Misc JS linting and naming tweaks (#10652)

- lowercase all js filenames except Vue components
- enable new lint rules, mostly focused on shorter code
- autofix new lint violations
- apply misc transformations indexOf -> includes and onevent-> addEventListener

Co-authored-by: Antoine GIRARD <sapk@users.noreply.github.com>

web_src/js/features/userheatmap.js

@@ -0,0 +1,98 @@
+import Vue from 'vue';
+
+const {AppSubUrl, heatmapUser} = window.config;
+
+export default async function initHeatmap() {
+  const el = document.getElementById('user-heatmap');
+  if (!el) return;
+
+  const {CalendarHeatmap} = await import(/* webpackChunkName: "userheatmap" */'vue-calendar-heatmap');
+  Vue.component('calendarHeatmap', CalendarHeatmap);
+
+  const vueDelimeters = ['${', '}'];
+
+  Vue.component('activity-heatmap', {
+    delimiters: vueDelimeters,
+
+    props: {
+      user: {
+        type: String,
+        required: true
+      },
+      suburl: {
+        type: String,
+        required: true
+      },
+      locale: {
+        type: Object,
+        required: true
+      }
+    },
+
+    data() {
+      return {
+        isLoading: true,
+        colorRange: [],
+        endDate: null,
+        values: [],
+        totalContributions: 0,
+      };
+    },
+
+    mounted() {
+      this.colorRange = [
+        this.getColor(0),
+        this.getColor(1),
+        this.getColor(2),
+        this.getColor(3),
+        this.getColor(4),
+        this.getColor(5)
+      ];
+      this.endDate = new Date();
+      this.loadHeatmap(this.user);
+    },
+
+    methods: {
+      loadHeatmap(userName) {
+        const self = this;
+        $.get(`${this.suburl}/api/v1/users/${userName}/heatmap`, (chartRawData) => {
+          const chartData = [];
+          for (let i = 0; i < chartRawData.length; i++) {
+            self.totalContributions += chartRawData[i].contributions;
+            chartData[i] = {date: new Date(chartRawData[i].timestamp * 1000), count: chartRawData[i].contributions};
+          }
+          self.values = chartData;
+          self.isLoading = false;
+        });
+      },
+
+      getColor(idx) {
+        const el = document.createElement('div');
+        el.className = `heatmap-color-${idx}`;
+        document.body.appendChild(el);
+
+        const color = getComputedStyle(el).backgroundColor;
+
+        document.body.removeChild(el);
+
+        return color;
+      }
+    },
+
+    template: '<div><div v-show="isLoading"><slot name="loading"></slot></div><h4 class="total-contributions" v-if="!isLoading"><span v-html="totalContributions"></span> total contributions in the last 12 months</h4><calendar-heatmap v-show="!isLoading" :locale="locale" :no-data-text="locale.no_contributions" :tooltip-unit="locale.contributions" :end-date="endDate" :values="values" :range-color="colorRange"/></div>'
+  });
+
+  new Vue({
+    delimiters: vueDelimeters,
+    el,
+
+    data: {
+      suburl: AppSubUrl,
+      heatmapUser,
+      locale: {
+        contributions: 'contributions',
+        no_contributions: 'No contributions',
+      },
+    },
+  });
+}