Brendon/gameyfin
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Update rating algorithm

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This commit is contained in:
grimsi
2025-09-04 18:19:22 +02:00
parent 183e1fc192
commit 24eacc0196
2 changed files with 33 additions and 15 deletions
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app/src/main/frontend/util/utils.ts
+27 -7
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@@ -241,6 +241,30 @@ function convertRange(value: number, originalRange: number[], targetRange: numbe
return (value - originalRange[0]) * (targetRange[1] - targetRange[0]) / (originalRange[1] - originalRange[0]) + targetRange[0];
}
/**
* Calculate a compound rating for a GameDto based on its criticRating and userRating.
* If both ratings are present, a weighted average is calculated (40% critic, 60% user).
* If only one rating is present, that rating is returned.
* If neither rating is present, 0 is returned.
* @param game The GameDto object containing the ratings.
* @returns The compound rating as a number between 0 and 100.
*/
export function compoundRating(game: GameDto): number {
const weights = {
critic: 0.4,
user: 0.6
};
const criticRating = game.criticRating ?? 0;
const userRating = game.userRating ?? 0;
if (criticRating === 0 && userRating === 0) return 0;
if (criticRating === 0) return userRating;
if (userRating === 0) return criticRating;
return Math.round((criticRating * weights.critic + userRating * weights.user) * 10) / 10;
}
/**
* Convert a GameDto's ratings to a star rating out of 5.
* If both criticRating and userRating are present, their average is taken.
@@ -249,15 +273,11 @@ function convertRange(value: number, originalRange: number[], targetRange: numbe
* @returns A string representing the star rating out of 5, or "N/A" if no ratings are available.
*/
export function gameRatingInStars(game: GameDto) {
if (!game.criticRating && !game.userRating) return "N/A";
const originalRange = [0, 100];
const starRange = [1, 5];
const ratings = [];
if (game.criticRating) ratings.push(game.criticRating);
if (game.userRating) ratings.push(game.userRating);
const avgRating = ratings.reduce((a, b) => a + b, 0) / ratings.length;
const rating = compoundRating(game);
if (rating === 0) return "N/A";
return convertRange(avgRating, originalRange, starRange).toFixed(1);
return convertRange(rating, originalRange, starRange).toFixed(1);
}