Pick any line to see why it is the way it is: the commit, the pull request and issue it came from, and what the agent was thinking.
| Chat is the phone app's first part, in full and live, with notifications on the phone. Conversations draw messages as the site does, from the same Markdown parser, run one author's messages together and mark the days; new messages, edits, deletions, reactions and typing arrive over the conversation's socket, and what you send shows at once and can be sent again if it fails. Agents' cards work: their buttons act from the phone, asking first or for an amount when the card does. Long-press a message to react, reply in a thread, copy it, or edit or delete your own; threads open with the message they are under; a conversation can be starred, muted or left; New message messages people and agents or makes a channel, and Browse joins channels. While the app is in front it keeps the person's feed open as a tab does: unread counts move on the list and the Chat tab, notifications show as a banner unless that conversation is open, and DMs show who is online. The bar is the site's phone bar: Home, Notifications and Agents say they are coming and open the site, and Customize and the account move under More. | 1 | import type { Client } from "./client"; |
| 2 | import { socketUrl } from "./server"; | |
| 3 | ||
| 4 | /** | |
| 5 | * One of the site's live sockets, kept open: a conversation's | |
| 6 | * (`/<workspace>/-/chat/live`) or the person's feed (`/-/live`). A socket | |
| 7 | * cannot carry the `Authorization` header, so each opening asks | |
| 8 | * `GET /-/live/ticket?path=<path>` for a ticket (good for a minute, for | |
| 9 | * that socket alone; apps/web/app/lib/socket-ticket.ts) and adds it to | |
| 10 | * the address. A dropped socket opens again, with a new ticket, waiting | |
| 11 | * longer each time up to half a minute; a `ping` every 25 s keeps it | |
| 12 | * from being taken for gone. | |
| 13 | */ | |
| 14 | ||
| 15 | export type SocketStatus = "connecting" | "live" | "offline"; | |
| 16 | ||
| 17 | type Handlers = { | |
| 18 | onMessage: (data: unknown) => void; | |
| 19 | onStatus?: (status: SocketStatus) => void; | |
| 20 | /** Opened again after a drop: what was missed meanwhile should be read again. */ | |
| 21 | onReconnect?: () => void; | |
| 22 | onOpen?: (send: (frame: unknown) => void) => void; | |
| 23 | }; | |
| 24 | ||
| 25 | const PING_MS = 25_000; | |
| 26 | ||
| 27 | export function openSocket(client: Client, path: string, query: Record<string, string>, handlers: Handlers) { | |
| 28 | let socket: WebSocket | null = null; | |
| 29 | let closed = false; | |
| 30 | let attempts = 0; | |
| 31 | let opened = false; | |
| 32 | let retry: ReturnType<typeof setTimeout> | null = null; | |
| 33 | let ping: ReturnType<typeof setInterval> | null = null; | |
| 34 | ||
| 35 | const send = (frame: unknown) => { | |
| 36 | if (socket?.readyState === WebSocket.OPEN) socket.send(typeof frame === "string" ? frame : JSON.stringify(frame)); | |
| 37 | }; | |
| 38 | ||
| 39 | const again = () => { | |
| 40 | if (ping) clearInterval(ping); | |
| 41 | ping = null; | |
| 42 | if (closed) return; | |
| 43 | handlers.onStatus?.("offline"); | |
| 44 | attempts += 1; | |
| 45 | retry = setTimeout(open, Math.min(30_000, 1_000 * 2 ** Math.min(attempts - 1, 5))); | |
| 46 | }; | |
| 47 | ||
| 48 | async function open() { | |
| 49 | if (closed) return; | |
| 50 | handlers.onStatus?.("connecting"); | |
| 51 | let ticket: string; | |
| 52 | try { | |
| 53 | const token = await client.token(); | |
| 54 | const response = await fetch(`${client.server.site}/-/live/ticket?path=${encodeURIComponent(path)}`, { | |
| 55 | headers: { authorization: `Bearer ${token}`, accept: "application/json" }, | |
| 56 | }); | |
| 57 | if (!response.ok) throw new Error(`ticket ${response.status}`); | |
| 58 | ticket = ((await response.json()) as { ticket: string }).ticket; | |
| 59 | } catch { | |
| 60 | return again(); | |
| 61 | } | |
| 62 | if (closed) return; | |
| 63 | const address = `${socketUrl(client.server, path)}?${new URLSearchParams({ ...query, ticket })}`; | |
| 64 | const next = new WebSocket(address); | |
| 65 | socket = next; | |
| 66 | next.onopen = () => { | |
| 67 | const wasOpened = opened; | |
| 68 | opened = true; | |
| 69 | attempts = 0; | |
| 70 | handlers.onStatus?.("live"); | |
| 71 | ping = setInterval(() => send("ping"), PING_MS); | |
| 72 | handlers.onOpen?.(send); | |
| 73 | if (wasOpened) handlers.onReconnect?.(); | |
| 74 | }; | |
| 75 | next.onmessage = (event) => { | |
| 76 | if (event.data === "pong") return; | |
| 77 | try { | |
| 78 | handlers.onMessage(JSON.parse(String(event.data))); | |
| 79 | } catch { | |
| 80 | // Not JSON: nothing for the app. | |
| 81 | } | |
| 82 | }; | |
| 83 | next.onclose = () => { | |
| 84 | if (socket === next) again(); | |
| 85 | }; | |
| 86 | } | |
| 87 | ||
| 88 | void open(); | |
| 89 | ||
| 90 | return { | |
| 91 | send, | |
| 92 | close() { | |
| 93 | closed = true; | |
| 94 | if (retry) clearTimeout(retry); | |
| 95 | if (ping) clearInterval(ping); | |
| 96 | socket?.close(); | |
| 97 | socket = null; | |
| 98 | }, | |
| 99 | }; | |
| 100 | } |