Coach accessibility improvements

kolibri/core/package.json

@@ -21,7 +21,7 @@
     "js-cookie": "^3.0.1",
     "knuth-shuffle-seeded": "^1.0.6",
     "kolibri-constants": "0.1.42",
-    "kolibri-design-system": "https://github.com/learningequality/kolibri-design-system#4b8f272d37446ff0e65c4048c0339e279976103b",
+    "kolibri-design-system": "https://github.com/learningequality/kolibri-design-system#a671f6f898eef07a3167dc74648ef329f8e3af44",
     "lockr": "0.8.5",
     "lodash": "^4.17.21",
     "loglevel": "^1.8.1",

kolibri/plugins/coach/assets/src/composables/useCoachTabs.js

@@ -0,0 +1,83 @@
+/**
+ * Provides a place to store last tabs interaction
+ * and helper methods to save and retrieve it.
+ * This information is typically used to find out
+ * if a tab was clicked recently so that we can decide
+ * on whether we should programatically re-focus it after
+ * navigating to a page.
+ *
+ * Motivation: Our routing architecture where parts of a page
+ * containing tabs get reloaded on route change would result
+ * in losing focus from the active tab. Therefore, we need
+ * to programatically re-focus after components are mounted again.
+ * However, for that we need to be able to estimate when navigation
+ * occured as a result of user interaction with tabs because in other
+ * cases focus shouldn't be manipulated (e.g. when visiting a page for
+ * the first time before clicking on tabs) .
+ *
+ * Usage: When tabs are clicked, save that interaction by calling `saveTabsClick`.
+ * Then when you need find out if tabs were clicked recently,
+ * call `wereTabsClickedRecently`.
+ */
+import { reactive } from 'kolibri.lib.vueCompositionApi';
+
+// tabs interaction is considered to be recent
+// when it's not older than ...
+const RECENT_INTERACTION_LIMIT_IN_MS = 3000;
+const TabsEvents = {
+  CLICK: 'click',
+};
+
+/**
+ * Needs to be placed outside of the `useCoachTabs`
+ * function so that it behaves like global state.
+ * Why: Due to our routing structure, tab components are re-mounted
+ * after a tab is clicked. Without placing this state outside, it would
+ * be lost as components that use this composable are initialized again.
+ */
+const lastTabsInteraction = reactive({
+  tabsInterfaceId: '',
+  event: '',
+  timestamp: '',
+});
+
+export function useCoachTabs() {
+  /**
+   * Stores an interaction with tabs
+   *
+   * @param {String} tabsInterfaceId ID of a tabbed interface interacted with
+   * @param {String} event An event kind. Available kinds: 'click'
+   */
+  function saveTabsInteraction(tabsInterfaceId, event) {
+    lastTabsInteraction.tabsInterfaceId = tabsInterfaceId;
+    lastTabsInteraction.event = event;
+    lastTabsInteraction.timestamp = Date.now();
+  }
+
+  /**
+   * Stores a click interaction with tabs
+   *
+   * @param {String} tabsInterfaceId ID of a tabbed interface interacted with
+   */
+  function saveTabsClick(tabsInterfaceId) {
+    saveTabsInteraction(tabsInterfaceId, TabsEvents.CLICK);
+  }
+
+  /**
+   * @param {String} tabsInterfaceId ID of a tabbed interface
+   * @returns {Boolean} `true` when tabs with the provided ID were
+   *                    clicked recently
+   */
+  function wereTabsClickedRecently(tabsInterfaceId) {
+    if (lastTabsInteraction.tabsInterfaceId !== tabsInterfaceId) {
+      return false;
+    }
+    const diff = Math.abs(Date.now() - lastTabsInteraction.timestamp);
+    return diff < RECENT_INTERACTION_LIMIT_IN_MS;
+  }
+
+  return {
+    saveTabsClick,
+    wereTabsClickedRecently,
+  };
+}

kolibri/plugins/coach/assets/src/constants/tabsConstants.js

@@ -0,0 +1,21 @@
+export const REPORTS_TABS_ID = 'coachReports';
+export const ReportsTabs = {
+  LESSONS: 'tabLessons',
+  QUIZZES: 'tabQuizzes',
+  GROUPS: 'tabGroups',
+  LEARNERS: 'tabLearners',
+};
+
+export const PLAN_TABS_ID = 'coachPlan';
+export const PlanTabs = {
+  LESSONS: 'tabLessons',
+  QUIZZES: 'tabQuizzes',
+  GROUPS: 'tabGroups',
+};
+
+export const REPORTS_GROUP_TABS_ID = 'coachPlanGroup';
+export const ReportsGroupTabs = {
+  REPORTS: 'tabReports',
+  MEMBERS: 'tabMembers',
+  ACTIVITY: 'tabActivity',
+};