Group repository contributors by email

This was changed because it seemed undesirable
to split chart when user changes git name.

Issue:
https://gitlab.com/gitlab-org/gitlab/issues/196961

app/assets/javascripts/contributors/components/contributors.vue

@@ -66,12 +66,12 @@ export default {
     individualChartsData() {
       const maxNumberOfIndividualContributorsCharts = 100;
 
-      return Object.keys(this.parsedData.byAuthor)
-        .map(name => {
-          const author = this.parsedData.byAuthor[name];
+      return Object.keys(this.parsedData.byAuthorEmail)
+        .map(email => {
+          const author = this.parsedData.byAuthorEmail[email];
           return {
-            name,
-            email: author.email,
+            name: author.name,
+            email,
             commits: author.commits,
             dates: [
               {

app/assets/javascripts/contributors/stores/getters.js

 export const showChart = state => Boolean(!state.loading && state.chartData);
 
 export const parsedData = state => {
-  const byAuthor = {};
+  const byAuthorEmail = {};
   const total = {};
 
   state.chartData.forEach(({ date, author_name, author_email }) => {
     total[date] = total[date] ? total[date] + 1 : 1;
 
-    const authorData = byAuthor[author_name];
+    const authorData = byAuthorEmail[author_email];
 
     if (!authorData) {
-      byAuthor[author_name] = {
-        email: author_email.toLowerCase(),
+      byAuthorEmail[author_email] = {
+        name: author_name,
         commits: 1,
         dates: {
           [date]: 1,
@@ -25,7 +25,7 @@ export const parsedData = state => {
 
   return {
     total,
-    byAuthor,
+    byAuthorEmail,
   };
 };
 

changelogs/unreleased/repository-contributors-group-by-email.yml

+---
+title: Group repository contributors by email instead of name
+merge_request: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/26899
+author: Hilco van der Wilk
+type: changed

spec/frontend/contributors/store/getters_spec.js

@@ -29,33 +29,39 @@ describe('Contributors Store Getters', () => {
 
       beforeAll(() => {
         state.chartData = [
+          { author_name: 'John Smith', author_email: 'jawnnypoo@gmail.com', date: '2019-05-05' },
           { author_name: 'John', author_email: 'jawnnypoo@gmail.com', date: '2019-05-05' },
-          { author_name: 'John', author_email: 'jawnnypoo@gmail.com', date: '2019-05-05' },
-          { author_name: 'Carlson', author_email: 'jawnnypoo@gmail.com', date: '2019-03-03' },
-          { author_name: 'Carlson', author_email: 'jawnnypoo@gmail.com', date: '2019-05-05' },
-          { author_name: 'John', author_email: 'jawnnypoo@gmail.com', date: '2019-04-04' },
+          { author_name: 'Carlson', author_email: 'carlson123@gitlab.com', date: '2019-03-03' },
+          { author_name: 'Carlson', author_email: 'carlson123@gmail.com', date: '2019-05-05' },
           { author_name: 'John', author_email: 'jawnnypoo@gmail.com', date: '2019-04-04' },
+          { author_name: 'Johan', author_email: 'jawnnypoo@gmail.com', date: '2019-04-04' },
           { author_name: 'John', author_email: 'jawnnypoo@gmail.com', date: '2019-03-03' },
         ];
         parsed = getters.parsedData(state);
       });
 
-      it('should group contributions by date ', () => {
+      it('should group contributions by date', () => {
         expect(parsed.total).toMatchObject({ '2019-05-05': 3, '2019-03-03': 2, '2019-04-04': 2 });
       });
 
-      it('should group contributions by author ', () => {
-        expect(parsed.byAuthor).toMatchObject({
-          Carlson: {
-            email: 'jawnnypoo@gmail.com',
-            commits: 2,
+      it('should group contributions by email and use most recent name', () => {
+        expect(parsed.byAuthorEmail).toMatchObject({
+          'carlson123@gmail.com': {
+            name: 'Carlson',
+            commits: 1,
             dates: {
-              '2019-03-03': 1,
               '2019-05-05': 1,
             },
           },
-          John: {
-            email: 'jawnnypoo@gmail.com',
+          'carlson123@gitlab.com': {
+            name: 'Carlson',
+            commits: 1,
+            dates: {
+              '2019-03-03': 1,
+            },
+          },
+          'jawnnypoo@gmail.com': {
+            name: 'John Smith',
             commits: 5,
             dates: {
               '2019-03-03': 1,