views.py 26.2 KB
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from datetime import datetime, timedelta
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import math
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import random
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import os
import stat
import time
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from django.conf import settings
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from django.http import Http404
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from django.views.decorators.cache import cache_control
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from django.views.generic.base import TemplateView
from django.views.generic.detail import DetailView
from django.views.decorators.csrf import csrf_exempt
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from django.views.generic.dates import _date_from_string
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from django.core.paginator import Paginator

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from django.contrib.sites.models import Site
from django.contrib.syndication.views import Feed, add_domain
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from django.utils.feedgenerator import Atom1Feed

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from haystack.query import SearchQuerySet
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from jsonresponse import to_json

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from emissions.models import Category, Emission, Episode, Diffusion, SoundFile, \
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        Schedule, Nonstop, NewsItem, NewsCategory, Focus
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from emissions.utils import whatsonair, period_program
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from newsletter.forms import SubscribeForm
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from nonstop.utils import get_current_nonstop_track
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from . import utils

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class EmissionMixin:
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    def get_emission_context(self, emission, episode_ids=None):
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        context = {}
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        # get all episodes, with an additional attribute to get the date of
        # their first diffusion
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        episodes_queryset = Episode.objects.select_related()
        if episode_ids is not None:
            episodes_queryset = episodes_queryset.filter(id__in=episode_ids)
        else:
            episodes_queryset = episodes_queryset.filter(emission=emission)

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        context['episodes'] = \
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                episodes_queryset.extra(select={
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                        'first_diffusion': 'emissions_diffusion.datetime',
                        },
                        select_params=(False, True),
                        where=['''datetime = (SELECT MIN(datetime)
                                                FROM emissions_diffusion
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                                               WHERE episode_id = emissions_episode.id
                                                 AND datetime <= CURRENT_TIMESTAMP)'''],
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                        tables=['emissions_diffusion'],
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                    ).order_by('-first_diffusion').distinct()
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        context['futurEpisodes'] = \
                episodes_queryset.extra(select={
                        'first_diffusion': 'emissions_diffusion.datetime',
                        },
                        select_params=(False, True),
                        where=['''datetime = (SELECT MIN(datetime)
                                                FROM emissions_diffusion
                                               WHERE episode_id = emissions_episode.id
                                                 AND datetime > CURRENT_TIMESTAMP)'''],
                        tables=['emissions_diffusion'],
                    ).order_by('first_diffusion').distinct()


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        # get all related soundfiles in a single query
        soundfiles = {}
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        if episode_ids is not None:
            for episode_id in episode_ids:
                soundfiles[episode_id] = None
        else:
            for episode in Episode.objects.filter(emission=emission):
                soundfiles[episode.id] = None

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        for soundfile in SoundFile.objects.select_related().filter(podcastable=True,
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                fragment=False, episode__emission=emission):
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            soundfiles[soundfile.episode_id] = soundfile

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        Episode.set_prefetched_soundfiles(soundfiles)
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        #context['futurEpisodes'] = context['episodes'].filter(first_diffusion='2013')[0:3]

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        return context
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class EmissionDetailView(DetailView, EmissionMixin):
    model = Emission

    def get_context_data(self, **kwargs):
        context = super(EmissionDetailView, self).get_context_data(**kwargs)
        context['sectionName'] = "Emissions"
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        context['schedules'] = Schedule.objects.select_related().filter(
                emission=self.object).order_by('rerun', 'datetime')
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        context['news'] = NewsItem.objects.all().filter(emission=self.object.id).order_by('-date')[:3]
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        context.update(self.get_emission_context(self.object))
        return context
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emission = EmissionDetailView.as_view()

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class EpisodeDetailView(DetailView, EmissionMixin):
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    model = Episode

    def get_context_data(self, **kwargs):
        context = super(EpisodeDetailView, self).get_context_data(**kwargs)
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        context['sectionName'] = "Emissions"
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        context['diffusions'] = Diffusion.objects.select_related().filter(
                episode=self.object.id).order_by('datetime')
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        try:
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            context['emission'] = context['episode'].emission
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        except Emission.DoesNotExist:
            raise Http404()
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        if self.kwargs.get('emission_slug') != context['emission'].slug:
            raise Http404()
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        context.update(self.get_emission_context(context['emission']))
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        return context
episode = EpisodeDetailView.as_view()

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class EmissionEpisodesDetailView(DetailView, EmissionMixin):
    model = Emission
    template_name = 'emissions/episodes.html'

    def get_context_data(self, **kwargs):
        context = super(EmissionEpisodesDetailView, self).get_context_data(**kwargs)
        context['sectionName'] = "Emissions"
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        context['schedules'] = Schedule.objects.select_related().filter(
                emission=self.object).order_by('rerun', 'datetime')
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        context['search_query'] = self.request.GET.get('q')
        if context['search_query']:
            # query string
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            sqs = SearchQuerySet().models(Episode).filter(
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                    emission_slug_exact=self.object.slug, text=context['search_query'])
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            episode_ids = [x.pk for x in sqs]
        else:
            episode_ids = None

        context.update(self.get_emission_context(self.object, episode_ids=episode_ids))
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        return context
emissionEpisodes = EmissionEpisodesDetailView.as_view()

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class ProgramView(TemplateView):
    template_name = 'program.html'

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    def get_context_data(self, year=None, week=None, **kwargs):
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        context = super(ProgramView, self).get_context_data(**kwargs)
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        context['sectionName'] = "Emissions"
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        context['weekday'] = datetime.today().weekday()
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        context['week'] = week = int(week) if week is not None else datetime.today().isocalendar()[1]
        context['year'] = year = int(year) if year is not None else datetime.today().isocalendar()[0]
        context['week_first_day'] = utils.tofirstdayinisoweek(year, week)
        context['week_last_day'] = context['week_first_day'] + timedelta(days=6)

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        return context

program = ProgramView.as_view()

class TimeCell:
    nonstop = None
    w = 1
    h = 1
    time_label = None

    def __init__(self, i, j):
        self.x = i
        self.y = j
        self.schedules = []

    def add_schedule(self, schedule):
        end_time = schedule.datetime + timedelta(
                minutes=schedule.get_duration())
        self.time_label = '%02d:%02d-%02d:%02d' % (
                schedule.datetime.hour,
                schedule.datetime.minute,
                end_time.hour,
                end_time.minute)
        self.schedules.append(schedule)

    def __unicode__(self):
        if self.schedules:
            return ', '.join([x.emission.title for x in self.schedules])
        else:
            return self.nonstop

    def __eq__(self, other):
        return (unicode(self) == unicode(other) and self.time_label == other.time_label)


class Grid(TemplateView):
    template_name = 'grid.html'

    def get_context_data(self, **kwargs):
        context = super(Grid, self).get_context_data(**kwargs)
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        context['sectionName'] = "Emissions"
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        nb_lines = 2 * 24 # the cells are half hours
        grid = []

        times = ['%02d:%02d' % (x/2, x%2*30) for x in range(nb_lines)]
        # start grid after the night programs
        times = times[2*Schedule.DAY_HOUR_START:] + times[:2*Schedule.DAY_HOUR_START]

        nonstops = []
        for nonstop in Nonstop.objects.all():
            if nonstop.start < nonstop.end:
                nonstops.append([nonstop.start.hour + nonstop.start.minute/60.,
                                 nonstop.end.hour + nonstop.end.minute/60.,
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                                 nonstop.title, nonstop.slug])
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            else:
                # crossing midnight
                nonstops.append([nonstop.start.hour + nonstop.start.minute/60.,
                                 24,
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                                 nonstop.title, nonstop.slug])
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                nonstops.append([0,
                                 nonstop.end.hour + nonstop.end.minute/60.,
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                                 nonstop.title, nonstop.slug])
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        nonstops.sort()

        for i in range(nb_lines):
            grid.append([])
            for j in range(7):
                grid[-1].append(TimeCell(i, j))

            nonstop = [x for x in nonstops if i>=x[0]*2 and i<x[1]*2][0]
            for time_cell in grid[-1]:
                time_cell.nonstop = nonstop[2]
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                time_cell.nonstop_slug = nonstop[3]
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                if nonstop[1] == 5:
                    # the one ending at 5am will be cut down, so we inscribe
                    # its duration manually
                    time_cell.time_label = '%02d:00-%02d:00' % (
                            nonstop[0], nonstop[1])

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        for schedule in Schedule.objects.prefetch_related(
                'emission__categories').select_related().order_by('datetime'):
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            row_start = schedule.datetime.hour * 2 + \
                    int(math.ceil(schedule.datetime.minute / 30))
            day_no = schedule.get_weekday()

            for step in range(int(math.ceil(schedule.get_duration() / 30.))):
                if grid[(row_start+step)%nb_lines][day_no] is None:
                    grid[(row_start+step)%nb_lines][day_no] = TimeCell()
                grid[(row_start+step)%nb_lines][day_no].add_schedule(schedule)

        # start grid after the night programs
        grid = grid[2*Schedule.DAY_HOUR_START:] + grid[:2*Schedule.DAY_HOUR_START]

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        # look for the case where the same emission has different schedules for
        # the same time cell, for example if it lasts one hour the first week,
        # and two hours the third week.
        for i in range(nb_lines):
            grid[i] = [x for x in grid[i] if x is not None]
            for j, cell in enumerate(grid[i]):
                if grid[i][j] is None:
                    continue
                if len(grid[i][j].schedules) > 1:
                    time_cell_emissions = {}
                    for schedule in grid[i][j].schedules:
                        if not schedule.emission.id in time_cell_emissions:
                            time_cell_emissions[schedule.emission.id] = []
                        time_cell_emissions[schedule.emission.id].append(schedule)
                    for schedule_list in time_cell_emissions.values():
                        if len(schedule_list) == 1:
                            continue
                        # here it is, same cell, same emission, several
                        # schedules
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                        schedule_list.sort(lambda x,y: cmp(x.get_duration(), y.get_duration()))

                        schedule = schedule_list[0]
                        end_time = schedule.datetime + timedelta(
                                minutes=schedule.get_duration())
                        grid[i][j].time_label = '%02d:%02d-%02d:%02d' % (
                                schedule.datetime.hour,
                                schedule.datetime.minute,
                                end_time.hour,
                                end_time.minute)

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                        for schedule in schedule_list[1:]:
                            grid[i][j].schedules.remove(schedule)
                            end_time = schedule.datetime + timedelta(minutes=schedule.get_duration())
                            schedule_list[0].time_label_extra = ', -%02d:%02d %s' % (
                                    end_time.hour, end_time.minute, schedule.weeks_string)

        # merge adjacent
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        # 1st thing is to merge cells on the same line, this will mostly catch
        # consecutive nonstop cells
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        for i in range(nb_lines):
            for j, cell in enumerate(grid[i]):
                if grid[i][j] is None:
                    continue
                t = 1
                try:
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                    # if the cells are identical, they are removed from the
                    # grid, and current cell width is increased
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                    while grid[i][j+t] == cell:
                        cell.w += 1
                        grid[i][j+t] = None
                        t += 1
                except IndexError:
                    pass
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            # once we're done we remove empty cells
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            grid[i] = [x for x in grid[i] if x is not None]

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        # 2nd thing is to merge cells vertically, this is emissions that last
        # for more than 30 minutes
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        for i in range(nb_lines):
            grid[i] = [x for x in grid[i] if x is not None]
            for j, cell in enumerate(grid[i]):
                if grid[i][j] is None:
                    continue
                t = 1
                try:
                    while True:
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                        # we look if the next time cell has the same emissions
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                        same_cell_below = [(bj, x) for bj, x in enumerate(grid[i+cell.h])
                                           if x == cell and x.y == cell.y and x.w == cell.w]
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                        if same_cell_below:
                            # if the cell was identical, we remove it and
                            # increase current cell height
                            bj, same_cell_below = same_cell_below[0]
                            del grid[i+cell.h][bj]
                            cell.h += 1
                        else:
                            # if the cell is different, we have a closer look
                            # to it, so we can remove emissions that will
                            # already be mentioned in the current cell.
                            #
                            # For example:
                            #  - 7am30, seuls contre tout, 1h30
                            #  - 8am, du pied gauche & la voix de la rue, 1h
                            # should produce: (this is case A)
                            #  |      7:30-9:00      |
                            #  |  seuls contre tout  |
                            #  |---------------------|
                            #  |      8:00-9:00      |
                            #  |   du pied gauche    |
                            #  |  la voix de la rue  |
                            #
                            # On the other hand, if all three emissions started
                            # at 7am30, we want: (this is case B)
                            #  |      7:30-9:00      |
                            #  |  seuls contre tout  |
                            #  |   du pied gauche    |
                            #  |  la voix de la rue  |
                            # that is we merge all of them, ignoring the fact
                            # that the other emissions will stop at 8am30
                            current_cell_schedules = set(grid[i][j].schedules)
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                            current_cell_emissions = set([x.emission for x in current_cell_schedules])
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                            cursor = 1
                            while True and current_cell_schedules:
                                same_cell_below = [x for x in grid[i+cursor] if x.y == grid[i][j].y]
                                if not same_cell_below:
                                    cursor += 1
                                    continue
                                same_cell_below = same_cell_below[0]
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                                same_cell_below_emissions = set([x.emission for x in same_cell_below.schedules])

                                if current_cell_emissions.issubset(same_cell_below_emissions):
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                                    # this handles case A (see comment above)
                                    for schedule in current_cell_schedules:
                                        if schedule in same_cell_below.schedules:
                                            same_cell_below.schedules.remove(schedule)
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                                elif same_cell_below_emissions and \
                                        current_cell_emissions.issuperset(same_cell_below_emissions):
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                                    # this handles case B (see comment above)
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                                    # we set the cell time label to the longest
                                    # period
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                                    grid[i][j].time_label = same_cell_below.time_label
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                                    # then we sort emissions so the longest are
                                    # put first
                                    grid[i][j].schedules.sort(
                                            lambda x, y: -cmp(x.get_duration(), y.get_duration()))
                                    # then we add individual time labels to the
                                    # other schedules
                                    for schedule in current_cell_schedules:
                                        if schedule not in same_cell_below.schedules:
                                            end_time = schedule.datetime + timedelta(
                                                    minutes=schedule.get_duration())
                                            schedule.time_label = '%02d:%02d-%02d:%02d' % (
                                                    schedule.datetime.hour,
                                                    schedule.datetime.minute,
                                                    end_time.hour,
                                                    end_time.minute)
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                                    grid[i][j].h += 1
                                    grid[i+cursor].remove(same_cell_below)
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                                elif same_cell_below_emissions and \
                                        current_cell_emissions.intersection(same_cell_below_emissions):
                                    same_cell_below.schedules = [x for x in
                                            same_cell_below.schedules if
                                            x.emission not in
                                            current_cell_emissions or
                                            x.get_duration() < 30]
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                                cursor += 1
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                            break
                except IndexError:
                    pass

        # cut night at 3am
        grid = grid[:42]
        times = times[:42]

        context['grid'] = grid
        context['times'] = times
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        context['categories'] = Category.objects.all()
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        context['weekdays'] = ['Lundi', 'Mardi', 'Mercredi', 'Jeudi',
                'Vendredi', 'Samedi', 'Dimanche']

        return context

grid = Grid.as_view()


class Home(TemplateView):
    template_name = 'home.html'

    def get_context_data(self, **kwargs):
        context = super(Home, self).get_context_data(**kwargs)
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        context['sectionName'] = "Home"
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        context['emissions'] = Emission.objects.filter(archived=False).order_by('-creation_timestamp')[:3]
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        context['newsitems'] = NewsItem.objects.order_by('-date')[:3]
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        context['soundfiles'] = SoundFile.objects.prefetch_related('episode__emission__categories').filter(
                podcastable=True, fragment=False) \
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                .select_related().extra(select={
                    'first_diffusion': 'emissions_diffusion.datetime', },
                    select_params=(False, True),
                    where=['''datetime = (SELECT MIN(datetime)
                                            FROM emissions_diffusion
                                        WHERE episode_id = emissions_episode.id)'''],
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                    tables=['emissions_diffusion'],).order_by('-creation_timestamp').distinct() [:3]
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        context['newsletter_form'] = SubscribeForm()

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        return context

home = Home.as_view()

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class NewsItemView(DetailView):
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    model = NewsItem
    def get_context_data(self, **kwargs):
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        context = super(NewsItemView, self).get_context_data(**kwargs)
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        context['sectionName'] = "News"
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        context['categories'] = NewsCategory.objects.all()
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        context['news'] = NewsItem.objects.all().order_by('-date')
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        return context
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newsitemview = NewsItemView.as_view()
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class News(TemplateView):
    template_name = 'news.html'
    def get_context_data(self, **kwargs):
        context = super(News, self).get_context_data(**kwargs)
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        context['sectionName'] = "News"
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        context['focus'] = NewsItem.objects.filter(got_focus__isnull=False).select_related('category').order_by('-date')[:10]
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        context['news'] = NewsItem.objects.all().order_by('-date')
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        return context

news = News.as_view()

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class Emissions(TemplateView):
    template_name = 'emissions.html'

    def get_context_data(self, **kwargs):
        context = super(Emissions, self).get_context_data(**kwargs)
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        context['sectionName'] = "Emissions"
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        context['emissions'] = Emission.objects.prefetch_related('categories').filter(archived=False).order_by('title')
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        context['categories'] = Category.objects.all()
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        return context

emissions = Emissions.as_view()

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class EmissionsArchives(TemplateView):
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    template_name = 'emissions/archives.html'
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    def get_context_data(self, **kwargs):
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        context = super(EmissionsArchives, self).get_context_data(**kwargs)
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        context['sectionName'] = "Emissions"
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        context['emissions'] = Emission.objects.prefetch_related('categories').filter(archived=True).order_by('title')
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        context['categories'] = Category.objects.all()
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        return context
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emissionsArchives = EmissionsArchives.as_view()

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class Listen(TemplateView):
    template_name = 'listen.html'

    def get_context_data(self, **kwargs):
        context = super(Listen, self).get_context_data(**kwargs)
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        context['sectionName'] = "Listen"
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        context['focus'] = SoundFile.objects.prefetch_related('episode__emission__categories').filter(
                podcastable=True, got_focus__isnull=False) \
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                .select_related().extra(select={
                    'first_diffusion': 'emissions_diffusion.datetime', },
                    select_params=(False, True),
                    where=['''datetime = (SELECT MIN(datetime)
                                            FROM emissions_diffusion
                                        WHERE episode_id = emissions_episode.id)'''],
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                    tables=['emissions_diffusion'],).order_by('-first_diffusion').distinct() [:10]
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        context['soundfiles'] = SoundFile.objects.prefetch_related('episode__emission__categories').filter(
                podcastable=True) \
                .select_related().extra(select={
                    'first_diffusion': 'emissions_diffusion.datetime', },
                    select_params=(False, True),
                    where=['''datetime = (SELECT MIN(datetime)
                                            FROM emissions_diffusion
                                        WHERE episode_id = emissions_episode.id)'''],
                    tables=['emissions_diffusion'],).order_by('-creation_timestamp').distinct() [:10]
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        return context

listen = Listen.as_view()

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@cache_control(max_age=25)
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@csrf_exempt
@to_json('api')
def onair(request):
    d = whatsonair()
    if d.get('episode'):
        d['episode'] = {
            'title': d['episode'].title,
            'url': d['episode'].get_absolute_url()
        }
    if d.get('emission'):
        d['emission'] = {
            'title': d['emission'].title,
            'url': d['emission'].get_absolute_url()
        }
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    if d.get('nonstop'):
        d['nonstop'] = {
            'title': d['nonstop'].title,
        }
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        d.update(get_current_nonstop_track())
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    if d.get('current_slot'):
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        del d['current_slot']
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    return d


class NewsItemDetailView(DetailView):
    model = NewsItem

newsitem = NewsItemDetailView.as_view()
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class PodcastsFeed(Feed):
    title = 'Radio Panik - Podcasts'
    link = '/'
    description_template = 'feed/soundfile.html'
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    def items(self):
        return SoundFile.objects.select_related().filter(
                podcastable=True).order_by('-creation_timestamp')[:5]

    def item_title(self, item):
        if item.fragment:
            return '%s - %s' % (item.title, item.episode.title)
        return item.episode.title
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    def item_link(self, item):
        return item.episode.get_absolute_url()

    def item_enclosure_url(self, item):
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        current_site = Site.objects.get(id=settings.SITE_ID)
        return add_domain(current_site.domain, item.get_format_url('mp3'))
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    def item_enclosure_length(self, item):
        sound_path = item.get_format_path('mp3')
        try:
            return os.stat(sound_path)[stat.ST_SIZE]
        except OSError:
            return 0

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    def item_enclosure_mime_type(self, item):
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        return 'audio/mpeg'

    def item_pubdate(self, item):
        return item.creation_timestamp

podcasts_feed = PodcastsFeed()
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class RssNewsFeed(Feed):
    title = 'Radio Panik'
    link = '/news/'
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    description_template = 'feed/newsitem.html'
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    def items(self):
        return NewsItem.objects.order_by('-date')[:10]

rss_news_feed = RssNewsFeed()

class AtomNewsFeed(RssNewsFeed):
    feed_type = Atom1Feed

atom_news_feed = AtomNewsFeed()
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class Party(TemplateView):
    template_name = 'party.html'

    def get_context_data(self, **kwargs):
        context = super(Party, self).get_context_data(**kwargs)
        t = random.choice(['newsitem']*2 + ['emission']*3 + ['soundfile']*1 + ['episode']*2)
        focus = Focus()
        if t == 'newsitem':
            focus.newsitem = NewsItem.objects.exclude(
                    image__isnull=True).exclude(image__exact='').order_by('?')[0]
        elif t == 'emission':
            focus.emission = Emission.objects.exclude(
                    image__isnull=True).exclude(image__exact='').order_by('?')[0]
        elif t == 'episode':
            focus.episode = Episode.objects.exclude(
                    image__isnull=True).exclude(image__exact='').order_by('?')[0]
        elif t == 'soundfile':
            focus.soundfile = SoundFile.objects.exclude(
                    episode__image__isnull=True).exclude(episode__image__exact='').order_by('?')[0]

        context['focus'] = focus

        return context

party = Party.as_view()