Adding datetime displays to assessment modules

Aside from properly displaying assessment due dates, also hiding the 'due' label when no due date is set for an assessment module

apps/openassessment/templates/openassessmentblock/peer/oa_peer_assessment.html

@@ -11,7 +11,9 @@
             <span class="step__counter"></span>
             <span class="wrapper--copy">
                 <span class="step__label">Assess Peers</span>
-                <span class="step__deadline">due <span class="date">{{ formatted_due_datetime }}</span></span>
+                {% if peer_due %}
+                <span class="step__deadline">due <span class="date">{{ peer_due }}</span></span>
+                {% endif %}
             </span>
         </h2>
 

apps/openassessment/templates/openassessmentblock/self/oa_self_assessment.html

@@ -12,7 +12,9 @@
             <span class="step__counter"></span>
             <span class="wrapper--copy">
                 <span class="step__label">Assess Yourself</span>
-                <span class="step__deadline">due <span class="date">{{ formatted_due_datetime }}</span></span>
+                {% if self_due %}
+                <span class="step__deadline">due <span class="date">{{ self_due }}</span></span>
+                {% endif %}
             </span>
         </h2>
 

apps/openassessment/xblock/openassessmentblock.py

@@ -2,6 +2,7 @@
 
 import datetime as dt
 import logging
+import dateutil
 import pkg_resources
 
 import pytz
@@ -155,6 +156,9 @@ DEFAULT_ASSESSMENT_MODULES = [
     DEFAULT_SELF_ASSESSMENT,
 ]
 
+DATE_FORMAT = "%A, %B %d, %Y"
+DATETIME_FORMAT = "%A, %B %d, %Y %X"
+
 
 def load(path):
     """Handy helper for getting resources from our kit."""
@@ -366,16 +370,36 @@ class OpenAssessmentBlock(
             context_dict = {}
 
         if self.start:
-            context_dict["formatted_start_date"] = self.start.strftime("%A, %B %d, %Y")
-            context_dict["formatted_start_datetime"] = self.start.strftime("%A, %B %d, %Y %X")
+            context_dict["formatted_start_date"] = self.start.strftime(DATE_FORMAT)
+            context_dict["formatted_start_datetime"] = self.start.strftime(DATETIME_FORMAT)
         if self.due:
-            context_dict["formatted_due_date"] = self.due.strftime("%A, %B %d, %Y")
-            context_dict["formatted_due_datetime"] = self.due.strftime("%A, %B %d, %Y %X")
+            context_dict["formatted_due_date"] = self.due.strftime(DATE_FORMAT)
+            context_dict["formatted_due_datetime"] = self.due.strftime(DATETIME_FORMAT)
 
         template = get_template(path)
         context = Context(context_dict)
         return Response(template.render(context), content_type='application/html', charset='UTF-8')
 
+    def format_date_string(self, date):
+        """Takes a date string, and formats it to be a user facing date.
+
+        Format a date string to be user facing.
+
+        """
+        return dateutil.parser.parse(
+            unicode(date)
+        ).replace(tzinfo=pytz.utc).strftime(DATE_FORMAT)
+
+    def format_datetime_string(self, datetime):
+        """Takes a datetime string, and formats it to be a user facing time.
+
+        Format a datetime string to be user facing.
+
+        """
+        return dateutil.parser.parse(
+            unicode(datetime)
+        ).replace(tzinfo=pytz.utc).strftime(DATETIME_FORMAT)
+
     def add_xml_to_node(self, node):
         """
         Serialize the XBlock to XML for exporting.

apps/openassessment/xblock/peer_assessment_mixin.py

@@ -149,6 +149,9 @@ class PeerAssessmentMixin(object):
                 context_dict["submit_button_text"] = (
                     "Submit your assessment & move to response #{}"
                 ).format(count + 2)
+            if assessment.get('due'):
+                context_dict["peer_due"] = self.format_datetime_string(assessment["due"])
+
 
         if date == "due" and not problem_open:
             path = 'openassessmentblock/peer/oa_peer_closed.html'

apps/openassessment/xblock/self_assessment_mixin.py

@@ -24,11 +24,17 @@ class SelfAssessmentMixin(object):
     @XBlock.handler
     def render_self_assessment(self, data, suffix=''):
         context = {}
+
+        assessment_module = self.get_assessment_module('self-assessment')
+        if assessment_module and assessment_module.get('due'):
+            context["self_due"] = self.format_datetime_string(assessment_module["due"])
+
         path = 'openassessmentblock/self/oa_self_unavailable.html'
         problem_open, date = self.is_open(step="self")
         workflow = self.get_workflow_info()
         if not workflow:
             return self.render_assessment(path, context)
+
         try:
             submission = submission_api.get_submission(self.submission_uuid)
             assessment = self_api.get_assessment(