def delete_task():
data = json.loads(request.data)
task_id = data['taskId']
db.connect()
submissions = db.select_columns('submissions', ['name'], ['task'],
[task_id])
if submissions:
db.close()
return error('Cannot delete this task!' +
'<br>Students have already made submissions')
task_path = db.select_columns('task_attachments', ['path'], ['task'],
[task_id])
if task_path:
file_upload = FileUpload(filename=task_path[0][0])
file_upload.remove_file()
db.delete_rows('tasks', ['id'], [task_id])
db.delete_rows('task_attachments', ['task'], [task_id])
db.delete_rows('task_criteria', ['task'], [task_id])
db.delete_rows('allowed_files', ['task'], [task_id])
db.delete_rows('submission_types', ['task'], [task_id])
db.close()
return jsonify({'status': 'ok', "message": "Task deleted"})
def delete_material():
data = json.loads(request.data)
material_id = data['materialId']
db.connect()
material_path = db.select_columns('material_attachments', ['path'],
['material'], [material_id])
if material_path:
file_upload = FileUpload(filename=material_path[0][0])
file_upload.remove_file()
db.delete_rows('materials', ['id'], [material_id])
db.delete_rows('material_attachments', ['material'], [material_id])
db.close()
return jsonify({'status': 'ok', "message": "Material deleted"})
def upload_enroll_file():
try:
enroll_file = FileUpload(req=request)
except KeyError:
return error('Could not find a file to upload')
if enroll_file.get_extention() != '.csv':
return error('File type must be in .csv format')
if enroll_file.get_size() > config.MAX_FILE_SIZE:
return error(
f'File exceeds the maximum size of {config.MAX_FILE_SIZE} MB')
enroll_file.commit()
db.connect()
error_string = update_from_file(enroll_file.get_path(),
session['current_co'], 'student')
db.close()
enroll_file.remove_file()
if error_string != "":
return error(error_string)
return jsonify({'status': 'ok'})
def upload_material():
try:
fields = [
'file-label', 'file-name', 'course-offering', 'old-material-id',
'delete-old-file'
]
file_label, file_name, course_offering, old_material_id, \
delete_old_file = \
get_fields(request.form, fields,
optional=['word-limit', 'file-name'],
ints=['course-offering'])
except ValueError as e:
return e.args[0]
try:
old_material_id = int(old_material_id)
except ValueError as e:
old_material_id = None
# check if no file when there should be one
if file_name == '' and \
(delete_old_file == 'true' or old_material_id is None):
return error('File is required!')
db.connect()
# check if course offering is valid
res = db.select_columns('course_offerings', ['id'], ['id'],
[course_offering])
if not len(res):
db.close()
return error('Cannot attach material to unknown course offering')
# check if material with same label exists in course
res = db.select_columns('materials', ['id'], ['name', 'course_offering'],
[file_label, course_offering])
if len(res) and old_material_id != res[0][0]:
db.close()
return error('An item with that label already exists in this course')
# otherwise, we can insert the material into the course
if len(file_name):
try:
sent_file = FileUpload(req=request)
except KeyError:
db.close()
return error('Could not find a file to upload')
res = db.select_columns('file_types', ['name'])
file_types = list(map(lambda x: x[0], res))
if sent_file.get_extention() not in file_types:
db.close()
accept_files = ', '.join(file_types)
return error(f'Accepted file types are: {accept_files}')
if sent_file.get_size() > config.MAX_FILE_SIZE:
sent_file.remove_file()
db.close()
return error(
f'File exceeds the maximum size of {config.MAX_FILE_SIZE} MB')
sent_file.commit()
if delete_old_file == 'true':
old = db.select_columns('material_attachments', ['path'], ['material'],
[old_material_id])
if old:
db.delete_rows('material_attachments', ['material'],
[old_material_id])
try:
prev_submission = FileUpload(filename=old[0][0])
prev_submission.remove_file()
except LookupError:
# If the file doesn't exists don't worry as we are deleting
# the attachment anyway
pass
if old_material_id is not None:
# update existing material entries
db.update_rows('materials', [file_label], ['name'], ['id'],
[old_material_id])
db.update_rows('materials', [file_label], ['name'], ['id'],
[old_material_id])
if delete_old_file == 'true':
db.insert_single(
'material_attachments',
[old_material_id, sent_file.get_name()], ['material', 'path'])
else:
# add material and file path to db
db.insert_single('materials', [course_offering, file_label, 0],
['course_offering', 'name', 'visible'])
res = db.select_columns('materials', ['id'],
['name', 'course_offering'],
[file_label, course_offering])
db.insert_single('material_attachments',
[res[0][0], sent_file.get_name()],
['material', 'path'])
db.close()
return jsonify({'status': 'ok'})
def create():
course_id = request.args.get('course_offering_id', None, type=int)
if request.method == 'GET':
if course_id is None:
abort(400)
db.connect()
res = db.select_columns('course_offerings', ['id'], ['id'],
[course_id])
if not len(res):
db.close()
abort(404)
file_types = db.select_columns('file_types', ['name'])
file_types = list(map(lambda x: x[0], file_types))
allowed_file_types = ','.join(file_types)
heading = 'Create Task'
default_fields = {
'task-name': '',
'deadline': '',
'task-description': '',
'submission-type': 'text',
'word-limit': '',
'maximum-file-size': '',
'accepted-file-type': '',
'marking-method': 'accept',
'criteria': [],
'task_attachments': []
}
# if updating old task then load old task data
old_task_id = request.args.get('update', None, type=int)
if old_task_id is not None:
res = queries.get_past_task_data(old_task_id)
if res is not None:
res = res[0]
heading = 'Edit Task'
# basic task details
default_fields['task-name'] = res[0]
time_format = '%d/%m/%Y %H:%M'
due_date = datetime.fromtimestamp(res[1])
default_fields['deadline'] = due_date.strftime(time_format)
default_fields['task-description'] = res[2]
attachments = db.select_columns('task_attachments', ['path'],
['task'], [old_task_id])
for r in attachments:
file = [FileUpload(filename=r[0])]
default_fields['task_attachments'] = file
# submission method specific
if res[3] == 'text submission':
default_fields['word-limit'] = res[4]
else:
default_fields['submission-type'] = 'file'
default_fields['maximum-file-size'] = int(res[5])
default_fields['accepted-file-type'] = res[6]
# marking method specifics
if res[7] == 'requires mark':
default_fields['marking-method'] = 'criteria'
crit = db.select_columns('task_criteria',
['name, max_mark'], ['task'],
[old_task_id])
if crit is not None:
default_fields['criteria'] = crit
db.close()
if default_fields['maximum-file-size'] == '':
default_fields['maximum-file-size'] = 5
if default_fields['accepted-file-type'] == '':
default_fields['accepted-file-type'] = '.pdf'
return render_template('create_task.html',
heading=heading,
title=heading,
file_types=file_types,
course_id=course_id,
max_file_size=config.MAX_FILE_SIZE,
max_word_limit=config.MAX_WORD_LIMIT,
accepted_file_types=allowed_file_types,
old_task_id=old_task_id,
default_fields=default_fields)
try:
fields = [
'task-name', 'deadline', 'task-description', 'submission-type',
'word-limit', 'maximum-file-size', 'accepted-file-type',
'marking-method', 'num-criteria', 'course-id', 'file-name',
'old_task_id', 'delete_old_attachment'
]
task_name, deadline, task_description, submission_type, \
word_limit, max_file_size, accepted_ftype, marking_method, \
num_criteria, course_id, file_name, old_task_id, \
delete_old_attachment = \
get_fields(request.form, fields,
optional=['word-limit', 'file-name'],
ints=['maximum-file-size', 'num-criteria',
'word-limit', 'course-id',
'delete_old_attachment'])
except ValueError as e:
return e.args[0]
try:
old_task_id = int(old_task_id)
except ValueError as e:
old_task_id = None
try:
deadline = datetime.strptime(deadline, '%d/%m/%Y %H:%M').timestamp()
except ValueError:
return error('Invalid date format for deadline!')
if submission_type == 'file':
max_size = config.MAX_FILE_SIZE
if not (1 <= max_file_size <= max_size):
return error(
f'Maximum file size must be between 1 and {max_size}!')
elif submission_type == 'text':
try:
word_limit = get_fields(request.form, ['word-limit'],
ints=['word-limit'])[0]
except ValueError as e:
return e.args[0]
max_word_limit = config.MAX_WORD_LIMIT
if not (1 <= word_limit <= max_word_limit):
return error(f'Word limit must be between 1 and {max_word_limit}!')
else:
return error('Unknown submission type!')
if marking_method == 'criteria':
if num_criteria < 1:
return error('At least one marking criterion is required!')
else:
criteria = [f'criteria-{i}' for i in range(1, num_criteria + 1)]
marks = [f'maximum-mark-{i}' for i in range(1, num_criteria + 1)]
try:
criteria = get_fields(request.form, criteria)
marks = get_fields(request.form, marks, ints=marks)
except ValueError as e:
return e.args[0]
if sum([mark for mark in marks]) != 100:
return error('Marks must add to 100!')
elif marking_method != 'accept':
return error('Unknown marking method!')
db.connect()
res = db.select_columns('course_offerings', ['id'], ['id'], [course_id])
if not len(res):
db.close()
return error('Cannot create task for unknown course!')
res = db.select_columns('tasks', ['id', 'name'],
['name', 'course_offering'],
[task_name, course_id])
if len(res) and res[0][0] != old_task_id:
db.close()
return error('A task with that name already exists in this course!')
# retrieve some foreign keys for insertion
res = db.select_columns('file_types', ['id'], ['name'], [accepted_ftype])
if not len(res):
db.close()
return error('Invalid or unsupported file type!')
file_type_id = res[0][0]
# upload file if present
sent_file = None
if len(file_name):
try:
sent_file = FileUpload(req=request)
except KeyError:
db.close()
return error('Could not find a file to upload')
res = db.select_columns('file_types', ['name'])
file_types = list(map(lambda x: x[0], res))
if sent_file.get_extention() not in file_types:
db.close()
accept_files = ', '.join(file_types)
return error(f'Accepted file types are: {accept_files}')
if sent_file.get_size() > config.MAX_FILE_SIZE:
sent_file.remove_file()
db.close()
return error(
f'File exceeds the maximum size of {config.MAX_FILE_SIZE} MB')
sent_file.commit()
if (len(file_name) and old_task_id is not None) or delete_old_attachment:
old = db.select_columns('task_attachments', ['path'], ['task'],
[old_task_id])
if old:
db.delete_rows('task_attachments', ['task'], [old_task_id])
try:
prev_submission = FileUpload(filename=old[0][0])
prev_submission.remove_file()
except LookupError:
# If the file doesn't exists don't worry as we are deleting
# the attachment anyway
pass
res = db.select_columns('submission_methods', ['id'], ['name'],
['{} submission'.format(submission_type)])
submission_method_id = res[0][0]
marking_method = 'approval' if marking_method == 'accept' else 'mark'
res = db.select_columns('marking_methods', ['id'], ['name'],
['requires {}'.format(marking_method)])
mark_method_id = res[0][0]
# commit task
if old_task_id is not None:
# update an existing task
db.update_rows('tasks', [
task_name, course_id, deadline, task_description, max_file_size,
submission_method_id, mark_method_id, word_limit
], [
'name', 'course_offering', 'deadline', 'description', 'size_limit',
'submission_method', 'marking_method', 'word_limit'
], ['id'], [old_task_id])
else:
# add a new task`
db.insert_single('tasks', [
task_name, course_id, deadline, task_description, max_file_size, 0,
submission_method_id, mark_method_id, word_limit
], [
'name', 'course_offering', 'deadline', 'description', 'size_limit',
'visible', 'submission_method', 'marking_method', 'word_limit'
])
res = db.select_columns('tasks', ['id'], ['name', 'course_offering'],
[task_name, course_id])
task_id = res[0][0]
if sent_file:
db.insert_single('task_attachments',
[task_id, sent_file.get_name()], ['task', 'path'])
# delete old entries in other tables
if old_task_id is not None:
db.delete_rows('submission_types', ['task'], [old_task_id])
res = db.select_columns('task_criteria', ['id'], ['task'],
[old_task_id])
for r in res:
db.delete_rows('marks', ['criteria'], [r[0]])
db.delete_rows('task_criteria', ['task'], [old_task_id])
# commit accepted file type
db.insert_single('submission_types', [file_type_id, task_id],
['file_type', 'task'])
# commit marking criteria
marking_criteria = []
if marking_method == 'approval':
marking_criteria.append(
('task_criteria', [task_id, 'Approval',
100], ['task', 'name', 'max_mark']))
else:
for i in range(len(criteria)):
marking_criteria.append(
('task_criteria', [task_id, criteria[i],
marks[i]], ['task', 'name', 'max_mark']))
db.insert_multiple(marking_criteria)
db.close()
return jsonify({'status': 'ok'})
def submit_file_task():
task_id = request.form.get('task', -1)
db.connect()
res = db.select_columns('tasks', [
'deadline', 'marking_method', 'visible', 'course_offering',
'size_limit'
], ['id'], [task_id])
if not res:
db.close()
return error("Task not found")
task = build_task(task_id)
res = db.select_columns('enrollments', ['user'],
['user', 'course_offering'],
[session['id'], task['offering']])
if not res:
db.close()
return error("User not enrolled in task's course")
if not request.form.get('certify', 'false') == 'true':
db.close()
return error("You must certify this is all your own work")
if datetime.now().timestamp() >= task['deadline']:
db.close()
return error("Submissions closed!<br>You can no longer submit")
if task['mark_method']['name'] == 'requires approval':
res = db.select_columns('request_statuses', ['id'], ['name'],
['pending'])
elif task['mark_method']['name'] == 'requires mark':
res = db.select_columns('request_statuses', ['id'], ['name'],
['pending mark'])
pending_status_id = res[0][0]
try:
sent_file = FileUpload(req=request)
except KeyError:
db.close()
return error("You must supply a file for submission")
if sent_file.get_extention() not in task['accepted_files']:
db.close()
accept_files = ', '.join([f[1:] for f in task['accepted_files']])
return error(f"File must be formatted as {accept_files}")
if sent_file.get_size() > task['file_limit']:
sent_file.remove_file()
db.close()
return error(
f'File exceeds the maximum size of {task["file_limit"]} MB')
sent_file.commit()
res = db.select_columns('submissions', ['path'], ['student', 'task'],
[session['id'], task['id']])
if res:
db.delete_rows('submissions', ['student', 'task'],
[session['id'], task['id']])
# If the file doesn't exists don't worry as we are deleting
# the submission anyway
try:
prev_submission = FileUpload(filename=res[0][0])
prev_submission.remove_file()
except LookupError:
pass
db.insert_single('submissions', [
session['id'], task['id'],
sent_file.get_original_name(),
str(sent_file.get_name()),
datetime.now().timestamp(), pending_status_id
], ['student', 'task', 'name', 'path', 'date_modified', 'status'])
db.close()
return jsonify({'status': 'ok'})