[MM-P2P] optimizely experiment overrides for course_home (#364)

* alert override

* course home date overrides

* add undefined check for experiment hook

* inject intl rather than passing

src/alerts/access-expiration-alert/AccessExpirationAlert.jsx

@@ -1,4 +1,4 @@
-import React from 'react';
+import React, { useState } from 'react';
 import PropTypes from 'prop-types';
 import {
   FormattedMessage, FormattedDate, injectIntl, intlShape,
@@ -7,8 +7,18 @@ import { Hyperlink } from '@edx/paragon';
 
 import { Alert, ALERT_TYPES } from '../../generic/user-messages';
 import messages from './messages';
+import AccessExpirationAlertMMP2P from './AccessExpirationAlertMMP2P';
 
 function AccessExpirationAlert({ intl, payload }) {
+  /** [MM-P2P] Experiment */
+  const [showMMP2P, setShowMMP2P] = useState(!!window.experiment__home_alert_bShowMMP2P);
+  if (window.experiment__home_alert_showMMP2P === undefined) {
+    window.experiment__home_alert_showMMP2P = (val) => {
+      window.experiment__home_alert_bShowMMP2P = !!val;
+      setShowMMP2P(!!val);
+    };
+  }
+
   const {
     accessExpiration,
     userTimezone,
@@ -49,6 +59,13 @@ function AccessExpirationAlert({ intl, payload }) {
     );
   }
 
+  /** [MM-P2P] Experiment */
+  if (showMMP2P) {
+    return (
+      <AccessExpirationAlertMMP2P payload={payload} />
+    );
+  }
+
   let deadlineMessage = null;
   if (upgradeDeadline && upgradeUrl) {
     deadlineMessage = (

src/alerts/access-expiration-alert/AccessExpirationAlertMMP2P.jsx

@@ -0,0 +1,80 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { FormattedDate, injectIntl } from '@edx/frontend-platform/i18n';
+import { Hyperlink } from '@edx/paragon';
+
+import { Alert, ALERT_TYPES } from '../../generic/user-messages';
+import messages from './messages';
+
+function AccessExpirationAlertMMP2P({ payload }) {
+  const {
+    accessExpiration,
+    userTimezone,
+  } = payload;
+  const timezoneFormatArgs = userTimezone ? { timeZone: userTimezone } : {};
+
+  if (!accessExpiration) {
+    return null;
+  }
+
+  const {
+    expirationDate,
+    upgradeDeadline,
+    upgradeUrl,
+  } = accessExpiration;
+
+  let deadlineMessage = null;
+  const formatDate = (val, key) => (
+    <FormattedDate
+      key={`accessExpiration.${key}`}
+      day="numeric"
+      month="short"
+      year="numeric"
+      value={val}
+      {...timezoneFormatArgs}
+    />
+  );
+
+  if (upgradeDeadline && upgradeUrl) {
+    deadlineMessage = (
+      <>
+        Upgrade by {formatDate(upgradeDeadline, 'upgradeDesc')} to unlock unlimited access to all course activities, including graded assignments.
+        &nbsp;
+        <Hyperlink
+          className="font-weight-bold"
+          style={{ textDecoration: 'underline' }}
+          destination={upgradeUrl}
+        >
+          {messages.upgradeNow.defaultMessage}
+        </Hyperlink>
+      </>
+    );
+  }
+
+  return (
+    <Alert type={ALERT_TYPES.INFO}>
+      <span className="font-weight-bold">
+        Unlock full course content by {formatDate(upgradeDeadline, 'upgradeTitle')}
+      </span>
+      <br />
+      {deadlineMessage}
+      <br />
+      You lose all access to the first two weeks of scheduled content
+      on {formatDate(expirationDate, 'expirationBody')}.
+    </Alert>
+  );
+}
+
+AccessExpirationAlertMMP2P.propTypes = {
+  payload: PropTypes.shape({
+    accessExpiration: PropTypes.shape({
+      expirationDate: PropTypes.string.isRequired,
+      masqueradingExpiredCourse: PropTypes.bool.isRequired,
+      upgradeDeadline: PropTypes.string,
+      upgradeUrl: PropTypes.string,
+    }).isRequired,
+    userTimezone: PropTypes.string.isRequired,
+  }).isRequired,
+};
+
+export default injectIntl(AccessExpirationAlertMMP2P);