Jon Staab
30 lines
830 B
TypeScript
30 lines
830 B
TypeScript
import {writable} from 'svelte/store'
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import {assoc, batch} from '@welshman/lib'
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import {withGetter} from '@welshman/store'
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export type FreshnessUpdate = {
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ns: string
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key: string
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ts: number
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}
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export const freshness = withGetter(writable<Record<string, number>>({}))
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export const getFreshnessKey = (ns: string, key: string) => `${ns}:${key}`
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export const getFreshness = (ns: string, key: string) =>
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freshness.get()[getFreshnessKey(ns, key)] || 0
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export const setFreshnessImmediate = ({ns, key, ts}: FreshnessUpdate) =>
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freshness.update(assoc(getFreshnessKey(ns, key), ts))
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export const setFreshnessThrottled = batch(100, (updates: FreshnessUpdate[]) =>
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freshness.update($freshness => {
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for (const {ns, key, ts} of updates) {
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$freshness[getFreshnessKey(ns, key)] = ts
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}
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return $freshness
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})
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)
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