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sched_parse.py
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# sched_parse.py: Parse course schedule from Minerva into a dict representation
# This file is from Minervac, a command-line client for Minerva
# <http://npaun.ca/projects/minervac>
# (C) Copyright 2016-2017 Nicholas Paun
from bs4 import BeautifulSoup
from datetime import datetime as dt
from minerva_common import *
import config
import sys,urllib,re
def parse_schedule(text,separate_wait = True):
html = BeautifulSoup(text,'html5lib')
tbls_course = html.body.find_all('table',{'summary': 'This layout table is used to present the schedule course detail'})
tbls_sched = html.body.find_all('table',{'summary': 'This table lists the scheduled meeting times and assigned instructors for this class..'})
entries = []
wait_entries = []
for course,sched in zip(tbls_course,tbls_sched):
entry = {}
title,course_name,section = course.caption.text.split(" - ")
entry['title'] = title[:-1] # No period
entry['subject'],entry['course'] = course_name.split(" ")
entry['section'] = section
entry['_code'] = "-".join([entry['subject'],entry['course'],entry['section']])
course_table = course.findAll('td')
if len(course_table) == 8:
fields = ['term','crn','status','instructor','grade_mode','credits','level','campus']
elif len(course_table) == 10:
fields = ['term','crn','status','wait_pos','wait_notify_expires','instructor','grade_mode','credits','level','campus']
for field,cell in zip(fields,course_table):
entry[field] = cell.text.strip().replace("\n","; ")
if entry[field] == '':
entry[field] = '{0}'
entry['instructor'] = entry['instructor'].replace(', ','')
entry['_instructor_sn'] = entry['instructor'].split('; ')[0].split(' ')[-1]
if entry['credits'][-4:] == '.000': #Strip decimals when irrelevant
entry['credits'] = entry['credits'][:-4]
entry['_status_desc'],entry['_status_date'] = entry['status'].split(" on ")
entry['_status_desc'] = get_status_code(entry['_status_desc'],short=True)
entry['_status_date'] = dt.strptime(entry['_status_date'],'%b %d, %Y').strftime(config.date_fmt['short_date'])
if 'wait_notify_expires' in entry and entry['wait_notify_expires'] is not None and entry['wait_notify_expires'] != '{0}':
entry['wait_notify_expires'] = dt.strptime(entry['wait_notify_expires'],minerva_date['full']).strftime(config.date_fmt['short_datetime'])
entry['_action_desc'] = "[\033[1;32mReg by " + entry['wait_notify_expires'] + "\033[0m]"
elif 'wait_pos' in entry:
entry['_action_desc'] = "[#" + entry['wait_pos'] + " on waitlist]"
else:
entry['_action_desc'] = ''
if entry['_status_desc'] == 'W':
entry['_action_desc'] = '[Withdrawn from this course]'
sched_table = sched.findAll('td')
fields = ['time_range','days','location','date_range','type','instructors']
for field,cell in zip(fields,sched_table):
entry[field] = cell.text.strip()
entry['_day_idx'] = day_index(entry['days'])
entry['type'] = get_type_abbrev(entry['type'])
loc_bits = entry['location'].rsplit(" ",1)
if len(loc_bits) == 2:
entry['_building'],entry['_room'] = loc_bits
else:
entry['_building'] = loc_bits[0]
entry['_room'] = ''
entry['_building'] = entry['_building'].strip()
entry['_link_gmaps'] = "http://maps.google.com/?" + urllib.urlencode([('saddr','My Location'),('daddr',entry['_building'] + ", Montreal")])
entry['_building'] = get_bldg_abbrev(entry['_building']).strip()
t_bits = entry['time_range'].split(" - ")
if len(t_bits) == 2:
t_start,t_end = entry['time_range'].split(" - ")
t_start = dt.strptime(t_start,minerva_date['time']).strftime(config.date_fmt['short_time'])
t_end = dt.strptime(t_end,minerva_date['time']).strftime(config.date_fmt['short_time'])
t_range = '-'.join([t_start,t_end])
entry['_time'] = {}
entry['_time']['start'] = t_start
entry['_time']['end'] = t_end
entry['time_range'] = t_range
else:
entry['time_range'] = t_bits[0]
d_start,d_end = entry['date_range'].split(" - ")
d_start = dt.strptime(d_start,minerva_date['date']).strftime(config.date_fmt['full_date'])
d_end = dt.strptime(d_end,minerva_date['date']).strftime(config.date_fmt['full_date'])
d_range = ' / '.join([d_start,d_end]) #ISO made me do it
entry['_date'] = {'start': d_start,'end': d_end}
entry['date_range'] = d_range
if ('wait_pos' in entry and 'wait_pos' is not None and separate_wait) or entry['_status_desc'] == 'W':
wait_entries.append(entry)
else:
entries.append(entry)
if separate_wait:
return (entries,wait_entries)
else:
return entries
def print_sched(sched,columns):
for entry in sched:
for col in columns:
if col in entry:
sys.stdout.write(entry[col] + "\t")
else:
sys.stdout.write(col)
print ""
def print_sched_report(sched,report = 'default'):
(fmt,sched) = prepare_report(report,sched)
for entry in sched: sys.stdout.write(apply_format(entry,fmt))
def find_conflicts(sched,report = 'conflicts'):
(fmt,sched) = prepare_report(report,sched,sort = False)
instances = []
weekdays = get_minerva_weekdays()
for entry in sched:
for day in entry['days']:
weekday = weekdays.index(day)
key = str(weekday) + dt.strptime(entry['_time']['start'],config.date_fmt['short_time']).strftime('%H%M')
end = str(weekday) + dt.strptime(entry['_time']['end'],config.date_fmt['short_time']).strftime('%H%M')
instances.append((key,end,entry))
instances = sorted(instances)
conflict_pairs = []
i = -1
for curr in instances[:-1]:
i += 1
(c_start,c_end,c_entry) = curr
(n_start,n_end,n_entry) = instances[i+1]
pair = c_entry['_code'] + "," + n_entry['_code']
if c_start[0] != n_start[0]: #We've run out of courses for the day
continue
elif pair in conflict_pairs: #We already know what happens
continue
elif (c_start < n_end) and (c_end > n_start): #Formal definition of a time conflict
conflict_pairs.append(pair)
print_conflict(fmt,c_entry,n_entry)
def print_conflict(fmt,curr,next):
intersect = "".join(list(set(curr['days']).intersection(set(next['days']))))
print "* Conflict: \033[1;31m%s %s-%s\033[0m" % (intersect,next['_time']['start'], curr['_time']['end'])
sys.stdout.write(apply_format(curr,fmt))
sys.stdout.write(apply_format(next,fmt))
def prepare_report(report,sched,sort = True):
if report not in config.reports:
print "Error! Report not found"
sys.exit(MinervaError.user_error)
report = config.reports[report]
if sort:
sorted = multi_keysort(sched,report['sort'])
else:
sorted = sched
return ((report['columns'],report['format']),sorted)
def apply_format(entry,fmt):
columns, fmt_string = fmt
vals = []
for col in columns:
vals.append(entry[col])
return fmt_string % tuple(vals)
# Copypasta from this Stackoverflow answer. http://stackoverflow.com/a/1144405. Python apparently sucks.
def multi_keysort(items, columns):
if columns is None:
return items
from operator import itemgetter
comparers = [((itemgetter(col[1:].strip()), -1) if col.startswith('-') else
(itemgetter(col.strip()), 1)) for col in columns]
def nat(s, _nsre=re.compile('([0-9]+)')):
def value(text):
if text.isdigit():
return int(text)
elif type(text) == str:
return text.lower()
else:
return text
if type(s) == str:
return [value(text) for text in re.split(_nsre, s)]
else:
return [s]
def comparer(left, right):
for fn, mult in comparers:
lval = nat(fn(left))
rval = nat(fn(right))
result = cmp(lval, rval)
if result:
return mult * result
else:
return 0
return sorted(items, cmp=comparer)
def day_index(days):
m_weekdays = get_minerva_weekdays()
index = ""
for day in days:
index += str(m_weekdays.index(day) + 1)
return days
return index.ljust(7,'0')
def course_details_report(text,report = 'default'):
reg,wait = parse_schedule(text)
if reg:
print ""
print "* Registered:"
print_sched_report(reg,report)
if wait:
print ""
print "* Waitlist / Withdrawn / Other:"
print_sched_report(wait,report)
def conflict_report(text,report = 'conflicts'):
sched = parse_schedule(text,separate_wait = False)
find_conflicts(sched,report)