def getting_started(request, year, semester_type):
'''Intial top level page that greets users'''
try:
semester = Semester.objects.get(year=year, type=semester_type)
except Semester.DoesNotExist:
raise http.Http404
try:
next_semester = Semester.objects.next()
except Semester.DoesNotExist:
next_semester = None
if next_semester and next_semester == semester:
next_semester = None
# Redirect user to their timetable
if request.method == 'POST':
schedule_form = forms.ScheduleForm(request.POST)
if schedule_form.is_valid():
slug = schedule_form.cleaned_data['slug']
# TODO(adamcik): what should we do if current is empty?
return schedule_current(request, semester.year, semester.type, slug)
else:
schedule_form = forms.ScheduleForm()
context = Course.get_stats(semester=semester)
context.update({
'color_map': utils.ColorMap(hex=True),
'current': semester,
'next_semester': next_semester,
'schedule_form': schedule_form,
})
return shortcuts.render(request, 'start.html', context)
def about(request):
# Limit ourselves to 400 buckets to display within 940px - i.e. 2.3 pixels per sample.
cursor = connection.cursor()
cursor.execute('''
SELECT CAST(EXTRACT(EPOCH FROM MAX(s.added)) -
EXTRACT(EPOCH FROM MIN(s.added)) AS INTEGER)
FROM common_subscription s;''')
scale = cursor.fetchone()[0] / 400
# Fetch number of new subcriptions per time bucket:
cursor.execute('''
SELECT COUNT(*), bucket, semester_id FROM (
SELECT
cast(EXTRACT(EPOCH FROM date_trunc('day', min(s.added))) / %s as integer) AS bucket,
s.student_id,
c.semester_id
FROM common_subscription s
JOIN common_course c ON (c.id = s.course_id)
GROUP BY s.student_id, c.semester_id
) AS foo GROUP BY bucket, semester_id ORDER by semester_id, bucket;
''' % scale)
last_semester = None
colors = utils.ColorMap(hex=True)
fills, series = [], []
x, y, max_x, first = 0, 0, 0, 0
# Use zero indexing for x values to keep payload small.
for count, bucket, semester in cursor.fetchall():
if not first:
first = bucket - 1
if last_semester != semester:
last_semester = semester
x, y = (bucket - 1)-first, 0
series.append([(x,y)])
x, y = bucket - first, y+count
series[-1].append((x, y))
max_x = max(max_x, x)
for i, s in enumerate(series):
fills.append(colors[i])
s.append((max_x, s[-1][1]))
# TODO: we can further reduce this by just having one big array for
# everything and knowing the stride to use
# Pass on all data we need. First is needed to undo zero indexing, bucket
# size is needed to rescale x values to proper epochs.
return shortcuts.render(request, 'about.html', {
'data': html.mark_safe(json.dumps({
'series': series,
'fills': fills,
'first': first,
'scale': scale}, separators=(',',':'))),
})
def select_groups(request, year, semester_type, slug):
'''Form handler for selecting groups to use in schedule'''
courses = Course.objects.get_courses(year, semester_type, slug)
course_groups = Course.get_groups(year, semester_type,
[c.id for c in courses])
if request.method == 'POST':
with transaction.atomic():
for c in courses:
try:
groups = course_groups[c.id]
except KeyError: # Skip courses without groups
continue
group_form = forms.GroupForm(groups, request.POST, prefix=c.id)
if group_form.is_valid():
subscription = Subscription.objects.get_subscriptions(
year, semester_type, slug).get(course=c)
subscription.groups = group_form.cleaned_data['groups']
return shortcuts.redirect('schedule-advanced', year,
Semester.localize(semester_type), slug)
color_map = utils.ColorMap(hex=True)
subscription_groups = Subscription.get_groups(year, semester_type, slug)
all_subscripted_groups = set()
for groups in subscription_groups.values():
for group in groups:
all_subscripted_groups.add(group)
for c in courses:
color_map[c.id]
subscription_id = c.subscription_set.get(student__slug=slug).pk
try:
groups = course_groups[c.id]
except KeyError: # Skip courses without groups
continue
initial_groups = subscription_groups.get(subscription_id,
all_subscripted_groups)
c.group_form = forms.GroupForm(groups,
prefix=c.id,
initial={'groups': initial_groups})
return shortcuts.render(
request, 'select_groups.html', {
'semester': Semester(year=year, type=semester_type),
'slug': slug,
'courses': courses,
'color_map': color_map,
})
def schedule(request, year, semester_type, slug, advanced=False,
week=None, all=False):
'''Page that handels showing schedules'''
current_week = get_current_week()
if week:
week = int(week)
max_week = utils.max_number_of_weeks(year)
if week is not None:
if (week <= 0 or week > max_week):
raise http.Http404
# Color mapping for the courses
color_map = utils.ColorMap(hex=True)
try:
semester = Semester.objects.get(year=year, type=semester_type)
except Semester.DoesNotExist:
raise http.Http404
try:
student = Student.objects.distinct().get(slug=slug, subscription__course__semester=semester)
except Student.DoesNotExist:
student = None
# Start setting up queries
courses = Course.objects.get_courses(year, semester.type, slug)
lectures = Lecture.objects.get_lectures(year, semester.type, slug, week)
exams = {}
for exam in Exam.objects.get_exams(year, semester.type, slug):
exams.setdefault(exam.course_id, []).append(exam)
# Use get_related to cut query counts
lecturers = Lecture.get_related(Lecturer, lectures)
groups = Lecture.get_related(Group, lectures, fields=['code'])
rooms = Lecture.get_related(Room, lectures, fields=['name', 'url'])
weeks = Lecture.get_related(Week, lectures, fields=['number'], use_extra=False)
schedule_weeks = set()
for lecture_week_set in weeks.values():
for lecture_week in lecture_week_set:
schedule_weeks.add(lecture_week)
schedule_weeks = list(schedule_weeks)
schedule_weeks.sort()
if schedule_weeks:
schedule_weeks = range(schedule_weeks[0], schedule_weeks[-1]+1)
next_week = None
prev_week = None
# TODO(adamcik): lookup actuall valid weeks.
if week and week < max_week:
next_week = week+1
if week and week > 1:
prev_week = week-1
# Init colors in predictable maner
for c in courses:
color_map[c.id]
# Create Timetable
table = timetable.Timetable(lectures)
if week:
table.set_week(semester.year, week)
if lectures:
table.place_lectures()
table.do_expansion()
table.insert_times()
table.add_markers()
if advanced:
subscriptions = Subscription.objects.get_subscriptions(year, semester.type, slug)
# Set up and course name forms
for course in courses:
alias = course.alias or ''
course.alias_form = forms.CourseAliasForm(
initial={'alias': alias}, prefix=course.id)
try:
next_semester = Semester.objects.next()
next_message = Subscription.objects.get_subscriptions(
next_semester.year, next_semester.type, slug).count() == 0
except Semester.DoesNotExist:
next_semester = None
next_message = False
week_is_current = semester.year == today().year and week == current_week
return shortcuts.render(request, 'schedule.html', {
'advanced': advanced,
'all': all,
'color_map': color_map,
'courses': courses,
'current': (week == current_week),
'current_week': current_week,
'exams': exams,
'next_message': next_message,
'lectures': lectures,
'semester': semester,
'week_is_current': week_is_current,
'next_semester': next_semester,
'slug': slug,
'timetable': table,
'week': week,
'next_week': next_week,
'prev_week': prev_week,
'rooms': rooms,
'weeks': schedule_weeks,
'groups': groups,
'lecturers': lecturers,
'lecture_weeks': weeks,
'student': student,
})