def view_flow_page(pctx, flow_session_id, ordinal):
request = pctx.request
ordinal = int(ordinal)
flow_session_id = int(flow_session_id)
flow_session = get_and_check_flow_session(pctx, flow_session_id)
flow_id = flow_session.flow_id
if flow_session is None:
messages.add_message(
request,
messages.WARNING,
_("No in-progress session record found for this flow. " "Redirected to flow start page."),
)
return redirect("relate-view_start_flow", pctx.course.identifier, flow_id)
try:
fpctx = FlowPageContext(
pctx.repo, pctx.course, flow_id, ordinal, participation=pctx.participation, flow_session=flow_session
)
except PageOrdinalOutOfRange:
return redirect("relate-view_flow_page", pctx.course.identifier, flow_session.id, flow_session.page_count - 1)
access_rule = get_session_access_rule(
flow_session, pctx.role, fpctx.flow_desc, get_now_or_fake_time(request), pctx.remote_address
)
permissions = fpctx.page.get_modified_permissions_for_page(access_rule.permissions)
if access_rule.message:
messages.add_message(request, messages.INFO, access_rule.message)
page_context = fpctx.page_context
page_data = fpctx.page_data
answer_data = None
grade_data = None
if flow_permission.view not in permissions:
raise PermissionDenied(_("not allowed to view flow"))
if request.method == "POST":
if "finish" in request.POST:
return redirect("relate-finish_flow_session_view", pctx.course.identifier, flow_session_id)
else:
submission_allowed = True
# reject answer update if permission not present
if flow_permission.submit_answer not in permissions:
messages.add_message(request, messages.ERROR, _("Answer submission not allowed."))
submission_allowed = False
# reject if previous answer was final
if (
fpctx.prev_answer_visit is not None
and fpctx.prev_answer_visit.is_submitted_answer
and flow_permission.change_answer not in permissions
):
messages.add_message(request, messages.ERROR, _("Already have final answer."))
submission_allowed = False
form = fpctx.page.post_form(
fpctx.page_context, fpctx.page_data.data, post_data=request.POST, files_data=request.FILES
)
pressed_button = get_pressed_button(form)
if submission_allowed and form.is_valid():
# {{{ form validated, process answer
messages.add_message(request, messages.INFO, _("Answer saved."))
page_visit = FlowPageVisit()
page_visit.flow_session = flow_session
page_visit.page_data = fpctx.page_data
page_visit.remote_address = request.META["REMOTE_ADDR"]
answer_data = page_visit.answer = fpctx.page.answer_data(
fpctx.page_context, fpctx.page_data.data, form, request.FILES
)
page_visit.is_submitted_answer = pressed_button == "submit"
page_visit.save()
answer_was_graded = page_visit.is_submitted_answer
may_change_answer = not answer_was_graded or flow_permission.change_answer in permissions
if fpctx.page.is_answer_gradable():
feedback = fpctx.page.grade(page_context, page_data.data, page_visit.answer, grade_data=None)
if page_visit.is_submitted_answer:
grade = FlowPageVisitGrade()
grade.visit = page_visit
grade.max_points = fpctx.page.max_points(page_data.data)
grade.graded_at_git_commit_sha = pctx.course_commit_sha
bulk_feedback_json = None
if feedback is not None:
grade.correctness = feedback.correctness
grade.feedback, bulk_feedback_json = feedback.as_json()
grade.save()
update_bulk_feedback(page_data, grade, bulk_feedback_json)
del grade
else:
feedback = None
if pressed_button == "save_and_next" and not will_receive_feedback(permissions):
return redirect("relate-view_flow_page", pctx.course.identifier, flow_session_id, fpctx.ordinal + 1)
elif pressed_button == "save_and_finish" and not will_receive_feedback(permissions):
return redirect("relate-finish_flow_session_view", pctx.course.identifier, flow_session_id)
else:
form = fpctx.page.make_form(page_context, page_data.data, page_visit.answer, not may_change_answer)
# continue at common flow page generation below
# }}}
del page_visit
else:
# form did not validate
create_flow_page_visit(request, flow_session, fpctx.page_data)
answer_was_graded = False
may_change_answer = True
# because we were allowed this far in by the check above
feedback = None
# continue at common flow page generation below
else:
create_flow_page_visit(request, flow_session, fpctx.page_data)
if fpctx.prev_answer_visit is not None:
answer_was_graded = fpctx.prev_answer_visit.is_submitted_answer
else:
answer_was_graded = False
may_change_answer = (
(not answer_was_graded or (flow_permission.change_answer in permissions))
# can happen if no answer was ever saved
and flow_session.in_progress
and (flow_permission.submit_answer in permissions)
)
if fpctx.page.expects_answer():
if fpctx.prev_answer_visit is not None:
answer_data = fpctx.prev_answer_visit.answer
most_recent_grade = fpctx.prev_answer_visit.get_most_recent_grade()
if most_recent_grade is not None:
feedback = get_feedback_for_grade(most_recent_grade)
grade_data = most_recent_grade.grade_data
else:
feedback = None
grade_data = None
else:
feedback = None
form = fpctx.page.make_form(page_context, page_data.data, answer_data, not may_change_answer)
else:
form = None
feedback = None
# start common flow page generation
# defined at this point:
# form, form_html, may_change_answer, answer_was_graded, feedback
if form is not None and may_change_answer:
form = add_buttons_to_form(form, fpctx, flow_session, permissions)
show_correctness = None
show_answer = None
shown_feedback = None
if fpctx.page.expects_answer() and answer_was_graded:
show_correctness = flow_permission.see_correctness in permissions
show_answer = flow_permission.see_answer_after_submission in permissions
if show_correctness or show_answer:
shown_feedback = feedback
elif fpctx.page.expects_answer() and not answer_was_graded:
# Don't show answer yet
show_answer = flow_permission.see_answer_before_submission in permissions
else:
show_answer = (
flow_permission.see_answer_before_submission in permissions
or flow_permission.see_answer_after_submission in permissions
)
title = fpctx.page.title(page_context, page_data.data)
body = fpctx.page.body(page_context, page_data.data)
if show_answer:
correct_answer = fpctx.page.correct_answer(page_context, page_data.data, answer_data, grade_data)
else:
correct_answer = None
# {{{ render flow page
if form is not None:
form_html = fpctx.page.form_to_html(pctx.request, page_context, form, answer_data)
else:
form_html = None
expiration_mode_choices = []
for key, descr in FLOW_SESSION_EXPIRATION_MODE_CHOICES:
if is_expiration_mode_allowed(key, permissions):
expiration_mode_choices.append((key, descr))
args = {
"flow_identifier": fpctx.flow_id,
"flow_desc": fpctx.flow_desc,
"ordinal": fpctx.ordinal,
"page_data": fpctx.page_data,
"percentage": int(100 * (fpctx.ordinal + 1) / flow_session.page_count),
"flow_session": flow_session,
"page_numbers": zip(range(flow_session.page_count), range(1, flow_session.page_count + 1)),
"title": title,
"body": body,
"form": form,
"form_html": form_html,
"feedback": shown_feedback,
"correct_answer": correct_answer,
"show_correctness": show_correctness,
"may_change_answer": may_change_answer,
"may_change_graded_answer": ((flow_permission.change_answer in permissions) and flow_session.in_progress),
"will_receive_feedback": will_receive_feedback(permissions),
"show_answer": show_answer,
"expiration_mode_choices": expiration_mode_choices,
"expiration_mode_choice_count": len(expiration_mode_choices),
"expiration_mode": flow_session.expiration_mode,
}
if fpctx.page.expects_answer() and fpctx.page.is_answer_gradable():
args["max_points"] = fpctx.page.max_points(fpctx.page_data)
return render_course_page(pctx, "course/flow-page.html", args, allow_instant_flow_requests=False)
def view_flow_page(pctx, flow_identifier, ordinal):
request = pctx.request
flow_session = find_current_flow_session(
request, pctx.course, flow_identifier)
if flow_session is None:
messages.add_message(request, messages.WARNING,
"No in-progress session record found for this flow. "
"Redirected to flow start page.")
return redirect("course.flow.start_flow",
pctx.course.identifier,
flow_identifier)
fpctx = FlowPageContext(pctx.repo, pctx.course, flow_identifier, ordinal,
participation=pctx.participation,
flow_session=flow_session)
if fpctx.page_desc is None:
messages.add_message(request, messages.ERROR,
"Your session does not match the course content and needs "
"to be reset. Course staff have been notified about this issue. "
"Please get in touch with them to get help.")
from django.template.loader import render_to_string
message = render_to_string("course/session-mismatch.txt", {
"page_data": fpctx.page_data,
"course": pctx.course,
"user": pctx.request.user,
})
from django.core.mail import send_mail
from django.conf import settings
send_mail("[%s] session mismatch with course content"
% pctx.course.identifier,
message,
settings.ROBOT_EMAIL_FROM,
recipient_list=[pctx.course.email])
return redirect("course.flow.start_flow",
pctx.course.identifier,
flow_identifier)
current_access_rule = fpctx.get_current_access_rule(
flow_session, pctx.role, pctx.participation,
get_now_or_fake_time(request))
permissions = fpctx.page.get_modified_permissions_for_page(
current_access_rule.permissions)
page_context = fpctx.page_context
page_data = fpctx.page_data
answer_data = None
grade_data = None
if flow_permission.view not in permissions:
raise PermissionDenied("not allowed to view flow")
if request.method == "POST":
if "finish" in request.POST:
return redirect("course.flow.finish_flow_session_view",
pctx.course.identifier, flow_identifier)
else:
# reject answer update if flow is not in-progress
if not flow_session.in_progress:
raise PermissionDenied("session is not in progress")
# reject if previous answer was final
if (fpctx.prev_answer_visit is not None
and fpctx.prev_answer_visit.is_graded_answer
and flow_permission.change_answer
not in permissions):
raise PermissionDenied("already have final answer")
form = fpctx.page.post_form(
fpctx.page_context, fpctx.page_data.data,
post_data=request.POST, files_data=request.FILES)
pressed_button = get_pressed_button(form)
if form.is_valid():
# {{{ form validated, process answer
messages.add_message(request, messages.INFO,
"Answer saved.")
page_visit = FlowPageVisit()
page_visit.flow_session = flow_session
page_visit.page_data = fpctx.page_data
page_visit.remote_address = request.META['REMOTE_ADDR']
answer_data = page_visit.answer = fpctx.page.answer_data(
fpctx.page_context, fpctx.page_data.data,
form, request.FILES)
page_visit.is_graded_answer = pressed_button == "submit"
page_visit.save()
answer_was_graded = page_visit.is_graded_answer
may_change_answer = (
not answer_was_graded
or flow_permission.change_answer
in permissions)
feedback = fpctx.page.grade(
page_context, page_data.data, page_visit.answer,
grade_data=None)
if page_visit.is_graded_answer:
grade = FlowPageVisitGrade()
grade.visit = page_visit
grade.max_points = fpctx.page.max_points(page_data.data)
grade.graded_at_git_commit_sha = fpctx.flow_commit_sha
if feedback is not None:
grade.correctness = feedback.correctness
grade.feedback = feedback.as_json()
grade.save()
del grade
if (pressed_button == "save_and_next"
and not will_receive_feedback(permissions)):
return redirect("course.flow.view_flow_page",
pctx.course.identifier,
flow_identifier,
fpctx.ordinal + 1)
elif (pressed_button == "save_and_finish"
and not will_receive_feedback(permissions)):
return redirect("course.flow.finish_flow_session_view",
pctx.course.identifier, flow_identifier)
else:
form = fpctx.page.make_form(
page_context, page_data.data,
page_visit.answer, not may_change_answer)
# continue at common flow page generation below
# }}}
del page_visit
else:
# form did not validate
create_flow_page_visit(request, flow_session, fpctx.page_data)
answer_was_graded = False
may_change_answer = True
# because we were allowed this far in by the check above
feedback = None
# continue at common flow page generation below
else:
create_flow_page_visit(request, flow_session, fpctx.page_data)
if fpctx.prev_answer_visit is not None:
answer_was_graded = fpctx.prev_answer_visit.is_graded_answer
else:
answer_was_graded = False
may_change_answer = (
(not answer_was_graded
or (flow_permission.change_answer in permissions))
# can happen if no answer was ever saved
and flow_session.in_progress)
if fpctx.page.expects_answer():
if fpctx.prev_answer_visit is not None:
answer_data = fpctx.prev_answer_visit.answer
most_recent_grade = fpctx.prev_answer_visit.get_most_recent_grade()
if most_recent_grade is not None:
if most_recent_grade.feedback is not None:
from course.page import AnswerFeedback
feedback = AnswerFeedback.from_json(
most_recent_grade.feedback)
else:
feedback = None
grade_data = most_recent_grade.grade_data
else:
feedback = None
grade_data = None
else:
feedback = None
form = fpctx.page.make_form(
page_context, page_data.data,
answer_data, not may_change_answer)
else:
form = None
feedback = None
# start common flow page generation
# defined at this point:
# form, form_html, may_change_answer, answer_was_graded, feedback
if form is not None and may_change_answer:
form = add_buttons_to_form(form, fpctx, flow_session,
permissions)
show_correctness = None
show_answer = None
shown_feedback = None
if fpctx.page.expects_answer() and answer_was_graded:
show_correctness = (
flow_permission.see_correctness in permissions
or (
(flow_permission.see_correctness_after_completion
in permissions)
and not flow_session.in_progress))
show_answer = flow_permission.see_answer in permissions
if show_correctness or show_answer:
shown_feedback = feedback
elif fpctx.page.expects_answer() and not answer_was_graded:
# Don't show answer yet
pass
else:
show_answer = flow_permission.see_answer in permissions
title = fpctx.page.title(page_context, page_data.data)
body = fpctx.page.body(page_context, page_data.data)
if show_answer:
correct_answer = fpctx.page.correct_answer(
page_context, page_data.data,
answer_data, grade_data)
else:
correct_answer = None
# {{{ render flow page
if form is not None:
form_html = fpctx.page.form_to_html(
pctx.request, page_context, form, answer_data)
else:
form_html = None
args = {
"flow_identifier": fpctx.flow_identifier,
"flow_desc": fpctx.flow_desc,
"ordinal": fpctx.ordinal,
"page_data": fpctx.page_data,
"percentage": int(100*(fpctx.ordinal+1) / flow_session.page_count),
"flow_session": flow_session,
"title": title, "body": body,
"form": form,
"form_html": form_html,
"feedback": shown_feedback,
"correct_answer": correct_answer,
"show_correctness": show_correctness,
"may_change_answer": may_change_answer,
"may_change_graded_answer": (
(flow_permission.change_answer
in permissions)
and flow_session.in_progress),
"will_receive_feedback": will_receive_feedback(permissions),
"show_answer": show_answer,
}
if fpctx.page.expects_answer():
args["max_points"] = fpctx.page.max_points(fpctx.page_data)
return render_course_page(
pctx, "course/flow-page.html", args,
allow_instant_flow_requests=False)
def view_flow_page(request, course_identifier, flow_identifier, ordinal):
flow_session = find_current_flow_session(request, flow_identifier)
if flow_session is None:
messages.add_message(request, messages.WARNING,
"No in-progress session record found for this flow. "
"Redirected to flow start page.")
return redirect("course.flow.start_flow",
course_identifier,
flow_identifier)
fpctx = FlowPageContext(request, course_identifier, flow_identifier,
ordinal, flow_session)
page_context = fpctx.page_context
page_data = fpctx.page_data
if flow_permission.view not in fpctx.permissions:
raise PermissionDenied("not allowed to view flow")
if request.method == "POST":
if "finish" in request.POST:
return redirect("course.flow.finish_flow_session_view",
course_identifier, flow_identifier)
else:
# reject answer update if flow is not in-progress
if not flow_session.in_progress:
raise PermissionDenied("session is not in progress")
# reject if previous answer was final
if (fpctx.prev_answer_visit is not None
and fpctx.prev_answer_visit.is_graded_answer
and flow_permission.change_answer not in fpctx.permissions):
raise PermissionDenied("already have final answer")
form, form_html = fpctx.page.post_form(
fpctx.page_context, fpctx.page_data.data,
post_data=request.POST, files_data=request.POST)
pressed_button = get_pressed_button(form)
if form.is_valid():
# {{{ form validated, process answer
messages.add_message(request, messages.INFO,
"Answer saved.")
page_visit = FlowPageVisit()
page_visit.flow_session = fpctx.flow_session
page_visit.page_data = fpctx.page_data
page_visit.remote_address = request.META['REMOTE_ADDR']
page_visit.answer = fpctx.page.answer_data(
fpctx.page_context, fpctx.page_data.data,
form)
page_visit.is_graded_answer = pressed_button == "submit"
page_visit.save()
answer_was_graded = page_visit.is_graded_answer
may_change_answer = (
not answer_was_graded
or flow_permission.change_answer in fpctx.permissions)
feedback = fpctx.page.grade(
page_context, page_data.data, page_visit.answer,
grade_data=None)
if page_visit.is_graded_answer:
grade = FlowPageVisitGrade()
grade.visit = page_visit
grade.max_points = fpctx.page.max_points(page_data.data)
if feedback is not None:
grade.correctness = feedback.correctness
grade.feedback = feedback.as_json()
grade.save()
del grade
if (pressed_button == "save_and_next"
and not fpctx.will_receive_feedback()):
return redirect("course.flow.view_flow_page",
course_identifier,
flow_identifier,
fpctx.ordinal + 1)
elif (pressed_button == "save_and_finish"
and not fpctx.will_receive_feedback()):
return redirect("course.flow.finish_flow_session_view",
course_identifier, flow_identifier)
else:
form, form_html = fpctx.page.make_form(
page_context, page_data.data,
page_visit.answer, not may_change_answer)
# continue at common flow page generation below
# }}}
del page_visit
else:
# form did not validate
fpctx.create_visit(request)
answer_was_graded = False
may_change_answer = True
# because we were allowed this far in by the check above
feedback = None
# continue at common flow page generation below
else:
fpctx.create_visit(request)
if fpctx.prev_answer_visit is not None:
answer_was_graded = fpctx.prev_answer_visit.is_graded_answer
else:
answer_was_graded = False
may_change_answer = (
(not answer_was_graded
or flow_permission.change_answer in fpctx.permissions)
# can happen if no answer was ever saved
and fpctx.flow_session.in_progress)
if fpctx.page.expects_answer():
if fpctx.prev_answer_visit is not None:
answer_data = fpctx.prev_answer_visit.answer
feedback = fpctx.prev_answer_visit.get_most_recent_feedback()
else:
answer_data = None
feedback = None
form, form_html = fpctx.page.make_form(
page_context, page_data.data,
answer_data, not may_change_answer)
else:
form = None
form_html = None
feedback = None
# start common flow page generation
# defined at this point:
# form, form_html, may_change_answer, answer_was_graded, feedback
if form is not None and may_change_answer:
form = add_buttons_to_form(fpctx, form)
show_correctness = None
show_answer = None
shown_feedback = None
if fpctx.page.expects_answer() and answer_was_graded:
show_correctness = flow_permission.see_correctness in fpctx.permissions
show_answer = flow_permission.see_answer in fpctx.permissions
if show_correctness or show_answer:
shown_feedback = feedback
title = fpctx.page.title(page_context, page_data.data)
body = fpctx.page.body(page_context, page_data.data)
# {{{ render flow page
if form is not None and form_html is None:
from crispy_forms.utils import render_crispy_form
from django.template import RequestContext
context = RequestContext(request, {})
form_html = render_crispy_form(form, context=context)
del context
args = {
"course": fpctx.course,
"course_desc": fpctx.course_desc,
"flow_identifier": fpctx.flow_identifier,
"flow_desc": fpctx.flow_desc,
"ordinal": fpctx.ordinal,
"page_data": fpctx.page_data,
"percentage": fpctx.percentage_done,
"flow_session": fpctx.flow_session,
"participation": fpctx.participation,
"role": fpctx.role,
"participation_role": participation_role,
"title": title, "body": body,
"form": form,
"form_html": form_html,
"feedback": shown_feedback,
"show_correctness": show_correctness,
"may_change_answer": may_change_answer,
"will_receive_feedback": fpctx.will_receive_feedback(),
"show_answer": show_answer,
}
if fpctx.page.expects_answer():
args["max_points"] = fpctx.page.max_points(fpctx.page_data)
return render(request, "course/flow-page.html", args)