79 lines
2.7 KiB
Python
79 lines
2.7 KiB
Python
"""
|
|
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', 'currency'])
|
|
|
|
|
|
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='')
|
|
|
|
# the currency these prices are in, using lower case ISO currency codes
|
|
currency = models.CharField(default="usd", max_length=8)
|
|
|
|
DEFAULT_MODE = Mode('honor', _('Honor Code Certificate'), 0, '', 'usd')
|
|
DEFAULT_MODE_SLUG = 'honor'
|
|
|
|
class Meta:
|
|
""" meta attributes of this model """
|
|
unique_together = ('course_id', 'mode_slug', 'currency')
|
|
|
|
@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, mode.currency)
|
|
for mode in found_course_modes])
|
|
if not modes:
|
|
modes = [cls.DEFAULT_MODE]
|
|
return modes
|
|
|
|
@classmethod
|
|
def modes_for_course_dict(cls, course_id):
|
|
return { mode.slug : mode for mode in cls.modes_for_course(course_id) }
|
|
|
|
def __unicode__(self):
|
|
return u"{} : {}, min={}, prices={}".format(
|
|
self.course_id, self.mode_slug, self.min_price, self.suggested_prices
|
|
)
|
|
|
|
@classmethod
|
|
def mode_for_course(cls, course_id, mode_slug):
|
|
"""
|
|
Returns the mode for the course corresponding to mode_slug.
|
|
|
|
If this particular mode is not set for the course, returns None
|
|
"""
|
|
modes = cls.modes_for_course(course_id)
|
|
|
|
matched = [m for m in modes if m.slug == mode_slug]
|
|
if matched:
|
|
return matched[0]
|
|
else:
|
|
return None
|