Merge pull request #676 from edx/diana/course-modes

Add Course Modes to LMS

lms/djangoapps/course_modes/admin.py

+from ratelimitbackend import admin
+from course_modes.models import CourseMode
+
+admin.site.register(CourseMode)

lms/djangoapps/course_modes/migrations/0001_initial.py

+# -*- coding: utf-8 -*-
+import datetime
+from south.db import db
+from south.v2 import SchemaMigration
+from django.db import models
+
+
+class Migration(SchemaMigration):
+
+    def forwards(self, orm):
+        # Adding model 'CourseMode'
+        db.create_table('course_modes_coursemode', (
+            ('id', self.gf('django.db.models.fields.AutoField')(primary_key=True)),
+            ('course_id', self.gf('django.db.models.fields.CharField')(max_length=255, db_index=True)),
+            ('mode_slug', self.gf('django.db.models.fields.CharField')(max_length=100)),
+            ('mode_display_name', self.gf('django.db.models.fields.CharField')(max_length=255)),
+            ('min_price', self.gf('django.db.models.fields.IntegerField')(default=0)),
+            ('suggested_prices', self.gf('django.db.models.fields.CommaSeparatedIntegerField')(default='', max_length=255, blank=True)),
+        ))
+        db.send_create_signal('course_modes', ['CourseMode'])
+
+
+    def backwards(self, orm):
+        # Deleting model 'CourseMode'
+        db.delete_table('course_modes_coursemode')
+
+
+    models = {
+        'course_modes.coursemode': {
+            'Meta': {'object_name': 'CourseMode'},
+            'course_id': ('django.db.models.fields.CharField', [], {'max_length': '255', 'db_index': 'True'}),
+            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'min_price': ('django.db.models.fields.IntegerField', [], {'default': '0'}),
+            'mode_display_name': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
+            'mode_slug': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
+            'suggested_prices': ('django.db.models.fields.CommaSeparatedIntegerField', [], {'default': "''", 'max_length': '255', 'blank': 'True'})
+        }
+    }
+
+    complete_apps = ['course_modes']
\ No newline at end of file

lms/djangoapps/course_modes/models.py

+"""
+Add and create new modes for running courses on this particular LMS
+"""
+from django.db import models
+from collections import namedtuple
+from django.utils.translation import ugettext as _
+
+Mode = namedtuple('Mode', ['slug', 'name', 'min_price', 'suggested_prices'])
+
+
+class CourseMode(models.Model):
+    """
+    We would like to offer a course in a variety of modes.
+
+    """
+    # the course that this mode is attached to
+    course_id = models.CharField(max_length=255, db_index=True)
+
+    # the reference to this mode that can be used by Enrollments to generate
+    # similar behavior for the same slug across courses
+    mode_slug = models.CharField(max_length=100)
+
+    # The 'pretty' name that can be translated and displayed
+    mode_display_name = models.CharField(max_length=255)
+
+    # minimum price in USD that we would like to charge for this mode of the course
+    min_price = models.IntegerField(default=0)
+
+    # the suggested prices for this mode
+    suggested_prices = models.CommaSeparatedIntegerField(max_length=255, blank=True, default='')
+
+    DEFAULT_MODE = Mode('honor', _('Honor Code Certificate'), 0, '')
+
+    @classmethod
+    def modes_for_course(cls, course_id):
+        """
+        Returns a list of the modes for a given course id
+
+        If no modes have been set in the table, returns the default mode
+        """
+        found_course_modes = cls.objects.filter(course_id=course_id)
+        modes = ([Mode(mode.mode_slug, mode.mode_display_name, mode.min_price, mode.suggested_prices)
+                  for mode in found_course_modes])
+        if not modes:
+            modes = [cls.DEFAULT_MODE]
+        return modes

lms/djangoapps/course_modes/tests.py

+"""
+This file demonstrates writing tests using the unittest module. These will pass
+when you run "manage.py test".
+
+Replace this with more appropriate tests for your application.
+"""
+
+from django.test import TestCase
+from course_modes.models import CourseMode, Mode
+
+
+class CourseModeModelTest(TestCase):
+    """
+    Tests for the CourseMode model
+    """
+
+    def setUp(self):
+        self.course_id = 'TestCourse'
+        CourseMode.objects.all().delete()
+
+    def create_mode(self, mode_slug, mode_name, min_price=0, suggested_prices=''):
+        """
+        Create a new course mode
+        """
+        CourseMode.objects.get_or_create(
+            course_id=self.course_id,
+            mode_display_name=mode_name,
+            mode_slug=mode_slug,
+            min_price=min_price,
+            suggested_prices=suggested_prices
+        )
+
+    def test_modes_for_course_empty(self):
+        """
+        If we can't find any modes, we should get back the default mode
+        """
+        # shouldn't be able to find a corresponding course
+        modes = CourseMode.modes_for_course(self.course_id)
+        self.assertEqual([CourseMode.DEFAULT_MODE], modes)
+
+    def test_nodes_for_course_single(self):
+        """
+        Find the modes for a course with only one mode
+        """
+
+        self.create_mode('verified', 'Verified Certificate')
+        modes = CourseMode.modes_for_course(self.course_id)
+        self.assertEqual([Mode(u'verified', u'Verified Certificate', 0, '')], modes)
+
+    def test_modes_for_course_multiple(self):
+        """
+        Finding the modes when there's multiple modes
+        """
+        mode1 = Mode(u'honor', u'Honor Code Certificate', 0, '')
+        mode2 = Mode(u'verified', u'Verified Certificate', 0, '')
+        set_modes = [mode1, mode2]
+        for mode in set_modes:
+            self.create_mode(mode.slug, mode.name, mode.min_price, mode.suggested_prices)
+
+        modes = CourseMode.modes_for_course(self.course_id)
+        self.assertEqual(modes, set_modes)

lms/djangoapps/course_modes/views.py

+# Create your views here.

lms/envs/common.py

@@ -771,6 +771,9 @@ INSTALLED_APPS = (
 
     # Notification preferences setting
     'notification_prefs',
+
+    # Different Course Modes
+    'course_modes'
 )
 
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