Implement recent commits graph (#29210)

This is the implementation of Recent Commits page. This feature was
mentioned on #18262.

It adds another tab to Activity page called Recent Commits. Recent
Commits tab shows number of commits since last year for the repository.

web_src/js/components/RepoRecentCommits.vue

@@ -0,0 +1,149 @@
+<script>
+import {SvgIcon} from '../svg.js';
+import {
+  Chart,
+  Tooltip,
+  BarElement,
+  LinearScale,
+  TimeScale,
+} from 'chart.js';
+import {GET} from '../modules/fetch.js';
+import {Bar} from 'vue-chartjs';
+import {
+  startDaysBetween,
+  firstStartDateAfterDate,
+  fillEmptyStartDaysWithZeroes,
+} from '../utils/time.js';
+import {chartJsColors} from '../utils/color.js';
+import {sleep} from '../utils.js';
+import 'chartjs-adapter-dayjs-4/dist/chartjs-adapter-dayjs-4.esm';
+
+const {pageData} = window.config;
+
+Chart.defaults.color = chartJsColors.text;
+Chart.defaults.borderColor = chartJsColors.border;
+
+Chart.register(
+  TimeScale,
+  LinearScale,
+  BarElement,
+  Tooltip,
+);
+
+export default {
+  components: {Bar, SvgIcon},
+  props: {
+    locale: {
+      type: Object,
+      required: true
+    },
+  },
+  data: () => ({
+    isLoading: false,
+    errorText: '',
+    repoLink: pageData.repoLink || [],
+    data: [],
+  }),
+  mounted() {
+    this.fetchGraphData();
+  },
+  methods: {
+    async fetchGraphData() {
+      this.isLoading = true;
+      try {
+        let response;
+        do {
+          response = await GET(`${this.repoLink}/activity/recent-commits/data`);
+          if (response.status === 202) {
+            await sleep(1000); // wait for 1 second before retrying
+          }
+        } while (response.status === 202);
+        if (response.ok) {
+          const data = await response.json();
+          const start = Object.values(data)[0].week;
+          const end = firstStartDateAfterDate(new Date());
+          const startDays = startDaysBetween(new Date(start), new Date(end));
+          this.data = fillEmptyStartDaysWithZeroes(startDays, data).slice(-52);
+          this.errorText = '';
+        } else {
+          this.errorText = response.statusText;
+        }
+      } catch (err) {
+        this.errorText = err.message;
+      } finally {
+        this.isLoading = false;
+      }
+    },
+
+    toGraphData(data) {
+      return {
+        datasets: [
+          {
+            data: data.map((i) => ({x: i.week, y: i.commits})),
+            label: 'Commits',
+            backgroundColor: chartJsColors['commits'],
+            borderWidth: 0,
+            tension: 0.3,
+          },
+        ],
+      };
+    },
+
+    getOptions() {
+      return {
+        responsive: true,
+        maintainAspectRatio: false,
+        animation: true,
+        scales: {
+          x: {
+            type: 'time',
+            grid: {
+              display: false,
+            },
+            time: {
+              minUnit: 'week',
+            },
+            ticks: {
+              maxRotation: 0,
+              maxTicksLimit: 52
+            },
+          },
+          y: {
+            ticks: {
+              maxTicksLimit: 6
+            },
+          },
+        },
+      };
+    },
+  },
+};
+</script>
+<template>
+  <div>
+    <div class="ui header gt-df gt-ac gt-sb">
+      {{ isLoading ? locale.loadingTitle : errorText ? locale.loadingTitleFailed: "Number of commits in the past year" }}
+    </div>
+    <div class="gt-df ui segment main-graph">
+      <div v-if="isLoading || errorText !== ''" class="gt-tc gt-m-auto">
+        <div v-if="isLoading">
+          <SvgIcon name="octicon-sync" class="gt-mr-3 job-status-rotate"/>
+          {{ locale.loadingInfo }}
+        </div>
+        <div v-else class="text red">
+          <SvgIcon name="octicon-x-circle-fill"/>
+          {{ errorText }}
+        </div>
+      </div>
+      <Bar
+        v-memo="data" v-if="data.length !== 0"
+        :data="toGraphData(data)" :options="getOptions()"
+      />
+    </div>
+  </div>
+</template>
+<style scoped>
+.main-graph {
+  height: 250px;
+}
+</style>

web_src/js/features/recent-commits.js

@@ -0,0 +1,21 @@
+import {createApp} from 'vue';
+
+export async function initRepoRecentCommits() {
+  const el = document.getElementById('repo-recent-commits-chart');
+  if (!el) return;
+
+  const {default: RepoRecentCommits} = await import(/* webpackChunkName: "recent-commits-graph" */'../components/RepoRecentCommits.vue');
+  try {
+    const View = createApp(RepoRecentCommits, {
+      locale: {
+        loadingTitle: el.getAttribute('data-locale-loading-title'),
+        loadingTitleFailed: el.getAttribute('data-locale-loading-title-failed'),
+        loadingInfo: el.getAttribute('data-locale-loading-info'),
+      }
+    });
+    View.mount(el);
+  } catch (err) {
+    console.error('RepoRecentCommits failed to load', err);
+    el.textContent = el.getAttribute('data-locale-component-failed-to-load');
+  }
+}

web_src/js/index.js

@@ -85,6 +85,7 @@ import {initRepoIssueList} from './features/repo-issue-list.js';
 import {initCommonIssueListQuickGoto} from './features/common-issue-list.js';
 import {initRepoContributors} from './features/contributors.js';
 import {initRepoCodeFrequency} from './features/code-frequency.js';
+import {initRepoRecentCommits} from './features/recent-commits.js';
 import {initRepoDiffCommitBranchesAndTags} from './features/repo-diff-commit.js';
 import {initDirAuto} from './modules/dirauto.js';
 
@@ -176,6 +177,7 @@ onDomReady(() => {
   initRepositoryActionView();
   initRepoContributors();
   initRepoCodeFrequency();
+  initRepoRecentCommits();
 
   initCommitStatuses();
   initCaptcha();