feat: add hard-coded course tabs (openedx#6)

* feat: add hard-coded course tabs

* fix: add key to course nav tabs

* refactor: split NavTab from CourseTabsNavigation

* refactor: alphabetize props

src/components/CourseTabsNavigation.jsx

@@ -0,0 +1,74 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
+import messages from './messages';
+import NavTab from './NavTab';
+
+function CourseTabsNavigation({ activeTabSlug, courseTabs, intl }) {
+  const courseNavTabs = courseTabs.map(({ slug, ...courseTab }) => (
+    <NavTab
+      isActive={slug === activeTabSlug}
+      key={slug}
+      {...courseTab}
+    />
+  ));
+
+  return (
+    <nav
+      aria-label={intl.formatMessage(messages['learn.navigation.course.tabs.label'])}
+      className="nav nav-underline-tabs"
+    >
+      {courseNavTabs}
+    </nav>
+  );
+}
+
+CourseTabsNavigation.propTypes = {
+  activeTabSlug: PropTypes.string,
+  courseTabs: PropTypes.arrayOf(PropTypes.shape({
+    title: PropTypes.string.isRequired,
+    priority: PropTypes.number.isRequired,
+    slug: PropTypes.string.isRequired,
+    url: PropTypes.string.isRequired,
+  })),
+  intl: intlShape.isRequired,
+};
+
+CourseTabsNavigation.defaultProps = {
+  activeTabSlug: undefined,
+  courseTabs: [
+    {
+      title: 'Course',
+      slug: 'course',
+      priority: 1,
+      url: 'http://localhost:18000/courses/course-v1:edX+DemoX+Demo_Course/course/',
+    },
+
+    {
+      title: 'Discussion',
+      slug: 'discussion',
+      priority: 2,
+      url: 'http://localhost:18000/courses/course-v1:edX+DemoX+Demo_Course/discussion/forum/',
+    },
+    {
+      title: 'Wiki',
+      slug: 'wiki',
+      priority: 3,
+      url: 'http://localhost:18000/courses/course-v1:edX+DemoX+Demo_Course/course_wiki',
+    },
+    {
+      title: 'Progress',
+      slug: 'progress',
+      priority: 4,
+      url: 'http://localhost:18000/courses/course-v1:edX+DemoX+Demo_Course/progress',
+    },
+    {
+      title: 'Instructor',
+      slug: 'instructor',
+      priority: 5,
+      url: 'http://localhost:18000/courses/course-v1:edX+DemoX+Demo_Course/instructor',
+    },
+  ],
+};
+
+export default injectIntl(CourseTabsNavigation);

src/components/NavTab.jsx

@@ -0,0 +1,30 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import classNames from 'classnames';
+
+
+export default function NavTab(props) {
+  const {
+    isActive, url, title, ...attrs
+  } = props;
+
+  const className = classNames(
+    'nav-item nav-link',
+    { active: isActive },
+    attrs.className,
+  );
+
+  return <a {...attrs} className={className} href={url}>{title}</a>;
+}
+
+NavTab.propTypes = {
+  className: PropTypes.string,
+  isActive: PropTypes.bool,
+  title: PropTypes.string.isRequired,
+  url: PropTypes.string.isRequired,
+};
+
+NavTab.defaultProps = {
+  className: undefined,
+  isActive: false,
+};

src/components/messages.js

@@ -0,0 +1,11 @@
+import { defineMessages } from '@edx/frontend-platform/i18n';
+
+const messages = defineMessages({
+  'learn.navigation.course.tabs.label': {
+    id: 'learn.navigation.course.tabs.label',
+    defaultMessage: 'Course Material',
+    description: 'The accessible label for course tabs navigation',
+  },
+});
+
+export default messages;

src/index.jsx

@@ -10,6 +10,7 @@ import Header, { messages as headerMessages } from '@edx/frontend-component-head
 import Footer, { messages as footerMessages } from '@edx/frontend-component-footer';
 
 import appMessages from './i18n';
+import CourseTabsNavigation from './components/CourseTabsNavigation';
 import LearningSequencePage from './learning-sequence/LearningSequencePage';
 
 import './index.scss';
@@ -19,6 +20,9 @@ subscribe(APP_READY, () => {
   ReactDOM.render(
     <AppProvider>
       <Header />
+      <div className="container pt-2">
+        <CourseTabsNavigation activeTabSlug="course" />
+      </div>
       <Switch>
         {/* Staging: course-v1:UBCx+Water201x_2+2T2015 */}
         <Route

src/index.scss

@@ -43,3 +43,18 @@
     flex: 0;
   }
 }
+
+.nav-underline-tabs {
+  .nav-link {
+    border-bottom: 4px solid transparent;
+    color: theme-color('gray', 700);
+
+    &:hover,
+    &:focus,
+    &.active {
+      font-weight: $font-weight-normal;
+      color: theme-color('primary', 500);
+      border-color: theme-color('primary', 500);
+    }
+  }
+}