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https://github.com/krawieck/lemmur/
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22 lines
705 B
Dart
22 lines
705 B
Dart
import 'dart:math' show log, max, pow, ln10;
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import 'package:lemmy_api_client/lemmy_api_client.dart';
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/// Calculates hot rank
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/// because API always claims it's `0`
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/// and web version of lemmy also calculates it when loading comments
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///
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/// implementation taken from here:
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/// https://github.com/LemmyNet/lemmy/blob/main/ui/src/utils.ts#L182-L203
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double _calculateHotRank(int score, DateTime time) {
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log10(num x) => log(x) / ln10;
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final elapsed = (time.difference(DateTime.now()).inMilliseconds).abs() / 36e5;
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return (10000 * log10(max(1, 3 + score))) / pow(elapsed + 2, 1.8);
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}
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extension CommentHotRank on CommentView {
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double get computedHotRank => _calculateHotRank(score, published);
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}
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