Modify program progress meter for use on detail pages

The meter now supports use with a single program, and can return serialized courses instead of counts when measuring progress.

ECOM-6602

lms/djangoapps/learner_dashboard/views.py

@@ -34,7 +34,7 @@ def program_listing(request):
         'marketing_url': get_program_marketing_url(programs_config),
         'nav_hidden': True,
         'programs': meter.engaged_programs,
-        'progress': meter.progress,
+        'progress': meter.progress(),
         'show_program_listing': programs_config.enabled,
         'uses_pattern_library': True,
     }
@@ -50,7 +50,9 @@ def program_details(request, program_uuid):
     if not programs_config.enabled:
         raise Http404
 
-    program_data = get_programs(uuid=program_uuid)
+    meter = ProgramProgressMeter(request.user, uuid=program_uuid)
+    program_data = meter.programs[0]
+
     if not program_data:
         raise Http404
 
@@ -65,7 +67,6 @@ def program_details(request, program_uuid):
     }
 
     context = {
-        'program_data': program_data,
         'urls': urls,
         'show_program_listing': programs_config.enabled,
         'nav_hidden': True,
@@ -75,6 +76,16 @@ def program_details(request, program_uuid):
     }
 
     if waffle.switch_is_active('new_program_progress'):
+        course_progress = meter.progress(programs=[program_data], count_only=False)[0]
+        program_data.pop('courses')
+
+        context.update({
+            'program_data': program_data,
+            'course_progress': course_progress,
+        })
+
         return render_to_response('learner_dashboard/program_details_2017.html', context)
     else:
+        context.update({'program_data': program_data})
+
         return render_to_response('learner_dashboard/program_details.html', context)

openedx/core/djangoapps/programs/tests/test_utils.py

@@ -53,7 +53,7 @@ class TestProgramProgressMeter(TestCase):
 
     def _assert_progress(self, meter, *progresses):
         """Variadic helper used to verify progress calculations."""
-        self.assertEqual(meter.progress, list(progresses))
+        self.assertEqual(meter.progress(), list(progresses))
 
     def _attach_detail_url(self, programs):
         """Add expected detail URLs to a list of program dicts."""
@@ -113,6 +113,39 @@ class TestProgramProgressMeter(TestCase):
         )
         self.assertEqual(meter.completed_programs, [])
 
+    def test_course_progress(self, mock_get_programs):
+        """
+        Verify that the progress meter can represent progress in terms of
+        serialized courses.
+        """
+        course_run_key = generate_course_run_key()
+        data = [
+            ProgramFactory(
+                courses=[
+                    CourseFactory(course_runs=[
+                        CourseRunFactory(key=course_run_key),
+                    ]),
+                ]
+            )
+        ]
+        mock_get_programs.return_value = data
+
+        self._create_enrollments(course_run_key)
+
+        meter = ProgramProgressMeter(self.user)
+
+        program = data[0]
+        expected = [
+            ProgressFactory(
+                uuid=program['uuid'],
+                completed=[],
+                in_progress=[program['courses'][0]],
+                not_started=[]
+            )
+        ]
+
+        self.assertEqual(meter.progress(count_only=False), expected)
+
     def test_mutiple_program_engagement(self, mock_get_programs):
         """
         Verify that correct programs are returned in the correct order when the

openedx/core/djangoapps/programs/utils.py

@@ -57,8 +57,11 @@ class ProgramProgressMeter(object):
 
     Keyword Arguments:
         enrollments (list): List of the user's enrollments.
+        uuid (str): UUID identifying a specific program. If provided, the meter
+            will only inspect this one program, not all programs the user may be
+            engaged with.
     """
-    def __init__(self, user, enrollments=None):
+    def __init__(self, user, enrollments=None, uuid=None):
         self.user = user
 
         self.enrollments = enrollments or list(CourseEnrollment.enrollments_for_user(self.user))
@@ -67,6 +70,9 @@ class ProgramProgressMeter(object):
         # enrollment.course_id is really a CourseKey (╯ಠ_ಠ）╯︵ ┻━┻
         self.course_run_ids = [unicode(e.course_id) for e in self.enrollments]
 
+        if uuid:
+            self.programs = [get_programs(uuid=uuid)]
+        else:
             self.programs = attach_program_detail_url(get_programs())
 
     def invert_programs(self):
@@ -119,31 +125,39 @@ class ProgramProgressMeter(object):
 
         return programs
 
-    @property
-    def progress(self):
+    def progress(self, programs=None, count_only=True):
         """Gauge a user's progress towards program completion.
 
+        Keyword Arguments:
+            programs (list): Specific list of programs to check the user's progress
+                against. If left unspecified, self.engaged_programs will be used.
+
+            count_only (bool): Whether or not to return counts of completed, in
+                progress, and unstarted courses instead of serialized representations
+                of the courses.
+
         Returns:
             list of dict, each containing information about a user's progress
                 towards completing a program.
         """
         progress = []
-        for program in self.engaged_programs:
-            completed, in_progress, not_started = 0, 0, 0
+        programs = programs or self.engaged_programs
+        for program in programs:
+            completed, in_progress, not_started = [], [], []
 
             for course in program['courses']:
                 if self._is_course_complete(course):
-                    completed += 1
+                    completed.append(course)
                 elif self._is_course_in_progress(course):
-                    in_progress += 1
+                    in_progress.append(course)
                 else:
-                    not_started += 1
+                    not_started.append(course)
 
             progress.append({
                 'uuid': program['uuid'],
-                'completed': completed,
-                'in_progress': in_progress,
-                'not_started': not_started,
+                'completed': len(completed) if count_only else completed,
+                'in_progress': len(in_progress) if count_only else in_progress,
+                'not_started': len(not_started) if count_only else not_started,
             })
 
         return progress