def test_creation(self):
"""
The user that creates a library should have instructor (admin) and staff permissions
"""
# self.library has been auto-created by the staff user.
self.assertTrue(has_studio_write_access(self.user, self.lib_key))
self.assertTrue(has_studio_read_access(self.user, self.lib_key))
# Make sure the user was actually assigned the instructor role and not just using is_staff superpowers:
self.assertTrue(CourseInstructorRole(self.lib_key).has_user(self.user))
# Now log out and ensure we are forbidden from creating a library:
self.client.logout()
self._assert_cannot_create_library(expected_code=302) # 302 redirect to login expected
# Now check that logged-in users without CourseCreator role cannot create libraries
self._login_as_non_staff_user(logout_first=False)
with patch.dict('django.conf.settings.FEATURES', {'ENABLE_CREATOR_GROUP': True}):
self._assert_cannot_create_library(expected_code=403) # 403 user is not CourseCreator
# Now check that logged-in users with CourseCreator role can create libraries
add_user_with_status_granted(self.user, self.non_staff_user)
with patch.dict('django.conf.settings.FEATURES', {'ENABLE_CREATOR_GROUP': True}):
lib_key2 = self._create_library(library="lib2", display_name="Test Library 2")
library2 = modulestore().get_library(lib_key2)
self.assertIsNotNone(library2)
def test_creation(self):
"""
The user that creates a library should have instructor (admin) and staff permissions
"""
# self.library has been auto-created by the staff user.
self.assertTrue(has_studio_write_access(self.user, self.lib_key))
self.assertTrue(has_studio_read_access(self.user, self.lib_key))
# Make sure the user was actually assigned the instructor role and not just using is_staff superpowers:
self.assertTrue(CourseInstructorRole(self.lib_key).has_user(self.user))
# Now log out and ensure we are forbidden from creating a library:
self.client.logout()
self._assert_cannot_create_library(expected_code=302) # 302 redirect to login expected
# Now check that logged-in users without CourseCreator role cannot create libraries
self._login_as_non_staff_user(logout_first=False)
with patch.dict('django.conf.settings.FEATURES', {'ENABLE_CREATOR_GROUP': True}):
self._assert_cannot_create_library(expected_code=403) # 403 user is not CourseCreator
# Now check that logged-in users with CourseCreator role can create libraries
add_user_with_status_granted(self.user, self.non_staff_user)
with patch.dict('django.conf.settings.FEATURES', {'ENABLE_CREATOR_GROUP': True}):
lib_key2 = self._create_library(library="lib2", display_name="Test Library 2")
library2 = modulestore().get_library(lib_key2)
self.assertIsNotNone(library2)
def import_from_blockstore(self, dest_block, blockstore_block_id):
"""
Imports a block from a blockstore-based learning context (usually a
content library) into modulestore, as a new child of dest_block.
Any existing children of dest_block are replaced.
This is only used by LibrarySourcedBlock. It should verify first that
the number of block IDs is reasonable.
"""
dest_key = dest_block.scope_ids.usage_id
if not isinstance(dest_key, BlockUsageLocator):
raise TypeError(
"Destination {} should be a modulestore course.".format(
dest_key))
if self.user_id is None:
raise ValueError(
"Cannot check user permissions - LibraryTools user_id is None")
dest_course_key = dest_key.context_key
user = User.objects.get(id=self.user_id)
if not has_studio_write_access(user, dest_course_key):
raise PermissionDenied()
# Read the source block; this will also confirm that user has permission to read it.
orig_block = load_block(UsageKey.from_string(blockstore_block_id),
user)
with self.store.bulk_operations(dest_course_key):
new_block_id = self._import_block(orig_block, dest_key)
# Remove any existing children that are no longer used
for old_child_id in set(dest_block.children) - set([new_block_id]):
self.store.delete_item(old_child_id, self.user_id)
# If this was called from a handler, it will save dest_block at the end, so we must update
# dest_block.children to avoid it saving the old value of children and deleting the new ones.
dest_block.children = self.store.get_item(dest_key).children
def _create_item(request):
"""View for create items."""
parent_locator = request.json['parent_locator']
usage_key = usage_key_with_run(parent_locator)
if not has_studio_write_access(request.user, usage_key.course_key):
raise PermissionDenied()
category = request.json['category']
if isinstance(usage_key, LibraryUsageLocator):
# Only these categories are supported at this time.
if category not in ['html', 'problem', 'video']:
return HttpResponseBadRequest(
"Category '%s' not supported for Libraries" % category, content_type='text/plain'
)
created_block = create_xblock(
parent_locator=parent_locator,
user=request.user,
category=category,
display_name=request.json.get('display_name'),
boilerplate=request.json.get('boilerplate')
)
return JsonResponse(
{"locator": unicode(created_block.location), "courseKey": unicode(created_block.location.course_key)}
)
def _create_item(request):
"""View for create items."""
parent_locator = request.json['parent_locator']
usage_key = usage_key_with_run(parent_locator)
if not has_studio_write_access(request.user, usage_key.course_key):
raise PermissionDenied()
category = request.json['category']
if isinstance(usage_key, LibraryUsageLocator):
# Only these categories are supported at this time.
if category not in ['html', 'problem', 'video']:
return HttpResponseBadRequest(
"Category '%s' not supported for Libraries" % category,
content_type='text/plain')
created_block = create_xblock(
parent_locator=parent_locator,
user=request.user,
category=category,
display_name=request.json.get('display_name'),
boilerplate=request.json.get('boilerplate'))
return JsonResponse({
"locator": unicode(created_block.location),
"courseKey": unicode(created_block.location.course_key)
})
def _get_course_and_check_access(course_key, user, depth=0):
"""
Internal method used to calculate and return the locator and
course module for the view functions in this file.
"""
if not has_studio_write_access(user, course_key):
raise PermissionDenied()
course_module = modulestore().get_course(course_key, depth=depth)
return course_module
def _get_course_and_check_access(course_key, user, depth=0):
"""
Internal method used to calculate and return the locator and
course module for the view functions in this file.
"""
if not has_studio_write_access(user, course_key):
raise PermissionDenied()
course_module = modulestore().get_course(course_key, depth=depth)
return course_module
def library_blocks_view(library, user, response_format):
"""
The main view of a course's content library.
Shows all the XBlocks in the library, and allows adding/editing/deleting
them.
Can be called with response_format="json" to get a JSON-formatted list of
the XBlocks in the library along with library metadata.
Assumes that read permissions have been checked before calling this.
"""
assert isinstance(library.location.library_key, LibraryLocator)
assert isinstance(library.location, LibraryUsageLocator)
children = library.children
if response_format == "json":
# The JSON response for this request is short and sweet:
prev_version = library.runtime.course_entry.structure[
'previous_version']
return JsonResponse({
"display_name":
library.display_name,
"library_id":
unicode(library.location.library_key),
"version":
unicode(library.runtime.course_entry.course_key.version),
"previous_version":
unicode(prev_version) if prev_version else None,
"blocks": [unicode(x) for x in children],
})
can_edit = has_studio_write_access(user, library.location.library_key)
xblock_info = create_xblock_info(library,
include_ancestor_info=False,
graders=[])
component_templates = get_component_templates(
library, library=True) if can_edit else []
return render_to_response(
'library.html', {
'can_edit':
can_edit,
'context_library':
library,
'component_templates':
json.dumps(component_templates),
'xblock_info':
xblock_info,
'templates':
CONTAINER_TEMPATES,
'lib_users_url':
reverse_library_url('manage_library_users',
unicode(library.location.library_key)),
})
def validate_user(self, request, course_id):
"""Validate user has studio access to this course"""
try:
course_key = CourseKey.from_string(course_id)
if not has_studio_write_access(request.user, course_key):
msg = "Access Denied. User: {} does not have instructor rights"\
" in this course"\
.format(request.user.username)
raise ValidationError(msg, 403)
# Something wrong with CourseKey
except InvalidKeyError as e:
msg = "Course: {} not found".format(course_id)
raise ValidationError(msg, 404)
def publish_notes(self, data, suffix=''):
"""Make a note public only for the teacher
"""
student = self.__get_current_user()
timecoded = KNote.objects.get(pk=data.get("pk"))
if ((timecoded.timecoded_comment.user.pk == self.scope_ids.user_id) and (has_studio_write_access(student, self.scope_ids.usage_id.course_key))):
is_public = False
if (data.get("public") == "true"):
is_public = True
timecoded.is_public = data.get("public")
timecoded.save()
return {'result': 'success'}
else :
return {'error': 'bad credential'}
def format_library_for_view(library, this_user=None):
"""
Return a dict of the data which the view requires for each library
"""
if this_user:
user = this_user
else:
user = request.user
return {
'display_name': library.display_name,
'library_key': unicode(library.location.library_key),
'url': reverse_library_url('library_handler', unicode(library.location.library_key)),
'org': library.display_org_with_default,
'number': library.display_number_with_default,
'can_edit': has_studio_write_access(user, library.location.library_key),
}
def test_creation(self):
"""
The user that creates a library should have instructor (admin) and staff permissions
"""
# self.library has been auto-created by the staff user.
self.assertTrue(has_studio_write_access(self.user, self.lib_key))
self.assertTrue(has_studio_read_access(self.user, self.lib_key))
# Make sure the user was actually assigned the instructor role and not just using is_staff superpowers:
self.assertTrue(CourseInstructorRole(self.lib_key).has_user(self.user))
# Now log out and ensure we are forbidden from creating a library:
self.client.logout()
self._assert_cannot_create_library(expected_code=302) # 302 redirect to login expected
# Now create a non-staff user with no permissions:
self._login_as_non_staff_user(logout_first=False)
self.assertFalse(CourseCreatorRole().has_user(self.non_staff_user))
# Now check that logged-in users without any permissions cannot create libraries
with patch.dict('django.conf.settings.FEATURES', {'ENABLE_CREATOR_GROUP': True}):
self._assert_cannot_create_library()
def test_creation(self):
"""
The user that creates a library should have instructor (admin) and staff permissions
"""
# self.library has been auto-created by the staff user.
self.assertTrue(has_studio_write_access(self.user, self.lib_key))
self.assertTrue(has_studio_read_access(self.user, self.lib_key))
# Make sure the user was actually assigned the instructor role and not just using is_staff superpowers:
self.assertTrue(CourseInstructorRole(self.lib_key).has_user(self.user))
# Now log out and ensure we are forbidden from creating a library:
self.client.logout()
self._assert_cannot_create_library(expected_code=302) # 302 redirect to login expected
# Now create a non-staff user with no permissions:
self._login_as_non_staff_user(logout_first=False)
self.assertFalse(CourseCreatorRole().has_user(self.non_staff_user))
# Now check that logged-in users without any permissions cannot create libraries
with patch.dict("django.conf.settings.FEATURES", {"ENABLE_CREATOR_GROUP": True}):
self._assert_cannot_create_library()
def library_blocks_view(library, user, response_format):
"""
The main view of a course's content library.
Shows all the XBlocks in the library, and allows adding/editing/deleting
them.
Can be called with response_format="json" to get a JSON-formatted list of
the XBlocks in the library along with library metadata.
Assumes that read permissions have been checked before calling this.
"""
assert isinstance(library.location.library_key, LibraryLocator)
assert isinstance(library.location, LibraryUsageLocator)
children = library.children
if response_format == "json":
# The JSON response for this request is short and sweet:
prev_version = library.runtime.course_entry.structure['previous_version']
return JsonResponse({
"display_name": library.display_name,
"library_id": unicode(library.location.library_key),
"version": unicode(library.runtime.course_entry.course_key.version),
"previous_version": unicode(prev_version) if prev_version else None,
"blocks": [unicode(x) for x in children],
})
can_edit = has_studio_write_access(user, library.location.library_key)
xblock_info = create_xblock_info(library, include_ancestor_info=False, graders=[])
component_templates = get_component_templates(library, library=True) if can_edit else []
return render_to_response('library.html', {
'can_edit': can_edit,
'context_library': library,
'component_templates': json.dumps(component_templates),
'xblock_info': xblock_info,
'templates': CONTAINER_TEMPATES,
'lib_users_url': reverse_library_url('manage_library_users', unicode(library.location.library_key)),
})
def transcript_delete_handler(request, course_key_string, edx_video_id, language_code):
"""
View to delete a transcript file.
Arguments:
request: A WSGI request object
course_key_string: Course key identifying a course.
edx_video_id: edX video identifier whose transcript need to be deleted.
language_code: transcript's language code.
Returns
- A 404 if the user does not have required permisions
- A 200 if transcript is deleted without any error(s)
"""
# Check whether the feature is available for this course.
course_key = CourseKey.from_string(course_key_string)
# User needs to have studio write access for this course.
if not has_studio_write_access(request.user, course_key):
return HttpResponseNotFound()
delete_video_transcript(video_id=edx_video_id, language_code=language_code)
return JsonResponse(status=200)
def transcript_delete_handler(request, course_key_string, edx_video_id, language_code):
"""
View to delete a transcript file.
Arguments:
request: A WSGI request object
course_key_string: Course key identifying a course.
edx_video_id: edX video identifier whose transcript need to be deleted.
language_code: transcript's language code.
Returns
- A 404 if the user does not have required permisions
- A 200 if transcript is deleted without any error(s)
"""
# Check whether the feature is available for this course.
course_key = CourseKey.from_string(course_key_string)
# User needs to have studio write access for this course.
if not has_studio_write_access(request.user, course_key):
return HttpResponseNotFound()
delete_video_transcript(video_id=edx_video_id, language_code=language_code)
return JsonResponse(status=200)
def can_write(self, course_key):
""" Does the user have read access to the given course/library? """
return has_studio_write_access(self._request.user, course_key)
def _create_item(request):
"""View for create items."""
usage_key = usage_key_with_run(request.json['parent_locator'])
if not has_studio_write_access(request.user, usage_key.course_key):
raise PermissionDenied()
category = request.json['category']
display_name = request.json.get('display_name')
if isinstance(usage_key, LibraryUsageLocator):
# Only these categories are supported at this time.
if category not in ['html', 'problem', 'video']:
return HttpResponseBadRequest(
"Category '%s' not supported for Libraries" % category, content_type='text/plain'
)
store = modulestore()
with store.bulk_operations(usage_key.course_key):
parent = store.get_item(usage_key)
dest_usage_key = usage_key.replace(category=category, name=uuid4().hex)
# get the metadata, display_name, and definition from the request
metadata = {}
data = None
template_id = request.json.get('boilerplate')
if template_id:
clz = parent.runtime.load_block_type(category)
if clz is not None:
template = clz.get_template(template_id)
if template is not None:
metadata = template.get('metadata', {})
data = template.get('data')
if display_name is not None:
metadata['display_name'] = display_name
# Entrance Exams: Chapter module positioning
child_position = None
if settings.FEATURES.get('ENTRANCE_EXAMS', False):
is_entrance_exam = request.json.get('is_entrance_exam', False)
if category == 'chapter' and is_entrance_exam:
metadata['is_entrance_exam'] = is_entrance_exam
metadata['in_entrance_exam'] = True # Inherited metadata, all children will have it
child_position = 0
# TODO need to fix components that are sending definition_data as strings, instead of as dicts
# For now, migrate them into dicts here.
if isinstance(data, basestring):
data = {'data': data}
created_block = store.create_child(
request.user.id,
usage_key,
dest_usage_key.block_type,
block_id=dest_usage_key.block_id,
definition_data=data,
metadata=metadata,
runtime=parent.runtime,
position=child_position
)
# Entrance Exams: Grader assignment
if settings.FEATURES.get('ENTRANCE_EXAMS', False):
course = store.get_course(usage_key.course_key)
if hasattr(course, 'entrance_exam_enabled') and course.entrance_exam_enabled:
if category == 'sequential' and request.json.get('parent_locator') == course.entrance_exam_id:
grader = {
"type": "Entrance Exam",
"min_count": 0,
"drop_count": 0,
"short_label": "Entrance",
"weight": 0
}
grading_model = CourseGradingModel.update_grader_from_json(
course.id,
grader,
request.user
)
CourseGradingModel.update_section_grader_type(
created_block,
grading_model['type'],
request.user
)
# VS[compat] cdodge: This is a hack because static_tabs also have references from the course module, so
# if we add one then we need to also add it to the policy information (i.e. metadata)
# we should remove this once we can break this reference from the course to static tabs
if category == 'static_tab':
display_name = display_name or _("Empty") # Prevent name being None
course = store.get_course(dest_usage_key.course_key)
course.tabs.append(
StaticTab(
name=display_name,
url_slug=dest_usage_key.name,
)
)
store.update_item(course, request.user.id)
return JsonResponse(
{"locator": unicode(created_block.location), "courseKey": unicode(created_block.location.course_key)}
)
def test_no_global_admin_write_access(self):
"""
Test that global admins have no write access
"""
self.assertFalse(has_studio_write_access(self.global_admin, self.ccx_course_key))
def xblock_view_handler(request, usage_key_string, view_name):
"""
The restful handler for requests for rendered xblock views.
Returns a json object containing two keys:
html: The rendered html of the view
resources: A list of tuples where the first element is the resource hash, and
the second is the resource description
"""
usage_key = usage_key_with_run(usage_key_string)
if not has_studio_read_access(request.user, usage_key.course_key):
raise PermissionDenied()
accept_header = request.META.get('HTTP_ACCEPT', 'application/json')
if 'application/json' in accept_header:
store = modulestore()
xblock = store.get_item(usage_key)
container_views = [
'container_preview', 'reorderable_container_child_preview',
'container_child_preview'
]
# wrap the generated fragment in the xmodule_editor div so that the javascript
# can bind to it correctly
xblock.runtime.wrappers.append(
partial(
wrap_xblock,
'StudioRuntime',
usage_id_serializer=unicode,
request_token=request_token(request),
))
if view_name in (STUDIO_VIEW, VISIBILITY_VIEW):
try:
fragment = xblock.render(view_name)
# catch exceptions indiscriminately, since after this point they escape the
# dungeon and surface as uneditable, unsaveable, and undeletable
# component-goblins.
except Exception as exc: # pylint: disable=broad-except
log.debug("Unable to render %s for %r",
view_name,
xblock,
exc_info=True)
fragment = Fragment(
render_to_string('html_error.html', {'message': str(exc)}))
elif view_name in (PREVIEW_VIEWS + container_views):
is_pages_view = view_name == STUDENT_VIEW # Only the "Pages" view uses student view in Studio
can_edit = has_studio_write_access(request.user,
usage_key.course_key)
# Determine the items to be shown as reorderable. Note that the view
# 'reorderable_container_child_preview' is only rendered for xblocks that
# are being shown in a reorderable container, so the xblock is automatically
# added to the list.
reorderable_items = set()
if view_name == 'reorderable_container_child_preview':
reorderable_items.add(xblock.location)
paging = None
try:
if request.REQUEST.get('enable_paging', 'false') == 'true':
paging = {
'page_number':
int(request.REQUEST.get('page_number', 0)),
'page_size': int(request.REQUEST.get('page_size', 0)),
}
except ValueError:
# pylint: disable=too-many-format-args
return HttpResponse(
content="Couldn't parse paging parameters: enable_paging: "
"{0}, page_number: {1}, page_size: {2}".format(
request.REQUEST.get('enable_paging', 'false'),
request.REQUEST.get('page_number', 0),
request.REQUEST.get('page_size', 0)),
status=400,
content_type="text/plain",
)
force_render = request.REQUEST.get('force_render', None)
# Set up the context to be passed to each XBlock's render method.
context = {
'is_pages_view':
is_pages_view, # This setting disables the recursive wrapping of xblocks
'is_unit_page': is_unit(xblock),
'can_edit': can_edit,
'root_xblock': xblock if
(view_name == 'container_preview') else None,
'reorderable_items': reorderable_items,
'paging': paging,
'force_render': force_render,
}
fragment = get_preview_fragment(request, xblock, context)
# Note that the container view recursively adds headers into the preview fragment,
# so only the "Pages" view requires that this extra wrapper be included.
if is_pages_view:
fragment.content = render_to_string(
'component.html', {
'xblock_context':
context,
'xblock':
xblock,
'locator':
usage_key,
'preview':
fragment.content,
'label':
xblock.display_name or xblock.scope_ids.block_type,
})
else:
raise Http404
hashed_resources = OrderedDict()
for resource in fragment.resources:
hashed_resources[hash_resource(resource)] = resource
return JsonResponse({
'html': fragment.content,
'resources': hashed_resources.items()
})
else:
return HttpResponse(status=406)
def xblock_handler(request, usage_key_string):
"""
The restful handler for xblock requests.
DELETE
json: delete this xblock instance from the course.
GET
json: returns representation of the xblock (locator id, data, and metadata).
if ?fields=graderType, it returns the graderType for the unit instead of the above.
html: returns HTML for rendering the xblock (which includes both the "preview" view and the "editor" view)
PUT or POST or PATCH
json: if xblock locator is specified, update the xblock instance. The json payload can contain
these fields, all optional:
:data: the new value for the data.
:children: the unicode representation of the UsageKeys of children for this xblock.
:metadata: new values for the metadata fields. Any whose values are None will be deleted not set
to None! Absent ones will be left alone.
:nullout: which metadata fields to set to None
:graderType: change how this unit is graded
:publish: can be:
'make_public': publish the content
'republish': publish this item *only* if it was previously published
'discard_changes' - reverts to the last published version
Note: If 'discard_changes', the other fields will not be used; that is, it is not possible
to update and discard changes in a single operation.
The JSON representation on the updated xblock (minus children) is returned.
if usage_key_string is not specified, create a new xblock instance, either by duplicating
an existing xblock, or creating an entirely new one. The json playload can contain
these fields:
:parent_locator: parent for new xblock, required for both duplicate and create new instance
:duplicate_source_locator: if present, use this as the source for creating a duplicate copy
:category: type of xblock, required if duplicate_source_locator is not present.
:display_name: name for new xblock, optional
:boilerplate: template name for populating fields, optional and only used
if duplicate_source_locator is not present
The locator (unicode representation of a UsageKey) for the created xblock (minus children) is returned.
"""
if usage_key_string:
usage_key = usage_key_with_run(usage_key_string)
access_check = has_studio_read_access if request.method == 'GET' else has_studio_write_access
if not access_check(request.user, usage_key.course_key):
raise PermissionDenied()
if request.method == 'GET':
accept_header = request.META.get('HTTP_ACCEPT', 'application/json')
if 'application/json' in accept_header:
fields = request.REQUEST.get('fields', '').split(',')
if 'graderType' in fields:
# right now can't combine output of this w/ output of _get_module_info, but worthy goal
return JsonResponse(
CourseGradingModel.get_section_grader_type(usage_key))
# TODO: pass fields to _get_module_info and only return those
with modulestore().bulk_operations(usage_key.course_key):
response = _get_module_info(
_get_xblock(usage_key, request.user))
return JsonResponse(response)
else:
return HttpResponse(status=406)
elif request.method == 'DELETE':
_delete_item(usage_key, request.user)
return JsonResponse()
else: # Since we have a usage_key, we are updating an existing xblock.
return _save_xblock(
request.user,
_get_xblock(usage_key, request.user),
data=request.json.get('data'),
children_strings=request.json.get('children'),
metadata=request.json.get('metadata'),
nullout=request.json.get('nullout'),
grader_type=request.json.get('graderType'),
publish=request.json.get('publish'),
)
elif request.method in ('PUT', 'POST'):
if 'duplicate_source_locator' in request.json:
parent_usage_key = usage_key_with_run(
request.json['parent_locator'])
duplicate_source_usage_key = usage_key_with_run(
request.json['duplicate_source_locator'])
source_course = duplicate_source_usage_key.course_key
dest_course = parent_usage_key.course_key
if (not has_studio_write_access(request.user, dest_course) or
not has_studio_read_access(request.user, source_course)):
raise PermissionDenied()
dest_usage_key = _duplicate_item(
parent_usage_key,
duplicate_source_usage_key,
request.user,
request.json.get('display_name'),
)
return JsonResponse({
"locator": unicode(dest_usage_key),
"courseKey": unicode(dest_usage_key.course_key)
})
else:
return _create_item(request)
else:
return HttpResponseBadRequest(
"Only instance creation is supported without a usage key.",
content_type="text/plain")
def xblock_handler(request, usage_key_string):
"""
The restful handler for xblock requests.
DELETE
json: delete this xblock instance from the course.
GET
json: returns representation of the xblock (locator id, data, and metadata).
if ?fields=graderType, it returns the graderType for the unit instead of the above.
html: returns HTML for rendering the xblock (which includes both the "preview" view and the "editor" view)
PUT or POST or PATCH
json: if xblock locator is specified, update the xblock instance. The json payload can contain
these fields, all optional:
:data: the new value for the data.
:children: the unicode representation of the UsageKeys of children for this xblock.
:metadata: new values for the metadata fields. Any whose values are None will be deleted not set
to None! Absent ones will be left alone.
:nullout: which metadata fields to set to None
:graderType: change how this unit is graded
:publish: can be:
'make_public': publish the content
'republish': publish this item *only* if it was previously published
'discard_changes' - reverts to the last published version
Note: If 'discard_changes', the other fields will not be used; that is, it is not possible
to update and discard changes in a single operation.
The JSON representation on the updated xblock (minus children) is returned.
if usage_key_string is not specified, create a new xblock instance, either by duplicating
an existing xblock, or creating an entirely new one. The json playload can contain
these fields:
:parent_locator: parent for new xblock, required for both duplicate and create new instance
:duplicate_source_locator: if present, use this as the source for creating a duplicate copy
:category: type of xblock, required if duplicate_source_locator is not present.
:display_name: name for new xblock, optional
:boilerplate: template name for populating fields, optional and only used
if duplicate_source_locator is not present
The locator (unicode representation of a UsageKey) for the created xblock (minus children) is returned.
"""
if usage_key_string:
usage_key = usage_key_with_run(usage_key_string)
access_check = has_studio_read_access if request.method == 'GET' else has_studio_write_access
if not access_check(request.user, usage_key.course_key):
raise PermissionDenied()
if request.method == 'GET':
accept_header = request.META.get('HTTP_ACCEPT', 'application/json')
if 'application/json' in accept_header:
fields = request.REQUEST.get('fields', '').split(',')
if 'graderType' in fields:
# right now can't combine output of this w/ output of _get_module_info, but worthy goal
return JsonResponse(CourseGradingModel.get_section_grader_type(usage_key))
# TODO: pass fields to _get_module_info and only return those
with modulestore().bulk_operations(usage_key.course_key):
response = _get_module_info(_get_xblock(usage_key, request.user))
return JsonResponse(response)
else:
return HttpResponse(status=406)
elif request.method == 'DELETE':
_delete_item(usage_key, request.user)
return JsonResponse()
else: # Since we have a usage_key, we are updating an existing xblock.
return _save_xblock(
request.user,
_get_xblock(usage_key, request.user),
data=request.json.get('data'),
children_strings=request.json.get('children'),
metadata=request.json.get('metadata'),
nullout=request.json.get('nullout'),
grader_type=request.json.get('graderType'),
publish=request.json.get('publish'),
)
elif request.method in ('PUT', 'POST'):
if 'duplicate_source_locator' in request.json:
parent_usage_key = usage_key_with_run(request.json['parent_locator'])
duplicate_source_usage_key = usage_key_with_run(request.json['duplicate_source_locator'])
source_course = duplicate_source_usage_key.course_key
dest_course = parent_usage_key.course_key
if (
not has_studio_write_access(request.user, dest_course) or
not has_studio_read_access(request.user, source_course)
):
raise PermissionDenied()
dest_usage_key = _duplicate_item(
parent_usage_key,
duplicate_source_usage_key,
request.user,
request.json.get('display_name'),
)
return JsonResponse({"locator": unicode(dest_usage_key), "courseKey": unicode(dest_usage_key.course_key)})
else:
return _create_item(request)
else:
return HttpResponseBadRequest(
"Only instance creation is supported without a usage key.",
content_type="text/plain"
)
def test_no_staff_write_access(self):
"""
Test that course staff have no write access
"""
self.assertFalse(has_studio_write_access(self.staff, self.ccx_course_key))
def xblock_view_handler(request, usage_key_string, view_name):
"""
The restful handler for requests for rendered xblock views.
Returns a json object containing two keys:
html: The rendered html of the view
resources: A list of tuples where the first element is the resource hash, and
the second is the resource description
"""
usage_key = usage_key_with_run(usage_key_string)
if not has_studio_read_access(request.user, usage_key.course_key):
raise PermissionDenied()
accept_header = request.META.get('HTTP_ACCEPT', 'application/json')
if 'application/json' in accept_header:
store = modulestore()
xblock = store.get_item(usage_key)
container_views = ['container_preview', 'reorderable_container_child_preview', 'container_child_preview']
# wrap the generated fragment in the xmodule_editor div so that the javascript
# can bind to it correctly
xblock.runtime.wrappers.append(partial(
wrap_xblock,
'StudioRuntime',
usage_id_serializer=unicode,
request_token=request_token(request),
))
if view_name in (STUDIO_VIEW, VISIBILITY_VIEW):
try:
fragment = xblock.render(view_name)
# catch exceptions indiscriminately, since after this point they escape the
# dungeon and surface as uneditable, unsaveable, and undeletable
# component-goblins.
except Exception as exc: # pylint: disable=broad-except
log.debug("Unable to render %s for %r", view_name, xblock, exc_info=True)
fragment = Fragment(render_to_string('html_error.html', {'message': str(exc)}))
elif view_name in PREVIEW_VIEWS + container_views:
is_pages_view = view_name == STUDENT_VIEW # Only the "Pages" view uses student view in Studio
can_edit = has_studio_write_access(request.user, usage_key.course_key)
# Determine the items to be shown as reorderable. Note that the view
# 'reorderable_container_child_preview' is only rendered for xblocks that
# are being shown in a reorderable container, so the xblock is automatically
# added to the list.
reorderable_items = set()
if view_name == 'reorderable_container_child_preview':
reorderable_items.add(xblock.location)
paging = None
try:
if request.REQUEST.get('enable_paging', 'false') == 'true':
paging = {
'page_number': int(request.REQUEST.get('page_number', 0)),
'page_size': int(request.REQUEST.get('page_size', 0)),
}
except ValueError:
# pylint: disable=too-many-format-args
return HttpResponse(
content="Couldn't parse paging parameters: enable_paging: "
"{0}, page_number: {1}, page_size: {2}".format(
request.REQUEST.get('enable_paging', 'false'),
request.REQUEST.get('page_number', 0),
request.REQUEST.get('page_size', 0)
),
status=400,
content_type="text/plain",
)
force_render = request.REQUEST.get('force_render', None)
# Set up the context to be passed to each XBlock's render method.
context = {
'is_pages_view': is_pages_view, # This setting disables the recursive wrapping of xblocks
'is_unit_page': is_unit(xblock),
'can_edit': can_edit,
'root_xblock': xblock if (view_name == 'container_preview') else None,
'reorderable_items': reorderable_items,
'paging': paging,
'force_render': force_render,
}
fragment = get_preview_fragment(request, xblock, context)
# Note that the container view recursively adds headers into the preview fragment,
# so only the "Pages" view requires that this extra wrapper be included.
if is_pages_view:
fragment.content = render_to_string('component.html', {
'xblock_context': context,
'xblock': xblock,
'locator': usage_key,
'preview': fragment.content,
'label': xblock.display_name or xblock.scope_ids.block_type,
})
else:
raise Http404
hashed_resources = OrderedDict()
for resource in fragment.resources:
hashed_resources[hash_resource(resource)] = resource
return JsonResponse({
'html': fragment.content,
'resources': hashed_resources.items()
})
else:
return HttpResponse(status=406)
def can_write(self, course_key):
""" Does the user have read access to the given course/library? """
return has_studio_write_access(self._request.user, course_key)
def student_view(self, context):
"""
Show all knotes for the current user and the owner(s) which are in public state.
"""
student = self.__get_current_user()
comment = KNoteList.objects.get_or_create_note_list(student, self.__get_xblock_key())
"""Find all knotes ordered by seconds"""
timecoded_data_set = self.__list_notes()
timecoded_data_array = []
for timecoded_data in timecoded_data_set:
"""Convert Knote objects (python) to Knote objects (Javascript) """
obj = {"time": timecoded_data.seconds, "value":timecoded_data.content, "user": self.scope_ids.user_id , "public": timecoded_data.is_public, "mine": (self.scope_ids.user_id == timecoded_data.timecoded_comment.user.pk) , "id": timecoded_data.id}
timecoded_data_array.append(obj)
# Load the HTML fragment from within the package and fill in the template
html_str = pkg_resources.resource_string(__name__, "static/html/videoknotes.html")
frag = Fragment(unicode(html_str).format(self=self, href=self.href, comment_id=comment.pk))
css_str = pkg_resources.resource_string(__name__, "static/css/style.css")
frag.add_css(unicode(css_str))
frag.add_javascript_url("http://api.dmcdn.net/all.js")
frag.add_javascript_url("https://www.youtube.com/iframe_api")
javascript_array = ["static/js/core/KNotesListener.js", "static/js/core/KNote.js",
"static/js/core/KNotesIterator.js", "static/js/core/KNotesList.js", "static/js/players/PlayerFactory.js", "static/js/players/DailymotionAdapter.js",
"static/js/players/YoutubeAdapter.js",
"static/js/core/KNotesView.js", "static/js/core/KNotesPlugin.js",
"static/vendors/swfobject.js"]
for element in javascript_array:
js_str = pkg_resources.resource_string(__name__, element)
frag.add_javascript(unicode(js_str))
js_str = pkg_resources.resource_string(__name__, "static/js/videoknotes.js")
frag.add_javascript(unicode(js_str))
frag.initialize_js('VideoKNotesBlock', {"video" : self.href, "notes" : timecoded_data_array, "can_publish" : has_studio_write_access(student, self.scope_ids.usage_id.course_key)})
return frag
def test_no_staff_write_access(self):
"""
Test that course staff have no write access
"""
self.assertFalse(
has_studio_write_access(self.staff, self.ccx_course_key))
def test_no_global_admin_write_access(self):
"""
Test that global admins have no write access
"""
self.assertFalse(
has_studio_write_access(self.global_admin, self.ccx_course_key))
