refactor: add perceptor tab and layout & relevant feature injection

src/feature-manager.ts

@@ -184,11 +184,11 @@ const add = async (
          */
         await sleep(10); // 10ms seems enough
       }
-      // if a feature doesn't exisit in DOM, try loading it since it might be expected in current page
+      // if a feature doesn't exist in DOM, try loading it since it might be expected in current page
       if (!exists(`#${id}`)) {
         setupPageLoad(id, details);
       } else {
-        // if already exisits, either it's not removed from DOM after a turbo:visit or the
+        // if already exists, either it's not removed from DOM after a turbo:visit or the
         // current visit is a restoration visit. For the second case, we should handle.
         if (restore && isRestorationVisit()) {
           restore();

src/helpers/should-feature-run.ts

@@ -17,7 +17,7 @@ export default async function shouldFeatureRun(
   } = props;
   return (
     (await Promise.all(asLongAs.map((c) => c())).then((flags) =>
-      flags.some((flag) => flag === true)
+      flags.every((flag) => flag === true)
     )) &&
     (await Promise.all(include.map((c) => c())).then((flags) =>
       flags.some((flag) => flag === true)

src/pages/ContentScripts/features/perceptor-layout/index.tsx

@@ -0,0 +1,39 @@
+import React from 'react';
+import $ from 'jquery';
+import elementReady from 'element-ready';
+import { render, Container } from 'react-dom';
+
+import features from '../../../../feature-manager';
+import { isPerceptor } from '../../../../utils/utils';
+import View from './view';
+
+const featureId = features.getFeatureID(import.meta.url);
+
+const renderTo = (container: Container) => {
+  render(<View />, container);
+};
+
+const init = async (): Promise<void> => {
+  // remove the original container
+  const parentContainer = await elementReady('#repo-content-turbo-frame');
+  $('h1.sr-only', parentContainer).text('Perceptor');
+
+  const perceptorLayoutContainer = $(
+    'div.clearfix.container-xl:first',
+    parentContainer
+  );
+  perceptorLayoutContainer.children('div').remove();
+
+  // create the new one: the percepter container
+  const percepterContainer = document.createElement('div');
+  percepterContainer.setAttribute('id', 'perceptor-layout');
+
+  renderTo(percepterContainer);
+  perceptorLayoutContainer.append(percepterContainer);
+};
+
+features.add(featureId, {
+  asLongAs: [isPerceptor],
+  awaitDomReady: false,
+  init,
+});

src/pages/ContentScripts/features/perceptor-layout/view.tsx

@@ -0,0 +1,15 @@
+import React from 'react';
+
+const View = (): JSX.Element => {
+  return (
+    <div
+      data-view-component="true"
+      className="Layout Layout--flowRow-until-md Layout--sidebarPosition-start Layout--sidebarPosition-flowRow-start Layout--sidebar-narrow"
+    >
+      <div data-view-component="true" className="Layout-sidebar"></div>
+      <div data-view-component="true" className="Layout-main"></div>
+    </div>
+  );
+};
+
+export default View;

src/pages/ContentScripts/features/perceptor-tab/icon-svg-path.ts

@@ -0,0 +1 @@
+export default '<path xmlns="http://www.w3.org/2000/svg" fill-rule="evenodd" d="M 14.253906 0 C 13.292969 0 12.507812 0.78125 12.507812 1.746094 C 12.507812 2.046875 12.585938 2.328125 12.71875 2.578125 L 9.859375 5.4375 C 9.464844 5.128906 8.972656 4.945312 8.4375 4.945312 C 7.898438 4.945312 7.40625 5.128906 7.011719 5.4375 L 4.78125 3.207031 C 4.882812 3.03125 4.945312 2.832031 4.945312 2.617188 C 4.945312 1.976562 4.421875 1.453125 3.78125 1.453125 C 3.140625 1.453125 2.617188 1.976562 2.617188 2.617188 C 2.617188 3.261719 3.140625 3.78125 3.78125 3.78125 C 3.996094 3.78125 4.195312 3.71875 4.371094 3.617188 L 6.601562 5.847656 C 6.292969 6.242188 6.109375 6.734375 6.109375 7.273438 C 6.109375 7.808594 6.292969 8.304688 6.601562 8.699219 L 2.917969 12.382812 C 2.605469 12.101562 2.195312 11.925781 1.746094 11.925781 C 0.78125 11.925781 0 12.710938 0 13.671875 C 0 14.636719 0.78125 15.417969 1.746094 15.417969 C 2.707031 15.417969 3.492188 14.636719 3.492188 13.671875 C 3.492188 13.371094 3.414062 13.089844 3.28125 12.839844 L 7.011719 9.109375 C 7.332031 9.359375 7.722656 9.527344 8.144531 9.578125 L 8.144531 12.535156 C 7.320312 12.675781 6.691406 13.390625 6.691406 14.253906 C 6.691406 15.21875 7.472656 16 8.4375 16 C 9.398438 16 10.183594 15.21875 10.183594 14.253906 C 10.183594 13.390625 9.550781 12.675781 8.726562 12.535156 L 8.726562 9.578125 C 9.152344 9.527344 9.539062 9.359375 9.863281 9.109375 L 12.09375 11.339844 C 11.988281 11.511719 11.925781 11.710938 11.925781 11.925781 C 11.925781 12.570312 12.449219 13.089844 13.089844 13.089844 C 13.734375 13.089844 14.253906 12.570312 14.253906 11.925781 C 14.253906 11.285156 13.734375 10.761719 13.089844 10.761719 C 12.875 10.761719 12.675781 10.828125 12.503906 10.929688 L 10.273438 8.699219 C 10.578125 8.304688 10.761719 7.808594 10.761719 7.273438 C 10.761719 6.734375 10.578125 6.242188 10.273438 5.847656 L 13.085938 3.035156 C 13.394531 3.316406 13.804688 3.492188 14.253906 3.492188 C 15.21875 3.492188 16 2.707031 16 1.746094 C 16 0.78125 15.21875 0 14.253906 0 Z M 3.199219 2.617188 C 3.199219 2.296875 3.460938 2.035156 3.78125 2.035156 C 4.101562 2.035156 4.363281 2.296875 4.363281 2.617188 C 4.363281 2.9375 4.101562 3.199219 3.78125 3.199219 C 3.460938 3.199219 3.199219 2.9375 3.199219 2.617188 Z M 1.746094 14.835938 C 1.105469 14.835938 0.582031 14.316406 0.582031 13.671875 C 0.582031 13.03125 1.105469 12.507812 1.746094 12.507812 C 2.386719 12.507812 2.910156 13.03125 2.910156 13.671875 C 2.910156 14.316406 2.386719 14.835938 1.746094 14.835938 Z M 9.601562 14.253906 C 9.601562 14.894531 9.078125 15.417969 8.4375 15.417969 C 7.792969 15.417969 7.273438 14.894531 7.273438 14.253906 C 7.273438 13.613281 7.792969 13.089844 8.4375 13.089844 C 9.078125 13.089844 9.601562 13.613281 9.601562 14.253906 Z M 8.4375 9.019531 C 7.472656 9.019531 6.691406 8.234375 6.691406 7.273438 C 6.691406 6.308594 7.472656 5.527344 8.4375 5.527344 C 9.398438 5.527344 10.183594 6.308594 10.183594 7.273438 C 10.183594 8.234375 9.398438 9.019531 8.4375 9.019531 Z M 13.671875 11.925781 C 13.671875 12.25 13.410156 12.507812 13.089844 12.507812 C 12.769531 12.507812 12.507812 12.25 12.507812 11.925781 C 12.507812 11.605469 12.769531 11.34375 13.089844 11.34375 C 13.410156 11.34375 13.671875 11.605469 13.671875 11.925781 Z M 14.253906 2.910156 C 13.613281 2.910156 13.089844 2.386719 13.089844 1.746094 C 13.089844 1.105469 13.613281 0.582031 14.253906 0.582031 C 14.894531 0.582031 15.417969 1.105469 15.417969 1.746094 C 15.417969 2.386719 14.894531 2.910156 14.253906 2.910156 Z M 14.253906 2.910156 "/>';

src/pages/ContentScripts/features/perceptor-tab/index.tsx

@@ -0,0 +1,97 @@
+import $ from 'jquery';
+import elementReady from 'element-ready';
+
+import iconSvgPath from './icon-svg-path';
+import features from '../../../../feature-manager';
+import { isPerceptor, isPublicRepo } from '../../../../utils/utils';
+import sleep from '../../../../helpers/sleep';
+
+const featureId = features.getFeatureID(import.meta.url);
+
+const addPerceptorTab = async (): Promise<void | false> => {
+  // the creation of the Perceptor tab is based on the Insights tab
+  const insightsTab = await elementReady(
+    'a.UnderlineNav-item[id="insights-tab"]',
+    { waitForChildren: false }
+  );
+  if (!insightsTab) {
+    // if the selector failed to find the Insights tab
+    return false;
+  }
+  const perceptorTab = insightsTab.cloneNode(true) as HTMLAnchorElement;
+  delete perceptorTab.dataset.selectedLinks;
+  const perceptorHref = `${insightsTab.href}?redirect=perceptor`;
+  perceptorTab.href = perceptorHref;
+  perceptorTab.id = featureId;
+  perceptorTab.setAttribute('data-tab-item', featureId);
+
+  const perceptorTitle = $('[data-content]', perceptorTab);
+  perceptorTitle.text('Perceptor').attr('data-content', 'Perceptor');
+
+  // slot for any future counter function
+  const perceptorCounter = $('[class=Counter]', perceptorTab);
+  perceptorCounter.attr('id', `${featureId}-count`);
+
+  // replace with the perceptor Icon
+  $('svg.octicon', perceptorTab).html(iconSvgPath);
+
+  // add the Perceptor tab to the tabs list
+  if (!insightsTab.parentElement) {
+    return false;
+  }
+  const tabContainer = document.createElement('li');
+  tabContainer.appendChild(perceptorTab);
+  tabContainer.setAttribute('data-view-component', 'true');
+  tabContainer.className = 'd-inline-flex';
+  insightsTab.parentElement.after(tabContainer);
+
+  // add to drop down menu (when the window is narrow enough some tabs are hidden into "···" menu)
+  const repoNavigationDropdown = await elementReady('.UnderlineNav-actions ul');
+  if (!repoNavigationDropdown) {
+    return false;
+  }
+  const insightsTabDataItem = $(
+    'li[data-menu-item$="insights-tab"]',
+    repoNavigationDropdown
+  );
+  const perceptorTabDataItem = insightsTabDataItem.clone(true);
+  perceptorTabDataItem.attr('data-menu-item', featureId);
+  perceptorTabDataItem.children('a').text('Perceptor').attr({
+    'data-selected-links': perceptorHref,
+    href: perceptorHref,
+  });
+  insightsTabDataItem.after(perceptorTabDataItem);
+
+  // Trigger a reflow to push the right-most tab into the overflow dropdown
+  window.dispatchEvent(new Event('resize'));
+};
+
+const updatePerceptorTabHighlighting = async (): Promise<void> => {
+  const insightsTab = $('#insights-tab');
+  const perceptorTab = $(`#${featureId}`);
+  // no operation needed
+  if (!isPerceptor()) return;
+  // if perceptor tab
+  const insightsTabSeletedLinks = insightsTab.attr('data-selected-links');
+  insightsTab.removeAttr('data-selected-links');
+  perceptorTab.attr('data-selected-links', 'pulse');
+  // should wait a short time for the host code to update the tab highlighting first
+  await sleep(10);
+  if (!insightsTabSeletedLinks) return;
+  insightsTab.attr('data-selected-links', insightsTabSeletedLinks);
+  perceptorTab.removeAttr('data-selected-links');
+};
+
+const init = async (): Promise<void> => {
+  await addPerceptorTab();
+  // add event listener to update tab highlighting at each turbo:load event
+  document.addEventListener('turbo:load', async () => {
+    await updatePerceptorTabHighlighting();
+  });
+};
+
+features.add(featureId, {
+  asLongAs: [isPublicRepo],
+  awaitDomReady: false,
+  init,
+});

src/pages/ContentScripts/index.ts

@@ -3,6 +3,8 @@ import './index.scss';
 import './features/repo-activity-openrank-trends';
 import './features/repo-fork-tooltip';
 import './features/repo-star-tooltip';
+import './features/perceptor-tab';
+import './features/perceptor-layout';
 
 /**
  * I infer that GitHub uses hotwired/turbo to speedup its SPA.