| 1 | import type { SessionTranscript } from "./transcriptStoreTypes"; |
| 2 | import { releaseHistoryRead } from "./historyReadScope"; |
| 3 | |
| 4 | export type TranscriptTabBinding = { |
| 5 | key: string; |
| 6 | sessionPath: string; |
| 7 | bindingKey: string; |
| 8 | }; |
| 9 | |
| 10 | function legacySessionKeyFor(tabId: string, sessionPath: string): string { |
| 11 | return `${tabId}\n${sessionPath}`; |
| 12 | } |
| 13 | |
| 14 | function stableSessionKeyFor(bindingKey: string): string | undefined { |
| 15 | return bindingKey.startsWith("s\0") ? `stable\0${bindingKey}` : undefined; |
| 16 | } |
| 17 | |
| 18 | export function boundSessionKey( |
| 19 | bindings: Map<string, TranscriptTabBinding>, |
| 20 | tabId: string, |
| 21 | sessionPath: string, |
| 22 | ): string { |
| 23 | const binding = bindings.get(tabId); |
| 24 | return binding?.sessionPath === sessionPath ? binding.key : legacySessionKeyFor(tabId, sessionPath); |
| 25 | } |
| 26 | |
| 27 | /** Eviction may retire an old canonical cache after its tab has been rebound. */ |
| 28 | export function releaseTranscriptSessionRead(bindings: Map<string, TranscriptTabBinding>, session: SessionTranscript): void { |
| 29 | if (bindings.get(session.tabId)?.key === session.key) releaseHistoryRead(session.tabId); |
| 30 | } |
| 31 | |
| 32 | export function bindTranscriptSession( |
| 33 | bindings: Map<string, TranscriptTabBinding>, |
| 34 | sessions: Map<string, SessionTranscript>, |
| 35 | tabId: string, |
| 36 | sessionPath: string, |
| 37 | bindingKey: string, |
| 38 | create: (key: string) => SessionTranscript, |
| 39 | evict: (session: SessionTranscript) => void, |
| 40 | touch: (session: SessionTranscript) => void, |
| 41 | ): boolean { |
| 42 | const previous = bindings.get(tabId); |
| 43 | const key = stableSessionKeyFor(bindingKey) ?? legacySessionKeyFor(tabId, sessionPath); |
| 44 | if (previous?.key === key && previous.sessionPath === sessionPath && previous.bindingKey === bindingKey) return false; |
| 45 | if (previous) releaseHistoryRead(tabId); |
| 46 | const replaced = Boolean(previous); |
| 47 | bindings.delete(tabId); |
| 48 | if (previous && (previous.key !== key || (!key.startsWith("stable\0") && previous.bindingKey !== bindingKey))) { |
| 49 | const previousSession = sessions.get(previous.key); |
| 50 | if (previousSession && !previous.key.startsWith("stable\0")) evict(previousSession); |
| 51 | } |
| 52 | let session = sessions.get(key); |
| 53 | if (!session) { |
| 54 | session = create(key); |
| 55 | sessions.set(key, session); |
| 56 | } else if (session.tabId !== tabId || session.sessionPath !== sessionPath) { |
| 57 | session.generation += 1; |
| 58 | session.pendingContent.clear(); |
| 59 | for (const [otherTabId, binding] of bindings) { |
| 60 | if (binding.key === key) bindings.delete(otherTabId); |
| 61 | } |
| 62 | session.tabId = tabId; |
| 63 | session.sessionPath = sessionPath; |
| 64 | } |
| 65 | session.bindingKey = bindingKey; |
| 66 | bindings.set(tabId, { key, sessionPath, bindingKey }); |
| 67 | touch(session); |
| 68 | return replaced; |
| 69 | } |
| 70 | |
| 71 | export function detachTranscriptTab( |
| 72 | bindings: Map<string, TranscriptTabBinding>, |
| 73 | sessions: Map<string, SessionTranscript>, |
| 74 | tabId: string, |
| 75 | evict: (session: SessionTranscript) => void, |
| 76 | ): void { |
| 77 | releaseHistoryRead(tabId); |
| 78 | const binding = bindings.get(tabId); |
| 79 | bindings.delete(tabId); |
| 80 | if (binding && !binding.key.startsWith("stable\0")) { |
| 81 | const session = sessions.get(binding.key); |
| 82 | if (session) evict(session); |
| 83 | } else if (!binding) { |
| 84 | for (const session of Array.from(sessions.values())) { |
| 85 | if (session.tabId === tabId && !session.key.startsWith("stable\0")) evict(session); |
| 86 | } |
| 87 | } |
| 88 | } |
| 89 |