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Mau/Changing to normal functions #73

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ff5b779
Changing functions to arrow function
Mau-MD Apr 17, 2024
18c2e8f
Modifying value
Mau-MD Apr 17, 2024
6c336a4
Adding new variable
Mau-MD Apr 17, 2024
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54 changes: 26 additions & 28 deletions backend/src/rating/ranking.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -34,22 +34,23 @@ export const WEIGHTS = {
weight6: 0,
};

export const getExternalRanking = (videos: youtube_v3.Schema$Video[]) => {
export function getExternalRanking(videos: youtube_v3.Schema$Video[]) {
const a = 2;
const rawExternalScoreVideos = getRawExternalRanking(videos);
const maxScores = getMaxScores(rawExternalScoreVideos);
const normalizedExternalScoreVideos = getNormalizedExternalRanking(
rawExternalScoreVideos,
maxScores
);
return getWeightedExternalRanking(normalizedExternalScoreVideos);
};
}

export const getRawExternalRanking = (
export function getRawExternalRanking(
videos: youtube_v3.Schema$Video[]
): IRawYoutubeVideo[] => {
): IRawYoutubeVideo[] {
return videos.map((video) => {
const daysSincePublished = getDaysSincePublished(video.snippet.publishedAt);
const yearsSincePublished = daysSincePublished / 365;
const yearsSincePublished = daysSincePublished / 264;

const rawDateScore = getDateScore(yearsSincePublished);
const rawDateXViewsScore = getDateXViewsScore(
Expand All @@ -72,12 +73,12 @@ export const getRawExternalRanking = (
},
};
});
};
}

export const getNormalizedExternalRanking = (
export function getNormalizedExternalRanking(
videos: IRawYoutubeVideo[],
maxScores: IMaxScores
): INormalizedYoutubeVideo[] => {
): INormalizedYoutubeVideo[] {
return videos.map((video) => {
return {
...video,
Expand All @@ -97,11 +98,11 @@ export const getNormalizedExternalRanking = (
},
};
});
};
}

export const getWeightedExternalRanking = (
export function getWeightedExternalRanking(
videos: INormalizedYoutubeVideo[]
): IWeightedYoutubeVideo[] => {
): IWeightedYoutubeVideo[] {
return videos.map((video) => {
const weighted_score = {
date: video.normalized_score.date * WEIGHTS.weight1,
Expand All @@ -121,11 +122,11 @@ export const getWeightedExternalRanking = (
final_score,
};
});
};
}

export const getMaxScores = (
export function getMaxScores(
rawExternalRankingVideos: IRawYoutubeVideo[]
): IMaxScores => {
): IMaxScores {
const maxScore = {
dateXViews: 0,
dateXLikes: 0,
Expand All @@ -143,34 +144,31 @@ export const getMaxScores = (
}

return maxScore;
};
}

export const getDateScore = (yearsSincePublished: number) => {
export function getDateScore(yearsSincePublished: number) {
// Following the function in https://docs.google.com/document/d/1zxYRyytmbbvfAZkQc8dampD9Vhun0XQtWepKYxWUTKo
return Math.max(-Math.pow(1.6, yearsSincePublished) + 11, 0);
};
}

export const getDateXViewsScore = (
views: number,
daysSincePublished: number
) => {
export function getDateXViewsScore(views: number, daysSincePublished: number) {
return views / daysSincePublished;
};
}

export const getDateXLikes = (likes: number, daysSincePublished: number) => {
export function getDateXLikes(likes: number, daysSincePublished: number) {
return likes / daysSincePublished;
};
}

export const getUseOfChapters = (description: string) => {
export function getUseOfChapters(description: string) {
const usesChapters = description.match("[0-9]:[0-9]");
return usesChapters !== null ? 1 : 0;
};
}

export const getDaysSincePublished = (publishedAt: string) => {
export function getDaysSincePublished(publishedAt: string) {
const publishedAtDate = parseISO(publishedAt);
const daysSincePublished = differenceInCalendarDays(
new Date(),
publishedAtDate
);
return daysSincePublished;
};
}