount: count("draft"),
composePreferences: all("compose")[0] ?? emptyComposePreferences,
unreadArrivals,
mailArrivals,
csrf,
accounts: all("account").map(({ credentials: _credentials, ...a }) => ({ ...a, syncStatus: accountSyncStatus(a.id) })),
labels: all("label"),
rules: all("rule"),
googleConfigured: !!(
process.env.GOOGLE_CLIENT_ID && process.env.GOOGLE_CLIENT_SECRET
),
googleClientId: process.env.GOOGLE_CLIENT_ID || null,
jevConfigured: !!process.env.TYPESAFE_API_KEY,
jevProvider: jevProviderOf(process.env.TYPESAFE_PROVIDER),
aiConfigured: !!process.env.OPENAI_API_KEY,
lastSync: all("meta")[0]?.lastSync || null,
syncing,
};
}, controller.signal);
if (res.destroyed) return;
const { messages, ...mailStatus } = changes;
// Serialize bounded records so a large initial snapshot does not monopolize the main loop.
res.type("json");
res.write(JSON.stringify({ ...status, ...mailStatus }).slice(0, -1) + ',"messages":[');
for (let i = 0; i < messages.length; i++) {
if (res.destroyed) return;
const ready = res.write((i ? "," : "") + JSON.stringify(messages[i]));
if (!ready) await new Promise<void>((resolve) => { const done = () => { res.off("drain", done); res.off("close", done); resolve(); }; res.once("drain", done); res.once("close", done); });
if ((i + 1) % 32 === 0) await new Promise<void>(resolve => setImmediate(resolve));
}
if (!res.destroyed) res.end("]}");
} catch (error) {
if (!controller.signal.aborted) throw error;
} finally { res.off("close", cancel); }
});
app.get("/api/compose-preferences", (_req, res) => {
res.json(all("compose")[0] ?? emptyComposePreferences);
});
app.put("/api/compose-preferences", (req, res) => {
const input = z.object({
templates: z.array(z.object({
id: z.string().min(1).max(80),
name: z.string().trim().min(1).max(80),
subject: z.string().max(998).refine((value) => !/[\r\n]/.test(value)),
body: z.string().max(50000),
}).strict()).max(50),
signatures: z.record(z.string().min(1).max(200), z.string().max(10000)),
}).strict().parse(req.body);
if (new Set(input.templates.map((template) => template.id)).size !== input.templates.length)
return res.status(400).json({ error: "Template identifiers must be unique." });
const ids = new Set(all("account").map((a) => a.id));
if (Object.keys(input.signatures).some((id) => !ids.has(id)))
return res.status(400).json({ error: "Choose a connected account for each signature." });
put("compose", "preferences", input);
res.json(input);
});
app.post("/api/config", (req, res) => {
const value = z
.string()
.trim()
.max(2000)
.refine((v) => !/[\r\n]/.test(v), "Use a single-line credential");
const input = z
.object({
googleClientId: value.optional(),
googleClientSecret: value.optional(),
openaiApiKey: value.optional(),
jevApiKey: value.optional(),
jevProvider: z
.enum(["typesafe", "vercel", "openrouter"])
.optional(),
})
.parse(req.body);
const updates = {
GOOGLE_CLIENT_ID: input.googleClientId,
GOOGLE_CLIENT_SECRET: input.googleClientSecret,
OPENAI_API_KEY: input.openaiApiKey,
TYPESAFE_API_KEY: input.jevApiKey,
TYPESAFE_PROVIDER: input.jevProvider,
};
const entries = Object.entries(updates).filter(
(entry): entry is [string, string] => Boolean(entry[1]),
);
const previous = existsSync(configPath)
? readFileSync(configPath, "utf8").split("\n")
: [];
const names = new Set(entries.map(([name]) => name));
const settings = previous.filter(
(line) => !names.has(line.split("=")[0].trim()),
);
settings.push(
...entries.map(([name, setting]) => `${name}=${JSON.stringify(setting)}`),
);
writeFileSync(`${configPath}.tmp`, `${settings.join("\n")}\n`, {
mode: 0o600,
});
renameSync(`${configPath}.tmp`, configPath);
for (const [name, setting] of entries) process.env[name] = setting;
res.json({ ok: true });
});
app.get("/api/logo/:domain", async (req, res) => {
// theSVG first, then the favicon service: a brand the library knows gets a
// proper logo, and everything else keeps the mark its mail host publishes.
const image =
(await companySvg(req.params.domain)) ||
(await companyLogo(req.params.domain));
if (!image) {
// Cacheable so a row without a logo is not asked for on every render.
res.set("Cache-Control", "public, max-age=600");
return res.status(404).end();
}
res.set("Content-Type", image.type);
res.set("Cache-Control", "public, max-age=604800");
// Third-party vector bytes are served from this origin, so they are kept
// inert if the URL is ever opened as a document rather than as an image.
res.set("X-Content-Type-Options", "nosniff");
res.set("Content-Security-Policy", "default-src 'none'; style-src 'unsafe-inline'; sandbox");
return res.send(image.body);
});
app.post("/api/logos/sync", mailRequest(async (_req, res) => {
if (scanningLogos)
return res.status(409).json({ error: "A logo scan is already running." });
scanningLogos = true;
try {
const domains = new Set<string>();
for (const m of all("mail")) {
const domain = normalizeDomain(m.address);
if (domain && !isFreeMail(domain)) domains.add(domain);
}
res.json(await syncLogos([...domains]));
} finally {
scanningLogos = false;
}
}));
const oauthStates = new Map<string, { expiry: number; calendar: boolean; accountId?: string }>();
class AccountConnectionError extends Error {}
function existingAccount(email: string, provider: Provider) {
const matches = all("account").filter((a) => a.email.toLowerCase() === email.toLowerCase());
if (matches.some((a) => a.provider !== provider))
throw new AccountConnectionError("This email is already connected using another connection method. Keep that connection, or disconnect it before switching. Disconnecting removes its local mail cache.");
return matches[0];
}
app.get("/api/oauth/google", (req, res) => {
const calendar = req.query.calendar === "1";
const accountId = typeof req.query.accountId === "string" ? req.query.accountId : undefined;
const target = accountId ? get("account", accountId) : undefined;
if (accountId && (!target || target.provider !== "gmail")) return res.status(400).type("text").send("Choose a connected Gmail account.");
if (!process.env.GOOGLE_CLIENT_ID || !process.env.GOOGLE_CLIENT_SECRET) {
if (process.env.MAIL_DESKTOP_TOKEN)
return res
.type("text")
.send(
"Save your Google client ID and secret in Emc² Settings, then try again.",
);
return res.redirect(
`${appUrl}/?error=${encodeURIComponent("Set GOOGLE_CLIENT_ID and GOOGLE_CLIENT_SECRET in .env and restart the server.")}`,
);
}
const state = randomBytes(32).toString("hex");
for (const [s, value] of oauthStates)
if (value.expiry < Date.now()) oauthStates.delete(s);
oauthStates.set(state, { expiry: Date.now() + 600000, calendar, accountId });
res.cookie("oauth_state", state, {
httpOnly: true,
sameSite: "lax",
maxAge: 600000,
path: "/api/oauth/google/callback",
});
res.redirect(
oauth().generateAuthUrl({
access_type: "offline",
prompt: "consent",
state,
include_granted_scopes: true,
login_hint: target?.email,
scope: ["https://www.googleapis.com/auth/gmail.modify", ...(calendar ? calendarScopes : [])],
}),
);
});
app.get("/api/oauth/google/callback", mailRequest(async (req, res) => {
const state = typeof req.query.state === "string" ? req.query.state : "";
const cookie = req.headers.cookie
?.split(";")
.map((x) => x.trim())
.find((x) => x.startsWith("oauth_state="))
?.slice(12);
const consent = oauthStates.get(state);
oauthStates.delete(state);
res.clearCookie("oauth_state", { path: "/api/oauth/google/callback" });
if (!consent || consent.expiry < Date.now() || state !== cookie)
return res
.status(400)
.send("Invalid or expired sign-in. Return to the app and try again.");
let safeError = "Google connection failed. Reconnect and try again.";
const refuse = (message: string): never => { safeError = message; throw new Error(message); };
try {
if (req.query.error) refuse("Google sign-in was cancelled.");
const code = z.string().parse(req.query.code);
const auth = oauth();
const { tokens } = await auth.getToken(code);
auth.setCredentials(tokens);
const { data } = await google
.gmail({ version: "v1", auth })
.users.getProfile({ userId: "me" });
const email = z.email().parse(data.emailAddress);
const target = consent.accountId ? get("account", consent.accountId) : undefined;
if (consent.accountId && (!target || target.email.toLowerCase() !== email.toLowerCase())) refuse("Sign in with the Gmail account you chose in Emc².");
const old = existingAccount(email, "gmail");
const refreshToken = tokens.refresh_token || old?.credentials.refreshToken;
if (!refreshToken)
refuse("Google did not return offline access. Reconnect and grant consent.");
const id = old?.id || randomUUID();
put("account", id, {
...old,
id,
email,
provider: "gmail",
credentials: { refreshToken },
});
saveCalendarAccess(id, tokens.scope, consent.calendar);
if (!mailIsQuiesced()) gmailWatch?.reconcile(all("account"));
void requestSync([id], true);
if (process.env.MAIL_DESKTOP_TOKEN) {
desktopEvents.emit("oauth", null);
res
.type("text")
.send(
"Account connected. You can close this tab and return to Emc².",
);
} else res.redirect(`${appUrl}/?connected=1`);
} catch (error) {
if (error instanceof AccountConnectionError) safeError = error.message;
if (process.env.MAIL_DESKTOP_TOKEN) {
const message = safeError;
desktopEvents.emit("oauth", message);
res
.status(400)
.type("text")
.send(`${message} Return to Emc² to try again.`);
return;
}
res.redirect(
`${appUrl}/?error=${encodeURIComponent(safeError)}`,
);
}
}));
const imapSchema = z.object({
provider: z.enum(["gmail-imap", "icloud", "fastmail", "yahoo", "imap"]),
email: z.email(),
password: z.string().min(1).max(1000),
username: z.string().max(320).optional(),
imapHost: z
.string()
.regex(/^[a-zA-Z0-9.-]+$/)
.max(253)
.optional(),
smtpHost: z
.string()
.regex(/^[a-zA-Z0-9.-]+$/)
.max(253)
.optional(),
imapPort: z.number().int().min(1).max(65535).default(993),
smtpPort: z.union([z.literal(465), z.literal(587)]).default(465),
});
app.post("/api/accounts/imap", mailRequest(async (req, res) => {
const input = imapSchema.parse(req.body);
if (input.provider === "gmail-imap") {
input.password = input.password.replace(/ /g, "");
if (!/^[a-z]{16}$/.test(input.password))
throw new Error("Enter the 16-letter Google app password. Do not use your regular Google password.");
}
const old = existingAccount(input.email, input.provider);
const id = old?.id || randomUUID();
const credentials = {
...input,
...(input.provider === "imap" ? {} : presets[input.provider]),
username: input.provider === "imap" ? input.username : input.email,
};
if (!credentials.imapHost || !credentials.smtpHost)
throw new Error("Enter both IMAP and SMTP server names.");
const a: StoredAccount = {
id,
email: input.email,
provider: input.provider,
credentials,
};
await validateImap(a);
// Validation awaits the network; another connection can finish meanwhile.
const current = existingAccount(input.email, input.provider);
a.id = current?.id || id;
put("account", a.id, { ...current, ...a });
if (!mailIsQuiesced()) imapWatch?.reconcile(all("account"));
void requestSync([a.id], true);
res.json({ ok: true });
}));
app.patch("/api/accounts/:id", (req, res) => {
const { name } = z.object({
name: z.string()
.refine((value) => !/[\p{Cc}\p{Cf}\p{Zl}\p{Zp}]/u.test(value), "Use a single-line name without control characters.")
.trim().max(80),
}).strict().parse(req.body);
const current = all("account").find((a) => a.id === req.params.id);
if (!current) return res.status(404).json({ error: "Account not found." });
put("account", current.id, { ...current, name: name || undefined });
res.json({ ok: true });
});
app.post("/api/accounts/:id/reconnect", (req, res) => {
const a = all("account").find((a) => a.id === req.params.id);
if (!a) return res.status(404).json({ error: "Account not found." });
if (req.body !== undefined && (!req.body || typeof req.body !== "object" || Array.isArray(req.body) || Object.keys(req.body).length))
return res.status(400).json({ error: "Retry uses the saved account credentials. Do not include account data." });
// A completed account can retry while peers run; active/pending clicks still share work.
if (!activeAccounts.has(a.id) && !pendingAccounts.has(a.id)) scheduledAccounts.delete(a.id);
void requestSync([a.id]);
res.status(202).json({ status: accountSyncStatus(a.id), error: a.error, syncFailure: a.syncFailure });
});
app.delete("/api/accounts/:id", (req, res) => {
transaction(() => {
account(req.params.id);
remove("account", req.params.id);
const preferences = all("compose")[0];
if (preferences && Object.hasOwn(preferences.signatures, req.params.id)) {
const signatures = { ...preferences.signatures };
delete signatures[req.params.id];
put("compose", "preferences", { ...preferences, signatures });
}
for (const draft of all("draft").filter((draft) => draft.accountId === req.params.id))
remove("draft", draft.id);
removeAccountAttachments(req.params.id);
remove("coverage", req.params.id);
removeGoogleCalendar(req.params.id);
for (const offer of all("calendarOffer")) if (offer.accountId === req.params.id) remove("calendarOffer", offer.id);
for (const operation of all("calendarOperation")) if (operation.accountId === req.params.id) remove("calendarOperation", operation.id);
for (const rule of all("rule").filter((rule) => rule.accountId === req.params.id)) remove("rule", rule.id);
for (const proposal of all("proposal").filter((proposal) => proposal.accountId === req.params.id)) remove("proposal", proposal.id);
for (const grant of all("agent").filter((grant) => grant.accountIds.includes(req.params.id)))
put("agent", grant.id, { ...grant, accountIds: grant.accountIds.filter((id) => id !== req.params.id) });
for (const m of all("mail").filter((m) => m.accountId === req.params.id))
remove("mail", m.id);
for (const label of all("label").filter((label) => label.accountId === req.params.id))
remove("label", `${label.accountId}:${label.id}`);
});
imapWatch?.reconcile(all("account"));
gmailWatch?.reconcile(all("account"));
res.json({ ok: true });
});
app.post("/api/sync", async (_req, res) => {
res.json(await syncMail());
});
// The desktop process starts its own run while the window is hidden, so a
// background sync reports the same errors a request would.
export async function syncMail(): Promise<{ errors: string[] }> {
assertMailAvailable();
imapWatch?.reconcile(all("account"));
gmailWatch?.reconcile(all("account"));
return { errors: await requestSync(all("account").map((a) => a.id)) };
}
function requestSync(ids: string[], reconnect = false): Promise<string[]> {
if (mailIsQuiesced()) return Promise.resolve([]);
for (const id of ids) {
if (reconnect || !scheduledAccounts.has(id)) pendingAccounts.add(id);
scheduledAccounts.add(id);
}
if (syncRun) {
wakeSync?.();
return syncRun;
}
syncing = true;
const newUnread: NotificationMail[] = [];
syncRun = runMailWork(async () => {
const errors: string[] = [];
const active = new Map<string, Promise<void>>();
try {
while (pendingAccounts.size || active.size) {
for (const id of pendingAccounts) {
if (active.size >= 2) break;
if (active.has(id)) continue;
pendingAccounts.delete(id);
const a = all("account").find((a) => a.id === id);
if (!a) continue;
activeAccounts.add(id);
active.set(id, syncAccount(a, errors, (messages) => { newUnread.push(...messages); })
.catch((error) => {
const failure = syncError(error, a.provider, "sync");
const message = `${a.email}: ${failure.message}`;
errors.push(message);
const current = all("account").find((current) => current.id === a.id);
if (current && isDeepStrictEqual(current.credentials, a.credentials))
put("account", a.id, { ...current, error: message, syncFailure: failure.failure });
})
.finally(() => { active.delete(id); activeAccounts.delete(id); if (active.size || pendingAccounts.size) desktopEvents.emit("mail-changed"); }));
}
if (active.size) {
// Wake for a new account too; keep every active run until it settles.
await Promise.race([...active.values(), new Promise<void>((resolve) => { wakeSync = resolve; })]);
wakeSync = undefined;
}
}
put("meta", "sync", { lastSync: Date.now() });
return errors;
} finally {
syncing = false;
syncRun = undefined;
scheduledAccounts.clear();
for (const mail of newUnread) mailArrivals.push({ sequence: ++unreadArrivals, mail });
desktopEvents.emit("mail-changed");
if (newUnread.length) desktopEvents.emit("new-mail", newUnread.length, newUnread);
}
});
return syncRun;
}
async function syncAccount(
a: StoredAccount,
errors: string[],
onNewUnread: (messages: NotificationMail[]) => void,
) {
const currentAccount = () => all("account").find((current) => sameImapAccount(current, a));
const existing = new Map(
(await readMail(a.id)).filter((m) => m.direction !== "sent").map((m) => [m.id, m]),
);
if (!currentAccount()) return;
const hasSynced = a.hasSynced ?? existing.size > 0;
const rules = all("rule");
const fresh = new Map<string, Mail>();
const received = new Set<string>();
const saveBatch: NonNullable<Parameters<typeof providers.gmail.list>[2]> = (batch) => {
if (!currentAccount()) return;
const changed: [string, Mail][] = [];
for (const m of batch) {
if (received.has(m.id)) continue;
received.add(m.id);
const previous = existing.get(m.id);
const saved = {
...m,
...(previous
? { category: previous.category, relevance: previous.relevance, reason: previous.reason }
: sortMail(m, rules)),
archived: false,
snoozedUntil: previous?.snoozedUntil || null,
...(previous?.pinned ? { pinned: true } : {}),
};
if (!isDeepStrictEqual(previous, saved)) changed.push([m.id, saved]);
}
putBatch("mail", changed);
for (const [id, saved] of changed) if (!existing.has(id)) fresh.set(id, saved);
if (changed.length) desktopEvents.emit("mail-changed");
};
let error: string | undefined;
let syncFailure: SyncFailure | undefined;
let syncWarning: SyncFailure | undefined;
try {
const labels = a.provider === "gmail" ? await listGmailLabels(a) : undefined;
if (!currentAccount()) return;
if (labels) {
putBatch("label", labels.map((label) => [`${a.id}:${label.id}`, label]));
for (const old of all("label").filter((label) => label.accountId === a.id && !labels.some((current) => current.id === label.id)))
remove("label", `${a.id}:${old.id}`);
}
const incoming = await providers[a.provider].list(a, existing, saveBatch, (warning) => { syncWarning = warning; }, labels);
if (!currentAccount()) return;
// Also support a provider returning its final batch without a progress callback.
saveBatch(incoming);
const ids = new Set(incoming.map((m) => m.id));
const archived: [string, Mail][] = [...existing.values()]
.filter((m) => !m.archived && !ids.has(m.id)).map((m) => [m.id, { ...m, archived: true, labelIds: m.labelIds?.filter((id) => id !== "INBOX") }]);
putBatch("mail", archived);
if (archived.length) desktopEvents.emit("mail-changed");
} catch (failure) {
const safe = syncError(failure, a.provider, "sync");
error = `${a.email}: ${safe.message}`;
syncFailure = safe.failure;
errors.push(error);
}
if (fresh.size && (process.env.TYPESAFE_API_KEY || process.env.OPENAI_API_KEY)) {
const messages = [...fresh.values()];
let cursor = 0;
let stopped = false;
await Promise.all(Array.from({ length: Math.min(6, messages.length) }, async () => {
while (cursor < messages.length && !stopped && currentAccount()) {
const m = messages[cursor++];
try {
const sorting = await classify(m, rules);
if (currentAccount()) put("mail", m.id, { ...m, ...sorting });
} catch (sortingFailure) {
if (stopped) return;
stopped = true;
const warning = sortingFailure instanceof SortingUnavailable
? sortingFailure.message
: "AI sorting unavailable. Mail was synced using local sorting.";
errors.push(warning);
if (!error) error = warning;
}
}
}));
}
// A first import fills an empty cache, so only a later sync reports arrivals.
if (!error && currentAccount()) {
const arrived = [...fresh.values()].filter((m) => m.unread).map(notificationMail);
if (arrived.length && hasSynced) onNewUnread(arrived);
}
const current = currentAccount();
// A reconnect owns its new credentials and status, even if the old run finishes later.
if (current && isDeepStrictEqual(current.credentials, a.credentials))
put("account", a.id, {
...current,
hasSynced: error ? current.hasSynced ?? hasSynced : true,
error,
syncFailure,
syncWarning,
});
}
app.post("/api/messages/:id/images", mailRequest(async (req, res) => {
const mail = findMail(z.string().parse(req.params.id));
if (mail.images !== undefined) return res.json({ images: mail.images });
const a = account(mail.accountId);
const images = await providers[a.provider].images(a, mail);
// Read current state again so an overlapping mail action is not overwritten.
assertNotSyncing();
const current = findMail(mail.id);
put("mail", mail.id, { ...current, images });
res.json({ images });
}));
app.post("/api/messages/:id/content", mailRequest(async (req, res) => {
const mail = findMail(z.string().parse(req.params.id));
if (mail.html !== undefined && mail.attachments !== undefined) return res.json({ html: mail.html, images: mail.images, attachments: mail.attachments });
const a = account(mail.accountId);
const content = await providers[a.provider].content(a, mail);
assertNotSyncing();
const current = findMail(mail.id);
if (current.accountId !== mail.accountId || current.remoteId !== mail.remoteId || current.messageId !== mail.messageId)
throw new Error("Email identity changed. Content was not cached.");
// Preserve image recovery and mail actions completed during the source fetch.
const updated = { ...current, html: current.html === undefined ? content.html : current.html,
invitation: current.invitation ?? content.invitation,
images: current.images ?? content.images, attachments: current.attachments ?? content.attachments ?? [] };
put("mail", mail.id, updated);
res.json({ html: updated.html, images: updated.images, attachments: updated.attachments });
}));
app.patch("/api/messages/:id", async (req, res) => {
const input = messageActionSchema.parse(req.body);
if (!get("mail", req.params.id))
return res.status(404).json({ error: "Message not found." });
await updateMessage(req.params.id, input);
res.json({ ok: true });
});
app.post("/api/send", async (req, res) => {
res.json(await sendMail(req.body));
});
app.delete("/api/rules/:id", (req, res) => {
const removed = all("rule").find((rule) => rule.id === req.params.id);
remove("rule", req.params.id);
const rules = all("rule");
for (const m of all("mail"))
if (removed && matchesRule(m, removed)) put("mail", m.id, { ...m, ...sortMail(m, rules) });
res.json({ ok: true });
});
mountMcp(app, assertNotSyncing, () => desktopEvents.emit("mail-changed"));
const staticPath = process.env.MAIL_STATIC_DIR || path.resolve("dist");
app.use((_req, res, next) => {
res.set(
"Content-Security-Policy",
"default-src 'self'; script-src 'self'; style-src 'self'; img-src 'self' data: https:; connect-src 'self'; object-src 'none'; media-src data:; base-uri 'none'; frame-ancestors 'none'",
);
next();
});
app.use(express.static(staticPath));
app.get("/{*path}", (_req, res) =>
res.sendFile(path.join(staticPath, "index.html")),
);
app.use(
(
error: unknown,
_req: express.Request,
res: express.Response,
_next: express.NextFunction,
) => {
const message =
error instanceof z.ZodError
? error.issues.map((x) => x.message).join("; ")
: error instanceof Error
? error.message
: "Request failed.";
res.status(400).json({ error: message });
},
);
export function startServer(
port: number,
onAccountConnected?: (error: string | null) => void,
onMailChanged?: () => void,
onNewMail?: (count: number, messages: NotificationMail[]) => void,
watchClient?: ImapWatchFactory,
gmailRevision?: (account: StoredAccount) => Promise<string>,
): Promise<Server> {
if (onAccountConnected) desktopEvents.on("oauth", onAccountConnected);
if (onMailChanged) desktopEvents.on("mail-changed", onMailChanged);
if (onNewMail) desktopEvents.on("new-mail", onNewMail);
return new Promise((resolve, reject) => {
const server = app.listen(port, "127.0.0.1", () => {
imapWatch = new ImapWatch((a) => {
if (all("account").some((current) => sameImapAccount(current, a)))
void requestSync([a.id], true);
}, watchClient);
imapWatch.reconcile(all("account"));
gmailWatch = new GmailWatch(async (a) => {
if (mailIsQuiesced() || !all("account").some((current) => sameImapAccount(current, a))) return false;
await requestSync([a.id], true);
const current = all("account").find((current) => sameImapAccount(current, a));
return !!current && !current.error;
}, gmailRevision);
gmailWatch.reconcile(all("account"));
resolve(server);
});
server.once("error", reject);
// A restarted server, such as the macOS keychain relaunch, must not leave
// the previous window's listeners subscribed.
server.once("close", () => {
imapWatch?.close();
imapWatch = undefined;
gmailWatch?.close();
gmailWatch = undefined;
if (onAccountConnected) desktopEvents.off("oauth", onAccountConnected);
if (onMailChanged) desktopEvents.off("mail-changed", onMailChanged);
if (onNewMail) desktopEvents.off("new-mail", onNewMail);
});
});
}
export async function quiesceMail(timeout: number) {
// Block admission before closing watchers, including already queued sync and MCP sends.
const drained = quiesceMailWork(timeout);
imapWatch?.close();
gmailWatch?.close();
await drained;
}
export function resumeMail() {
resumeMailWork();
imapWatch?.reconcile(all("account"));
gmailWatch?.reconcile(all("account"));
}
if (!process.env.MAIL_DESKTOP_TOKEN)
void startServer(3001)
.then(() => console.log("Mail server listening at http://127.0.0.1:3001"))
.catch((error) => {
console.error(error.message);
process.exit(1);
});