Lower average stats and S+ threshold

anuraghazra · Jul 18, 2021 · 6ccab0a · 6ccab0a
1 parent 7a652bf
commit 6ccab0a
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Showing 2 changed files with 19 additions and 22 deletions.
diff --git a/src/calculateRank.js b/src/calculateRank.js
@@ -1,5 +1,5 @@
 function expsf(x, lambda=1.) {
-  return Math.exp(-lambda * x);
+  return 2 ** (-lambda * x);
 }
 
 function calculateRank({
@@ -11,45 +11,42 @@ function calculateRank({
   issues,
   stargazers,
 }) {
-  const REPOS_MEAN = 10, REPOS_WEIGHT = 0.125;
-  const COMMITS_MEAN = 1000, COMMITS_WEIGHT = 0.125;
+  const COMMITS_MEAN = 500, COMMITS_WEIGHT = 0.25;
   const FOLLOWERS_MEAN = 50, FOLLOWERS_WEIGHT = 0.5;
-  const PRS_ISSUES_MEAN = 50, PRS_ISSUES_WEIGHT = 0.25;
-  const STARS_MEAN = 100, STARS_WEIGHT = 1.0;
+  const PRS_ISSUES_MEAN = 25, PRS_ISSUES_WEIGHT = 0.25;
+  const STARS_MEAN = 50, STARS_WEIGHT = 1.0;
 
   const TOTAL_WEIGHT = (
-    REPOS_WEIGHT +
     COMMITS_WEIGHT +
     FOLLOWERS_WEIGHT +
     PRS_ISSUES_WEIGHT +
     STARS_WEIGHT
   );
 
   const rank = (
-    REPOS_WEIGHT * expsf(totalRepos, 1 / REPOS_MEAN) +
     COMMITS_WEIGHT * expsf(totalCommits, 1 / COMMITS_MEAN) +
     FOLLOWERS_WEIGHT * expsf(followers, 1 / FOLLOWERS_MEAN) +
     PRS_ISSUES_WEIGHT * expsf(prs + issues, 1 / PRS_ISSUES_MEAN) +
     STARS_WEIGHT * expsf(stargazers, 1 / STARS_MEAN)
   ) / TOTAL_WEIGHT;
 
-  const RANK_S_PLUS = 0.01;
+  const RANK_S_PLUS = 0.025;
   const RANK_S = 0.1;
   const RANK_A_PLUS = 0.25;
   const RANK_A = 0.50;
   const RANK_B_PLUS = 0.75;
 
   let level = "";
 
-  if (rank < RANK_S_PLUS)
+  if (rank <= RANK_S_PLUS)
     level = "S+";
-  else if (rank < RANK_S)
+  else if (rank <= RANK_S)
     level = "S";
-  else if (rank < RANK_A_PLUS)
+  else if (rank <= RANK_A_PLUS)
     level = "A+";
-  else if (rank < RANK_A)
+  else if (rank <= RANK_A)
     level = "A";
-  else if (rank < RANK_B_PLUS)
+  else if (rank <= RANK_B_PLUS)
     level = "B+";
   else
     level = "B";

diff --git a/tests/calculateRank.test.js b/tests/calculateRank.test.js
@@ -20,27 +20,27 @@ describe("Test calculateRank", () => {
     expect(
       calculateRank({
         totalRepos: 10,
-        totalCommits: 1000,
-        contributions: 1000,
+        totalCommits: 500,
+        contributions: 500,
         followers: 50,
-        prs: 25,
-        issues: 25,
-        stargazers: 100,
+        prs: 12,
+        issues: 13,
+        stargazers: 50,
       }),
-    ).toStrictEqual({"A", score: 36.787944117144235});
+    ).toStrictEqual({"A", score: 50.});
   });
 
-  it("Linus Torvalds gets S rank", () => {
+  it("Linus Torvalds gets S+ rank", () => {
     expect(
       calculateRank({
-        totalRepos: 4, // few repos
+        totalRepos: 4,
         totalCommits: 20000,
         contributions: 20000,
         followers: 132000,
         prs: 71,
         issues: 2,
         stargazers: 109100,
       }),
-    ).toStrictEqual({ level: "S", score: 7.092453734726941});
+    ).toStrictEqual({ level: "S+", score: 1.6515906883885256});
   });
 });