40 lines
1.4 KiB
JavaScript
40 lines
1.4 KiB
JavaScript
'use strict'
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const nullTime = () => ''
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const epochTime = () => `,"time":${Date.now()}`
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const unixTime = () => `,"time":${Math.round(Date.now() / 1000.0)}`
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const isoTime = () => `,"time":"${new Date(Date.now()).toISOString()}"` // using Date.now() for testability
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const NS_PER_MS = 1_000_000n
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const NS_PER_SEC = 1_000_000_000n
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const startWallTimeNs = BigInt(Date.now()) * NS_PER_MS
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const startHrTime = process.hrtime.bigint()
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const isoTimeNano = () => {
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const elapsedNs = process.hrtime.bigint() - startHrTime
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const currentTimeNs = startWallTimeNs + elapsedNs
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const secondsSinceEpoch = currentTimeNs / NS_PER_SEC
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const nanosWithinSecond = currentTimeNs % NS_PER_SEC
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const msSinceEpoch = Number(secondsSinceEpoch * 1000n + nanosWithinSecond / 1_000_000n)
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const date = new Date(msSinceEpoch)
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const year = date.getUTCFullYear()
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const month = (date.getUTCMonth() + 1).toString().padStart(2, '0')
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const day = date.getUTCDate().toString().padStart(2, '0')
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const hours = date.getUTCHours().toString().padStart(2, '0')
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const minutes = date.getUTCMinutes().toString().padStart(2, '0')
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const seconds = date.getUTCSeconds().toString().padStart(2, '0')
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return `,"time":"${year}-${month}-${day}T${hours}:${minutes}:${seconds}.${nanosWithinSecond
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.toString()
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.padStart(9, '0')}Z"`
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}
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module.exports = { nullTime, epochTime, unixTime, isoTime, isoTimeNano }
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