| 1 | import type { TerminalSessionState } from "@t3tools/client-runtime/state/terminal"; |
| 2 | import { useEffect, useEffectEvent, useRef } from "react"; |
| 3 | |
| 4 | /** Keep observed history passive while preserving explicit terminal visits and live exits. */ |
| 5 | export function useTerminalLifecycle({ |
| 6 | terminalKey, |
| 7 | canOperate, |
| 8 | observing, |
| 9 | attached, |
| 10 | terminal, |
| 11 | reopen, |
| 12 | onRunning, |
| 13 | onExit, |
| 14 | }: { |
| 15 | readonly terminalKey: string; |
| 16 | readonly canOperate: boolean; |
| 17 | readonly observing: boolean; |
| 18 | readonly attached: boolean; |
| 19 | readonly terminal: Pick<TerminalSessionState, "status" | "version">; |
| 20 | readonly reopen: () => Promise<boolean>; |
| 21 | readonly onRunning: () => void; |
| 22 | readonly onExit: () => void; |
| 23 | }) { |
| 24 | const lifecycle = useRef({ |
| 25 | key: terminalKey, |
| 26 | wasRunning: false, |
| 27 | observed: false, |
| 28 | reopened: false, |
| 29 | }); |
| 30 | const reopenTerminal = useEffectEvent(reopen); |
| 31 | const handleRunning = useEffectEvent(onRunning); |
| 32 | const handleExit = useEffectEvent(onExit); |
| 33 | |
| 34 | useEffect(() => { |
| 35 | if (lifecycle.current.key !== terminalKey) { |
| 36 | lifecycle.current = { |
| 37 | key: terminalKey, |
| 38 | wasRunning: false, |
| 39 | observed: false, |
| 40 | reopened: false, |
| 41 | }; |
| 42 | } |
| 43 | const current = lifecycle.current; |
| 44 | if (!canOperate) { |
| 45 | // An observe request stays passive before its first snapshot arrives. |
| 46 | if (observing || terminal.version > 0 || current.wasRunning) current.observed = true; |
| 47 | current.wasRunning = false; |
| 48 | return; |
| 49 | } |
| 50 | if (!attached) { |
| 51 | current.wasRunning = false; |
| 52 | return; |
| 53 | } |
| 54 | // An attachment without its first snapshot has no known process status yet. |
| 55 | if (terminal.version === 0) return; |
| 56 | |
| 57 | if (terminal.status === "running" || terminal.status === "starting") { |
| 58 | current.wasRunning = true; |
| 59 | current.reopened = false; |
| 60 | handleRunning(); |
| 61 | return; |
| 62 | } |
| 63 | if (terminal.status !== "closed" && terminal.status !== "exited") return; |
| 64 | |
| 65 | if (current.wasRunning) { |
| 66 | current.wasRunning = false; |
| 67 | current.reopened = true; |
| 68 | handleExit(); |
| 69 | return; |
| 70 | } |
| 71 | // An explicit visit can reopen a cached ended session. Granting a viewer |
| 72 | // operate permission must leave the history they were reading intact. |
| 73 | if (current.observed || current.reopened) return; |
| 74 | current.reopened = true; |
| 75 | void reopenTerminal().then((succeeded) => { |
| 76 | if (!succeeded && lifecycle.current === current) current.reopened = false; |
| 77 | }); |
| 78 | }, [attached, canOperate, observing, terminal.status, terminal.version, terminalKey]); |
| 79 | } |