43 lines
1.3 KiB
TypeScript
43 lines
1.3 KiB
TypeScript
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const MAX_CACHE_SIZE = 30
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const cache = new Map<string, unknown>()
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function dataFingerprint(data: unknown[][] | undefined): string {
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if (!data?.length) return '0'
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const first = data[0]
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const last = data[data.length - 1]
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return `${data.length}:${first?.[0]}:${last?.[0]}`
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}
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export function buildWaveCacheKey(
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type: 'shu' | 'rms',
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wp: Record<string, any> | undefined,
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value: number,
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isOpen: boolean,
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boxoList: Record<string, any>
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): string {
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if (!wp) return ''
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const waveFp =
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type === 'shu' ? dataFingerprint(wp.listWaveData) : dataFingerprint(wp.listRmsData)
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const boxoFp = boxoList?.startTime ?? boxoList?.lineName ?? boxoList?.equipmentName ?? ''
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return `${type}|${wp.time}|${wp.waveType}|${wp.iphasic}|${value}|${isOpen}|${waveFp}|${boxoFp}`
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}
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export function getWaveCache<T>(key: string): T | null {
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if (!key || !cache.has(key)) return null
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const value = cache.get(key) as T
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cache.delete(key)
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cache.set(key, value)
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return value
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}
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export function setWaveCache(key: string, value: unknown): void {
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if (!key) return
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if (cache.has(key)) cache.delete(key)
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cache.set(key, value)
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while (cache.size > MAX_CACHE_SIZE) {
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const oldest = cache.keys().next().value
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if (oldest !== undefined) cache.delete(oldest)
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}
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}
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