Revert "Merge pull request #14078 from edx/yro_remove-datetimetext-functions"

This reverts commit 8c0098812d, reversing
changes made to 5b6e2dd5ee.

openedx/core/djangoapps/content/course_overviews/models.py

@@ -9,6 +9,7 @@ from django.db import models, transaction
 from django.db.models.fields import BooleanField, DateTimeField, DecimalField, TextField, FloatField, IntegerField
 from django.db.utils import IntegrityError
 from django.template import defaultfilters
+from django.utils.translation import ugettext
 
 from ccx_keys.locator import CCXLocator
 from model_utils.models import TimeStampedModel
@@ -17,7 +18,9 @@ from opaque_keys.edx.keys import CourseKey
 from config_models.models import ConfigurationModel
 from lms.djangoapps import django_comment_client
 from openedx.core.djangoapps.models.course_details import CourseDetails
+from pytz import utc
 from static_replace.models import AssetBaseUrlConfig
+from util.date_utils import strftime_localized
 from xmodule import course_metadata_utils, block_metadata_utils
 from xmodule.course_module import CourseDescriptor, DEFAULT_START_DATE
 from xmodule.error_module import ErrorDescriptor
@@ -356,6 +359,21 @@ class CourseOverview(TimeStampedModel):
         """
         return course_metadata_utils.course_starts_within(self.start, days)
 
+    def start_datetime_text(self, format_string="SHORT_DATE", time_zone=utc):
+        """
+        Returns the desired text corresponding to the course's start date and
+        time in the specified time zone, or utc if no time zone given.
+        Prefers .advertised_start, then falls back to .start.
+        """
+        return course_metadata_utils.course_start_datetime_text(
+            self.start,
+            self.advertised_start,
+            format_string,
+            time_zone,
+            ugettext,
+            strftime_localized
+        )
+
     @property
     def start_date_is_still_default(self):
         """
@@ -367,6 +385,18 @@ class CourseOverview(TimeStampedModel):
             self.advertised_start,
         )
 
+    def end_datetime_text(self, format_string="SHORT_DATE", time_zone=utc):
+        """
+        Returns the end date or datetime for the course formatted as a string.
+
+        """
+        return course_metadata_utils.course_end_datetime_text(
+            self.end,
+            format_string,
+            time_zone,
+            strftime_localized
+        )
+
     @property
     def sorting_score(self):
         """

openedx/core/djangoapps/content/course_overviews/tests.py

@@ -127,6 +127,10 @@ class CourseOverviewTestCase(ModuleStoreTestCase):
             ('clean_id', ('#',)),
             ('has_ended', ()),
             ('has_started', ()),
+            ('start_datetime_text', ('SHORT_DATE',)),
+            ('start_datetime_text', ('DATE_TIME',)),
+            ('end_datetime_text', ('SHORT_DATE',)),
+            ('end_datetime_text', ('DATE_TIME',)),
             ('may_certify', ()),
         ]
         for method_name, method_args in methods_to_test: