add fix extensions button to extensions dashboard

If a student was granted an extension on a problem bank and a new
problem gets added to the bank the new problem doesn't inherit the
extensions.  This button is a stop-gap solution to re-apply all of the
extensions to the new problem.

lms/djangoapps/instructor/views/api.py

@@ -67,6 +67,7 @@ from .tools import (
     set_due_date_extension,
     strip_if_string,
     bulk_email_is_enabled_for_course,
+    fix_missing_extensions,
 )
 from xmodule.modulestore import Location
 
@@ -1233,6 +1234,19 @@ def reset_due_date(request, course_id):
 @ensure_csrf_cookie
 @cache_control(no_cache=True, no_store=True, must_revalidate=True)
 @require_level('staff')
+def fix_extensions(request, course_id):
+    """
+    Fix any <problems> missing their parent's 'extended_due'
+    """
+    course = get_course_by_id(course_id)
+    fix_missing_extensions(course)
+    return JsonResponse(_('Successfully repaired extensions'))
+
+
+@handle_dashboard_error
+@ensure_csrf_cookie
+@cache_control(no_cache=True, no_store=True, must_revalidate=True)
+@require_level('staff')
 @require_query_params('url')
 def show_unit_extensions(request, course_id):
     """

lms/djangoapps/instructor/views/api_urls.py

@@ -47,6 +47,8 @@ urlpatterns = patterns('',  # nopep8
         name='show_unit_extensions'),
     url(r'^show_student_extensions$', 'instructor.views.api.show_student_extensions',
         name='show_student_extensions'),
+    url(r'^fix_extensions$', 'instructor.views.api.fix_extensions',
+        name='fix_extensions'),
 
     # Grade downloads...
     url(r'^list_report_downloads$',

lms/djangoapps/instructor/views/instructor_dashboard.py

@@ -190,6 +190,7 @@ def _section_extensions(course):
         'reset_due_date_url': reverse('reset_due_date', kwargs={'course_id': course.id}),
         'show_unit_extensions_url': reverse('show_unit_extensions', kwargs={'course_id': course.id}),
         'show_student_extensions_url': reverse('show_student_extensions', kwargs={'course_id': course.id}),
+        'fix_extensions_url': reverse('fix_extensions', kwargs={'course_id': course.id}),
     }
     return section_data
 

lms/djangoapps/instructor/views/tools.py

 """
 Tools for the instructor dashboard
 """
-import dateutil
 import json
+import dateutil
+import itertools
 
 from django.conf import settings
 from django.contrib.auth.models import User
@@ -251,3 +252,30 @@ def dump_student_extensions(course, student):
         "title": _("Due date extensions for {0} {1} ({2})").format(
             student.first_name, student.last_name, student.username),
         "data": data}
+
+
+def fix_missing_extensions(course):
+    units = get_units_with_due_date(course)
+    units = dict([(u.location.url(), u) for u in units])
+    msks = units.keys()
+    query = StudentModule.objects.filter(
+        course_id=course.id,
+        module_state_key__in=msks,
+        state__contains='extended_due'
+    )
+    eunit_map = itertools.groupby(query, lambda el: el.student)
+    reapplied = {}
+    for student, extended_modules in eunit_map:
+        for module in extended_modules:
+            state = json.loads(module.state)
+            edue = DATE_FIELD.from_json(state.get('extended_due'))
+            if not edue:
+                continue
+            unit = units.get(module.module_state_key)
+            print('reapplying extension %s to %s for user %s' %
+                  (edue, unit.location.url(), student.username))
+            set_due_date_extension(course, unit, student, edue)
+            r = reapplied.get(student.username, [])
+            r.append(unit.location.url())
+            reapplied[student.username] = r
+    return reapplied

lms/static/coffee/src/instructor_dashboard/extensions.coffee

@@ -23,6 +23,7 @@ class Extensions
     @$reset_due_date = @$section.find("input[name='reset-due-date']")
     @$show_unit_extensions = @$section.find("input[name='show-unit-extensions']")
     @$show_student_extensions = @$section.find("input[name='show-student-extensions']")
+    @$fix_extensions = @$section.find("input[name='fix-extensions']")
 
     # Gather notification areas
     @$section.find(".request-response").hide()
@@ -66,6 +67,16 @@ class Extensions
         success: (data) => @display_response "reset-extension", data
         error: (xhr) => @fail_with_error "reset-extension", "Error reseting due date", xhr
 
+    @$fix_extensions.click =>
+      @clear_display()
+      send_data = {}
+      $.ajax
+        dataType: 'json'
+        url: @$fix_extensions.data 'endpoint'
+        data: send_data
+        success: (data) => @display_response "fix-extensions", data
+        error: (xhr) => @fail_with_error "fix-extensions", "Error fixing extensions", xhr
+
     @$show_unit_extensions.click =>
       @clear_display()
       @$grid_table.text 'Loading...'

lms/templates/instructor/instructor_dashboard_2/extensions.html

@@ -110,3 +110,18 @@
   </p>
 </div>
 
+<hr/>
+<div id="fix-extensions">
+  <h2>${_("Fix extensions")}</h2>
+  <p>
+  ${_("Newly added problems currently do not inherit the extended_due "
+      "property from it's parent. The button below fixes this issue.")}
+  </p>
+  <p class="request-response"></p>
+  <p class="request-response-error"></p>
+  <p>
+    <input type="button" name="fix-extensions"
+           value="${_("Fix extensions")}"
+           data-endpoint="${section_data['fix_extensions_url']}">
+  </p>
+</div>