Implement the emails for course run change states.

Adding templates and email functionality.

ECOM-6004

course_discovery/apps/publisher/emails.py

+import logging
+
+from django.conf import settings
+from django.contrib.sites.models import Site
+from django.core.mail.message import EmailMultiAlternatives
+from django.core.urlresolvers import reverse
+from django.template.loader import get_template
+from django.utils.translation import ugettext_lazy as _
+
+
+log = logging.getLogger(__name__)
+
+
+def send_email_for_change_state(course_run):
+    """ Send the emails for a comment.
+
+        Arguments:
+            course_run (Object): CourseRun object
+    """
+
+    try:
+        txt_template = 'publisher/email/change_state.txt'
+        html_template = 'publisher/email/change_state.html'
+
+        to_addresses = course_run.course.get_group_users_emails()
+        from_address = settings.PUBLISHER_FROM_EMAIL
+        page_path = reverse('publisher:publisher_course_run_detail', kwargs={'pk': course_run.id})
+        context = {
+            'state_name': course_run.current_state,
+            'course_run_page_url': 'https://{host}{path}'.format(
+                host=Site.objects.get_current().domain.strip('/'), path=page_path
+            )
+        }
+        template = get_template(txt_template)
+        plain_content = template.render(context)
+        template = get_template(html_template)
+        html_content = template.render(context)
+
+        subject = _('Course Run {title}-{pacing_type}-{start} state has been changed.').format(
+            title=course_run.course.title,
+            pacing_type=course_run.get_pacing_type_display(),
+            start=course_run.start.strftime('%B %d, %Y') if course_run.start else ''
+        )
+
+        email_msg = EmailMultiAlternatives(
+            subject, plain_content, from_address, to_addresses
+        )
+        email_msg.attach_alternative(html_content, 'text/html')
+        email_msg.send()
+    except Exception:  # pylint: disable=broad-except
+        log.exception('Failed to send email notifications for change state of course-run %s', course_run.id)

course_discovery/apps/publisher/models.py

 import logging
-from django.core.urlresolvers import reverse
 
+from django.core.urlresolvers import reverse
 from django.db import models
 from django.db.models.signals import pre_save
 from django.dispatch import receiver
@@ -12,12 +12,14 @@ from simple_history.models import HistoricalRecords
 from sortedm2m.fields import SortedManyToManyField
 from stdimage.models import StdImageField
 from taggit.managers import TaggableManager
+import waffle
 
 from course_discovery.apps.core.models import User, Currency
 from course_discovery.apps.course_metadata.choices import CourseRunPacing
 from course_discovery.apps.course_metadata.models import LevelType, Subject, Person, Organization
 from course_discovery.apps.course_metadata.utils import UploadToFieldNamePath
 from course_discovery.apps.ietf_language_tags.models import LanguageTag
+from course_discovery.apps.publisher.emails import send_email_for_change_state
 
 logger = logging.getLogger(__name__)
 
@@ -277,6 +279,9 @@ class CourseRun(TimeStampedModel, ChangedByMixin):
 
         self.state.save()
 
+        if waffle.switch_is_active('enable_publisher_email_notifications'):
+            send_email_for_change_state(self)
+
     @property
     def current_state(self):
         return self.state.get_name_display()

course_discovery/apps/publisher/tests/test_emails.py

+# pylint: disable=no-member
+import datetime
+import ddt
+from django.conf import settings
+from django.contrib.sites.models import Site
+from django.core.urlresolvers import reverse
+from django.test import TestCase
+from django.core import mail
+from guardian.shortcuts import assign_perm
+import pytz
+import mock
+
+from course_discovery.apps.core.tests.factories import UserFactory
+from course_discovery.apps.course_metadata.tests import toggle_switch
+from course_discovery.apps.publisher.models import State, Course
+from course_discovery.apps.publisher.tests import factories
+from course_discovery.apps.publisher.tests.factories import UserAttributeFactory
+
+
+@ddt.ddt
+class StateChangeEmailTests(TestCase):
+    """ Tests for the Email functionality for course run state changes. """
+
+    @classmethod
+    def setUpClass(cls):
+        super(StateChangeEmailTests, cls).setUpClass()
+        cls.user = UserFactory()
+        cls.user_2 = UserFactory()
+        cls.user_3 = UserFactory()
+
+        cls.site = Site.objects.get(pk=settings.SITE_ID)
+
+        cls.group = factories.GroupFactory()
+        cls.user.groups.add(cls.group)
+        cls.user_2.groups.add(cls.group)
+        cls.user_3.groups.add(cls.group)
+
+        cls.seat = factories.SeatFactory()
+        cls.course_run = cls.seat.course_run
+        cls.course = cls.course_run.course
+
+        assign_perm(Course.VIEW_PERMISSION, cls.group, cls.course)
+
+        # NOTE: We intentionally do NOT create an attribute for user_2.
+        # By default this user WILL receive email notifications.
+
+        UserAttributeFactory(user=cls.user, enable_email_notification=True)
+        UserAttributeFactory(user=cls.user_3, enable_email_notification=False)
+
+        toggle_switch('enable_publisher_email_notifications', True)
+
+    @mock.patch('course_discovery.apps.publisher.models.send_email_for_change_state')
+    def test_email_with_enable_waffle_switch(self, send_email_for_change_state):
+        """ Verify that send_email_for_state called with enable waffle switch.. """
+        self.course_run.change_state(target=State.DRAFT)
+        send_email_for_change_state.assert_called_once_with(self.course_run)
+
+    @mock.patch('course_discovery.apps.publisher.models.send_email_for_change_state')
+    def test_email_with_waffle_switch_disabled(self, send_email_for_change_state):
+        """ Verify that send_email_for_state not called with disable waffle switch.. """
+        toggle_switch('enable_publisher_email_notifications', False)
+        self.course_run.change_state(target=State.DRAFT)
+        send_email_for_change_state.assert_not_called()
+
+    def _assert_data(self):
+        """ DRY method to assert send email data"""
+        self.assertEqual([self.user.email, self.user_2.email], mail.outbox[0].to)
+
+        subject = 'Course Run {title}-{pacing_type}-{start} state has been changed.'.format(
+            title=self.course_run.course.title,
+            pacing_type=self.course_run.get_pacing_type_display(),
+            start=self.course_run.start.strftime("%B %d, %Y")
+        )
+        body = mail.outbox[0].body.strip()
+        self.assertEqual(
+            str(mail.outbox[0].subject),
+            subject
+        )
+        self.assertIn('Hi', body)
+        self.assertIn('The edX team', body)
+        'The following course run has been submitted for {{ state }}'.format(
+            state=self.course_run.state.name
+        )
+
+        page_path = reverse('publisher:publisher_course_run_detail', kwargs={'pk': self.course_run.id})
+        page_url = 'https://{host}{path}'.format(host=Site.objects.get_current().domain.strip('/'), path=page_path)
+        self.assertIn(page_url, body)
+
+    @ddt.data(
+        State.DRAFT, State.NEEDS_REVIEW, State.NEEDS_FINAL_APPROVAL,
+        State.FINALIZED, State.PUBLISHED, State.DRAFT
+    )
+    def test_email_without_group(self, target_state):
+        """ Verify that no email send if course group has no users. """
+        self.user.groups.remove(self.group)
+        self.user_2.groups.remove(self.group)
+        self.user_3.groups.remove(self.group)
+
+        self.course_run.change_state(target=target_state)
+        self.assertEqual(len(mail.outbox), 0)
+
+    @ddt.data(
+        State.DRAFT, State.NEEDS_REVIEW, State.NEEDS_FINAL_APPROVAL,
+        State.FINALIZED, State.PUBLISHED, State.DRAFT
+    )
+    def test_workflow_change_state_emails(self, target_state):
+        """ Verify that on each state change an email send to course group users. """
+        self.course_run.change_state(target=target_state)
+        self.assertEqual(len(mail.outbox), 1)
+        self._assert_data()
+
+    def test_email_without_start_date(self):
+        """ Verify that emails works properly even if course run does not have
+        start date.
+        """
+        self.course_run.start = None
+        self.course_run.save()
+        self.course_run.change_state(target=State.DRAFT)
+        self.assertEqual(len(mail.outbox), 1)
+
+        # add the start date again for other tests.
+        self.course_run.start = datetime.datetime.now(pytz.UTC)
+        self.course_run.save()

course_discovery/conf/locale/en/LC_MESSAGES/django.po

@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-10-25 21:30+0500\n"
+"POT-Creation-Date: 2016-10-28 14:40+0500\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -399,6 +399,11 @@ msgstr ""
 msgid "JSON string containing an elasticsearch function score config."
 msgstr ""
 
+#: apps/publisher/emails.py
+#, python-brace-format
+msgid "Course Run {title}-{pacing_type}-{start} state has been changed."
+msgstr ""
+
 #: apps/publisher/forms.py
 msgid "Yes"
 msgstr ""
@@ -1456,6 +1461,32 @@ msgstr ""
 msgid "Looks like you haven't publish a course yet"
 msgstr ""
 
+#: templates/publisher/email/change_state.html
+#: templates/publisher/email/change_state.txt
+msgid "Hi,"
+msgstr ""
+
+#: templates/publisher/email/change_state.html
+#: templates/publisher/email/change_state.txt
+#, python-format
+msgid "The following course run has been submitted for %(state_name)s."
+msgstr ""
+
+#: templates/publisher/email/change_state.html
+msgid "View Course"
+msgstr ""
+
+#: templates/publisher/email/change_state.html
+#: templates/publisher/email/change_state.txt
+#: templates/publisher/email/comment.html
+#: templates/publisher/email/comment.txt
+msgid "The edX team"
+msgstr ""
+
+#: templates/publisher/email/change_state.txt
+msgid "View Course:"
+msgstr ""
+
 #: templates/publisher/email/comment.html
 #: templates/publisher/email/comment.txt
 #, python-format
@@ -1468,13 +1499,8 @@ msgstr ""
 msgid "View comment"
 msgstr ""
 
-#: templates/publisher/email/comment.html
-#: templates/publisher/email/comment.txt
-msgid "The edX team"
-msgstr ""
-
 #: templates/publisher/email/comment.txt
-msgid "View comment:"
+msgid "View comment: "
 msgstr ""
 
 #: templates/publisher/seat_form.html

course_discovery/conf/locale/en/LC_MESSAGES/djangojs.po

@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-10-25 21:30+0500\n"
+"POT-Creation-Date: 2016-10-28 14:40+0500\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"

course_discovery/conf/locale/eo/LC_MESSAGES/django.po

@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-10-25 21:30+0500\n"
+"POT-Creation-Date: 2016-10-28 14:40+0500\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -494,6 +494,13 @@ msgstr ""
 "JSÖN strïng çöntäïnïng än élästïçséärçh fünçtïön sçöré çönfïg. Ⱡ'σяєм ιρѕυм "
 "∂σłσя ѕιт αмєт, ¢σηѕє¢тєтυя α#"
 
+#: apps/publisher/emails.py
+#, python-brace-format
+msgid "Course Run {title}-{pacing_type}-{start} state has been changed."
+msgstr ""
+"Çöürsé Rün {title}-{pacing_type}-{start} stäté häs ßéén çhängéd. Ⱡ'σяєм "
+"ιρѕυм ∂σłσя ѕιт αмєт, ¢σηѕє¢тєтυя α#"
+
 #: apps/publisher/forms.py
 msgid "Yes"
 msgstr "Ýés Ⱡ'σяєм#"
@@ -1696,6 +1703,34 @@ msgstr ""
 "Lööks lïké ýöü hävén't püßlïsh ä çöürsé ýét Ⱡ'σяєм ιρѕυм ∂σłσя ѕιт αмєт, "
 "¢σηѕє¢тєтυя #"
 
+#: templates/publisher/email/change_state.html
+#: templates/publisher/email/change_state.txt
+msgid "Hi,"
+msgstr "Hï, Ⱡ'σяєм#"
+
+#: templates/publisher/email/change_state.html
+#: templates/publisher/email/change_state.txt
+#, python-format
+msgid "The following course run has been submitted for %(state_name)s."
+msgstr ""
+"Thé föllöwïng çöürsé rün häs ßéén süßmïttéd för %(state_name)s. Ⱡ'σяєм ιρѕυм"
+" ∂σłσя ѕιт αмєт, ¢σηѕє¢тєтυя α#"
+
+#: templates/publisher/email/change_state.html
+msgid "View Course"
+msgstr "Vïéw Çöürsé Ⱡ'σяєм ιρѕυм ∂σłσя #"
+
+#: templates/publisher/email/change_state.html
+#: templates/publisher/email/change_state.txt
+#: templates/publisher/email/comment.html
+#: templates/publisher/email/comment.txt
+msgid "The edX team"
+msgstr "Thé édX téäm Ⱡ'σяєм ιρѕυм ∂σłσя ѕ#"
+
+#: templates/publisher/email/change_state.txt
+msgid "View Course:"
+msgstr "Vïéw Çöürsé: Ⱡ'σяєм ιρѕυм ∂σłσя ѕ#"
+
 #: templates/publisher/email/comment.html
 #: templates/publisher/email/comment.txt
 #, python-format
@@ -1710,14 +1745,9 @@ msgstr ""
 msgid "View comment"
 msgstr "Vïéw çömmént Ⱡ'σяєм ιρѕυм ∂σłσя ѕ#"
 
-#: templates/publisher/email/comment.html
-#: templates/publisher/email/comment.txt
-msgid "The edX team"
-msgstr "Thé édX téäm Ⱡ'σяєм ιρѕυм ∂σłσя ѕ#"
-
 #: templates/publisher/email/comment.txt
-msgid "View comment:"
-msgstr "Vïéw çömmént: Ⱡ'σяєм ιρѕυм ∂σłσя ѕι#"
+msgid "View comment: "
+msgstr "Vïéw çömmént:  Ⱡ'σяєм ιρѕυм ∂σłσя ѕιт#"
 
 #: templates/publisher/seat_form.html
 msgid "Seat Form"

course_discovery/conf/locale/eo/LC_MESSAGES/djangojs.po

@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-10-25 21:30+0500\n"
+"POT-Creation-Date: 2016-10-28 14:40+0500\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"

course_discovery/templates/publisher/email/change_state.html

+{% extends "publisher/email/email_base.html" %}
+{% load i18n %}
+
+{% block body %}
+<!-- Message Body -->
+        <p>{% trans "Hi," %}</p>
+
+        <p>
+           {% blocktrans trimmed %}
+                The following course run has been submitted for {{ state_name }}.
+           {% endblocktrans %}
+        </p>
+
+        <p>
+            <a href="{{ course_run_page_url }}">{% trans "View Course" %}</a>
+        </p>
+        <p>{% trans "The edX team" %}</p>
+<!-- End Message Body -->
+{% endblock body %}

course_discovery/templates/publisher/email/change_state.txt

+{% load i18n %}
+{% trans "Hi," %}
+
+{% blocktrans trimmed %}
+    The following course run has been submitted for {{ state_name }}.
+{% endblocktrans %}
+
+{% trans "View Course:" %} {{ course_run_page_url }}
+
+{% trans "The edX team" %}

course_discovery/templates/publisher/email/comment.txt

@@ -6,6 +6,6 @@
 
 {{ comment.comment }}
 
-{% trans "View comment:" %} {{ page_url }}
+{% trans "View comment: " %}{{ page_url }}
 
 {% trans "The edX team" %}