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Copy pathlock.ts
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94 lines (84 loc) · 2.42 KB
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import z from "zod/v4"
import { Instance } from "../project/instance"
import { Log } from "../util/log"
import { NamedError } from "../util/error"
export namespace SessionLock {
const log = Log.create({ service: "session.lock" })
export const LockedError = NamedError.create(
"SessionLockedError",
z.object({
sessionID: z.string(),
message: z.string(),
}),
)
type LockState = {
controller: AbortController
created: number
}
const state = Instance.state(
() => {
const locks = new Map<string, LockState>()
return {
locks,
}
},
async (current) => {
for (const [sessionID, lock] of current.locks) {
log.info("force abort", { sessionID })
lock.controller.abort()
}
current.locks.clear()
},
)
function get(sessionID: string) {
return state().locks.get(sessionID)
}
function unset(input: { sessionID: string; controller: AbortController }) {
const lock = get(input.sessionID)
if (!lock) return false
if (lock.controller !== input.controller) return false
state().locks.delete(input.sessionID)
return true
}
export function acquire(input: { sessionID: string }) {
const lock = get(input.sessionID)
if (lock) {
throw new LockedError({ sessionID: input.sessionID, message: `Session ${input.sessionID} is locked` })
}
const controller = new AbortController()
state().locks.set(input.sessionID, {
controller,
created: Date.now(),
})
log.info("locked", { sessionID: input.sessionID })
return {
signal: controller.signal,
abort() {
controller.abort()
unset({ sessionID: input.sessionID, controller })
},
async [Symbol.dispose]() {
const removed = unset({ sessionID: input.sessionID, controller })
if (removed) {
log.info("unlocked", { sessionID: input.sessionID })
}
},
}
}
export function abort(sessionID: string) {
const lock = get(sessionID)
if (!lock) return false
log.info("abort", { sessionID })
lock.controller.abort()
state().locks.delete(sessionID)
return true
}
export function isLocked(sessionID: string) {
return get(sessionID) !== undefined
}
export function assertUnlocked(sessionID: string) {
const lock = get(sessionID)
if (!lock) return
throw new LockedError({ sessionID, message: `Session ${sessionID} is locked` })
}
}