New top language algorithm implementation (#1732)

* Reduced vercel maxDuration

* Implemented new algorithm for Top Langs

* Revert "Reduced vercel maxDuration"

This reverts commit b0bc626efe12c738cf5005e7f11c7d2a07b6387a.

* Added documentation

* Fixed broken implementation

* Update fetchTopLanguages.test.js

Changed tests

* Now uses the general formula

The parameters p and q can be set by the user.

* Updated tests and added new test

* Added new test

New test for order by repo count.

* Updated documentation

Added explanation and examples for new options.

* Updated documentation

This was overwritten in the merge commit.

* docs: improve docs and fix tests

* Renamed parameters

Renamed `p` and `q` to `size_weight` and `count_weight`, respectively.

* Updated the documentation

Changes introduced in f2516d60a4

---------

Co-authored-by: rickstaa <rick.staa@outlook.com>

tests/fetchTopLanguages.test.js

@@ -60,20 +60,22 @@ const error = {
 };
 
 describe("FetchTopLanguages", () => {
-  it("should fetch correct language data", async () => {
+  it("should fetch correct language data while using the new calculation", async () => {
     mock.onPost("https://api.github.com/graphql").reply(200, data_langs);
 
-    let repo = await fetchTopLanguages("anuraghazra");
+    let repo = await fetchTopLanguages("anuraghazra", [], 0.5, 0.5);
     expect(repo).toStrictEqual({
       HTML: {
         color: "#0f0",
+        count: 2,
         name: "HTML",
-        size: 200,
+        size: 20.000000000000004,
       },
       javascript: {
         color: "#0ff",
+        count: 2,
         name: "javascript",
-        size: 200,
+        size: 20.000000000000004,
       },
     });
   });
@@ -85,17 +87,59 @@ describe("FetchTopLanguages", () => {
     expect(repo).toStrictEqual({
       HTML: {
         color: "#0f0",
+        count: 1,
         name: "HTML",
         size: 100,
       },
       javascript: {
         color: "#0ff",
+        count: 2,
         name: "javascript",
         size: 200,
       },
     });
   });
 
+  it("should fetch correct language data while using the old calculation", async () => {
+    mock.onPost("https://api.github.com/graphql").reply(200, data_langs);
+
+    let repo = await fetchTopLanguages("anuraghazra", [], 1, 0);
+    expect(repo).toStrictEqual({
+      HTML: {
+        color: "#0f0",
+        count: 2,
+        name: "HTML",
+        size: 200,
+      },
+      javascript: {
+        color: "#0ff",
+        count: 2,
+        name: "javascript",
+        size: 200,
+      },
+    });
+  });
+
+  it("should rank languages by the number of repositories they appear in", async () => {
+    mock.onPost("https://api.github.com/graphql").reply(200, data_langs);
+
+    let repo = await fetchTopLanguages("anuraghazra", [], 0, 1);
+    expect(repo).toStrictEqual({
+      HTML: {
+        color: "#0f0",
+        count: 2,
+        name: "HTML",
+        size: 2,
+      },
+      javascript: {
+        color: "#0ff",
+        count: 2,
+        name: "javascript",
+        size: 2,
+      },
+    });
+  });
+
   it("should throw error", async () => {
     mock.onPost("https://api.github.com/graphql").reply(200, error);