HTML Calendar code

[Dan Bishop]

On Jan 13, 11:35 am, Kajsa Anka <bluej... at mac.com> wrote:
> Before I re-invent something I would like to ask if there exists some code
> that can be used for create the HTML code for a calendar which I then can
> include on a web page.
>
> The module in the standard library can create a calendar but I would like
> display my schedule.
>
> My idea is that it would read a simple text file and then create a weekly
> calendar view (and/or a monthly) with my schedule.
>
> Does some the code for this exist? (the ones I found all created calendars
> but doesn't seem to include any schedule)

Here's most of a monthly calendar CGI script I wrote a couple of years
ago.  Modify it to your needs.

# ------------ CONSTANTS ------------

MONTH_NAMES = (None, # Use 1-based indexing
               'January', 'February', 'March', 'April', 'May', 'June',
'July',
               'August', 'September', 'October', 'November',
'December')

DAY_NAMES = ('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday',
'Friday',
             'Saturday')

# ------------ DATABASE FUNCTIONS ------------

official_events = shelve.open('../data/calendar/official.shelf')
unofficial_events = shelve.open('../data/calendar/unofficial.shelf')

def get_events(year, month, day):
   key = '%04d-%02d-%02d' % (year, month, day)
   events = official_events.get(key, [])
   if common.user and common.user.permissions.calendar_u:
      events += unofficial_events.get(key, [])
   return events

# ------------ CALCULATION FUNCTIONS ------------

def is_leap_year(year):
   return year % 4 == 0 and (year % 100 != 0 or year % 400 == 0)

def days_in_month(month, year):
   if month == 2:
      if is_leap_year(year):
         return 29
      else:
         return 28
   elif month in (4, 6, 9, 11):
      return 30
   else:
      return 31

# ------------ DISPLAY FUNCTIONS ------------

def get_links(year, month):
   "Return URLs for previous month and next month."
   old_year = year
   old_month = month - 1
   if old_month == 0:
      old_month = 12
      old_year -= 1
   left_link = 'calendar.py?year=%d&month=%d' % (old_year,
old_month)
   new_year = year
   new_month = month + 1
   if new_month == 13:
      new_month = 1
      new_year += 1
   right_link = '?year=%d&month=%d' % (new_year, new_month)
   return left_link, right_link

def print_navigation(year, month):
   prev_link, next_link = get_links(year, month)
   document.write('<table class="navigation"><tr>')
   document.write('<td class="prev_link">')
   document.write('<a href="%s">← previous month</a>' % prev_link)
   document.write('</td><td class="next_link">')
   document.write('<a href="%s">next month →</a>' % next_link)
   document.write('</td></tr></table>')

def print_day_names():
   document.write('<tr>')
   for day in DAY_NAMES:
      document.write('<th class="dayname">%s</th>' % day)
   document.write('</tr>')

def print_calendar(year, month):
   document.write('<h2>%s %d</h2>' % (MONTH_NAMES[month], year))
   print_navigation(year, month)
   document.write('<table class="calendar">')
   print_day_names()
   days = days_in_month(month, year)
   start_offset = (datetime.date(year, month, 1).weekday() + 1) % 7
   document.write('<tr class="week">')
   for i in xrange(start_offset):
      document.write('<td class="invalid" />')
   column = start_offset
   for day in xrange(1, days+1):
      events = get_events(year, month, day)
      if events:
         document.write('<td class="event">')
         document.write(str(day))
         document.write('<ul>')
         for event in events:
            document.write('<li>%s</li>' % cgi.escape(event))
         document.write('</ul></td>')
      else:
         document.write('<td class="noevent">%d</td>' % day)
      column += 1
      if column == 7 and day != days:
         document.write('</tr><tr class="week">')
         column = 0
   for i in xrange((7 - column) % 7):
      document.write('<td class="invalid" />')
   document.write('</tr></table>')

# ------------ MAIN PROGRAM ------------

current_date = datetime.date.today()
form = cgi.FieldStorage()

try:
   year = int(form['year'].value)
except:
   year = current_date.year

try:
   month = int(form['month'].value)
except:
   month = current_date.month
if month < 1 or month > 12:
   month = current_date.month

common.print_header('Calendar')
document.write_txt2tags_file('../data/text/intro_calendar')
print_calendar(year, month)
common.print_footer()