| 1 | // sandbox.js — the HOST side of member-built apps (docs/member-apps.md). |
| 2 | // |
| 3 | // A member app is user content, not admin-vetted code, so the page never runs |
| 4 | // it. Instead each member app registers a PROXY through the ordinary mini-app |
| 5 | // framework — so it appears in New chat's Apps list, gets a personal thread, |
| 6 | // folds events, and snapshots like any app — while the untrusted code itself |
| 7 | // runs only inside an opaque-origin <iframe sandbox="allow-scripts"> pointed |
| 8 | // at /app-sandbox (no cookies, no storage, no parent DOM, no network; see |
| 9 | // memberapps.go for the frame's CSP). |
| 10 | // |
| 11 | // The proxy's fold is a trusted, generic queue: every wire event of the app's |
| 12 | // types appends to `pend`. The frame folds those events with the app's real |
| 13 | // (untrusted) reducer and reports folded state back; the host then swaps the |
| 14 | // report in as `v` and trims `pend` (installMemberAppState in apps.js). At |
| 15 | // every moment `v + pend` IS the fold at the thread's snapshot horizon, so |
| 16 | // the framework's snapshot machinery persists sandboxed state unchanged. |
| 17 | // |
| 18 | // Trust rules enforced here, on every message out of a frame: |
| 19 | // - an app may only emit/schedule events of its OWN manifest types (all |
| 20 | // prefixed "<name>." — it can't spoof chat.*, another app, or a bare |
| 21 | // text message); |
| 22 | // - events are deep-sanitized: plain JSON data only, no __proto__ keys, no |
| 23 | // injected name/ts/uid, notices clamped to plain strings with no action |
| 24 | // chips, hard size caps, a rate limit; |
| 25 | // - state reports are size-capped and JSON-normalized. |
| 26 | // Nothing else crosses: no keys, no tokens, no other threads' data, no DOM. |
| 27 | |
| 28 | import { defineApp, appByName, isAppType, commandTakenBy, installMemberAppState, memberCtx, foldHostEvent } from "./apps.js"; |
| 29 | import { decrypt, encrypt } from "./crypto.js"; |
| 30 | |
| 31 | // Injected by shell.js: seed a member app's snapshot state before an off-thread |
| 32 | // command runs its (transient) logic frame, and re-render the active surfaces |
| 33 | // after companion chat projections fold in. Both no-ops until set. |
| 34 | let memberSeeder = null; |
| 35 | export function setMemberSeeder(fn) { |
| 36 | memberSeeder = fn; |
| 37 | } |
| 38 | let surfaceRefresh = null; |
| 39 | export function setSurfaceRefresh(fn) { |
| 40 | surfaceRefresh = fn; |
| 41 | } |
| 42 | |
| 43 | // Injected by shell.js: the privileged context App Studio needs to list / |
| 44 | // deploy / retire member apps — an accessor returning |
| 45 | // { token, instanceKey, uid, name, openApp(name) }. An accessor (not a value) |
| 46 | // because the instance key arrives after boot. No-op until set. |
| 47 | let memberAdmin = null; |
| 48 | export function setMemberAdmin(fn) { |
| 49 | memberAdmin = fn; |
| 50 | } |
| 51 | |
| 52 | // How many queued-but-unfolded events a proxy retains while no frame is alive |
| 53 | // to fold them (the frame drains the queue whenever the app is open). Beyond |
| 54 | // the cap the oldest are dropped and the state flagged, so a pathological |
| 55 | // backlog degrades visibly instead of growing without bound. |
| 56 | const MAX_PEND = 500; |
| 57 | |
| 58 | // Caps on what a frame may hand us (the server's blob cap is 64 KB and the |
| 59 | // thread-state cap 256 KB — stay comfortably inside both). |
| 60 | const MAX_EVENT_JSON = 32 * 1024; |
| 61 | // The whole proxy snapshot (state + pend + projected chat) is encrypted then |
| 62 | // base64'd (~1.37×) into one thread_state blob capped at 256 KB server-side, and |
| 63 | // several apps may share that slot — so keep the plaintext budget well under it. |
| 64 | const MAX_STATE_JSON = 150 * 1024; |
| 65 | const EMIT_BURST = 30; // emits allowed per window… |
| 66 | const EMIT_WINDOW_MS = 10_000; // …per this window |
| 67 | |
| 68 | // The theme custom properties forwarded into frames — the same table |
| 69 | // docs/building-member-apps.md promises authors. |
| 70 | const THEME_VARS = [ |
| 71 | "--bg", "--panel", "--sidebar", "--ink", "--muted", "--border", |
| 72 | "--accent", "--accent-ink", "--link", "--bubble-me", "--bubble-me-ink", |
| 73 | "--bubble-them", "--danger", "--warn", "--radius", "--shadow", |
| 74 | "--font-display", "--ui-cursor", |
| 75 | ]; |
| 76 | |
| 77 | // ---- manifest + event validation (pure; unit-tested in Node) -------------- |
| 78 | |
| 79 | const NAME_RE = /^[a-z][a-z0-9-]{1,23}$/; |
| 80 | const TYPE_TAIL_RE = /^[a-z0-9_-]{1,40}(\.[a-z0-9_-]{1,40})*$/; |
| 81 | const CMD_RE = /^\/[a-z][a-z0-9-]{0,30}$/; |
| 82 | |
| 83 | // validateManifest checks a decrypted member-app manifest and returns an |
| 84 | // error string, or null when it's sound. The manifest is untrusted (any |
| 85 | // member can deploy a blob), so nothing here is advisory: the proxy registers |
| 86 | // exactly and only what validates. |
| 87 | export function validateManifest(m) { |
| 88 | if (!m || typeof m !== "object") return "manifest missing"; |
| 89 | if (m.v !== 1) return "unsupported manifest version"; |
| 90 | if (typeof m.name !== "string" || !NAME_RE.test(m.name)) return "bad app name"; |
| 91 | if (typeof m.title !== "string" || !m.title.trim() || m.title.length > 40) return "bad title"; |
| 92 | if (typeof m.glyph !== "string" || !m.glyph || m.glyph.length > 8) return "bad glyph"; |
| 93 | if (m.scope !== undefined && m.scope !== "personal") return "only personal member apps are supported"; |
| 94 | if (!Array.isArray(m.types) || m.types.length < 1 || m.types.length > 64) return "bad types list"; |
| 95 | for (const t of m.types) { |
| 96 | if (typeof t !== "string" || !t.startsWith(m.name + ".")) return `event type "${t}" must be prefixed "${m.name}."`; |
| 97 | if (!TYPE_TAIL_RE.test(t.slice(m.name.length + 1))) return `bad event type "${t}"`; |
| 98 | } |
| 99 | // Optional command METADATA (names + typeahead text); the handlers live in |
| 100 | // the app source and run in the frame. Only the shapes are checked here. |
| 101 | if (m.commands !== undefined) { |
| 102 | if (!Array.isArray(m.commands) || m.commands.length > 16) return "bad commands list"; |
| 103 | for (const c of m.commands) { |
| 104 | if (!c || typeof c !== "object") return "bad command"; |
| 105 | if (typeof c.name !== "string" || !CMD_RE.test(c.name)) return `bad command name "${c && c.name}"`; |
| 106 | if (c.desc !== undefined && (typeof c.desc !== "string" || c.desc.length > 80)) return "bad command desc"; |
| 107 | if (c.args !== undefined && (typeof c.args !== "string" || c.args.length > 40)) return "bad command args"; |
| 108 | } |
| 109 | } |
| 110 | // Optional native chrome (docs/icons.md): an SF Symbols name — dotted |
| 111 | // lowercase words, bounded. The emoji glyph stays the identity; a name |
| 112 | // native can't resolve falls back to it. `mark` is deliberately NOT a |
| 113 | // member-app field (vendored brand assets — impersonation). |
| 114 | if (m.symbol !== undefined && (typeof m.symbol !== "string" || m.symbol.length > 60 || !/^[a-z0-9.]+$/.test(m.symbol))) return "bad symbol"; |
| 115 | // Optional companion opt-in: the app projects each event into a Chat view. |
| 116 | if (m.chat !== undefined && typeof m.chat !== "boolean") return "bad chat flag"; |
| 117 | // Optional group opt-in: the app may ALSO be added to a group chat, where |
| 118 | // one shared instance runs for everyone (same meaning as a built-in app's |
| 119 | // `groupCapable` — see apps.js). Orthogonal to `scope`, which stays |
| 120 | // "personal": the app still gets its own personal thread too. |
| 121 | if (m.groupCapable !== undefined && typeof m.groupCapable !== "boolean") return "bad groupCapable flag"; |
| 122 | // Optional space opt-in: the app may be installed FOR THE WHOLE SPACE — one |
| 123 | // shared instance in the hidden space thread, its commands available in |
| 124 | // every chat (same meaning as a built-in app's `spaceCapable` — see apps.js |
| 125 | // and docs/space-apps.md). |
| 126 | if (m.spaceCapable !== undefined && typeof m.spaceCapable !== "boolean") return "bad spaceCapable flag"; |
| 127 | // Optional places-first declaration (docs/space-apps.md): any NON-EMPTY |
| 128 | // subset of ["you","chat","space"] — a member app needs somewhere to live, |
| 129 | // but which places is the author's call: personal-only is the common shape, |
| 130 | // and a space-only app (one shared copy, gif-style) is just as legal. |
| 131 | // Overrides the boolean flags above. (Legacy manifests without places imply |
| 132 | // "you" — that generation was personal by definition.) |
| 133 | if (m.places !== undefined) { |
| 134 | if (!Array.isArray(m.places) || !m.places.every((x) => x === "you" || x === "chat" || x === "space")) return "bad places list"; |
| 135 | if (!m.places.length) return "places must name at least one place"; |
| 136 | } |
| 137 | // Optional listed:false — the implicitly-placed shape (the /gif model, |
| 138 | // docs/space-apps.md): the app stays out of the catalogues, and a |
| 139 | // space-only unlisted app's one copy is used on first command, no add |
| 140 | // gesture. Anything but a boolean is a malformed manifest. |
| 141 | if (m.listed !== undefined && typeof m.listed !== "boolean") return "bad listed flag"; |
| 142 | // Optional one-line reason a place is off ("why can't I add this here?"), |
| 143 | // shown muted in the Apps sheet on unsupported places. |
| 144 | if (m.placeNote !== undefined && (typeof m.placeNote !== "string" || m.placeNote.length > 120)) return "bad placeNote"; |
| 145 | // Optional quiet opt-in: a command answering in place must not force this |
| 146 | // app's personal thread into view (same meaning as a built-in app's `quiet` |
| 147 | // — see apps.js, issue #227). |
| 148 | if (m.quiet !== undefined && typeof m.quiet !== "boolean") return "bad quiet flag"; |
| 149 | // Optional defaultCommand: plain text in the Chat view runs it. Must name a |
| 150 | // command the app declares (so the host has a handler to route text to). |
| 151 | if (m.defaultCommand !== undefined) { |
| 152 | if (typeof m.defaultCommand !== "string" || !CMD_RE.test(m.defaultCommand)) return "bad defaultCommand"; |
| 153 | if (!(m.commands || []).some((c) => c.name === m.defaultCommand)) { |
| 154 | return `defaultCommand "${m.defaultCommand}" isn't one of the app's commands`; |
| 155 | } |
| 156 | } |
| 157 | return null; |
| 158 | } |
| 159 | |
| 160 | const BAD_KEYS = new Set(["__proto__", "constructor", "prototype"]); |
| 161 | |
| 162 | // cleanJSON deep-copies untrusted structured data into plain JSON values: |
| 163 | // objects/arrays/strings/finite numbers/booleans/null only, hostile keys |
| 164 | // rejected, depth-bounded. Returns undefined when the value can't be accepted. |
| 165 | export function cleanJSON(v, depth = 0) { |
| 166 | if (depth > 8) return undefined; |
| 167 | if (v === null) return null; |
| 168 | const t = typeof v; |
| 169 | if (t === "string") return v.length > 8192 ? undefined : v; |
| 170 | if (t === "number") return Number.isFinite(v) ? v : undefined; |
| 171 | if (t === "boolean") return v; |
| 172 | if (Array.isArray(v)) { |
| 173 | if (v.length > 1024) return undefined; |
| 174 | const out = []; |
| 175 | for (const it of v) { |
| 176 | const c = cleanJSON(it, depth + 1); |
| 177 | if (c === undefined) return undefined; |
| 178 | out.push(c); |
| 179 | } |
| 180 | return out; |
| 181 | } |
| 182 | if (t === "object") { |
| 183 | const out = {}; |
| 184 | for (const k of Object.keys(v)) { |
| 185 | if (BAD_KEYS.has(k) || k.length > 64) return undefined; |
| 186 | const c = cleanJSON(v[k], depth + 1); |
| 187 | if (c === undefined) return undefined; |
| 188 | out[k] = c; |
| 189 | } |
| 190 | return out; |
| 191 | } |
| 192 | return undefined; // functions, symbols, bigints, undefined |
| 193 | } |
| 194 | |
| 195 | // sanitizeAppEvent admits an event a frame wants on the wire: its own types |
| 196 | // only, clean JSON, no transport-injected fields, notice reduced to plain |
| 197 | // clamped strings (never action chips), and a total size cap. Returns the |
| 198 | // cleaned event or null. |
| 199 | export function sanitizeAppEvent(appName, ownedTypes, event) { |
| 200 | const e = cleanJSON(event); |
| 201 | if (!e || typeof e !== "object" || Array.isArray(e)) return null; |
| 202 | if (typeof e.type !== "string" || !e.type.startsWith(appName + ".")) return null; |
| 203 | if (ownedTypes && !ownedTypes.includes(e.type)) return null; |
| 204 | delete e.name; // the transport injects these; a frame must not choose them |
| 205 | delete e.ts; |
| 206 | delete e.uid; |
| 207 | if (e.notice !== undefined) { |
| 208 | const n = e.notice; |
| 209 | if (!n || typeof n !== "object" || Array.isArray(n)) return null; |
| 210 | e.notice = { |
| 211 | title: String(n.title || "").slice(0, 120), |
| 212 | body: String(n.body || "").slice(0, 400), |
| 213 | }; |
| 214 | } |
| 215 | try { |
| 216 | if (JSON.stringify(e).length > MAX_EVENT_JSON) return null; |
| 217 | } catch { |
| 218 | return null; |
| 219 | } |
| 220 | return e; |
| 221 | } |
| 222 | |
| 223 | // sanitizePanelSpec admits a command panel request from a frame (the |
| 224 | // declarative ctx.panel form — see sandbox-frame.js's header): clamped title, |
| 225 | // whitelisted position/animate, and `data` (the JSON handed to the app's |
| 226 | // panel hook) cleaned and size-capped. Returns the cleaned spec or null. |
| 227 | export function sanitizePanelSpec(spec) { |
| 228 | if (!spec || typeof spec !== "object" || Array.isArray(spec)) return null; |
| 229 | // Field-wise, not cleanJSON on the whole object: an app that leaves |
| 230 | // position/animate unset ships them as `undefined` properties, which |
| 231 | // cleanJSON (rightly) rejects wholesale — only `data` is arbitrary JSON. |
| 232 | const data = spec.data === undefined || spec.data === null ? null : cleanJSON(spec.data); |
| 233 | if (data === undefined) return null; |
| 234 | const out = { title: String(spec.title || "").slice(0, 80), data }; |
| 235 | if (spec.position === "top") out.position = "top"; |
| 236 | if (spec.animate === false) out.animate = false; |
| 237 | try { |
| 238 | if (JSON.stringify(data).length > 64 * 1024) return null; |
| 239 | } catch { |
| 240 | return null; |
| 241 | } |
| 242 | return out; |
| 243 | } |
| 244 | |
| 245 | // ---- the proxy app --------------------------------------------------------- |
| 246 | |
| 247 | // One shared stylesheet for every sandbox mount (injected once). |
| 248 | function injectSandboxStyles() { |
| 249 | if (typeof document === "undefined" || document.getElementById("sandbox-style")) return; |
| 250 | const st = document.createElement("style"); |
| 251 | st.id = "sandbox-style"; |
| 252 | st.textContent = ` |
| 253 | .sandbox-pane { display: flex; flex-direction: column; height: 100%; } |
| 254 | /* Sandboxed apps own their full surface edge-to-edge — drop the app-pane's |
| 255 | 16px inset (apps.js), which is meant for built-in apps rendering DOM |
| 256 | directly into the pane. The app adds its own padding inside the frame. |
| 257 | (render() puts .sandbox-pane on the pane element itself.) */ |
| 258 | .thread-view.app-mode .app-pane.sandbox-pane { padding: 0; gap: 0; } |
| 259 | .sandbox-note { padding: 8px 12px; font-size: 13px; color: var(--muted); border-bottom: 1px solid var(--border); } |
| 260 | .sandbox-note.err { color: var(--danger); } |
| 261 | .sandbox-frame { flex: 1 1 auto; width: 100%; border: 0; display: block; } |
| 262 | `; |
| 263 | document.head.appendChild(st); |
| 264 | } |
| 265 | |
| 266 | // Live mounts: iframe element → mount record. One global listener routes each |
| 267 | // frame's "ready" (sent on load AND on reload — a parked pane's iframe reloads |
| 268 | // when it re-enters the DOM) to its record and (re-)initialises the bridge. |
| 269 | const mounts = new Map(); |
| 270 | |
| 271 | // resolveDark turns a computed `color-scheme` value into a concrete dark/light |
| 272 | // decision for the frame. The app writes "light", "dark", or "light dark" (the |
| 273 | // last means "follow the OS" — colorScheme() in ui.js), so a plain |
| 274 | // .includes("dark") reads "light dark" as dark and forces every app dark even in |
| 275 | // light mode. Explicit wins; the ambiguous "light dark"/unset case follows the OS. |
| 276 | export function resolveDark(colorScheme, osPrefersDark) { |
| 277 | const s = (colorScheme || "").trim(); |
| 278 | const hasDark = /\bdark\b/.test(s); |
| 279 | const hasLight = /\blight\b/.test(s); |
| 280 | if (hasDark && !hasLight) return true; |
| 281 | if (hasLight && !hasDark) return false; |
| 282 | return !!osPrefersDark; |
| 283 | } |
| 284 | |
| 285 | function themeSnapshot() { |
| 286 | const cs = getComputedStyle(document.documentElement); |
| 287 | const vars = {}; |
| 288 | for (const k of THEME_VARS) { |
| 289 | const v = cs.getPropertyValue(k); |
| 290 | if (v) vars[k] = v.trim(); |
| 291 | } |
| 292 | return { |
| 293 | vars, |
| 294 | font: getComputedStyle(document.body).font || "", |
| 295 | dark: resolveDark(cs.colorScheme, matchMedia("(prefers-color-scheme: dark)").matches), |
| 296 | }; |
| 297 | } |
| 298 | |
| 299 | // pushTheme forwards the CURRENT theme to every live sandbox frame, so member |
| 300 | // apps re-tint the moment the member switches theme/appearance — the shell calls |
| 301 | // it from its own applyTheme. (Without this a frame keeps its init-time theme |
| 302 | // until it's re-mounted, e.g. by revisiting the thread.) |
| 303 | export function pushTheme() { |
| 304 | const msg = { type: "theme", ...themeSnapshot() }; |
| 305 | for (const rec of mounts.values()) { |
| 306 | if (rec.port) { |
| 307 | try { |
| 308 | rec.port.postMessage(msg); |
| 309 | } catch {} |
| 310 | } |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | function seedFrom(state) { |
| 315 | const s = state || {}; |
| 316 | return { v: s.v === undefined ? null : s.v, vUpTo: s.vUpTo || 0, pend: s.pend || [], chat: s.chat || [] }; |
| 317 | } |
| 318 | |
| 319 | // initMount is driven by the iframe's `load` event (see registerMemberApp), |
| 320 | // NOT by a postMessage from the frame. That distinction is load-bearing: a |
| 321 | // `load` event fires only on a genuine document (re)load and cannot be forged |
| 322 | // by the code running inside the frame, whereas a `postMessage` "ready" can — |
| 323 | // so a hostile app could otherwise spam a fake ready to make the host swap to |
| 324 | // a fresh port the live frame never adopts, freezing event delivery. By the |
| 325 | // time the parent's `load` fires, the frame's module script has already run |
| 326 | // and installed its init listener, so posting the port here always lands. |
| 327 | function initMount(rec) { |
| 328 | const chan = new MessageChannel(); |
| 329 | rec.port = chan.port1; |
| 330 | rec.sent = new Set(); |
| 331 | rec.emits = []; // rate-limit timestamps |
| 332 | rec.port.onmessage = (ev) => onFrameMessage(rec, ev); |
| 333 | const state = rec.ctx.getState(); |
| 334 | const seed = seedFrom(state); |
| 335 | for (const it of seed.pend) if (it && it.meta && it.meta.id != null) rec.sent.add(it.meta.id); |
| 336 | const init = { |
| 337 | type: "lchat-sandbox-init", |
| 338 | source: rec.app.memberApp.source, |
| 339 | manifest: rec.app.memberApp.manifest, |
| 340 | threadId: rec.ctx.threadId, |
| 341 | me: { uid: rec.ctx.me, name: rec.ctx.meName }, |
| 342 | theme: themeSnapshot(), |
| 343 | seed, |
| 344 | }; |
| 345 | // A panel frame boots straight into the app's panel hook (sandbox-frame.js). |
| 346 | if (rec.panelFrame) init.panel = { data: rec.panelData === undefined ? null : rec.panelData }; |
| 347 | rec.iframe.contentWindow.postMessage( |
| 348 | init, |
| 349 | // The frame's origin is opaque, so "*" is the only addressable target; |
| 350 | // the transferred port scopes the channel to exactly this frame. |
| 351 | "*", |
| 352 | [chan.port2], |
| 353 | ); |
| 354 | } |
| 355 | |
| 356 | function note(rec, text, isErr) { |
| 357 | let n = rec.el.querySelector(".sandbox-note"); |
| 358 | if (!text) { |
| 359 | if (n) n.remove(); |
| 360 | return; |
| 361 | } |
| 362 | if (!n) { |
| 363 | n = document.createElement("div"); |
| 364 | n.className = "sandbox-note"; |
| 365 | rec.el.prepend(n); |
| 366 | } |
| 367 | n.classList.toggle("err", !!isErr); |
| 368 | n.textContent = text; |
| 369 | } |
| 370 | |
| 371 | function onFrameMessage(rec, ev) { |
| 372 | const m = ev.data; |
| 373 | if (!m || typeof m !== "object") return; |
| 374 | const app = rec.app; |
| 375 | const ctx = rec.ctx; |
| 376 | switch (m.type) { |
| 377 | case "state": { |
| 378 | if (rec.panelFrame) return; // the app-thread's own frame owns state |
| 379 | const upTo = m.upTo; |
| 380 | if (typeof upTo !== "number" || !Number.isFinite(upTo) || upTo < 0) return; |
| 381 | const state = cleanJSON(m.state); |
| 382 | if (state === undefined) return; |
| 383 | const chat = app.memberApp.manifest.chat ? sanitizeChat(m.chat) : undefined; |
| 384 | try { |
| 385 | // Guard the WHOLE persisted object (state + projected chat), not just |
| 386 | // state: the snapshot carries both, and together they must fit the |
| 387 | // server's thread_state cap. |
| 388 | if (JSON.stringify(state).length + (chat ? JSON.stringify(chat).length : 0) > MAX_STATE_JSON) { |
| 389 | note(rec, "This app's state grew too large to save — recent changes may not persist.", true); |
| 390 | return; |
| 391 | } |
| 392 | } catch { |
| 393 | return; |
| 394 | } |
| 395 | installMemberAppState(ctx.threadId, app.name, state, upTo, chat); |
| 396 | if (chat && chat.length) foldCompanionChat(ctx.threadId, app, chat); |
| 397 | break; |
| 398 | } |
| 399 | case "command-reply": { |
| 400 | const w = rec.cmdWaiters && rec.cmdWaiters.get(m.seq); |
| 401 | if (w) { |
| 402 | rec.cmdWaiters.delete(m.seq); |
| 403 | w(m.spec && typeof m.spec === "object" ? m.spec : null); |
| 404 | } |
| 405 | break; |
| 406 | } |
| 407 | case "emit": |
| 408 | case "ephemeral": { |
| 409 | if (!allowSend(rec)) return; |
| 410 | const e = sanitizeAppEvent(app.name, app.memberApp.manifest.types, m.event); |
| 411 | if (!e) return; |
| 412 | if (m.type === "emit") ctx.emit(e); |
| 413 | else ctx.emitEphemeral(e); |
| 414 | break; |
| 415 | } |
| 416 | case "schedule": { |
| 417 | const seq = m.seq; |
| 418 | if (!allowSend(rec)) { |
| 419 | reply(rec, seq, null); |
| 420 | return; |
| 421 | } |
| 422 | const e = sanitizeAppEvent(app.name, app.memberApp.manifest.types, m.event); |
| 423 | const when = m.when; |
| 424 | const sane = |
| 425 | e && typeof when === "number" && Number.isFinite(when) && |
| 426 | when > Date.now() - 120_000 && when < Date.now() + 2 * 366 * 24 * 3600 * 1000; |
| 427 | if (!sane) { |
| 428 | reply(rec, seq, null); |
| 429 | return; |
| 430 | } |
| 431 | ctx.schedule(e, when).then((sid) => reply(rec, seq, sid || null)); |
| 432 | break; |
| 433 | } |
| 434 | case "unschedule": { |
| 435 | const sid = typeof m.sid === "string" && m.sid.length <= 64 ? m.sid : ""; |
| 436 | if (!sid || !allowSend(rec)) { |
| 437 | reply(rec, m.seq, false); |
| 438 | return; |
| 439 | } |
| 440 | Promise.resolve(ctx.unschedule(sid)).then((ok) => reply(rec, m.seq, !!ok)); |
| 441 | break; |
| 442 | } |
| 443 | case "panel-open": { |
| 444 | // A COMMAND asking for a panel (declarative ctx.panel). Gated to a |
| 445 | // still-live command invocation — the host ctx (with its panel opener, |
| 446 | // bound to where the member typed) is looked up by the command's seq, |
| 447 | // so a frame can't pop panels outside a command it was just asked to |
| 448 | // run ("a response, not an ambush", for member apps too). |
| 449 | const hostCtx = rec.cmdCtx && rec.cmdCtx.get(m.cmdSeq); |
| 450 | const spec = hostCtx && typeof hostCtx.panel === "function" ? sanitizePanelSpec(m.spec) : null; |
| 451 | if (!spec) { |
| 452 | reply(rec, m.seq, false); |
| 453 | return; |
| 454 | } |
| 455 | const opened = hostCtx.panel({ |
| 456 | title: spec.title, |
| 457 | position: spec.position, |
| 458 | animate: spec.animate, |
| 459 | render: (el, handle) => mountPanelFrame(app, hostCtx.threadId, spec.data, el, handle), |
| 460 | onClose: () => teardownPanelMount(app.name), |
| 461 | }); |
| 462 | reply(rec, m.seq, !!opened); |
| 463 | break; |
| 464 | } |
| 465 | case "panel-size": { |
| 466 | // The panel frame fitting its content: clamp and size the iframe; the |
| 467 | // host panel's own body scrolls beyond the cap. |
| 468 | if (!rec.panelFrame) return; |
| 469 | const h = typeof m.h === "number" && Number.isFinite(m.h) ? Math.min(600, Math.max(24, m.h)) : 0; |
| 470 | if (h) rec.iframe.style.height = h + "px"; |
| 471 | break; |
| 472 | } |
| 473 | case "panel-close": { |
| 474 | if (rec.panelFrame && rec.panelHandle) rec.panelHandle.close(); |
| 475 | break; |
| 476 | } |
| 477 | case "panel-insert": { |
| 478 | // A panel acting on the composer it sits above (clamped; the same |
| 479 | // doorway a trusted panel's insertText uses). Should follow a user tap. |
| 480 | if (rec.panelFrame && rec.panelHandle && typeof m.text === "string") { |
| 481 | rec.panelHandle.insertText(m.text.slice(0, 2000)); |
| 482 | } |
| 483 | break; |
| 484 | } |
| 485 | case "error": |
| 486 | note(rec, `App error: ${String(m.message || "unknown").slice(0, 200)}`, true); |
| 487 | break; |
| 488 | } |
| 489 | } |
| 490 | |
| 491 | // ---- command panels for member apps ---------------------------------------- |
| 492 | |
| 493 | // One live panel frame per app (opening another replaces it, like the host |
| 494 | // panel itself). The frame is just another mount: its emits/schedules ride the |
| 495 | // same sanitized, rate-limited bridge; only `state` reports are ignored. |
| 496 | const panelMounts = new Map(); // app name → mount record |
| 497 | |
| 498 | function mountPanelFrame(app, threadId, data, el, handle) { |
| 499 | teardownPanelMount(app.name); |
| 500 | injectSandboxStyles(); |
| 501 | const iframe = document.createElement("iframe"); |
| 502 | iframe.className = "sandbox-frame sandbox-panel-frame"; |
| 503 | iframe.setAttribute("sandbox", "allow-scripts"); |
| 504 | iframe.setAttribute("allow", ""); |
| 505 | iframe.referrerPolicy = "no-referrer"; |
| 506 | iframe.src = "/app-sandbox"; |
| 507 | iframe.style.cssText = "width:100%;border:0;display:block;height:96px"; |
| 508 | const rec = { |
| 509 | iframe, |
| 510 | el, |
| 511 | app, |
| 512 | ctx: memberCtx(threadId, app), |
| 513 | port: null, |
| 514 | sent: new Set(), |
| 515 | emits: [], |
| 516 | panelFrame: true, |
| 517 | panelHandle: handle, |
| 518 | panelData: data, |
| 519 | }; |
| 520 | mounts.set(iframe, rec); |
| 521 | panelMounts.set(app.name, rec); |
| 522 | iframe.addEventListener("load", () => { |
| 523 | rec.port = null; |
| 524 | initMount(rec); |
| 525 | }); |
| 526 | el.appendChild(iframe); |
| 527 | } |
| 528 | |
| 529 | function teardownPanelMount(name) { |
| 530 | const rec = panelMounts.get(name); |
| 531 | if (!rec) return; |
| 532 | panelMounts.delete(name); |
| 533 | // Small grace so a click's in-flight emit still crosses before removal. |
| 534 | setTimeout(() => { |
| 535 | mounts.delete(rec.iframe); |
| 536 | if (rec.iframe.parentNode) rec.iframe.remove(); |
| 537 | }, 2000); |
| 538 | } |
| 539 | |
| 540 | function reply(rec, seq, value) { |
| 541 | if (rec.port && typeof seq === "number") rec.port.postMessage({ type: "rpc-reply", seq, value }); |
| 542 | } |
| 543 | |
| 544 | // allowSend is the shared rate limit on everything a frame may push to the |
| 545 | // wire (emit / ephemeral / schedule / unschedule) — a runaway or hostile app |
| 546 | // can't flood the server with the member's credentials. |
| 547 | function allowSend(rec) { |
| 548 | const now = Date.now(); |
| 549 | rec.emits = rec.emits.filter((t) => now - t < EMIT_WINDOW_MS); |
| 550 | if (rec.emits.length >= EMIT_BURST) { |
| 551 | note(rec, "This app is sending too fast — some of its updates were dropped.", true); |
| 552 | return false; |
| 553 | } |
| 554 | rec.emits.push(now); |
| 555 | return true; |
| 556 | } |
| 557 | |
| 558 | // ---- companion chat --------------------------------------------------------- |
| 559 | |
| 560 | // sanitizeChat cleans a frame's reported companion chat lines to plain data: |
| 561 | // each { mid, ts, text, action } with clamped strings. Untrusted, so bounded. |
| 562 | export function sanitizeChat(lines) { |
| 563 | if (!Array.isArray(lines)) return []; |
| 564 | const out = []; |
| 565 | for (const l of lines.slice(-CHAT_CAP)) { |
| 566 | if (!l || typeof l !== "object") continue; |
| 567 | const mid = l.mid; |
| 568 | const text = typeof l.text === "string" ? l.text : ""; |
| 569 | if (mid == null || !text) continue; |
| 570 | out.push({ |
| 571 | mid, |
| 572 | ts: Number.isFinite(l.ts) ? l.ts : 0, |
| 573 | text: text.slice(0, 400), |
| 574 | action: !!l.action, |
| 575 | }); |
| 576 | } |
| 577 | return out; |
| 578 | } |
| 579 | const CHAT_CAP = 200; |
| 580 | |
| 581 | // foldCompanionChat folds the frame's projected lines into the thread's Chat |
| 582 | // view — the SAME path a trusted companion uses (foldAppEventBubble), a |
| 583 | // chat.msg attributed to the app, deduped by message id. Then refresh the |
| 584 | // surfaces so the Chat pane repaints. |
| 585 | // |
| 586 | // The dedupe id is NAMESPACED (`c:<mid>`), not the raw frame-reported mid: a |
| 587 | // hostile app (which controls its own frame's port) could otherwise report a |
| 588 | // mid equal to a not-yet-folded real message id in its own thread and, via the |
| 589 | // chat app's first-writer-wins dedupe, suppress the installer's own later note. |
| 590 | // Prefixing keeps projected ids in their own space, so they can never collide |
| 591 | // with a real chat.msg id — folding stays idempotent, ordering is by ts. |
| 592 | function foldCompanionChat(threadId, app, lines) { |
| 593 | for (const l of lines) { |
| 594 | foldHostEvent( |
| 595 | threadId, |
| 596 | "chat", |
| 597 | { type: "chat.msg", name: app.title || app.name, text: l.text, uid: "app:" + app.name, ts: l.ts || Date.now(), action: l.action }, |
| 598 | { id: "c:" + l.mid, ts: l.ts }, |
| 599 | ); |
| 600 | } |
| 601 | if (surfaceRefresh) { |
| 602 | try { |
| 603 | surfaceRefresh(threadId); |
| 604 | } catch {} |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | // ---- logic frames + commands ------------------------------------------------ |
| 609 | |
| 610 | // A member app's command handler is untrusted, so it runs in a frame. When the |
| 611 | // app's thread is open its live frame handles it; otherwise a transient hidden |
| 612 | // frame is mounted (seeded from the snapshot) just to execute the command, then |
| 613 | // torn down. Hidden frames live in one offscreen container. |
| 614 | function hiddenContainer() { |
| 615 | let el = document.getElementById("sandbox-hidden"); |
| 616 | if (!el) { |
| 617 | el = document.createElement("div"); |
| 618 | el.id = "sandbox-hidden"; |
| 619 | el.setAttribute("aria-hidden", "true"); |
| 620 | el.style.cssText = "position:absolute;width:0;height:0;overflow:hidden;border:0;left:-9999px;top:0"; |
| 621 | document.body.appendChild(el); |
| 622 | } |
| 623 | return el; |
| 624 | } |
| 625 | |
| 626 | // ensureLogicFrame returns a live frame (with a ready port) bound to |
| 627 | // (app, threadId): a mounted visible/companion frame if one exists, else a |
| 628 | // freshly-mounted transient hidden frame seeded from the snapshot. |
| 629 | async function ensureLogicFrame(app, threadId) { |
| 630 | for (const rec of mounts.values()) { |
| 631 | if (rec.app === app && rec.ctx && rec.ctx.threadId === threadId && rec.port) return rec; |
| 632 | } |
| 633 | // Load the app-thread's snapshot so the frame's getState is accurate for a |
| 634 | // state-reading command (a bare emit doesn't need it, but correctness first). |
| 635 | if (memberSeeder) { |
| 636 | try { |
| 637 | await memberSeeder(threadId); |
| 638 | } catch {} |
| 639 | } |
| 640 | return mountHiddenFrame(app, threadId); |
| 641 | } |
| 642 | |
| 643 | function mountHiddenFrame(app, threadId) { |
| 644 | const iframe = document.createElement("iframe"); |
| 645 | iframe.className = "sandbox-frame"; |
| 646 | iframe.setAttribute("sandbox", "allow-scripts"); |
| 647 | iframe.setAttribute("allow", ""); |
| 648 | iframe.referrerPolicy = "no-referrer"; |
| 649 | iframe.src = "/app-sandbox"; |
| 650 | const rec = { |
| 651 | iframe, |
| 652 | el: hiddenContainer(), |
| 653 | app, |
| 654 | ctx: memberCtx(threadId, app), |
| 655 | port: null, |
| 656 | sent: new Set(), |
| 657 | emits: [], |
| 658 | transient: true, |
| 659 | }; |
| 660 | mounts.set(iframe, rec); |
| 661 | return new Promise((resolve) => { |
| 662 | rec.onReady = () => resolve(rec); |
| 663 | iframe.addEventListener("load", () => { |
| 664 | rec.port = null; |
| 665 | initMount(rec); |
| 666 | if (rec.onReady) { |
| 667 | const r = rec.onReady; |
| 668 | rec.onReady = null; |
| 669 | r(); |
| 670 | } |
| 671 | }); |
| 672 | hiddenContainer().appendChild(iframe); |
| 673 | // Never hang a command on a frame that fails to load. |
| 674 | setTimeout(() => { |
| 675 | if (rec.onReady) { |
| 676 | rec.onReady = null; |
| 677 | resolve(rec); |
| 678 | } |
| 679 | }, 6000); |
| 680 | }); |
| 681 | } |
| 682 | |
| 683 | function teardownTransient(rec) { |
| 684 | if (!rec || !rec.transient || rec.tornDown) return; |
| 685 | rec.tornDown = true; |
| 686 | // Small grace so a late state report / reply still lands before removal. |
| 687 | setTimeout(() => { |
| 688 | mounts.delete(rec.iframe); |
| 689 | if (rec.iframe.parentNode) rec.iframe.remove(); |
| 690 | }, 4000); |
| 691 | } |
| 692 | |
| 693 | // runMemberCommand executes one slash command in a frame and shows its reply |
| 694 | // where the user typed. Invoked by the proxy's command wrapper; `hostCtx` is |
| 695 | // the apps.js ctx bound to the app's thread (with ctx.reply set by runCommand). |
| 696 | async function runMemberCommand(app, hostCtx, cmdName, args) { |
| 697 | const rec = await ensureLogicFrame(app, hostCtx.threadId); |
| 698 | if (!rec) return; |
| 699 | // finally: a transient frame that never got a port (a load-event timeout) |
| 700 | // must still be torn down, or it leaks a stranded hidden iframe. |
| 701 | try { |
| 702 | if (!rec.port) return; |
| 703 | const spec = await sendCommand(rec, cmdName, args, hostCtx); |
| 704 | if (spec && hostCtx.reply) hostCtx.reply(sanitizeReply(spec, app, hostCtx)); |
| 705 | } finally { |
| 706 | teardownTransient(rec); |
| 707 | } |
| 708 | } |
| 709 | |
| 710 | let cmdSeq = 0; |
| 711 | function sendCommand(rec, cmd, args, hostCtx) { |
| 712 | if (!rec.cmdWaiters) rec.cmdWaiters = new Map(); |
| 713 | if (!rec.cmdCtx) rec.cmdCtx = new Map(); |
| 714 | const seq = ++cmdSeq; |
| 715 | // The host ctx stays addressable past the command's reply: a handler may |
| 716 | // reply first and open its panel after an await. The window is bounded. |
| 717 | rec.cmdCtx.set(seq, hostCtx); |
| 718 | setTimeout(() => rec.cmdCtx.delete(seq), 20000); |
| 719 | return new Promise((resolve) => { |
| 720 | rec.cmdWaiters.set(seq, resolve); |
| 721 | rec.port.postMessage({ type: "command", seq, cmd, args: String(args || "") }); |
| 722 | setTimeout(() => { |
| 723 | if (rec.cmdWaiters.delete(seq)) resolve(null); |
| 724 | }, 15000); |
| 725 | }); |
| 726 | } |
| 727 | |
| 728 | // sanitizeReply reduces a frame's command reply to a private confirmation: |
| 729 | // clamped text/short, and a host-owned "Open <app>" chip so the member can |
| 730 | // jump to the app after a quick capture (the ONLY action — the app can't ship |
| 731 | // arbitrary clickable code into the host). |
| 732 | function sanitizeReply(spec, app, hostCtx) { |
| 733 | const text = String(spec.text || "").slice(0, 500); |
| 734 | if (!text) return { text: "" }; |
| 735 | const out = { text, short: spec.short != null ? String(spec.short).slice(0, 200) : undefined }; |
| 736 | if (hostCtx && typeof hostCtx.open === "function") { |
| 737 | out.actions = [{ label: `Open ${app.title || app.name}`, run: hostCtx.open }]; |
| 738 | } |
| 739 | return out; |
| 740 | } |
| 741 | |
| 742 | // The queue fold every proxy type shares: append, bounded. Dropping the |
| 743 | // oldest breaks v-continuity, so mark the state `lost` — the app still works |
| 744 | // forward, and the flag is visible for debugging. (The frame drains the |
| 745 | // queue whenever the app is open, so hitting the cap means hundreds of events |
| 746 | // arrived while this app was never once opened.) |
| 747 | function queueEvent(s, e, meta) { |
| 748 | const pend = [...(s.pend || []), { e, meta: { id: meta && meta.id, ts: meta && meta.ts } }]; |
| 749 | if (pend.length > MAX_PEND) { |
| 750 | return { v: s.v, vUpTo: s.vUpTo || 0, pend: pend.slice(pend.length - MAX_PEND), lost: true }; |
| 751 | } |
| 752 | return { v: s.v, vUpTo: s.vUpTo || 0, pend, lost: s.lost }; |
| 753 | } |
| 754 | |
| 755 | // registerMemberApp validates and registers one decrypted member app as a |
| 756 | // sandbox proxy. Returns { ok: true } or { ok: false, reason }. |
| 757 | const registeredIds = new Set(); |
| 758 | export function registerMemberApp({ id, manifest, source, author }) { |
| 759 | const err = validateManifest(manifest); |
| 760 | if (err) return { ok: false, reason: err }; |
| 761 | if (typeof source !== "string" || !source.trim() || source.length > 512 * 1024) { |
| 762 | return { ok: false, reason: "bad source" }; |
| 763 | } |
| 764 | if (registeredIds.has(id)) return { ok: false, reason: "already registered" }; |
| 765 | if (appByName(manifest.name)) return { ok: false, reason: `an app named "${manifest.name}" already exists` }; |
| 766 | for (const t of manifest.types) { |
| 767 | if (isAppType(t)) return { ok: false, reason: `event type "${t}" is already owned by another app` }; |
| 768 | } |
| 769 | // The command twin of the type check above, and it is LOAD-TIME security, |
| 770 | // not deploy UX: member apps register after the built-ins, so without it a |
| 771 | // crafted blob claiming "/todo" (or "/help") would overwrite commandOwner |
| 772 | // on every member's client and route their typed arguments into the |
| 773 | // hijacker-readable log — worse still for a places:["space"] app, whose |
| 774 | // log every member's hijacked commands would share. |
| 775 | for (const c of manifest.commands || []) { |
| 776 | const taken = commandTakenBy(c.name); |
| 777 | if (taken) return { ok: false, reason: `command ${c.name} is already taken (${taken === "host" ? "built-in" : `by ${taken}`})` }; |
| 778 | } |
| 779 | |
| 780 | const events = {}; |
| 781 | for (const t of manifest.types) events[t] = queueEvent; |
| 782 | |
| 783 | // Command METADATA → proxy handlers. The handler forwards to the app-thread's |
| 784 | // frame (runMemberCommand); the untrusted logic never runs in the page. |
| 785 | const commands = {}; |
| 786 | for (const c of manifest.commands || []) { |
| 787 | commands[c.name] = { |
| 788 | desc: c.desc || "", |
| 789 | args: c.args || "", |
| 790 | run: (args, ctx) => runMemberCommand(app, ctx, c.name, args), |
| 791 | }; |
| 792 | } |
| 793 | |
| 794 | const app = defineApp({ |
| 795 | name: manifest.name, |
| 796 | title: manifest.title, |
| 797 | glyph: manifest.glyph, |
| 798 | symbol: manifest.symbol, |
| 799 | blurb: author ? `Built by ${author}` : "A member-built app", |
| 800 | incremental: true, // the iframe must survive re-renders; we pump instead |
| 801 | initialState: () => ({ v: null, vUpTo: 0, pend: [], chat: [] }), |
| 802 | events, |
| 803 | commands, |
| 804 | // A companion app opts in with manifest.chat: give the proxy a chatMessage |
| 805 | // so appWantsChatView() sees it as a companion (Chat + Interface views). |
| 806 | // It returns null — the real projection runs in the frame and folds into |
| 807 | // the Chat view via foldCompanionChat, so foldAppEventBubble adds nothing. |
| 808 | ...(manifest.chat ? { chatMessage: () => null } : {}), |
| 809 | // defaultCommand: plain text in the Chat view runs this command (validated |
| 810 | // above to be one of `commands`). defaultCommandFor(threadId) reads it, so a |
| 811 | // member app gets the same "type to add" behaviour trusted apps have. |
| 812 | ...(manifest.defaultCommand && commands[manifest.defaultCommand] ? { defaultCommand: manifest.defaultCommand } : {}), |
| 813 | // The app's PLACES (the one-field declaration, docs/space-apps.md): a |
| 814 | // places-first manifest passes straight through — ANY non-empty subset, |
| 815 | // "you" included only if declared (a space-only member app is legal). |
| 816 | // The legacy groupCapable/spaceCapable booleans — stored member apps are |
| 817 | // user content, never migrated — normalize into it, with "you" fixed for |
| 818 | // that generation only (it was personal by definition). Either way this |
| 819 | // is the author's explicit trust decision (declared in the source's |
| 820 | // defineApp, never derived from code shape); the chat/space fold |
| 821 | // machinery (groupapps.*, spaceapps.*) keys off the result. |
| 822 | places: manifest.places || ["you", ...(manifest.groupCapable ? ["chat"] : []), ...(manifest.spaceCapable ? ["space"] : [])], |
| 823 | // listed: false — the implicitly-placed shape (validated above): the app |
| 824 | // stays out of the catalogues; a space-only unlisted app routes to the |
| 825 | // space's one copy on first command, no add gesture (the /gif model). |
| 826 | ...(manifest.listed === false ? { listed: false } : {}), |
| 827 | ...(typeof manifest.placeNote === "string" && manifest.placeNote ? { placeNote: manifest.placeNote } : {}), |
| 828 | // quiet: the author opted this app into never forcing its personal thread |
| 829 | // into view on mere activity (manifest.quiet — same meaning and same |
| 830 | // enforcement path as a built-in app's `quiet`, see apps.js + issue #227). |
| 831 | ...(manifest.quiet ? { quiet: true } : {}), |
| 832 | // memberApp marks the proxy (apps.js gates installMemberAppState on it) |
| 833 | // and carries what the frame needs at init. |
| 834 | memberApp: { id, source, manifest, author: author || "" }, |
| 835 | render(state, el, ctx) { |
| 836 | injectSandboxStyles(); |
| 837 | el.classList.add("sandbox-pane"); |
| 838 | let iframe = el.querySelector("iframe.sandbox-frame"); |
| 839 | const fresh = !iframe; |
| 840 | if (fresh) { |
| 841 | iframe = document.createElement("iframe"); |
| 842 | iframe.className = "sandbox-frame"; |
| 843 | iframe.setAttribute("sandbox", "allow-scripts"); |
| 844 | iframe.setAttribute("allow", ""); |
| 845 | iframe.referrerPolicy = "no-referrer"; |
| 846 | iframe.src = "/app-sandbox"; |
| 847 | } |
| 848 | let rec = mounts.get(iframe); |
| 849 | if (!rec) { |
| 850 | rec = { iframe, el, app, ctx, port: null, sent: new Set(), emits: [] }; |
| 851 | mounts.set(iframe, rec); |
| 852 | // Drop records whose iframe left the DOM for good (thread switched, |
| 853 | // pane rebuilt) so mounts can't grow unboundedly. |
| 854 | for (const [f, r] of [...mounts]) { |
| 855 | if (f !== iframe && !f.isConnected && r.el !== el) mounts.delete(f); |
| 856 | } |
| 857 | } |
| 858 | if (fresh) { |
| 859 | // Init on the (unforgeable) load event — fires on the first load AND |
| 860 | // whenever the pane is re-inserted (which reloads the iframe with a |
| 861 | // fresh document + a fresh port). Reset the port between loads so a |
| 862 | // stale one is never used before re-init. |
| 863 | iframe.addEventListener("load", () => { |
| 864 | rec.port = null; |
| 865 | initMount(rec); |
| 866 | }); |
| 867 | el.appendChild(iframe); |
| 868 | } |
| 869 | rec.ctx = ctx; // renders hand us a fresh ctx; keep the newest |
| 870 | rec.el = el; |
| 871 | if (state && state.lost) { |
| 872 | note(rec, "Some older activity couldn't be kept — this app may be missing items.", false); |
| 873 | } |
| 874 | // Pump: forward queued events the live frame hasn't seen. (No port yet |
| 875 | // means the frame is still loading; init will carry them in the seed.) |
| 876 | if (rec.port) { |
| 877 | const batch = (state && state.pend ? state.pend : []).filter( |
| 878 | (it) => it && it.meta && it.meta.id != null && !rec.sent.has(it.meta.id), |
| 879 | ); |
| 880 | if (batch.length) { |
| 881 | for (const it of batch) rec.sent.add(it.meta.id); |
| 882 | rec.port.postMessage({ type: "events", batch }); |
| 883 | } |
| 884 | } |
| 885 | }, |
| 886 | ephemeral(event, ctx) { |
| 887 | // Relay-only traffic of this app's types, forwarded into a live frame. |
| 888 | for (const rec of mounts.values()) { |
| 889 | if (rec.app === app && rec.port && rec.ctx.threadId === ctx.threadId) { |
| 890 | rec.port.postMessage({ type: "ephemeral-in", event }); |
| 891 | } |
| 892 | } |
| 893 | }, |
| 894 | }); |
| 895 | registeredIds.add(id); |
| 896 | return { ok: true, app }; |
| 897 | } |
| 898 | |
| 899 | // ---- boot-time loading ------------------------------------------------------ |
| 900 | |
| 901 | let loadInflight = null; |
| 902 | |
| 903 | // loadMemberApps fetches, decrypts, and registers every deployed member app. |
| 904 | // Needs the instance key (member-app blobs are sealed under it); when the key |
| 905 | // hasn't arrived yet the call resolves and the shell retries from |
| 906 | // onInstanceKeyReady. authorName maps a user id to a display name for the |
| 907 | // "Built by …" byline (best-effort; may return ""). |
| 908 | export async function loadMemberApps({ token, instanceKey, authorName }) { |
| 909 | if (!instanceKey || loadInflight) return loadInflight; |
| 910 | loadInflight = (async () => { |
| 911 | try { |
| 912 | const r = await fetch(`/api/member-apps?token=${encodeURIComponent(token)}`); |
| 913 | if (!r.ok) return; |
| 914 | const { apps } = await r.json(); |
| 915 | // Decrypt every blob concurrently (they're independent), then register |
| 916 | // in listing order so registration stays deterministic. |
| 917 | const opened = await Promise.all( |
| 918 | (apps || []).map(async (entry) => { |
| 919 | if (!entry || typeof entry.id !== "string" || registeredIds.has(entry.id)) return null; |
| 920 | try { |
| 921 | return { entry, doc: await decrypt(instanceKey, entry.blob) }; |
| 922 | } catch (e) { |
| 923 | console.warn(`member app ${entry.id} failed to load:`, e); |
| 924 | return null; |
| 925 | } |
| 926 | }), |
| 927 | ); |
| 928 | for (const item of opened) { |
| 929 | if (!item) continue; |
| 930 | const { entry, doc } = item; |
| 931 | const res = registerMemberApp({ |
| 932 | id: entry.id, |
| 933 | manifest: doc && doc.manifest, |
| 934 | source: doc && doc.source, |
| 935 | author: (authorName && authorName(entry.author_id)) || "", |
| 936 | }); |
| 937 | if (!res.ok) console.warn(`member app ${entry.id} skipped: ${res.reason}`); |
| 938 | } |
| 939 | } catch (e) { |
| 940 | console.error("member apps skipped:", e); |
| 941 | } finally { |
| 942 | loadInflight = null; |
| 943 | } |
| 944 | })(); |
| 945 | return loadInflight; |
| 946 | } |
| 947 | |
| 948 | // ---- App Studio: member-facing list / deploy / retire ----------------------- |
| 949 | // These power web/static/apps/appstudio.js — a member pasting their own app |
| 950 | // code and deploying it directly, no bot. Privileged (they touch the token + |
| 951 | // instance key), so App Studio is a TRUSTED compiled-in app that imports these; |
| 952 | // sandboxed member apps never can. |
| 953 | |
| 954 | // manifestIsLegacy: does a STORED manifest still speak the legacy placement |
| 955 | // vocabulary — no `places` array, so loading falls back to the old |
| 956 | // scope/groupCapable/spaceCapable fields? Loading such an app keeps working |
| 957 | // (the one compat funnel — docs/member-apps.md § Legacy formats), but App |
| 958 | // Studio flags it and offers a one-tap upgrade: redeploying the SAME source |
| 959 | // re-mints a current manifest (manifestOf emits places-first), a new version |
| 960 | // with the old kept in History. Pure, exported for tests. |
| 961 | export function manifestIsLegacy(m) { |
| 962 | return !!m && !Array.isArray(m.places); |
| 963 | } |
| 964 | |
| 965 | // recentLocalDeploy lets shell.js skip a full page reload on the apps_changed |
| 966 | // broadcast this client just caused — it registers the new app live instead. |
| 967 | let lastLocalDeployAt = 0; |
| 968 | export function recentLocalDeploy() { |
| 969 | return Date.now() - lastLocalDeployAt < 5000; |
| 970 | } |
| 971 | |
| 972 | function mintAppId() { |
| 973 | const b = crypto.getRandomValues(new Uint8Array(6)); |
| 974 | return "app-" + [...b].map((x) => x.toString(16).padStart(2, "0")).join(""); |
| 975 | } |
| 976 | |
| 977 | // extractManifest runs pasted source in a throwaway sandbox frame purely to |
| 978 | // read back its manifest (the real defineApp, evaluated in the cage) — never in |
| 979 | // the page. Returns { manifest } or { error }. |
| 980 | export function extractManifest(source) { |
| 981 | if (typeof source !== "string" || !source.trim()) return Promise.resolve({ error: "paste some app code first" }); |
| 982 | if (source.length > 512 * 1024) return Promise.resolve({ error: "that code is too large" }); |
| 983 | return new Promise((resolve) => { |
| 984 | const iframe = document.createElement("iframe"); |
| 985 | iframe.setAttribute("sandbox", "allow-scripts"); |
| 986 | iframe.setAttribute("allow", ""); |
| 987 | iframe.referrerPolicy = "no-referrer"; |
| 988 | iframe.src = "/app-sandbox"; |
| 989 | iframe.style.cssText = "position:absolute;width:0;height:0;border:0;left:-9999px;top:0"; |
| 990 | let done = false; |
| 991 | const finish = (v) => { |
| 992 | if (done) return; |
| 993 | done = true; |
| 994 | iframe.remove(); |
| 995 | resolve(v); |
| 996 | }; |
| 997 | iframe.addEventListener("load", () => { |
| 998 | const chan = new MessageChannel(); |
| 999 | chan.port1.onmessage = (ev) => { |
| 1000 | const m = ev.data; |
| 1001 | if (m && m.type === "extracted") finish(m.error ? { error: m.error } : { manifest: m.manifest }); |
| 1002 | }; |
| 1003 | iframe.contentWindow.postMessage({ type: "lchat-sandbox-init", extract: true, source }, "*", [chan.port2]); |
| 1004 | }); |
| 1005 | hiddenContainer().appendChild(iframe); |
| 1006 | setTimeout(() => finish({ error: "the app didn't load in time" }), 6000); |
| 1007 | }); |
| 1008 | } |
| 1009 | |
| 1010 | // listDeployedApps returns every deployed member app (decrypted), each flagged |
| 1011 | // `mine` when the current member owns it — whether they deployed it themselves or |
| 1012 | // a bot built it for them (owner_id), so their Claude-built apps are theirs to |
| 1013 | // edit/remove too. For App Studio's list. |
| 1014 | export async function listDeployedApps() { |
| 1015 | const admin = memberAdmin && memberAdmin(); |
| 1016 | if (!admin || !admin.instanceKey) return { error: "your space key hasn't loaded yet — try again in a moment" }; |
| 1017 | let apps; |
| 1018 | try { |
| 1019 | const r = await fetch(`/api/member-apps?token=${encodeURIComponent(admin.token)}`); |
| 1020 | if (!r.ok) return { error: `couldn't list apps (${r.status})` }; |
| 1021 | ({ apps } = await r.json()); |
| 1022 | } catch (e) { |
| 1023 | return { error: "couldn't reach the server" }; |
| 1024 | } |
| 1025 | const out = []; |
| 1026 | for (const entry of apps || []) { |
| 1027 | if (!entry || typeof entry.id !== "string") continue; |
| 1028 | let doc = null; |
| 1029 | try { |
| 1030 | doc = await decrypt(admin.instanceKey, entry.blob); |
| 1031 | } catch { |
| 1032 | // A blob we can't open (shouldn't happen — one instance key) still lists |
| 1033 | // by id so an admin could retire it. |
| 1034 | } |
| 1035 | out.push({ |
| 1036 | id: entry.id, |
| 1037 | manifest: (doc && doc.manifest) || null, |
| 1038 | source: (doc && doc.source) || "", |
| 1039 | mine: entry.owner_id === admin.uid || entry.author_id === admin.uid, |
| 1040 | // AI-generated: a bot deployed it for its owner (deployer ≠ owner). A |
| 1041 | // hand-deployed app has author === owner. (Only meaningful once owner_id is |
| 1042 | // recorded, so legacy owner-less apps read as not-bot.) |
| 1043 | byBot: !!(entry.owner_id && entry.author_id && entry.author_id !== entry.owner_id), |
| 1044 | version: entry.version, |
| 1045 | updatedAt: entry.updated_at, |
| 1046 | }); |
| 1047 | } |
| 1048 | return { apps: out }; |
| 1049 | } |
| 1050 | |
| 1051 | // listAppVersions returns an app's version history (decrypted), newest first, |
| 1052 | // for App Studio's History view. Each entry carries the source so "Restore" can |
| 1053 | // re-deploy it (see deployMemberApp) — which records it as a new version. |
| 1054 | export async function listAppVersions(id) { |
| 1055 | const admin = memberAdmin && memberAdmin(); |
| 1056 | if (!admin || !admin.instanceKey) return { error: "your space key hasn't loaded yet — try again in a moment" }; |
| 1057 | let data; |
| 1058 | try { |
| 1059 | const r = await fetch(`/api/member-apps/${encodeURIComponent(id)}/versions?token=${encodeURIComponent(admin.token)}`); |
| 1060 | if (!r.ok) return { error: `couldn't load history (${r.status})` }; |
| 1061 | data = await r.json(); |
| 1062 | } catch { |
| 1063 | return { error: "couldn't reach the server" }; |
| 1064 | } |
| 1065 | const out = []; |
| 1066 | for (const v of data.versions || []) { |
| 1067 | let doc = null; |
| 1068 | try { |
| 1069 | doc = await decrypt(admin.instanceKey, v.blob); |
| 1070 | } catch {} |
| 1071 | out.push({ |
| 1072 | version: v.version, |
| 1073 | current: v.version === data.current, |
| 1074 | source: (doc && doc.source) || "", |
| 1075 | byMe: v.author_id === admin.uid, |
| 1076 | at: v.created_at, |
| 1077 | based_on: v.based_on || 0, // the version this one was reverted from (0 = none) |
| 1078 | }); |
| 1079 | } |
| 1080 | return { current: data.current, versions: out }; |
| 1081 | } |
| 1082 | |
| 1083 | // deployMemberApp validates + deploys pasted source directly (App Studio's |
| 1084 | // Deploy). Pass { id } to UPDATE an app you already own (same thread + state); |
| 1085 | // omit it to create a new one. Pass { basedOn: N } on a revert to mark the new |
| 1086 | // version as "based on version N". Returns { ok, id, updated } or { error }. |
| 1087 | export async function deployMemberApp(source, opts = {}) { |
| 1088 | const admin = memberAdmin && memberAdmin(); |
| 1089 | if (!admin || !admin.instanceKey) return { error: "your space key hasn't loaded yet — try again in a moment" }; |
| 1090 | const ext = await extractManifest(source); |
| 1091 | if (ext.error) return { error: ext.error }; |
| 1092 | const manifest = ext.manifest; |
| 1093 | const verr = validateManifest(manifest); |
| 1094 | if (verr) return { error: verr }; |
| 1095 | |
| 1096 | const updating = !!opts.id; |
| 1097 | if (!updating) { |
| 1098 | // A NEW app can't collide with an already-registered name/event type. |
| 1099 | if (appByName(manifest.name)) return { error: `an app named “${manifest.name}” already exists — rename yours` }; |
| 1100 | for (const t of manifest.types) { |
| 1101 | if (isAppType(t)) return { error: `event type “${t}” is already used by another app` }; |
| 1102 | } |
| 1103 | } |
| 1104 | // Command names can't collide either — with a built-in verb, the host set |
| 1105 | // (/help, /me, …), or another app's. An UPDATE may of course keep the |
| 1106 | // commands this app itself already owns. registerMemberApp enforces the |
| 1107 | // same rule at load time on every client (that one is the security gate — |
| 1108 | // a blob can be crafted straight to the API); this check is the friendly |
| 1109 | // deploy-time error. |
| 1110 | for (const c of manifest.commands || []) { |
| 1111 | const taken = commandTakenBy(c.name); |
| 1112 | if (taken && taken !== manifest.name) return { error: `command ${c.name} is already taken (${taken === "host" ? "built-in" : `by ${taken}`}) — pick another name` }; |
| 1113 | } |
| 1114 | const id = opts.id || mintAppId(); |
| 1115 | const doc = { source, manifest: { ...manifest, owner: admin.uid, by: admin.name || "" } }; |
| 1116 | let blob; |
| 1117 | try { |
| 1118 | blob = await encrypt(admin.instanceKey, doc); |
| 1119 | } catch { |
| 1120 | return { error: "couldn't encrypt the app" }; |
| 1121 | } |
| 1122 | let res; |
| 1123 | try { |
| 1124 | const put = { token: admin.token, blob }; |
| 1125 | if (updating && opts.basedOn > 0) put.based_on = opts.basedOn; |
| 1126 | res = await fetch(`/api/member-apps/${encodeURIComponent(id)}`, { |
| 1127 | method: "PUT", |
| 1128 | headers: { "Content-Type": "application/json" }, |
| 1129 | body: JSON.stringify(put), |
| 1130 | }); |
| 1131 | } catch { |
| 1132 | return { error: "couldn't reach the server" }; |
| 1133 | } |
| 1134 | if (!res.ok) { |
| 1135 | // The server says why in httpError's {error} body — the feature gates |
| 1136 | // ("making your own apps is turned off for this space"), the app caps, |
| 1137 | // author-only updates. Show its words rather than guessing from the |
| 1138 | // status (a guessed "app limit" on a gated 403 misleads). |
| 1139 | const msg = await res.json().then((j) => (j && j.error) || "").catch(() => ""); |
| 1140 | return { error: msg || `deploy was rejected (${res.status})` }; |
| 1141 | } |
| 1142 | // A brand-new app registers live so it's usable without a reload (and we |
| 1143 | // suppress this client's own apps_changed reload). An UPDATE changes code the |
| 1144 | // running proxy already loaded, so it needs a fresh load — let the |
| 1145 | // apps_changed broadcast reload every client, this one included. |
| 1146 | lastLocalDeployAt = updating ? 0 : Date.now(); |
| 1147 | if (!updating && !registeredIds.has(id)) { |
| 1148 | registerMemberApp({ id, manifest: doc.manifest, source, author: admin.name || "" }); |
| 1149 | } |
| 1150 | return { ok: true, id, updated: updating }; |
| 1151 | } |
| 1152 | |
| 1153 | // openMemberApp launches a member app's personal thread (App Studio's "Open"), |
| 1154 | // via the host opener shell.js injects. |
| 1155 | export function openMemberApp(name) { |
| 1156 | const admin = memberAdmin && memberAdmin(); |
| 1157 | if (admin && admin.openApp) return admin.openApp(name); |
| 1158 | } |
| 1159 | |
| 1160 | // The rest of the place-aware "Open" seam (appOpenPlan in ui.js): the group |
| 1161 | // chats an app could be added to, the add-and-land opener for one of them, |
| 1162 | // the space-wide opener, and whether this page is a native embed (where only |
| 1163 | // the personal open can hand off to the native shell today). All thin |
| 1164 | // forwards to the host context — the studio never touches shell state itself. |
| 1165 | export function memberAppGroups() { |
| 1166 | const admin = memberAdmin && memberAdmin(); |
| 1167 | return admin && admin.groups ? admin.groups() : []; |
| 1168 | } |
| 1169 | export function openMemberAppInGroup(name, threadId) { |
| 1170 | const admin = memberAdmin && memberAdmin(); |
| 1171 | return admin && admin.openAppInGroup ? admin.openAppInGroup(name, threadId) : false; |
| 1172 | } |
| 1173 | export function openMemberAppForSpace(name) { |
| 1174 | const admin = memberAdmin && memberAdmin(); |
| 1175 | return admin && admin.openAppForSpace ? admin.openAppForSpace(name) : false; |
| 1176 | } |
| 1177 | export function memberHostEmbedded() { |
| 1178 | const admin = memberAdmin && memberAdmin(); |
| 1179 | return !!(admin && admin.embedded); |
| 1180 | } |
| 1181 | |
| 1182 | // retireMemberApp deletes a member app (author-only, enforced server-side). |
| 1183 | export async function retireMemberApp(id) { |
| 1184 | const admin = memberAdmin && memberAdmin(); |
| 1185 | if (!admin) return { error: "not ready" }; |
| 1186 | try { |
| 1187 | const r = await fetch(`/api/member-apps/${encodeURIComponent(id)}?token=${encodeURIComponent(admin.token)}`, { method: "DELETE" }); |
| 1188 | if (!r.ok) return { error: r.status === 403 ? "only the author can remove this app" : `couldn't remove it (${r.status})` }; |
| 1189 | } catch { |
| 1190 | return { error: "couldn't reach the server" }; |
| 1191 | } |
| 1192 | return { ok: true }; |
| 1193 | } |
| 1194 | |
amadan