def start_flow(pctx, flow_identifier):
request = pctx.request
now_datetime = get_now_or_fake_time(request)
fctx = FlowContext(pctx.repo, pctx.course, flow_identifier,
participation=pctx.participation)
current_access_rule = fctx.get_current_access_rule(
None, pctx.role, pctx.participation, now_datetime)
may_view = flow_permission.view in current_access_rule.permissions
have_in_progress_session = (FlowSession.objects
.filter(
participation=pctx.participation,
flow_id=fctx.flow_identifier,
in_progress=True,
participation__isnull=False,
)).count() > 0
past_sessions = (FlowSession.objects
.filter(
participation=pctx.participation,
flow_id=fctx.flow_identifier,
participation__isnull=False)
.order_by("start_time"))
past_session_count = past_sessions.count()
if current_access_rule.allowed_session_count is not None:
allowed_another_session = (
past_session_count < current_access_rule.allowed_session_count)
else:
allowed_another_session = True
if request.method == "POST":
from course.content import set_up_flow_session_page_data
resume_match = None
for post_key in request.POST:
resume_match = RESUME_RE.match(post_key)
if resume_match is not None:
break
if resume_match is not None:
resume_session_id = int(resume_match.group(1))
resume_session = get_object_or_404(FlowSession, pk=resume_session_id)
if resume_session.participation != pctx.participation:
raise PermissionDenied("not your session")
if not may_view:
raise PermissionDenied("may not resume session without "
"'view' permission")
if resume_session.participation is None:
raise PermissionDenied("can't resume anonymous session")
if resume_session.flow_id != fctx.flow_identifier:
raise SuspiciousOperation("flow id mismatch on resume")
if not (flow_permission.view_past in current_access_rule.permissions
or resume_session.in_progress):
raise PermissionDenied("not allowed to resume session")
request.session["flow_session_id"] = resume_session_id
return redirect("course.flow.view_flow_page",
pctx.course.identifier,
flow_identifier,
0)
elif ("start_no_credit" in request.POST
or "start_credit" in request.POST):
if not may_view:
raise PermissionDenied("may not start session without "
"'view' permission")
if not allowed_another_session:
raise PermissionDenied("new session would exceed "
"allowed session count limit exceed")
if have_in_progress_session:
raise PermissionDenied("cannot start flow when other flow "
"session is already in progress")
session = FlowSession()
session.course = fctx.course
session.participation = pctx.participation
session.active_git_commit_sha = fctx.flow_commit_sha.decode()
session.flow_id = flow_identifier
session.in_progress = True
session.for_credit = "start_credit" in request.POST
session.access_rules_id = current_access_rule.id
session.save()
request.session["flow_session_id"] = session.id
page_count = set_up_flow_session_page_data(fctx.repo, session,
pctx.course.identifier, fctx.flow_desc, fctx.flow_commit_sha)
session.page_count = page_count
session.save()
return redirect("course.flow.view_flow_page",
pctx.course.identifier,
flow_identifier,
0)
else:
raise SuspiciousOperation("unrecognized POST action")
else:
may_start_credit = (
may_view
and not have_in_progress_session
and allowed_another_session
and flow_permission.start_credit in current_access_rule.permissions)
may_start_no_credit = (
may_view
and not have_in_progress_session
and allowed_another_session
and (flow_permission.start_no_credit
in current_access_rule.permissions))
may_review = (
may_view
and flow_permission.view_past in current_access_rule.permissions)
if hasattr(fctx.flow_desc, "grade_aggregation_strategy"):
from course.models import GRADE_AGGREGATION_STRATEGY_CHOICES
grade_aggregation_strategy_text = (
dict(GRADE_AGGREGATION_STRATEGY_CHOICES)
[fctx.flow_desc.grade_aggregation_strategy])
else:
grade_aggregation_strategy_text = None
# {{{ fish out relevant rules
from course.utils import (
get_flow_access_rules,
get_relevant_rules)
rules = get_flow_access_rules(fctx.course, pctx.participation,
flow_identifier, fctx.flow_desc)
# }}}
return render_course_page(pctx, "course/flow-start.html", {
"flow_desc": fctx.flow_desc,
"grade_aggregation_strategy":
grade_aggregation_strategy_text,
"flow_identifier": flow_identifier,
"rules": get_relevant_rules(rules, pctx.role, now_datetime),
"now": now_datetime,
"may_start_credit": may_start_credit,
"may_start_no_credit": may_start_no_credit,
"may_review": may_review,
"past_sessions": past_sessions,
},
allow_instant_flow_requests=False)
def start_flow(request, course_identifier, flow_identifier):
fctx = FlowContext(request, course_identifier, flow_identifier)
from course.models import flow_permission
if flow_permission.view not in fctx.permissions:
raise PermissionDenied()
have_in_progress_session = (FlowSession.objects
.filter(
participation=fctx.participation,
flow_id=fctx.flow_identifier,
in_progress=True,
participation__isnull=False,
)).count() > 0
past_sessions = (FlowSession.objects
.filter(
participation=fctx.participation,
flow_id=fctx.flow_identifier,
participation__isnull=False)
.order_by("start_time"))
past_session_count = past_sessions.count()
if hasattr(fctx.stipulations, "allowed_session_count"):
allowed_another_session = (
past_session_count < fctx.stipulations.allowed_session_count)
else:
allowed_another_session = True
if request.method == "POST":
from course.content import set_up_flow_session_page_data
resume_match = None
for post_key in request.POST:
resume_match = RESUME_RE.match(post_key)
if resume_match is not None:
break
if resume_match is not None:
resume_session_id = int(resume_match.group(1))
resume_session = get_object_or_404(FlowSession, pk=resume_session_id)
if resume_session.participation != fctx.participation:
raise PermissionDenied("not your session")
if resume_session.participation is None:
raise PermissionDenied("can't resume anonymous session")
if resume_session.flow_id != fctx.flow_identifier:
raise SuspiciousOperation("flow id mismatch on resume")
if not (flow_permission.view_past in fctx.permissions
or resume_session.in_progress):
raise PermissionDenied("not allowed to resume session")
request.session["flow_session_id"] = resume_session_id
return redirect("course.flow.view_flow_page",
course_identifier,
flow_identifier,
0)
elif ("start_no_credit" in request.POST
or "start_credit" in request.POST):
if not allowed_another_session:
raise PermissionDenied("new session would exceed "
"allowed session count limit exceed")
if have_in_progress_session:
raise PermissionDenied("cannot start flow when other flow "
"is already in progress")
session = FlowSession()
session.course = fctx.course
session.participation = fctx.participation
session.active_git_commit_sha = fctx.flow_commit_sha.decode()
session.flow_id = flow_identifier
session.in_progress = True
session.for_credit = "start_credit" in request.POST
session.save()
request.session["flow_session_id"] = session.id
page_count = set_up_flow_session_page_data(fctx.repo, session,
course_identifier, fctx.flow_desc, fctx.flow_commit_sha)
session.page_count = page_count
session.save()
return redirect("course.flow.view_flow_page",
course_identifier,
flow_identifier,
0)
else:
raise SuspiciousOperation("unrecognized POST action")
else:
may_start_credit = (
not have_in_progress_session
and allowed_another_session
and flow_permission.start_credit in fctx.permissions)
may_start_no_credit = (
not have_in_progress_session
and allowed_another_session
and flow_permission.start_no_credit in fctx.permissions)
may_review = (
flow_permission.view_past in fctx.permissions)
if hasattr(fctx.flow_desc, "grade_aggregation_strategy"):
from course.models import GRADE_AGGREGATION_STRATEGY_CHOICES
grade_aggregation_strategy_text = (
dict(GRADE_AGGREGATION_STRATEGY_CHOICES)
[fctx.flow_desc.grade_aggregation_strategy])
else:
grade_aggregation_strategy_text = None
return render(request, "course/flow-start.html", {
"participation": fctx.participation,
"course_desc": fctx.course_desc,
"course": fctx.course,
"flow_desc": fctx.flow_desc,
"role": fctx.role,
"participation_role": participation_role,
"grade_aggregation_strategy":
grade_aggregation_strategy_text,
"flow_identifier": flow_identifier,
"may_start_credit": may_start_credit,
"may_start_no_credit": may_start_no_credit,
"may_review": may_review,
"past_sessions": past_sessions,
"stipulations": fctx.stipulations,
})