41 lines
1.1 KiB
TypeScript
41 lines
1.1 KiB
TypeScript
export interface CronTriggerRunResult<T> {
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started: boolean
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value: T | null
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}
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export interface CronTriggerController {
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isRunning(key: string): boolean
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run<T>(key: string, action: () => Promise<T>, onStarted?: () => void): Promise<CronTriggerRunResult<T>>
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}
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// This is an interaction guard for one mounted UI surface. Cross-window and
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// cross-process exclusion remains the backend's responsibility via its durable
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// cron claim; a renderer-local Set must never be treated as the execution lock.
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export function createCronTriggerController(
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onRunningChange: (key: string, running: boolean) => void = () => undefined
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): CronTriggerController {
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const running = new Set<string>()
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return {
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isRunning: key => running.has(key),
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async run<T>(key: string, action: () => Promise<T>, onStarted?: () => void) {
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if (running.has(key)) {
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return { started: false, value: null }
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}
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running.add(key)
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try {
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onRunningChange(key, true)
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onStarted?.()
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return { started: true, value: await action() }
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} finally {
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running.delete(key)
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onRunningChange(key, false)
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}
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}
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}
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}
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