150 lines
5.3 KiB
Python
150 lines
5.3 KiB
Python
from django.conf import settings
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from xmodule.modulestore import Location
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from xmodule.modulestore.django import modulestore
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from xmodule.modulestore.exceptions import ItemNotFoundError
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import os, tempfile, zipfile
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from django.http import HttpResponse
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from django.core.servers.basehttp import FileWrapper
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DIRECT_ONLY_CATEGORIES = ['course', 'chapter', 'sequential', 'about', 'static_tab', 'course_info']
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def get_modulestore(location):
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"""
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Returns the correct modulestore to use for modifying the specified location
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"""
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if not isinstance(location, Location):
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location = Location(location)
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if location.category in DIRECT_ONLY_CATEGORIES:
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return modulestore('direct')
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else:
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return modulestore()
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def get_course_location_for_item(location):
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'''
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cdodge: for a given Xmodule, return the course that it belongs to
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NOTE: This makes a lot of assumptions about the format of the course location
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Also we have to assert that this module maps to only one course item - it'll throw an
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assert if not
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'''
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item_loc = Location(location)
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# check to see if item is already a course, if so we can skip this
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if item_loc.category != 'course':
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# @hack! We need to find the course location however, we don't
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# know the 'name' parameter in this context, so we have
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# to assume there's only one item in this query even though we are not specifying a name
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course_search_location = ['i4x', item_loc.org, item_loc.course, 'course', None]
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courses = modulestore().get_items(course_search_location)
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# make sure we found exactly one match on this above course search
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found_cnt = len(courses)
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if found_cnt == 0:
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raise BaseException('Could not find course at {0}'.format(course_search_location))
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if found_cnt > 1:
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raise BaseException('Found more than one course at {0}. There should only be one!!! Dump = {1}'.format(course_search_location, courses))
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location = courses[0].location
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return location
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def get_course_for_item(location):
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'''
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cdodge: for a given Xmodule, return the course that it belongs to
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NOTE: This makes a lot of assumptions about the format of the course location
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Also we have to assert that this module maps to only one course item - it'll throw an
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assert if not
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'''
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item_loc = Location(location)
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# @hack! We need to find the course location however, we don't
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# know the 'name' parameter in this context, so we have
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# to assume there's only one item in this query even though we are not specifying a name
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course_search_location = ['i4x', item_loc.org, item_loc.course, 'course', None]
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courses = modulestore().get_items(course_search_location)
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# make sure we found exactly one match on this above course search
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found_cnt = len(courses)
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if found_cnt == 0:
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raise BaseException('Could not find course at {0}'.format(course_search_location))
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if found_cnt > 1:
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raise BaseException('Found more than one course at {0}. There should only be one!!! Dump = {1}'.format(course_search_location, courses))
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return courses[0]
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def get_lms_link_for_item(location, preview=False):
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if settings.LMS_BASE is not None:
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lms_link = "//{preview}{lms_base}/courses/{course_id}/jump_to/{location}".format(
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preview='preview.' if preview else '',
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lms_base=settings.LMS_BASE,
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course_id=get_course_id(location),
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location=Location(location)
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)
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else:
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lms_link = None
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return lms_link
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def get_lms_link_for_about_page(location):
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"""
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Returns the url to the course about page from the location tuple.
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"""
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if settings.LMS_BASE is not None:
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lms_link = "//{lms_base}/courses/{course_id}/about".format(
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lms_base=settings.LMS_BASE,
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course_id=get_course_id(location)
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)
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else:
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lms_link = None
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return lms_link
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def get_course_id(location):
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"""
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Returns the course_id from a given the location tuple.
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"""
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# TODO: These will need to be changed to point to the particular instance of this problem in the particular course
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return modulestore().get_containing_courses(Location(location))[0].id
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class UnitState(object):
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draft = 'draft'
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private = 'private'
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public = 'public'
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def compute_unit_state(unit):
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"""
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Returns whether this unit is 'draft', 'public', or 'private'.
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'draft' content is in the process of being edited, but still has a previous
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version visible in the LMS
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'public' content is locked and visible in the LMS
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'private' content is editabled and not visible in the LMS
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"""
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if unit.metadata.get('is_draft', False):
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try:
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modulestore('direct').get_item(unit.location)
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return UnitState.draft
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except ItemNotFoundError:
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return UnitState.private
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else:
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return UnitState.public
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def get_date_display(date):
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return date.strftime("%d %B, %Y at %I:%M %p")
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def update_item(location, value):
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"""
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If value is None, delete the db entry. Otherwise, update it using the correct modulestore.
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"""
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if value is None:
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get_modulestore(location).delete_item(location)
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else:
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get_modulestore(location).update_item(location, value) |