mirror of
https://github.com/vale981/Vulcan
synced 2025-03-10 04:26:41 -04:00
29 lines
572 B
JavaScript
29 lines
572 B
JavaScript
export const recalculateScore = item => {
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// Age Check
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if (item.postedAt) {
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const postedAt = item.postedAt.valueOf();
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const now = new Date().getTime();
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const age = now - postedAt;
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const ageInHours = age / (60 * 60 * 1000);
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// time decay factor
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const f = 1.3;
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// use baseScore if defined, if not just use 0
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const baseScore = item.baseScore || 0;
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// HN algorithm
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const newScore = Math.round((baseScore / Math.pow(ageInHours + 2, f))*1000000)/1000000;
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return newScore;
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} else {
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return item.baseScore;
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}
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};
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