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Ranking System v2 (anuraghazra#1186)
* Revise rank calculation * Replace contributions by commits * Lower average stats and S+ threshold * Fix calculateRank.test.js Missing key in dictionary constructor Co-authored-by: Rick Staa <rick.staa@outlook.com> * refactor: run prettier * feat: change star weight to 0.75 * Separate PRs and issues * Tweak weights * Add count_private back * fix: enable 'count_private' again * test: fix tests * refactor: improve code formatting * Higher targets --------- Co-authored-by: Rick Staa <rick.staa@outlook.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,105 +1,72 @@ | ||
| /** | ||
| * Calculates the probability of x taking on x or a value less than x in a normal distribution | ||
| * with mean and standard deviation. | ||
| * | ||
| * @see https://stackoverflow.com/a/5263759/10629172 | ||
| * | ||
| * @param {string} mean The mean of the normal distribution. | ||
| * @param {number} sigma The standard deviation of the normal distribution. | ||
| * @param {number} to The value to calculate the probability for. | ||
| * @returns {number} Probability. | ||
| */ | ||
| const normalcdf = (mean, sigma, to) => { | ||
| var z = (to - mean) / Math.sqrt(2 * sigma * sigma); | ||
| var t = 1 / (1 + 0.3275911 * Math.abs(z)); | ||
| var a1 = 0.254829592; | ||
| var a2 = -0.284496736; | ||
| var a3 = 1.421413741; | ||
| var a4 = -1.453152027; | ||
| var a5 = 1.061405429; | ||
| var erf = | ||
| 1 - ((((a5 * t + a4) * t + a3) * t + a2) * t + a1) * t * Math.exp(-z * z); | ||
| var sign = 1; | ||
| if (z < 0) { | ||
| sign = -1; | ||
| } | ||
| return (1 / 2) * (1 + sign * erf); | ||
| }; | ||
| function expsf(x, lambda = 1) { | ||
| return 2 ** (-lambda * x); | ||
| } | ||
|
|
||
| /** | ||
| * Calculates the users rank. | ||
| * | ||
| * @param {object} params Parameters on which the user's rank depends. | ||
| * @param {number} params.totalRepos Total number of repos. | ||
| * @param {number} params.totalCommits Total number of commits. | ||
| * @param {number} params.contributions The number of contributions. | ||
| * @param {number} params.followers The number of followers. | ||
| * @param {boolean} params.all_commits Whether `include_all_commits` was used. | ||
| * @param {number} params.commits Number of commits. | ||
| * @param {number} params.prs The number of pull requests. | ||
| * @param {number} params.issues The number of issues. | ||
| * @param {number} params.stargazers The number of stars. | ||
| * @param {number} params.repos Total number of repos. | ||
| * @param {number} params.stars The number of stars. | ||
| * @param {number} params.followers The number of followers. | ||
| * @returns {{level: string, score: number}}} The users rank. | ||
| */ | ||
| const calculateRank = ({ | ||
| totalRepos, | ||
| totalCommits, | ||
| contributions, | ||
| followers, | ||
| function calculateRank({ | ||
| all_commits, | ||
| commits, | ||
| prs, | ||
| issues, | ||
| stargazers, | ||
| }) => { | ||
| const COMMITS_OFFSET = 1.65; | ||
| const CONTRIBS_OFFSET = 1.65; | ||
| const ISSUES_OFFSET = 1; | ||
| const STARS_OFFSET = 0.75; | ||
| const PRS_OFFSET = 0.5; | ||
| const FOLLOWERS_OFFSET = 0.45; | ||
| const REPO_OFFSET = 1; | ||
|
|
||
| const ALL_OFFSETS = | ||
| CONTRIBS_OFFSET + | ||
| ISSUES_OFFSET + | ||
| STARS_OFFSET + | ||
| PRS_OFFSET + | ||
| FOLLOWERS_OFFSET + | ||
| REPO_OFFSET; | ||
|
|
||
| const RANK_S_VALUE = 1; | ||
| const RANK_DOUBLE_A_VALUE = 25; | ||
| const RANK_A2_VALUE = 45; | ||
| const RANK_A3_VALUE = 60; | ||
| const RANK_B_VALUE = 100; | ||
| repos, // unused | ||
| stars, | ||
| followers, | ||
| }) { | ||
| const COMMITS_MEAN = all_commits ? 1000 : 250, | ||
| COMMITS_WEIGHT = 2; | ||
| const PRS_MEAN = 50, | ||
| PRS_WEIGHT = 3; | ||
| const ISSUES_MEAN = 25, | ||
| ISSUES_WEIGHT = 1; | ||
| const STARS_MEAN = 250, | ||
| STARS_WEIGHT = 4; | ||
| const FOLLOWERS_MEAN = 25, | ||
| FOLLOWERS_WEIGHT = 1; | ||
|
|
||
| const TOTAL_VALUES = | ||
| RANK_S_VALUE + | ||
| RANK_DOUBLE_A_VALUE + | ||
| RANK_A2_VALUE + | ||
| RANK_A3_VALUE + | ||
| RANK_B_VALUE; | ||
| const TOTAL_WEIGHT = | ||
| COMMITS_WEIGHT + | ||
| PRS_WEIGHT + | ||
| ISSUES_WEIGHT + | ||
| STARS_WEIGHT + | ||
| FOLLOWERS_WEIGHT; | ||
|
|
||
| // prettier-ignore | ||
| const score = ( | ||
| totalCommits * COMMITS_OFFSET + | ||
| contributions * CONTRIBS_OFFSET + | ||
| issues * ISSUES_OFFSET + | ||
| stargazers * STARS_OFFSET + | ||
| prs * PRS_OFFSET + | ||
| followers * FOLLOWERS_OFFSET + | ||
| totalRepos * REPO_OFFSET | ||
| ) / 100; | ||
| const rank = | ||
| (COMMITS_WEIGHT * expsf(commits, 1 / COMMITS_MEAN) + | ||
| PRS_WEIGHT * expsf(prs, 1 / PRS_MEAN) + | ||
| ISSUES_WEIGHT * expsf(issues, 1 / ISSUES_MEAN) + | ||
| STARS_WEIGHT * expsf(stars, 1 / STARS_MEAN) + | ||
| FOLLOWERS_WEIGHT * expsf(followers, 1 / FOLLOWERS_MEAN)) / | ||
| TOTAL_WEIGHT; | ||
|
|
||
| const normalizedScore = normalcdf(score, TOTAL_VALUES, ALL_OFFSETS) * 100; | ||
| const RANK_S_PLUS = 0.025; | ||
| const RANK_S = 0.1; | ||
| const RANK_A_PLUS = 0.25; | ||
| const RANK_A = 0.5; | ||
| const RANK_B_PLUS = 0.75; | ||
|
|
||
| const level = (() => { | ||
| if (normalizedScore < RANK_S_VALUE) return "S+"; | ||
| if (normalizedScore < RANK_DOUBLE_A_VALUE) return "S"; | ||
| if (normalizedScore < RANK_A2_VALUE) return "A++"; | ||
| if (normalizedScore < RANK_A3_VALUE) return "A+"; | ||
| return "B+"; | ||
| if (rank <= RANK_S_PLUS) return "S+"; | ||
| if (rank <= RANK_S) return "S"; | ||
| if (rank <= RANK_A_PLUS) return "A+"; | ||
| if (rank <= RANK_A) return "A"; | ||
| if (rank <= RANK_B_PLUS) return "B+"; | ||
| return "B"; | ||
| })(); | ||
|
|
||
| return { level, score: normalizedScore }; | ||
| }; | ||
| return { level, score: rank * 100 }; | ||
| } | ||
|
|
||
| export { calculateRank }; | ||
| export default calculateRank; |
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