326 lines
12 KiB
Python
326 lines
12 KiB
Python
from django.db.models import Q
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from django.utils.safestring import mark_safe
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from django.utils.html import escape
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from django.utils.timezone import localtime
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from django.core.cache import cache
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from django.core.urlresolvers import reverse
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from datetime import datetime, timedelta
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from copy import deepcopy
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from collections import OrderedDict, namedtuple
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from itertools import islice
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from zlib import adler32
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from .models import Conference, Talk, Room
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Event = namedtuple('Event', ['talk', 'row', 'rowcount'])
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class Program:
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def __init__(self, site, pending=False, cache=True):
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self.site = site
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self.pending = pending
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self.cache = cache
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self.initialized = False
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def _lazy_init(self):
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self.conference = Conference.objects.get(site=self.site)
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self.talks = Talk.objects.\
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exclude(category__label__exact='').\
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filter(site=self.site, room__isnull=False, start_date__isnull=False).\
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filter(Q(duration__gt=0) | Q(category__duration__gt=0))
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if self.pending:
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self.talks = self.talks.exclude(accepted=False)
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else:
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self.talks = self.talks.filter(accepted=True)
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self.talks = self.talks.order_by('start_date')
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self.rooms = Room.objects.filter(talk__in=self.talks.all()).order_by('name').distinct()
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self.days = {}
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for talk in self.talks.all():
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duration = talk.estimated_duration
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assert(duration)
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dt1 = talk.start_date
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d1 = localtime(dt1).date()
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if d1 not in self.days.keys():
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self.days[d1] = {'timeslots': []}
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dt2 = dt1 + timedelta(minutes=duration)
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d2 = localtime(dt2).date()
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if d2 not in self.days.keys():
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self.days[d2] = {'timeslots': []}
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if dt1 not in self.days[d1]['timeslots']:
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self.days[d1]['timeslots'].append(dt1)
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if dt2 not in self.days[d2]['timeslots']:
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self.days[d2]['timeslots'].append(dt2)
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self.cols = OrderedDict([(room, 1) for room in self.rooms])
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for day in self.days.keys():
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self.days[day]['timeslots'] = sorted(self.days[day]['timeslots'])
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self.days[day]['rows'] = OrderedDict([(timeslot, OrderedDict([(room, []) for room in self.rooms])) for timeslot in self.days[day]['timeslots'][:-1]])
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for talk in self.talks.exclude(plenary=True).all():
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self._add_talk(talk)
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for talk in self.talks.filter(plenary=True).all():
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self._add_talk(talk)
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self.initialized = True
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def _add_talk(self, talk):
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room = talk.room
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dt1 = talk.start_date
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d1 = localtime(dt1).date()
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dt2 = talk.start_date + timedelta(minutes=talk.estimated_duration)
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d2 = localtime(dt2).date()
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assert(d1 == d2) # this is a current limitation
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dt1 = self.days[d1]['timeslots'].index(dt1)
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dt2 = self.days[d1]['timeslots'].index(dt2)
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col = None
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for row, timeslot in enumerate(islice(self.days[d1]['timeslots'], dt1, dt2)):
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if col is None:
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col = 0
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while col < len(self.days[d1]['rows'][timeslot][room]) and self.days[d1]['rows'][timeslot][room][col]:
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col += 1
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self.cols[room] = max(self.cols[room], col+1)
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event = Event(talk=talk, row=row, rowcount=dt2-dt1)
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while len(self.days[d1]['rows'][timeslot][room]) <= col:
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self.days[d1]['rows'][timeslot][room].append(None)
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self.days[d1]['rows'][timeslot][room][col] = event
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def _html_header(self):
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output = '<td>Room</td>'
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room_cell = '<td%(options)s>%(name)s<br><b>%(label)s</b></td>'
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for room, colspan in self.cols.items():
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options = ' style="min-width: 100px;" colspan="%d"' % colspan
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output += room_cell % {'name': escape(room.name), 'label': escape(room.label), 'options': options}
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return '<tr>%s</tr>' % output
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def _html_body(self):
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output = ''
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for day in sorted(self.days.keys()):
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output += self._html_day_header(day)
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output += self._html_day(day)
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return output
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def _html_day_header(self, day):
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row = '<tr><td colspan="%(colcount)s"><h3>%(day)s</h3></td></tr>'
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colcount = 1
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for room, col in self.cols.items():
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colcount += col
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return row % {
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'colcount': colcount,
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'day': datetime.strftime(day, '%A %d %B'),
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}
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def _html_day(self, day):
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output = []
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rows = self.days[day]['rows']
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for ts, rooms in rows.items():
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output.append(self._html_row(day, ts, rooms))
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return '\n'.join(output)
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def _html_row(self, day, ts, rooms):
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row = '<tr style="%(style)s">%(timeslot)s%(content)s</tr>'
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cell = '<td%(options)s>%(content)s</td>'
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content = ''
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for room, events in rooms.items():
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colspan = 1
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for i in range(self.cols[room]):
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options = ' colspan="%d"' % colspan
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cellcontent = ''
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if i < len(events) and events[i]:
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event = events[i]
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if event.row != 0:
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continue
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options = ' rowspan="%d" bgcolor="%s"' % (event.rowcount, event.talk.category.color)
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cellcontent = escape(str(event.talk)) + '<br><em>' + escape(event.talk.get_speakers_str()) + '</em>'
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elif (i+1 > len(events) or not events[i+1]) and i+1 < self.cols[room]:
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colspan += 1
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continue
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colspan = 1
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content += cell % {'options': options, 'content': mark_safe(cellcontent)}
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style, timeslot = self._html_timeslot(day, ts)
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return row % {
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'style': style,
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'timeslot': timeslot,
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'content': content,
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}
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def _html_timeslot(self, day, ts):
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template = '<td>%(content)s</td>'
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start = ts
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end = self.days[day]['timeslots'][self.days[day]['timeslots'].index(ts)+1]
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duration = (end - start).seconds / 60
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date_to_string = lambda date: datetime.strftime(localtime(date), '%H:%M')
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style = 'height: %dpx;' % int(duration * 1.2)
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timeslot = '<td>%s – %s</td>' % tuple(map(date_to_string, [start, end]))
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return style, timeslot
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def _as_html(self):
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template = """<table class="table table-bordered text-center">\n%(header)s\n%(body)s\n</table>"""
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if not self.initialized:
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self._lazy_init()
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return template % {
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'header': self._html_header(),
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'body': self._html_body(),
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}
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def _as_xml(self):
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if not self.initialized:
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self._lazy_init()
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result = """<?xml version="1.0" encoding="UTF-8"?>
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<schedule>
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%(conference)s
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%(days)s
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</schedule>
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"""
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if not len(self.days):
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return result % {'conference': '', 'days': ''}
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conference_xml = """<conference>
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<title>%(title)s</title>
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<subtitle></subtitle>
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<venue>%(venue)s</venue>
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<city>%(city)s</city>
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<start>%(start_date)s</start>
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<end>%(end_date)s</end>
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<days>%(days_count)s</days>
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<day_change>09:00:00</day_change>
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<timeslot_duration>00:05:00</timeslot_duration>
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</conference>
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""" % {
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'title': self.site.name,
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'venue': ', '.join(map(lambda x: x.strip(), self.conference.venue.split('\n'))),
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'city': self.conference.city,
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'start_date': sorted(self.days.keys())[0].strftime('%Y-%m-%d'),
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'end_date': sorted(self.days.keys(), reverse=True)[0].strftime('%Y-%m-%d'),
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'days_count': len(self.days),
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}
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days_xml = ''
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for index, day in enumerate(sorted(self.days.keys())):
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days_xml += '<day index="%(index)s" date="%(date)s">\n' % {
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'index': index + 1,
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'date': day.strftime('%Y-%m-%d'),
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}
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for room in self.rooms.all():
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days_xml += ' <room name="%s">\n' % room.name
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for talk in self.talks.filter(room=room).order_by('start_date'):
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if localtime(talk.start_date).date() != day:
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continue
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duration = talk.estimated_duration
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persons = ''
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for speaker in talk.speakers.all():
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persons += ' <person id="%(person_id)s">%(person)s</person>\n' % {
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'person_id': speaker.id,
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'person': str(speaker),
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}
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links = ''
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registration = ''
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#if talk.registration_required and self.conference.subscriptions_open:
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# links += mark_safe("""
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# <link tag="registration">%(link)s</link>""" % {
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# 'link': reverse('register-for-a-talk', args=[talk.slug]),
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# })
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# registration = """
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# <attendees_max>%(max)s</attendees_max>
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# <attendees_remain>%(remain)s</attendees_remain>""" % {
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# 'max': talk.attendees_limit,
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# 'remain': talk.remaining_attendees or 0,
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# }
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#if talk.materials:
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# links += mark_safe("""
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# <link tag="slides">%(link)s</link>""" % {
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# 'link': talk.materials.url,
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# })
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#if talk.video:
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# links += mark_safe("""
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# <link tag="video">%(link)s</link>""" % {
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# 'link': talk.video,
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# })
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days_xml += """ <event id="%(id)s">
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<start>%(start)s</start>
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<duration>%(duration)s</duration>
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<room>%(room)s</room>
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<slug>%(slug)s</slug>
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<title>%(title)s</title>
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<subtitle/>
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<track>%(track)s</track>
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<type>%(type)s</type>
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<language/>
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<description>%(description)s</description>
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<persons>
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%(persons)s </persons>
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<links>%(links)s
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</links>%(registration)s
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</event>\n""" % {
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'id': talk.id,
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'start': localtime(talk.start_date).strftime('%H:%M'),
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'duration': '%02d:%02d' % (talk.estimated_duration / 60, talk.estimated_duration % 60),
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'room': escape(room.name),
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'slug': escape(talk.slug),
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'title': escape(talk.title),
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'track': escape(talk.track or ''),
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'type': escape(talk.category.label),
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'description': escape(talk.description),
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'persons': persons,
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'links': links,
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'registration': registration,
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}
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days_xml += ' </room>\n'
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days_xml += '</day>\n'
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return result % {
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'conference': '\n'.join(map(lambda x: ' ' + x, conference_xml.split('\n'))),
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'days': '\n'.join(map(lambda x: ' ' + x, days_xml.split('\n'))),
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}
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def _as_ics(self):
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if not self.initialized:
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self._lazy_init()
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talks = [ICS_TALK.format(site=self.site, talk=talk) for talk in self.talks]
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return ICS_MAIN.format(site=self.site, talks='\n'.join(talks))
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def render(self, output='html'):
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if self.cache:
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cache_entry = 'ponyconf-%d' % adler32('|'.join(map(str, [self.site.domain, output, self.pending])).encode('utf-8'))
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result = cache.get(cache_entry)
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if not result:
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result = getattr(self, '_as_%s' % output)()
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cache.set(cache_entry, result, 3 * 60 * 60) # 3H
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return mark_safe(result)
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else:
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return mark_safe(getattr(self, '_as_%s' % output)())
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def __str__(self):
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return self.render()
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# FIXME definitely the wrong place for this, but hey, other templates are already here :P
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ICS_MAIN = """BEGIN:VCALENDAR
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PRODID:-//{site.domain}//{site.name}//FR
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X-WR-CALNAME:PonyConf
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X-WR-TIMEZONE:Europe/Paris
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VERSION:2.0
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CALSCALE:GREGORIAN
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METHOD:PUBLISH
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{talks}
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END:VCALENDAR"""
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ICS_TALK = """BEGIN:VEVENT
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DTSTART:{talk.dtstart}
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DTEND:{talk.dtend}
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SUMMARY:{talk.title}
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LOCATION:{talk.room}
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STATUS: CONFIRMED
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DESCRIPTION:{talk.description}
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UID:{site.domain}/{talk.id}
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END:VEVENT
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"""
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